earphones

Abstract

Headphones, comprehensive: a sound-generating component, comprising: a transducer comprising a diaphragm used to generate sound under the influence of an excitation signal; and a housing that forms a chamber to accommodate the transducer; and a suspension structure which, in a worn state, is used to support the sound-generating part at a location where the sound-generating part is near the ear canal without blocking the ear canal, wherein a sound outlet opening is provided on an inner side of the housing facing the auricle, which is used to direct sound generated at a front of the diaphragm out of the housing and then transmit it to the ear canal, wherein a first pressure relief opening is provided on another side of the housing, which is used to dissipate sound generated at a rear side of the diaphragm from the housing, and wherein the distance between the center of the sound outlet opening and a center point of an upper boundary of the inside of the housing is greater than the distance between the center of the first pressure relief opening and the center point of the upper boundary of the inside of the housing.

Description

Cross-reference

[0001] The present application claims priority from the Chinese application filed on October 28, 2022, with application number 202211336918.4, the priority from the Chinese application filed on December 1, 2022, with application number 202223239628.6, the priority from the international application filed on December 30, 2022, with application number PCT / CN 2022 / 144339, the priority from the international application filed on March 2, 2023, with application number PCT / CN 2023 / 079411, the priority from the international application filed on March 2, 2023, with application number PCT / CN 2023 / 079404, and the priority from the international application filed on March 2, 2023, with application number PCT / CN 2023 / 079410, all the contents of which are incorporated herein by reference. become. Technical field

[0002] The present application relates to the technical field of acoustics, in particular to an earphone. State of the art

[0003] With the development of acoustic delivery technology, acoustic devices (such as earphones) have become widely used in everyday life. They can work in conjunction with electronic devices like mobile phones and computers to provide the user with a fantastic audio experience. Depending on how the user wears the acoustic devices, they can generally be divided into categories such as in-ear headphones, headsets, ear hooks, and the like.

[0004] Therefore, it is necessary to provide an earphone that can improve the user's wearing comfort and has good output performance. Disclosure of the invention

[0005] An embodiment of the present application provides an earphone comprising: a sound-generating part comprising a transducer comprising a diaphragm used to generate sound under the influence of an excitation signal; and a housing forming a chamber for receiving the transducer; and a suspension structure which, in a worn state, is used to support the sound-generating part at a location near the ear canal without obstructing the ear canal.On one side of the housing, facing the auricle, a sound outlet is provided. This outlet is used to direct sound generated at the front of the diaphragm out of the housing and then transmit it to the ear canal. On another side of the housing, a first pressure relief opening is provided. This first pressure relief opening is used to direct sound generated at the rear of the diaphragm out of the housing. The distance between the center of the sound outlet opening and the center point of an upper boundary of the inner surface is greater than the distance between the center of the first pressure relief opening and the center point of the upper boundary of the inner surface.

[0006] In some embodiments, the ratio of the distance between the center of the sound outlet opening and the center of the upper boundary of the inner side to the distance between the center of the first pressure relief opening and the center of the upper boundary of the inner side is in the range of 1.3 to 2.1.

[0007] In some embodiments, it is provided that both the ratio of the area of ​​the sound outlet opening to the depth of the sound outlet opening and the ratio of the area of ​​the first pressure relief opening to the depth of the first pressure relief opening are in the range of 1.10 to 1.75.

[0008] In some embodiments, the ratio of the area of ​​the sound outlet opening to the area of ​​the first pressure relief opening is in the range of 0.5 to 1.5.

[0009] In some embodiments, it is provided that, in the worn state, the ratio of the distance between a projection point of the center of the sound outlet opening onto the sagittal plane and the centroid of a projection of an ear canal opening of the ear canal onto the sagittal plane to the distance between a projection point of the center of the first pressure relief opening onto the sagittal plane and the centroid of the projection of the ear canal opening onto the sagittal plane is in the range of 0.10 to 0.35.

[0010] In some embodiments, the suspension structure comprises an ear hook, wherein, in the worn state, a first part of the ear hook hangs between the auricle and the user's head, wherein a second part of the ear hook extends towards a side of the auricle facing away from the head and is connected to the sound-generating part, and wherein the ratio of the distance between the center of the sound outlet opening and an upper apex of the ear hook to the distance between the center of the first pressure relief opening and the upper apex of the ear hook is in the range of 1.10 to 1.70.

[0011] In some embodiments, the transducer further comprises a magnetic circuit arrangement, wherein the magnetic circuit arrangement is used to provide a magnetic field, and wherein the absolute value of the difference between the center of the sound outlet opening and the median plane of a long axis of the magnetic circuit arrangement from the distance between the center of the first pressure relief opening and the median plane of the long axis is in the range of 4.0 mm to 6.1 mm.

[0012] In some embodiments, the difference in distance between the center of the sound outlet opening and the base of the magnetic circuit arrangement from the distance between the center of the first pressure relief opening and the base of the magnetic circuit arrangement is in the range of 3.65 mm to 7.05 mm.

[0013] In some embodiments, a second pressure relief opening is provided on another side of the housing, wherein the area of ​​the first pressure relief opening is larger than the area of ​​the second pressure relief opening.

[0014] In some embodiments, the distance between the center of the sound outlet opening and the perpendicular plane of a connecting line between the center of the first pressure relief opening and the center of the second pressure relief opening is 0 mm to 2 mm.

[0015] In some embodiments, the first pressure relief opening is provided on a top side of the housing and the second pressure relief opening is provided on a bottom side of the housing.

[0016] In some embodiments, it is provided that, in the supported state, the ratio of the distance between the projection point of the center of the sound outlet opening onto the sagittal plane and the projection point of a point at the third of a lower boundary of the inside onto the sagittal plane to the distance between the projection point of the center of the second pressure relief opening onto the sagittal plane and the projection point of the point at the third of the lower boundary of the inside onto the sagittal plane is in the range of 0.65 to 1.05.

[0017] In some embodiments, an angle between a connecting line from the center of the sound outlet opening to the center of the first pressure relief opening and a connecting line from the center of the sound outlet opening to the center of the second pressure relief opening is in the range of 46.40° to 114.04°.

[0018] In some embodiments, the ratio of the distance between the center of the sound outlet opening and the center of the first pressure relief opening to the distance between the center of the sound outlet opening and the center of the second pressure relief opening is in the range of 0.9 to 1.1.

[0019] In some embodiments, the ratio of the area of ​​the sound outlet opening to the total area of ​​the first pressure relief opening and the second pressure relief opening is in the range of 0.1 to 0.99.

[0020] In some embodiments, the membrane divides the chamber into a front chamber and a rear chamber, corresponding to the front and rear sides of the membrane, respectively, with the ratio of the volume of the rear chamber to the volume of the front chamber being in the range of 0.1 to 10.

[0021] In some embodiments, the membrane divides the chamber into a front chamber and a rear chamber, corresponding to the front and rear sides of the membrane, respectively, with the ratio of the resonance frequency of the front chamber to the resonance frequency of the rear chamber being in the range of 0.1 to 5.

[0022] In some embodiments, the ratio of the area of ​​the sound outlet opening to the total area of ​​the first pressure relief opening and the second pressure relief opening is in the range of 1 to 10.

[0023] In some embodiments, the membrane divides the chamber into a front chamber and a rear chamber, corresponding to the front and rear sides of the membrane, respectively, with the ratio of the volume of the rear chamber to the volume of the front chamber being in the range of 0.1 to 10.

[0024] In some embodiments, the diaphragm divides the chamber into a front chamber and a rear chamber, corresponding to the front and rear sides of the diaphragm, respectively, with the ratio of the resonant frequency of the front chamber to the resonant frequency of the rear chamber being in the range of 0.5 to 10.

[0025] In some embodiments, the ratio of the sound pressure at the sound outlet opening to the total sound pressure at the first pressure relief opening and the second pressure relief opening is in the range of 0.4 to 0.6.

[0026] In some embodiments, the ratio of the difference between the area of ​​the first pressure relief opening and the area of ​​the second pressure relief opening to the area of ​​the sound outlet opening is in the range of 2.5 to 3.9.

[0027] In some embodiments, a sound-absorbing mesh is provided at the position of at least one of the sound outlet openings, the first pressure relief opening and the second pressure relief opening, the thickness of which is in the range of 40 µm to 150 µm.

[0028] In some embodiments, the sound-absorbing mesh at the sound outlet opening is a steel mesh with a mesh size in the range of 60 to 100.

[0029] In some embodiments, the sound-absorbing mesh at the sound outlet opening is a steel mesh with a mesh size in the range of 70 to 90. Brief description of the characters

[0030] The present application is further illustrated by exemplary embodiments, which are described in detail by the accompanying drawings. These embodiments are not limiting. In the embodiments, the same structure is designated with the same reference numeral. In the figures: Fig. Figure 1 shows a schematic representation of an exemplary ear according to some embodiments of the present description; Fig. 2 shows an exemplary structural representation of an earphone according to some embodiments of the present description; Fig. Figure 3 shows a schematic representation of two point sound sources and a listening position according to some embodiments of the present description; Fig. Figure 4 shows a comparison diagram of the sound loss indices with respect to a single-point sound source and a double-point sound source at different frequencies according to some embodiments of the present description; Fig. Figure 5 shows a schematic representation of an exemplary distribution for a dipole sound source with a baffle arranged between two sound sources according to some embodiments of the present description; Fig. Figure 6 shows a diagram of the sound loss indices with respect to the dipole sound source with and without the baffle arranged between two sound sources according to some embodiments of the present description; Fig. Figure 7 shows a schematic representation of an open-ear earphone in an exemplary worn state according to some embodiments of the present description; Fig. Figure 8 shows a schematic structural representation of one side of the open-ear earphone facing the ear. Fig. 7; Fig. Figure 9 shows a schematic structural representation of the housing of the open-ear earphone made of Fig. 7; Fig. Figure 10 shows a schematic representation of an exemplary distribution of the dipole sound source with a chamber structure arranged around one of the sound sources according to some embodiments of the present description; Fig. Figure 11A shows a schematic representation of a principle of hearing in a structure of the dipole sound source and a chamber structure formed around one of the sound sources of the dipole sound source according to some embodiments of the present description; Fig. Figure 11B shows a schematic representation of a sound loss principle in the structure of the dipole sound source and the chamber structure formed around one of the sound sources of the dipole sound source according to some embodiments of the present description; Fig. Figure 12A shows a schematic representation of the chamber structure with two horizontal openings according to some embodiments of the present description; Fig. Figure 12B shows a schematic representation of the chamber structure with two vertical openings according to some embodiments of the present description; Fig. Figure 13 shows a comparison diagram of audibility index curves for chamber structures with two openings or one opening according to some embodiments of the present description; Fig. Figure 14 shows a schematic representation of the open-ear earphone in an exemplary worn state according to some further embodiments of the present application; Fig. Figure 15 shows a schematic structural representation of one side of the open-ear earphone facing the ear. Fig. 14; Fig. Figure 16 shows a schematic representation of a projection of the open-ear earphone in the worn state onto the sagittal plane according to some embodiments of the present description; Fig. Figure 17 shows a schematic structural representation of the housing of the open-ear earphone according to some embodiments of the present description; Fig. Figure 18 shows an isoline diagram of the volume ratio of a front chamber to a rear chamber and of the ratio of the opening area of ​​the sound outlet opening to the opening area of ​​the pressure relief opening according to some embodiments of the present description; Fig. Figure 19 shows a diagram of frequency response curves corresponding to different volume levels at a sound outlet opening according to some embodiments of the present description; Fig. Figure 20 shows a diagram of frequency response curves corresponding to different volume levels at a first pressure relief opening according to some embodiments of the present description; Fig. Figure 21 shows a diagram of frequency response curves corresponding to different volume levels at a second pressure relief opening according to some embodiments of the present description; Fig. Figure 22 shows an exemplary representation of an internal structure of a sound-generating part according to some embodiments of the present description; and Fig. Figure 23 shows an exemplary representation of an internal structure of a converter according to some embodiments of the present description. Detailed descriptions

[0031] To further explain the technical solutions of the embodiments of the present application, the drawings required for describing these embodiments are briefly summarized below. Naturally, the following drawings merely represent some examples or embodiments of the present application, and the person skilled in the art can apply the present application to other similar scenarios without inventive step by referring to these drawings. Unless otherwise indicated or understood from the context, the same reference numerals in the figures refer to the same structures or operations.

[0032] It is understood that the terms "system," "device," "unit," and / or "module," as used herein, are a method for distinguishing between different components, elements, parts, or assemblies at different levels. However, where other words can serve the same purpose, these terms may be substituted.

[0033] As shown in the application and the claims, the terms "a" and / or "the" do not necessarily refer to the singular form, but may also include the plural form unless clearly indicated otherwise in the context. In general, the expressions "comprise" and "contain" only indicate that the specifically identified steps and elements are included, that these steps and elements do not constitute an exclusive list, and that further steps or elements may be included in the method or apparatus.

[0034] In the explanation of this description, it should be understood that the terms "first," "second," "third," and "fourth," etc., serve only for descriptive purposes and do not indicate or suggest the relative importance or number of the technical features concerned. Thus, the features defined as "first," "second," "third," and "fourth" may explicitly or implicitly include at least one of these features. In the explanation of this description, the word "several" refers to at least two, such as two, three, etc., unless expressly defined otherwise.

[0035] In this description, the terms "connect" and "fasten" and the like are to be understood in a broad sense unless expressly stated or defined otherwise. For example, the term "connect" may refer to a permanent, detachable, or one-piece connection, which may be a mechanical or electrical connection; which may be a direct connection or an indirect connection via an intermediate medium, or internal communication between two elements, or an interaction between the two elements, unless expressly defined otherwise. A person competent in the field may understand the specific meaning of the above terms in the description according to the specific circumstances.

[0036] In the present description, a distance between a specific point and a specific line or area may be the shortest distance between the specific point and the specific line or area, unless otherwise specified and defined.

[0037] Fig. Figure 1 shows a schematic representation of an exemplary ear according to some embodiments of the present application. With reference to Fig. 1 The ear 100, which can also be referred to as the auricle, can comprise an external auditory canal 101, a concha 102, a cymba conchae 103, a triangular fossa 104, an antihelix 105, a scapha 106, a helix 107, an earlobe 108, a tragus 109, and a crus helicis 1071. In some embodiments, stability when wearing an acoustic device can be achieved by supporting it with one or more sections of the ear 100. In some embodiments, the external auditory canal 101, the concha 102, the cymba conchae 103, the triangular fossa 104, and other sections have a specific depth and volume in three-dimensional space so that the wearing requirements of the acoustic device can be met. The acoustic device (e.g. an in-ear earphone) can, for example, be worn in the outer ear canal 101.In some embodiments, the acoustic device can be worn using a section of the ear 100 other than the external auditory canal 101. For example, the acoustic device can be worn using a section such as the cymba conchae 103, the fossa triangularis 104, the antihelix 105, the scapha 106, or the helix 107, or a combination of these sections. In some embodiments, the earlobe 108 and other sections of the user's ear can also be used to improve the comfort and security of the acoustic device during wear. By using sections of the ear 100 other than the external auditory canal 101 for wearing the acoustic device and for sound propagation, the user's external auditory canal 101 can be "freed up." When the user wears the acoustic device, the acoustic device can block the external auditory canal 101 (or the external auditory canal 101).The acoustic device, which does not block the outer ear canal 101 (or the ear canal opening) when worn by the user, allows the user to hear both sound from the acoustic device and sound from the environment (e.g., a whistle, bicycle bell, surrounding conversations, audible traffic instructions, etc.), thus reducing the likelihood of a traffic accident. In this description, the acoustic device, which does not block the user's outer ear canal 101 (or the ear canal opening) when worn, can be referred to as an earphone. In some embodiments, the acoustic device can be designed as a structure that adapts to the shape of the ear 100, depending on the ear's shape, to allow the sound-generating part of the acoustic device to be worn in different positions on the ear.If, for example, the acoustic device is an earphone, the earphone may comprise a suspension structure (for example, an ear hook) and a sound-generating part that are physically connected to each other. The suspension structure may conform to the shape of the auricle to direct all or part of the sound-generating part onto an anterior surface of the tragus 109 (for example, an area J enclosed by dashed lines in ). Fig. 1) to arrange. For example, the entire or partial structure of the sound-generating part of the earphone worn by the user may also be in contact with an upper part of the external auditory canal 101 (for example, a section on which one or more of the cymba conchae 103, the fossa triangularis 104, the antihelix 105, the scapha 106, the helix 107, the crus helicis 1071 or the like are located). For example, in the case of the earphone worn by the user, the entire or partial structure of the sound-generating part can be located in a chamber formed by one or more sections (for example, the cavum conchae 102, the cymba conchae 103, the fossa triangularis 104, etc.) of the ear 100, for example, a region M1 including at least the cymba conchae 103 and the fossa triangularis 104 and a region M2 including at least the cavum conchae 102, the two regions being separated by dashed lines in Fig. 1 are included.

[0038] Individual variations may occur among different users, resulting in different ear shapes, sizes, and other dimensions. For the sake of clarity and better understanding, unless otherwise stated, this description primarily uses a standard-shaped and standard-sized ear model as a reference to illustrate how the acoustic devices are worn in various embodiments. Based on standards ANSI S3.36, S3.25, and IEC 60318-7, a simulator with a head including (left and right) ears, such as the GRAS 45BC KEMAR, can be manufactured as a reference for wearing an acoustic device to represent the situations of most users when wearing the device normally.By way of example, the ear serving as a reference may have the following relevant features: The dimension of the auricle on the sagittal plane in one direction of the vertical axis may range from 49.5 mm to 74.3 mm, and the dimension of the auricle on the sagittal plane in one direction of the sagittal axis may range from 36.6 mm to 55 mm. Therefore, expressions such as "worn by the user," "being in the worn state," and "in the worn state" in this application may refer to the acoustic device described in this application being worn on the ear of the aforementioned simulator. Given the individual variations between different users, the structure, shape, size, and thickness of one or more sections of the ear may also exhibit certain differences. To meet the different needs of users, the acoustic device may be designed in a differentiated manner.This differentiated design can manifest itself in the fact that the characteristic parameters of one or more sections of the acoustic device (for example, a sound-generating part, an ear hook, etc., as described below) have values ​​within different ranges in order to adapt to different ears.

[0039] It should be noted that in medicine and anatomy, three fundamental planes of section can be defined for the human body: the sagittal plane, the coronal plane, and the horizontal plane. Three fundamental axes can also be defined: the sagittal axis, the coronal axis, and the vertical axis. The sagittal plane is a plane of section perpendicular to the ground, running in the front-to-back direction of the body, dividing the human body into a left and a right part. The coronal plane is a plane of section perpendicular to the ground, running in the left-to-right direction of the body, dividing the human body into an anterior and a posterior part.The horizontal plane refers to a cross-sectional plane perpendicular to the ground in the top-bottom direction of the body, dividing the human body into an upper and a lower part. Accordingly, the sagittal axis refers to an axis running in the front-back direction of the body and perpendicular to the coronal plane, the coronal axis to an axis running in the left-right direction of the body and perpendicular to the sagittal plane, and the vertical axis to an axis running in the top-bottom direction of the body and perpendicular to the horizontal plane. Furthermore, the expression "front of the ear" as described in this application is intended to be the opposite of the expression "back of the ear," the former referring to a side of the ear facing away from the head and the latter to a side of the ear facing the head.When viewing the ear of the aforementioned simulator in the direction of the coronal axis of the human body, the following results: Fig. 1. Schematic representation of the front contour shown.

[0040] Fig. Figure 2 shows an exemplary structural representation of an earphone according to some embodiments of the present description.

[0041] In some embodiments, the earphone 10 may include, but is not limited to, an air conduction earphone and a bone conduction earphone. The earphone 10 may also be combined with products such as eyeglasses, a headset, a head-mounted display, an AR / VR headset, or the like.

[0042] As in Fig. As shown in Figure 2, the earphone 10 can comprise a sound generating part 11 and an ear hook 12.

[0043] The sound-generating part 11 can be worn on the user's body, and the sound-generating part 11 can generate a sound for input into the user's ear canal. In some embodiments, the sound-generating part 11 can incorporate a transducer, such as one in Fig. The transducer 116 shown in Figure 22 comprises a housing 111 for receiving the transducer. The housing 111 can be connected to the ear hook 12. The transducer is used to convert an excitation signal, for example, an electrical signal, into a corresponding mechanical vibration and thus generate the sound. In some embodiments, a sound outlet opening 112 is provided on an inner surface of the housing facing the auricle. The sound outlet opening 112 is used to direct sound generated by the transducer out of the housing 111 and then transmit it to the ear canal so that the user can hear the sound. In some embodiments, the housing 111 can be extended through the transducer (for example, the diaphragm) into a front chamber (for example, the one shown in Figure 22). Fig. The front chamber 114 (shown in Figure 22) and a rear chamber of the earphone are separated. The sound outlet 112 can communicate with the front chamber to draw the sound generated in the front chamber out of the housing 111 and transmit it to the ear canal. In some embodiments, some of the sound drawn out via the sound outlet 112 can propagate to the ear canal so that the user can hear the sound, and another part of it, along with the sound reflected at the ear canal, can propagate out of the earphone 10 and the ear through a gap between the sound-generating part 11 and the ear (for example, a part of the cavum conchae not covered by the sound-generating part 11), resulting in a first loss of sound in the far field.In addition, one or more pressure relief openings 113 (for example, a first pressure relief opening 1131) are generally provided on another side (for example, a side away from or facing away from the user's ear canal) of the housing 111. The pressure relief opening 113 is located further away from the ear canal than the sound outlet opening 112. For the sound propagated from the pressure relief opening 113, a second sound loss generally occurs in the far field, the magnitude of the first sound loss being comparable to the magnitude of the second sound loss, and the phase of the first sound loss and the phase of the second sound loss being (almost) out of phase, so that the two can cancel each other out in the far field, thus contributing to the reduction of the far-field sound loss of the earphone 10.In some embodiments, at least two pressure relief openings 113 can be provided on a different side of the housing 111 than the side facing the ear. Providing these at least two pressure relief openings 113 makes it possible not only to dissipate the sound generated in the rear chamber from the housing 111, but also to disrupt a high-pressure zone of a sound field in the rear chamber. This shortens the wavelength of a standing wave in the rear chamber, resulting in the sound dissipated from the housing 111 through the pressure relief openings 113 having the highest possible resonance frequency, for example, higher than 4 kHz.In this way, the sound emitted through the sound outlet opening 112 and the sound emitted through the pressure relief openings 113 can maintain good agreement over a wider frequency range, so that the two interfere and cancel each other out better in the far field, thus achieving a better effect in reducing sound loss. To facilitate the description, the present description is illustrated using the example of a sound-generating part 11 with two pressure relief openings. For illustrative purposes only, the at least two pressure relief openings 113 can be a first pressure relief opening and a second pressure relief opening, such as the first pressure relief opening 1131 and the second pressure relief opening 1132 in [reference missing]. Fig. 7 or Fig. 14. The two pressure relief openings 113 can each be located on opposite sides of the housing 111. They are arranged, for example, facing away from each other in a subsequent direction Y along a short axis, in order to maximally disrupt the high-pressure zone of the sound field in the rear chamber. Simply put, the user wearing the earphone 10 primarily hears sound transmitted to the ear canal through the sound outlet opening 112. The pressure relief opening 113 is primarily intended to equalize the pressure in the rear chamber, thus enabling sufficient vibration at a large amplitude and low frequency. This results in the sound having a tone quality with deep bass extension and penetrating treble, and reduces sound escaping into the environment through the sound outlet opening 112.For further explanations of the sound generation part 11, reference is made to the other parts of this description, for example to . Fig. 7, Fig. 14, Fig. 22 etc. and their explanations.

[0044] One end of the ear hook 12 can be connected to the sound-generating part 11, while its other end extends along a connection area between the user's ear and head. In some embodiments, the ear hook 12 can be designed as an arc-shaped structure to fit the user's ear, allowing the ear hook 12 to hang on the user's ear. For example, the ear hook 12 can have an arc-shaped structure that fits the connection area between the user's head and ear. This allows the ear hook 12 to hang between the ear and the user's head. In some embodiments, the ear hook 12 can also be designed as a clamping structure that fits the user's ear, allowing the ear hook 12 to be clamped onto the user's ear. For example, the ear hook 12 can have a hook part (a first part 121, as in Fig. 7 shown) and a connecting part (a second part 122, as in Fig. (7 shown) comprise parts that are connected sequentially. The connecting part links the hook part to the sound-generating part 11, so that the earphone 10, in its unworn state (i.e., in its natural state), is arc-shaped in three-dimensional space. In other words, in three-dimensional space, the hook part, the connecting part, and the sound-generating part 11 are not coplanar. Therefore, when the earphone 10 is worn, the hook part is primarily used to hang between the back of the ear and the user's head, and the sound-generating part 11 is primarily used to make contact with the front of the user's ear, which in turn allows the sound-generating part 11 to interact with the hook part to clamp the ear.As an example, the connecting part can extend from the head so that it interacts with the hook part to provide a pressing force on the front of the ear for the sound-generating part 11. Under the influence of this pressing force, the sound-generating part 11 can, in particular, rest against an area where a section such as the cavum conchae 102, the cymba conchae 103, the fossa triangularis 104, the antihelix 105, or the like is located, so that the earphone 10, when worn, does not cover the external auditory canal 101 of the ear.

[0045] To improve the stability of the earphone 10 when worn, one of the following possibilities or a combination thereof can be used for the earphone 10 in some embodiments. First: The ear hook 12 is designed, at least partially, as a profiled structure that conforms to at least one of the back surfaces of the ear 100 and the head in order to increase the contact area of ​​the ear hook 12 with the ear 100 and / or the head, thereby increasing the resistance to the earphone 10 falling out of the ear 100. Second: The ear hook 12 is designed, at least partially, as an elastic structure so that it exhibits a certain degree of deformability when worn, in order to increase the positive pressure of the ear hook 12 on the ear and / or the head, thereby increasing the resistance to the earphone 10 falling out of the ear.Third: The ear hook 12 is at least partially designed so that, when worn, it presses against the head, thereby creating a counterforce that presses against the ear. In this way, the sound-generating element 11 is pressed against the front of the ear to increase the resistance against the earphone 10 falling out of the ear. Fourth: The sound-generating element 11 and the ear hook 12 are designed so that, when worn, they each clamp the antihelix, the concha, etc., from the front and back of the ear, respectively, to increase the resistance against the earphone 10 falling out of the ear. Fifth: The sound-generating part 11 or an associated auxiliary structure is arranged so that it protrudes at least partially into chambers such as the cavum conchae, the cymba conchae, the fossa triangularis or the scapha in order to increase the resistance against the earphone 10 falling out of the ear.

[0046] In some embodiments, the ear hook 12 may, but is not limited to, comprise an ear hook, an elastic band, or the like, in order to better secure the earphone 10 to the user's body and thus prevent it from falling out during use. In some embodiments, the earphone 10 may not include an ear hook 12, and the sound-generating part 11 may be attached by hanging or clamping near the user's ear 100.

[0047] In some embodiments, the sound-generating part 11 can, for example, have a regular or irregular shape, such as an annular, oval, track-shaped, polygonal, U-shaped, V-shaped, or semicircular shape, so that the sound-generating part 11 can hang directly on and rest against the user's ear 100. In some embodiments, the sound-generating part 11 can have a long-axis direction X and a short-axis direction Y that are perpendicular to the thickness direction Z and orthogonal to each other. The long-axis direction X can be defined as a direction in which a section of the shape of the two-dimensional projection surface of the sound-generating part 11 (e.g.,a projection of the sound-generating part 11 onto a plane in which its outer surface is located, or onto the sagittal plane) with maximum extent, wherein, for example, the direction of the long axis corresponds to the longitudinal direction of a rectangular shape or an approximately rectangular shape if the projection is also rectangular or approximately rectangular. The direction Y of the short axis can be defined as a direction in which a portion of the shape of the projection of the sound-generating part 11 onto the sagittal plane extends perpendicular to the direction X of the long axis, wherein, for example, the direction of the short axis corresponds to the latitude direction of a rectangular shape or an approximately rectangular shape if the projection is also rectangular or approximately rectangular.The thickness direction Z can be defined such that it runs perpendicular to the two-dimensional projection surface and, for example, points to the left and right parts of the body respectively, in accordance with the direction of the coronal axis.

[0048] In some embodiments, the sound-generating element 11 of the user-worn earphone 10 is positioned near the user's external auditory canal 101 without obstructing it. In some embodiments, the projection of the earphone 10 onto the sagittal plane, when worn, does not cover the user's auditory canal. For example, the projection of the sound-generating element 11 onto the sagittal plane can fall to either side of the head and be positioned (as in the one shown in the illustration) Fig. 2 (position represented by a solid block A) in front of the tragus along the sagittal axis of the human body. Here, the sound-generating part 11 is located in front of the user's tragus, and the long axis of the sound-generating part 11 can be in a vertical or near-vertical position. Furthermore, the projection of the Y direction of the short axis onto the sagittal plane corresponds to the direction of the sagittal axis, the projection of the X direction of the long axis onto the sagittal plane corresponds to the direction of the vertical axis, and the thickness direction Z is perpendicular to the sagittal plane. As another example, the projection of the sound-generating part 11 onto the sagittal plane can be into the antihelix 105 (as in Fig. 2 (location shown by a dashed block C). In this configuration, the sound-generating element 11 is located at least partially on the antihelix 105, and the long axis of the sound-generating element 11 is in a horizontal or nearly horizontal position. Furthermore, the projection of direction X of the long axis of the sound-generating element 11 onto the sagittal plane corresponds to the direction of the sagittal axis, the projection of direction Y of the short axis onto the sagittal plane corresponds to the direction of the vertical axis, and the thickness direction Z is perpendicular to the sagittal plane. This prevents the sound-generating element 11 from covering the ear canal, thus freeing both of the user's ears. Additionally, the contact area between the sound-generating element 11 and the ear 100 can be increased, further improving the wearing comfort of the earphone 10.

[0049] In some embodiments, it is provided that, when worn, the projection of the earphone 10 onto the sagittal plane can cover, or at least partially cover, the user's ear canal. For example, the projection of the sound-generating part 11 onto the sagittal plane can extend into the cavum conchae 102 (as in the Fig. 2 (point shown by the dashed block B) and is in contact with the crus helicis 1071 and / or the helix 107. Here, the sound-generating part 11 is located at least partially within the cavum conchae 102 and is in an oblique position. Furthermore, a specific angle can be formed by the projection of the direction Y of the short axis of the sound-generating part 11 onto the sagittal plane and the direction of the sagittal axis; that is, the direction Y of the short axis is also obliquely oriented. Similarly, a specific angle can be formed by the projection of the direction X of the long axis onto the sagittal plane and the direction of the sagittal axis; that is, the direction X of the long axis is also obliquely oriented. The thickness direction Z is also perpendicular to the sagittal plane.The conchae 102 has a certain volume and depth, creating a certain distance between the inner surface IS of the earphone 10 and the conchae. The ear canal can communicate with the outside environment through the gap between the inner surface IS and the conchae, thus allowing the user's ears to be exposed. Simultaneously, the sound-generating element 11, together with the conchae, can form an auxiliary chamber, such as the chamber structure described below, which communicates with the ear canal. In some embodiments, the sound outlet 112 can be located at least partially within this auxiliary chamber. The sound emitted through the sound outlet 112 can be limited by the auxiliary chamber; that is, the auxiliary chamber can focus the sound.This allows more sound to be transmitted into the outer ear canal, thus improving the volume and sound quality of the sound heard by the user in the near field, which contributes to improving the acoustic performance of the earphone 10.

[0050] The description of the above earphone 10 serves only for illustrative purposes and is not intended to limit the scope of this application. Various changes and modifications can be made by the person skilled in the art, as described in this application. For example, the earphone 10 may further include a battery arrangement, a Bluetooth arrangement, and the like, as well as a combination thereof. The battery arrangement may be used to power the earphone 10. The Bluetooth arrangement may be used to wirelessly connect the earphone 10 to another device, such as a mobile phone, a computer, or the like. These changes and modifications fall within the scope of protection of this application.

[0051] Fig. Figure 3 shows a schematic representation of two point sound sources and a listening position according to some embodiments of the present description. In conjunction with Fig. In some embodiments, it is provided that sound can be transmitted from the earphone 10 through the sound outlet opening 112, which can be considered a single-pole sound source (or point sound source) A for generating a first sound. Sound can be transmitted from the earphone 10 through the pressure relief opening 113, which can be considered a single-pole sound source (or point sound source) B for generating a second sound. The second sound can be out of phase or nearly out of phase with the first sound, so that they can cancel each other out in the far field, thus forming an "acoustic dipole" to reduce sound loss. In some embodiments, a connecting line between the two single-pole sound sources can be directed towards the ear canal (referred to as the "listening position") when the earphones are worn, so that the user can hear a sound at a sufficient volume.The magnitude of a sound pressure (referred to as Pear) at the listening position can serve to characterize the loudness heard by the user (i.e., a sound pressure when listening in the near field). Furthermore, it is provided that the magnitude of the sound pressure (referred to as Pfar) is measured on a spherical surface centered on the center of the user's listening position, or on a surface centered on the center of a dipole sound source (as shown in A and B in Figure 1). Fig. 3) centered spherical surface with radius r, where the magnitude of the sound pressure can serve to characterize the strength of the sound loss radiated into the far field (i.e., the sound pressure of the sound loss in the far field) of the earphone 10. Pfar can be determined by various statistical methods, for example, by calculating the average value of the sound pressure at different points on the spherical surface or, for example, by area integration of the sound pressure distribution at different points on the spherical surface.

[0052] It should be noted that the method for measuring sound loss in this description serves merely as an example of the principle and its effect, and is not intended as a limitation. The method for measuring and calculating sound loss can be appropriately adapted to the actual circumstances. In the far field, for example, the sound pressure amplitudes of two or more points, evenly distributed within a specific solid angle, are averaged centered on the center of the dipole sound source. In some embodiments, the measurement can be performed by selecting a point near the point sound source as the listening position, and the sound pressure amplitude determined at this listening position is then referred to as the value of the listening position. In some embodiments, the listening position may or may not lie on the line connecting the two point sound sources.The measurement and calculation method for listening can also be appropriately adapted to the actual conditions. For example, the sound pressure amplitudes from other points or from more than one point in the near field are averaged. In the near field, the sound pressure amplitudes from two or more than two points, evenly distributed within a specific solid angle, are also averaged, centered on a specific point sound source. In some embodiments, the distance between the listening position in the near field and the point sound source can be smaller than the distance between the point sound source and the spherical surface when measuring sound loss in the far field.

[0053] Naturally, the sound pressure Pear transmitted from the earphone 10 to the user's ear should be sufficiently high to enhance audibility. Furthermore, the sound pressure Pfar in the far field should be sufficiently low to increase the effectiveness in reducing sound loss. Therefore, a sound loss index α can serve as a measure for evaluating the earphone 10's ability to reduce sound loss. α=|Pfar|2|Pear|2.

[0054] Formula (1) shows that the earphone's ability to reduce sound loss increases with the lower its sound loss index. At the same volume levels when listening in near-field positions, sound loss in the far field is always lower.

[0055] Fig. Figure 4 shows a comparison diagram of the sound loss indices for a single-point sound source and a double-point sound source at various frequencies according to some embodiments of the present description. The in Fig. Figure 4, a double-point sound source shown, which can also be called a dipole sound source, can represent a typical double-point sound source where the distance between them remains constant, the amplitude of the two point sound sources is the same, and the phases of the two point sound sources are out of phase. It is understood that the typical double-point sound source is used only to describe the principle and effect, and the parameters of the individual point sound sources can be adjusted as needed to differ from the typical double-point sound source. As shown in Fig. As shown in Figure 4, at a constant distance, the sound loss caused by the colony-point sound source increases with increasing frequency, while the ability to reduce sound loss decreases with increasing frequency. When the frequency exceeds a certain value (e.g., approximately 8000 Hz, as in Figure 4), the sound loss decreases with increasing frequency. Fig. (as shown in Figure 4), the resulting sound loss is greater than with a single point sound source. Therefore, this frequency (e.g., 8000 Hz) represents the upper limit to which the sound loss of the double point sound source can be reduced.

[0056] In some embodiments, a sound baffle can be arranged between the sound outlet opening 112 and the pressure relief opening 113 in order to improve the acoustic emission of the earphone 10, i.e. to increase the strength of the sound in a listening position in the near field, and at the same time to reduce the volume of sound loss in the far field.

[0057] Fig. Figure 5 shows a schematic representation of an exemplary distribution for a dipole sound source with a baffle arranged between two sound sources, according to some embodiments described in this document. As in Fig. As shown in Figure 5, a baffle is provided between point sound source A1 and point sound source A2. The sound wave from point sound source A2 must first pass by the baffle in the near field before it can interfere with the sound wave from point sound source A1 at the listening position. This corresponds to an increase in the interval between point sound source A2 and the listening position. Therefore, it is assumed that point sound sources A1 and A2 have the same amplitude. Compared to a case without a baffle, the amplitude difference of the sound waves from point sound source A1 and point sound source A2 at the listening position then increases, thereby reducing the mutual cancellation of the sound from both sources at the listening position and thus increasing the loudness at the listening position.Compared to the case without a baffle, the sound loss in the far field cannot be significantly increased because the sound waves generated by point sound sources A1 and A2 can interfere with each other over a large area in the far field without passing through the baffle, similar to the case without a baffle. Therefore, by incorporating a baffle structure around point sound sources A1 and A2, the volume at the listening position in the near field can be significantly improved without substantially increasing the sound loss in the far field.

[0058] Fig. Figure 6 shows a diagram of the sound loss indices for the dipole sound source with and without the baffle arranged between two sound sources, according to some embodiments described in this document. A baffle is added between the two point sound sources. This means that the distance between the two point sound sources in the near field is increased, that the loudness at the listening position in the near field is generated by a point sound source at a greater distance, and that the perceived loudness in the near field is significantly increased compared to the case without a baffle. In the far field, the sound field of the two point sound sources is only slightly affected by the baffle. This means that the sound loss is generated by a point sound source at a short distance. As shown in Fig. As shown in Figure 6, the sound loss index after adding the baffle is therefore significantly lower than without the baffle, i.e., at the same listening volume, the sound loss in the far field is lower than without the baffle, thus significantly improving the ability to reduce sound loss.

[0059] Fig. Figure 7 shows a schematic representation of the earphone in an exemplary worn state according to some embodiments of the present description. Fig. Figure 8 shows a schematic structural representation of one side of the earphone facing the ear. Fig. 7. Fig. Figure 9 shows a schematic structural representation of the housing of the earphone made of Fig. 7.

[0060] As in Fig. As shown in Figure 7, the ear hook 12 is designed as an arc-shaped structure that rests against the connection area between the head and the ear 100 of the user. The sound-generating part 11 (or the housing 111 of the sound-generating part 11) can have a connecting end CE that is connected to the ear hook 12 and a free end FE that is not connected to the ear hook 12. When the earphone 10 is worn, the first part 121 of the ear hook 12 (for example, the hook part of the ear hook 12) is suspended between the auricle (for example, the helix 107) and the head of a user, while the second part 122 of the ear hook 12 (for example, the connecting part of the ear hook) extends towards a side of the auricle facing away from the head and is connected to the connecting end CE of the sound-generating part 11 in order to carry the sound-generating part 11 at a location near the ear canal without blocking the ear canal.

[0061] As in connection with Fig. 7 and Fig. As shown in Figure 8, the sound-generating part 11, when worn, can have, in the thickness direction Z, an inner surface IS facing the ear (also referred to as the inner surface of the housing 111), an outer surface OS facing away from the ear (also referred to as the outer surface of the housing 111), and a connecting surface linking the inner surface IS and the outer surface OS. It should be noted that, when worn and viewed in the direction of the coronal axis (i.e., in the thickness direction Z), the sound-generating part 11 can be in the shape of a circle, an oval, a rounded square, a rounded rectangle, etc. If the sound-generating part 11 is in the shape of a circle, an oval, etc., the connecting surface can refer to an arcuate side of the sound-generating part 11.If the sound-generating part 11 is shaped like a rounded square, a rounded rectangle, or in another shape, the connecting surface above can comprise a bottom surface LS (also referred to as the bottom of the housing 111), a top surface US (also referred to as the top of the housing 111), and a back surface RS (also referred to as the back of the housing 111), as described below. The top surface US and the bottom surface LS each refer to a side of the sound-generating part 11 facing away from the external auditory canal 101 and a side of the external auditory canal 101 located near it, respectively, in the Y direction of the short axis when worn. The back surface RS can be a side of the sound-generating part 11 facing the back of the head in the X direction when worn.To facilitate the description, the present description is exemplified using a sound-generating element 11 in the form of a rounded rectangle. The length of the sound-generating element 11 in the X direction of the long axis can be greater than the width of the sound-generating element 11 in the Y direction of the short axis. In some embodiments, the rear surface RS of the earphone can be shaped as an arc to improve the aesthetics and wearing comfort of the earphone.

[0062] Within the sound-generating part 11, the transducer can be arranged, which converts an electrical signal into a corresponding mechanical vibration, thereby generating sound. The transducer (for example, the diaphragm) can divide the housing 111 into the front chamber and the rear chamber of the earphone. The sound generated in the front chamber is out of phase with the sound generated in the rear chamber. A sound outlet opening 112 is provided on the inner surface IS to direct sound generated by the front chamber out of the housing 111 and then transmit it to the ear canal so that the user can hear the sound.On another side (for example, the outer surface OS, the top surface US, or the bottom surface LS, or the like) of the housing 111, one or more pressure relief openings 113 can be configured to communicate with the rear chamber so that sound generated in the rear chamber and derived from the housing 111, and sound emerging from the sound outlet opening 112, interfere with and cancel each other out in the far field. In some embodiments, the pressure relief opening 113 is arranged further away from the ear canal than the sound outlet opening 112 in order to attenuate the out-of-phase cancellation between sound emitted through the pressure relief opening 113 and sound emitted through the sound outlet opening 112 at a listening position (for example, the ear canal), and thus increase the loudness of the sound at the listening position.

[0063] In some embodiments, at least two pressure relief openings 113 may be provided on a side other than the inside IS of the housing 111 (for example, the outer side OS, the top side US, or the bottom side LS, or the like). By providing the at least two pressure relief openings 113, the standing wave in the rear chamber can be disrupted, so that the sound discharged from the housing 111 through the pressure relief openings 113 has the highest possible resonance frequency. This results in a broad and flat frequency response in the rear chamber (for example, a region before the resonance peak) and provides better sound loss reduction in the mid and high frequency range (for example, 2 kHz to 6 kHz).By way of example only, the pressure relief opening 113 can comprise a first pressure relief opening 1131 and a second pressure relief opening 1132. The second pressure relief opening 1132 can be located closer to the sound outlet opening 112 than the first pressure relief opening 1131. In some embodiments, the first pressure relief opening 1131 and the second pressure relief opening 1132 can be located on the same side of the housing 111. For example, the first pressure relief opening 1131 and the second pressure relief opening 1132 can be located simultaneously on the outer surface OS, the top surface US, or the bottom surface LS. In some embodiments, the first pressure relief opening 1131 and the second pressure relief opening 1132 can be located on two different sides of the housing 111.For example, the first pressure relief opening 1131 can be located on the outer surface OS and the second pressure relief opening 1132 on the upper surface US, or the first pressure relief opening 1131 on the outer surface OS and the second pressure relief opening 1132 on the lower surface LS. To maximize the destruction of the standing wave in the rear chamber, some embodiments provide for the two pressure relief openings 113 to be located on opposite sides of the housing 111. For example, the first pressure relief opening 1131 can be located on the upper surface US and the second pressure relief opening 1132 on the lower surface LS. To facilitate the description, the present description is based on an example arrangement in which the first pressure relief opening 1131 is located on the upper surface US and the second pressure relief opening 1132 on the lower surface LS.

[0064] To avoid the influence of the sound emitted through the first pressure relief opening 1131 and the second pressure relief opening 1132 on the loudness of the sound emitted through the sound outlet opening 112 at the listening position, some embodiments provide that the first pressure relief opening 1131 and the second pressure relief opening 1132 should be arranged as far away as possible from the sound outlet opening 112. For example, it is possible for the center of the sound outlet opening 112 to be located on a perpendicular plane or near the perpendicular plane of a line connecting the center of the first pressure relief opening 1131 with the center of the second pressure relief opening 1132.In some embodiments, the distance between the center of the sound outlet opening 112 and the perpendicular plane of the line connecting the center of the first pressure relief opening 1131 with the center of the second pressure relief opening 1132 can be 0 mm to 2 mm. To further prevent the out-of-phase cancellation of the sound emitted through the second pressure relief opening 1132 and the sound emitted through the sound outlet opening 112 in the ear canal (i.e., at the listening position), thus reducing the perceived loudness, some embodiments provide that the area of ​​the second pressure relief opening 1132 can be reduced. This reduces the intensity of the sound diverted through the second pressure relief opening 1132 and transmitted to the ear canal, whereby the area of ​​the second pressure relief opening 1132 can be smaller than the area of ​​the first pressure relief opening 1131 (as in [reference]). Fig. 17 shown).

[0065] As in Fig. As shown in Figure 7, in some embodiments the direction X of the long axis of the sound-generating part 11 is arranged horizontally or almost horizontally when the earphone 10 is worn (similar to point C shown in Figure 7). Fig. 2) wherein the sound-generating part 11 is located at least partially on the antihelix 105 and the free end FE of the sound-generating part 11 may face the back of the head. The sound-generating part 11 is in a horizontal or nearly horizontal position. In addition, the projection of direction X of the long axis of the sound-generating part 11 onto the sagittal plane may correspond to the direction of the sagittal axis, the projection of direction Y of the short axis onto the sagittal plane may correspond to the direction of the vertical axis, and the thickness direction Z is perpendicular to the sagittal plane.

[0066] In order to increase the fit of the earphone 10 to the ear 100 and the stability for wearing the earphone 10, in some embodiments it is provided that the inner surface IS of the housing 111 can rest against a surface of the ear 100 (for example the antihelix 105) in order to increase resistance against the earphone 10 falling out of the ear 100.

[0067] Combined with Fig. 7 and Fig. In some embodiments, it is provided that when the earphone 10 is placed on the ear 100, the projection of the sound outlet 112 onto the sagittal plane and the projection of an inwardly concave structure (for example, the cymba conchae 103) of the ear onto the sagittal plane can partially or completely coincide, so that the sound outlet 112 on the inner surface IS is not covered by ear tissue. Since the cymba conchae 103 communicates with the cavum conchae 102 and the ear canal is located within the cavum conchae 102, some embodiments provide that if the projection of the sound outlet 112 onto the sagittal plane lies at least partially within the cymba conchae 103, the sound emitted through the sound outlet 112 can reach the ear canal unhindered, thus increasing the volume received by the ear canal.In some embodiments, the dimension of the long axis of the sound-generating part 11 should not be too long, since an excessive length would cause the projection of the free end FE onto the sagittal plane to extend beyond the projection of the ear onto the sagittal plane, thereby impairing the impedance matching between the sound-generating part 11 and the ear. Therefore, the dimension of the long axis of the sound-generating part 11 can be designed such that the projection of the free end FE onto the sagittal plane does not extend beyond the projection of the helix 107 onto the sagittal plane.

[0068] It can be seen that the respective side walls of the housing 111 have a certain thickness because the sound outlet opening 112 and the pressure relief openings 113 (for example, the first pressure relief opening 1131 and the second pressure relief opening 1132) are provided on the housing 111. Thus, the sound outlet opening 112 and the pressure relief openings 113 are holes with a certain depth. In this case, the sound outlet opening 112 and the pressure relief opening 113 can each have inner and outer openings. To facilitate the description, the present application provides that the above or following center O of the sound outlet opening 112 can be the centroid of an outer opening of the sound outlet opening 112, and that the above or followingThe following centers of the pressure relief openings 113 may be the centroids of outer openings of the pressure relief openings 113. For example, the center O1 of the first pressure relief opening 1131 may be the centroid of an outer opening of the first pressure relief opening 1131, and the center O2 of the second pressure relief opening 1132 may be the centroid of an outer opening of the second pressure relief opening 1132.To facilitate the description, it is provided in the present description that the surfaces of the sound outlet opening 112 and the pressure relief openings 113 (for example, the first pressure relief opening 1131 and / or the second pressure relief opening 1132) can be the surfaces of the outer openings of the sound outlet opening 112 and the pressure relief openings 113, for example, the surface of the outer opening of the sound outlet opening 112 on the inside IS, the surface of the outer opening of the first pressure relief opening 1131 on the top US and the surface of the outer opening of the second pressure relief opening 1132 on the bottom LS.It can be seen that in some embodiments it is provided that the areas of the sound outlet opening 112 and the pressure relief openings 113 can also be other cross-sectional areas of the sound outlet opening 112 and the pressure relief openings 113, for example the areas of inner openings of the sound outlet opening 112 and / or the pressure relief openings 113 or an average value of the areas of the inner openings and the outer openings of the sound outlet opening 112 and / or the pressure relief openings 113 or the like.

[0069] In some embodiments, the sound outlet opening 112, which communicates with the front chamber, is provided as the one in Fig. The point sound source A1 shown in Figure 5 can be considered to be that the pressure relief openings 113 (for example, the first pressure relief opening 1131 and / or the second pressure relief opening 1132), which are in communication with the rear chamber, are as shown in Figure 5. Fig. The point sound source A2 shown in section 5 can be considered, and the ear canal can be seen as the source in the image. Fig. The listening position shown in Figure 5 can be considered. At least part of the housing of the sound-generating part 11 and / or at least part of the auricle can be considered as shown in Figure 5. Fig. The baffle shown in section 5 is considered to increase the difference in the interval between the sound outlet opening 112 and the first pressure relief opening 1131 and / or the second pressure relief opening 1132 to the ear canal, thereby increasing the sound intensity at the ear canal while maintaining the effect of reducing sound loss in the far field. If the earphone 10 is structurally as shown in Fig. As shown in Figure 7, i.e., the housing 111 is located at least partially on the antihelix 105, the sound wave from the sound outlet 112 can directly reach the ear canal with respect to its audible effect. The sound outlet 112 can be located in a position close to the underside LS on the inner side IS, and at least one of the pressure relief openings can be located in a position away from the sound outlet 112. For example, the first pressure relief opening 1131 can be located on the outer side OS or the upper side US, away from the sound outlet 112. The sound wave from the first pressure relief opening 1131 must pass by the outer side of the sound-generating part 11 in order to then interfere with the sound wave from the sound outlet 112 in the ear canal. Furthermore, convex or concave structures (e.g., the antihelix, the tragus, etc.) can...(along the propagation path) at the auricle, the interval for the transmission of sound from the first pressure relief opening 1131 to the ear canal is also increased. Thus, the sound-generating part 11 itself and / or at least a part of the auricle correspond to the sound baffle between the sound outlet opening 112 and the first pressure relief opening 1131. The sound baffle increases the interval from the first pressure relief opening 1131 to the ear canal and reduces the intensity of the sound wave emitted through the first pressure relief opening 1131 at the ear canal, so that the cancellation of the sound emitted through the sound outlet opening 112 and the first pressure relief opening 1131 at the ear canal is reduced, and thus the volume at the ear canal is increased.Regarding the effect of sound loss, the sound loss cannot be significantly increased because the sound waves generated by the sound outlet opening 112 and the first pressure relief opening 1131 and / or the second pressure relief opening 1132 can interfere with each other over a large area without passing by the sound-generating part 11 itself, similar to the case without a baffle. By arranging the sound outlet opening 112 and the first pressure relief opening 1131 and the second pressure relief opening 1132 in suitable positions, the volume at the ear canal can be considerably increased without significantly increasing the volume of sound loss.

[0070] In some embodiments, to facilitate production, the first pressure relief opening 1131 and the second pressure relief opening 1132 are provided with respect to the median plane of the long axis of the sound-generating part 11 (for example, as in Fig. The plane NN' (shown in Figure 8, which is oriented perpendicularly inwards to the drawing plane) can be distributed almost symmetrically if the projection of the free end FE onto the sagittal plane does not extend beyond the projection of the helix 107 onto the sagittal plane. In some embodiments, the difference in distance a2 between the center O2 of the second pressure relief opening 1132 on the underside LS and the rear side RS from the distance a1 between the center O1 of the first pressure relief opening 1131 on the top side US and the rear side RS is less than 10%. In some embodiments, the difference in distance a2 between the center O2 of the second pressure relief opening 1132 on the underside LS and the rear side RS from the distance a1 between the center O1 of the first pressure relief opening 1131 on the top side US and the rear side RS is less than 5%.In some embodiments, the difference in distance a2 between the center O2 of the second pressure relief opening 1132 on the underside LS and the rear surface RS, and the difference in distance a1 between the center O1 of the first pressure relief opening 1131 on the top side US and the rear surface RS, is less than 2%. It can be seen that in some embodiments, the rear surface RS of the earphone may be shaped as an arc to improve the aesthetics and wearing comfort of the earphone. If the rear surface RS is shaped as an arc, the distance between a position (for example, the center O1 of the first pressure relief opening 1131) and the rear surface RS may be the distance between that position and the tangential surface of the rear surface RS, which runs parallel to the short axis.

[0071] In some embodiments, the sound outlet opening 112 is positioned close to the ear canal, allowing the second pressure relief opening 1132 on the underside LS to be located as far away as possible from the sound outlet opening 112. This is intended to dampen the cancellation effect of the sound emitted through the second pressure relief opening 1132 and the sound emitted through the sound outlet opening 112 at the listening position (i.e., the ear canal), thus increasing the volume at the listening position. If the sound outlet opening 112 is located near the underside LS and the connecting end CE, the second pressure relief opening 1132 can therefore be located near the rear side RS, maximizing the distance between the sound outlet opening 112 and the second pressure relief opening 1132.In some embodiments, the distance a2 between the center O2 of the second pressure relief opening 1132 and the rear side RS can range from 8.60 mm to 20.27 mm if the projection of the free end FE onto the sagittal plane does not extend beyond the projection of the helix 107 onto the sagittal plane. In some embodiments, the distance a2 between the center O2 of the second pressure relief opening 1132 and the rear side RS can range from 8.60 mm to 12.92 mm. In some embodiments, the distance a2 between the center O2 of the second pressure relief opening 1132 and the rear side RS can range from 9.60 mm to 11.92 mm.In some embodiments, the free end FE of the earphone 10 may be in contact with the ear (for example, the helix 107) when worn, so that the top surface US and / or the bottom surface LS are covered by the ear. To prevent the second pressure relief opening 1132 on the bottom surface LS (or the first pressure relief opening 1131 on the top surface US) from being covered by the ear 100 and thus affecting the acoustic performance of the earphone 10, the distance a2 between the center O2 of the second pressure relief opening 1132 and the rear surface RS can be in the range of 10.10 mm to 11.42 mm. Preferably, the distance a2 between the center O2 of the second pressure relief opening 1132 and the rear surface RS can be in the range of 10.30 mm to 11.12 mm.Preferably, the distance a2 between the center O2 of the second pressure relief opening 1132 and the rear side RS can be in the range of 10.60 mm to 11.82 mm.

[0072] In some embodiments, the distance a1 between the center O1 of the first pressure relief opening 1131 and the rear side RS can range from 8.60 mm to 15.68 mm, provided that the difference between the distance a2 between the center O2 of the second pressure relief opening 1132 and the rear side RS and the distance a1 between the center O1 of the first pressure relief opening 1131 and the rear side RS is less than 10%. In some embodiments, the distance a1 between the center O1 of the first pressure relief opening 1131 and the rear side RS can range from 8.60 mm to 12.92 mm.In some embodiments, the distance a1 between the center O1 of the first pressure relief opening 1131 and the rear surface RS can be in the range of 9.60 mm to 11.92 mm, so that the projection of the first pressure relief opening 1131 onto the sagittal plane and the projection of the inwardly recessed structure of the ear onto the sagittal plane can largely coincide. Preferably, the distance a1 between the center O1 of the first pressure relief opening 1131 and the rear surface RS can be in the range of 10.10 mm to 11.42 mm. More preferably, the distance a1 between the center O1 of the first pressure relief opening 1131 and the rear surface RS can be in the range of 10.30 mm to 11.12 mm. Preferably, the distance a1 between the center O1 of the first pressure relief opening 1131 and the rear side RS can be in the range of 10.60 mm to 11.82 mm.

[0073] In some embodiments, the first pressure relief opening 1131 can be located further away from the sound outlet opening 112 than the second pressure relief opening 1132, and the sound generated by the first pressure relief opening 1131 is more difficult to transmit to the ear canal compared to the second pressure relief opening 1132 because the gap between the ear 100 and the inner surface IS is small. Therefore, in some embodiments, the distance between the center O1 of the first pressure relief opening 1131 and the rear surface RS can be smaller than the distance between the center O2 of the second pressure relief opening 1132 and the rear surface RS.For example, it is provided that the distance between the center O1 of the first pressure relief opening 1131 and the rear RS is in the range of 10.44 mm to 15.68 mm, and that the distance between the center O2 of the second pressure relief opening 1132 and the rear RS is in the range of 13.51 mm to 20.27 mm.

[0074] With reference to Fig. 9, in some embodiments, it is provided that, to increase the interval from the first pressure relief opening 1131 and / or the second pressure relief opening 1132 to the ear canal, the dimension of the earphone 10 in the thickness direction Z can be increased in order to increase the sound generation power of the earphone 10 (i.e., the volume of hearing in the listening position). Furthermore, it is provided that the first pressure relief opening 1131 and / or the second pressure relief opening 1132 can be arranged further away from the inner surface IS in order to further increase the interval from the first pressure relief opening 1131 and / or the second pressure relief opening 1132 to the ear canal and to increase the sound generation power of the earphone 10.Furthermore, the overall dimensions of the sound-generating element 11 cannot be defined as too large; for example, the dimensions of the sound-generating element 11 in the Z-direction should not be too large, otherwise the overall mass of the earphone 10 could be increased, thus affecting wearing comfort. In some embodiments, the distance d1 between the center O1 of the first pressure relief opening 1131 and the inner surface IS is in the range of 4.24 mm to 7.96 mm. In some embodiments, the distance d1 between the center O1 of the first pressure relief opening 1131 and the inner surface IS is in the range of 4.43 mm to 7.96 mm. In some embodiments, the distance d1 between the center O1 of the first pressure relief opening 1131 and the inner surface IS is in the range of 5.43 mm to 6.96 mm.In some embodiments, the first pressure relief opening 1131 and / or the second pressure relief opening 1132 can be positioned far from the inner surface IS when worn. This allows the projection of the first pressure relief opening 1131 onto the horizontal plane to coincide less with, or not coincide at all with, the projection of the ear 100 onto the horizontal plane. This enables the sound emitted through the first pressure relief opening 1131 and / or the second pressure relief opening 1132 to be radiated more outwards, instead of being transmitted to the ear canal or, after reflection or refraction at certain structures (e.g., the auricle) of the ear 100, being transmitted to the ear canal. Such an arrangement also makes it possible to further increase the distance between the first pressure relief opening 1131 and / or the second pressure relief opening 1132 and the ear canal, thereby increasing the sound generation power of the earphone 10.In some embodiments, the distance d1 between the center O1 of the first pressure relief opening 1131 and the inner surface IS is in the range of 5.63 mm to 7.96 mm. In some embodiments, the distance d1 between the center O1 of the first pressure relief opening 1131 and the inner surface IS is in the range of 6.25 mm to 7.56 mm.

[0075] In some embodiments, the distance d2 between the center O2 of the second pressure relief opening 1132 and the inner surface IS can be the same as the distance d1 between the center O1 of the first pressure relief opening 1131 and the inner surface IS. In some embodiments, the distance d2 between the center O2 of the second pressure relief opening 1132 and the inner surface IS is in the range of 4.43 mm to 7.96 mm. In some embodiments, the distance d2 between the center O2 of the second pressure relief opening 1132 and the inner surface IS is in the range of 5.43 mm to 6.96 mm. In some embodiments, the distance d2 between the center O2 of the second pressure relief opening 1132 and the inner surface IS is in the range of 5.63 mm to 7.96 mm.In some embodiments, the distance d2 between the center O2 of the second pressure relief opening 1132 and the inside IS is in the range of 6.25 mm to 7.56 mm.

[0076] In some embodiments, the sound outlet 112 is positioned near the underside LS to bring it closer to the ear canal and thus increase the listening position. In this case, the second pressure relief opening 1132 is located closer to the inner surface IS than the first pressure relief opening 1131. To dampen the effect of the cancellation of sound emitted through the second pressure relief opening 1132 and sound emitted through the first outlet 112 at the listening position (i.e., the ear canal), and thus increase the volume at the listening position, the second pressure relief opening 1132 can be located further away from the inner surface IS than the first pressure relief opening 1131 in the Z-direction.This means that the distance d2 between the center O2 of the second pressure relief opening 1132 and the inner surface IS, and the distance d1 between the center O1 of the first pressure relief opening 1131 and the inner surface IS, can be different. For example, the distance d1 between the center O1 of the first pressure relief opening 1131 and the inner surface IS is specified to be in the range of 5.63 mm to 6.5 mm, and the distance d2 between the center O2 of the second pressure relief opening 1132 and the inner surface IS is specified to be in the range of 6.5 mm to 7.56 mm.

[0077] The description of the above earphone 10 serves only for illustrative purposes and is not intended to limit the scope of this application. For the person skilled in the art, various changes and modifications can be made in accordance with the description in this application. For example, if only one pressure relief opening is provided on the sound-generating part 11, the pressure relief opening can be any of the first pressure relief openings 1131 and the second pressure relief openings 1132. For example, the pressure relief opening can be the first pressure relief opening 1131 mentioned above. That is, the pressure relief opening can be provided on the top surface US.It is provided that the distance between the center of the pressure relief opening and the inner surface IS can range from 4.24 mm to 7.96 mm, and that the distance between the center of the pressure relief opening and the rear surface RS can range from 8.60 mm to 15.68 mm. These changes and modifications fall within the scope of protection of the present application.

[0078] In some embodiments, it is provided that a chamber structure can be formed around one of the sound sources of the double-point sound source in order to enable an increase in loudness during listening, particularly in the mid and low frequency range, while simultaneously preserving the effect of cancellation for sound loss in the far field. Fig. Figure 10 shows a schematic representation of an exemplary distribution of the dipole sound source with a chamber structure arranged around one of the sound sources according to some embodiments of the present description.

[0079] As in Fig. As shown in Figure 10, a chamber structure 41 is arranged between the dipole sound sources such that one of the dipole sound sources and the listening position are located inside the chamber structure 41, while the other dipole sound source is located outside the chamber structure 41. Sound emitted by the dipole sound source inside the chamber structure 41 can be limited by the chamber structure 41; that is, the chamber structure 41 can focus the sound. This allows more sound to be transmitted to the listening position, thus improving the volume and sound quality of the sound heard at the listening position.In the present application, the “chamber structure” can be understood as a partially enclosed structure jointly enclosed by the side wall of the sound-generating part 11 and the structure of the cavum conchae, wherein the partially enclosed structure does not completely seal the interior from the external environment, but rather has a leakage structure 42 (for example, an opening, a gap, a tube, or the like) that is in acoustic communication with the external environment. An exemplary leakage structure may comprise, but is not limited to, an opening, a gap, a tube, and the like, or any combination thereof.

[0080] In some embodiments, the chamber structure 41 can contain a listening position and at least one sound source. Here, the term "contains" can mean that either the listening position or the sound source is located inside the chamber, or that either the listening position or the sound source is located at the inner edge of the chamber. In some embodiments, the listening position can also be located at the entrance of the ear canal or at an acoustic reference point of the ear.

[0081] Fig. Figure 11A shows a schematic representation of a principle of hearing in a structure of the dipole sound source and a chamber structure formed around one of the sound sources of the dipole sound source according to some embodiments of the present description. Fig. Figure 11B shows a schematic representation of a sound loss principle in the structure of the dipole sound source and the chamber structure formed around one of the sound sources of the dipole sound source according to some embodiments of the present description.

[0082] Regarding near-field hearing, a dipole of the chamber structure around one of the in Fig. The sound sources shown in Figure 11A are formed around the chamber structure. Because one of the sound sources A is enclosed by the chamber structure, the sound emitted from it mostly reaches the listening position through direct radiation or reflection. In contrast, most of the sound emitted by the other sound source cannot reach the listening position without the chamber structure. Therefore, the chamber structure significantly increases the volume of the sound that reaches the listening position. At the same time, only a small portion of the out-of-phase sound emitted by the out-of-phase sound source B outside the chamber structure enters the chamber structure through the leakage structure. This means that a secondary sound source B' is created at the leakage structure, the intensity of which is significantly lower than that of sound sources A and B.The sound generated by the secondary sound source B' causes a weak antiphase cancellation in the chamber with respect to the sound source A, which significantly increases the volume at the listening position.

[0083] As in Fig. As shown in Figure 11B, with regard to sound loss, it is assumed that the sound radiated from sound source A to the outside environment via the leakage structure of the chamber corresponds to a secondary sound source A' generated at the leakage structure. Since almost all the sound radiated from sound source A is emitted through the leakage structure, and the structural dimension of the chamber is much smaller than the room dimension used for evaluating sound loss (by at least one order of magnitude), it can be assumed that the magnitude of a secondary sound source A' is equal to that of sound source A. For the outside environment, the effect of the cancellation of the sound generated by the secondary sound source A' against the sound generated by sound source B is equivalent to the effect of the cancellation of the sound generated by sound source A against the sound generated by sound source B.This means that the chamber structure retains a comparable effect in reducing sound loss.

[0084] It is understood that the above leakage structure with one opening is only exemplary. The leakage structure of the chamber structure can have one or more openings and also enable an optimal audibility index, where the audibility index can be related to the reciprocal 1 / α of the sound loss index α. Using the example of a structure with two openings, the cases of identical openings and the same opening rate are analyzed below. In comparison to a structure with a single opening, the term "identical openings" here means that two openings whose dimensions are identical to those of the structure with a single opening are provided, while the term "same opening rate" means that the sum of the opening areas of the two openings corresponds to the opening area of ​​the structure with a single opening. The identical openings correspond to a doubling of the relative opening size of the single opening (i.e.,(a doubling of the ratio between the opening area S of the leakage structure of the chamber structure and the area S0, which is directly exposed to the sound source contained within the chamber structure), whereby, according to the description above, the overall audibility index can be reduced. Even with the same opening rate, different distances of the two openings to the external sound source lead to different audibility indices, even if the S / S0 is identical to that of the structure with a single opening.

[0085] Fig. Figure 12A shows a schematic representation of the chamber structure with two horizontal openings according to some embodiments of the present description. Fig. Figure 12B shows a schematic representation of the chamber structure with two vertical openings according to some embodiments described in this document. If two connecting lines between the openings and two connecting lines between the sound sources are parallel to each other (i.e., two horizontal openings), the distances from the two openings to the external sound source are assumed to be their maximum and minimum distances, respectively, as shown in Figure 12B. Fig. Figure 12A shows that if two connecting lines run vertically (i.e., two vertical openings), the distances from the two openings to the external sound source are equal, and an average value is assumed, as shown in Figure 12A. Fig. 12B shown.

[0086] Fig. Figure 13 shows a comparison diagram of audibility index curves for chamber structures with two openings and one opening, respectively, according to some embodiments described in this document. As in Fig. As shown in Figure 13, the overall audibility index is reduced for chamber structures with identical openings compared to a chamber structure with a single opening. For a chamber structure with the same opening rate, the different distances of the two openings to the external sound source also lead to different audibility indices. This is in conjunction with Fig. 12A, Fig. 12B and Fig. 13. It is evident that the audibility index of the leakage structures with the same opening rate is higher than that of the leakage structures with identical openings, regardless of whether the openings are horizontal or vertical. This is because, in the leakage structure with the same opening rate, the relative opening size S / S0 is reduced by half compared to the leakage structure with identical openings, thus increasing the audibility index. This is in conjunction with Fig. 12A, Fig. 12B and Fig. 13. It is also evident that the audibility index is higher for horizontal openings, regardless of whether the leakage structure has identical openings or the same opening rate. This is because, in the leakage structure with horizontal openings, the distance of one of the openings to the external sound source is smaller than the distance between the two sound sources. As a result, the secondary sound source and the external sound source are closer together than the two original sound sources. Therefore, the audibility index is higher, and the effect on reducing sound loss is further improved. To improve the effect on reducing sound loss, the distance of at least one opening to the external sound source can therefore be smaller than the distance between the two sound sources.

[0087] As in Fig. As shown in Figure 13, it is further intended that the air acoustic resonance frequency within the chamber structure can be increased more effectively by a chamber structure with two openings than by a chamber structure with a single opening, so that the entire device exhibits a better audibility index in a high-frequency band (for example, sound with a frequency close to 10,000 Hz) than a chamber structure with only one opening. The human ear is more sensitive to the high-frequency band, therefore there is a greater need to reduce sound loss in this band. To improve the effectiveness in reducing sound loss in the high-frequency band, a chamber structure with more than one opening can therefore be selected.

[0088] Fig. Figure 14 shows a schematic representation of the earphone in an exemplary worn state according to some further embodiments of the present application. Fig. Figure 15 shows a schematic structural representation of one side of the earphone facing the ear. Fig. 14.

[0089] The in Fig. 14 of the earphones shown, 10 of which has a similar structure to that of the one in Fig. The earphone 10 shown in Figure 7 is described. For example, the ear hook 12 is designed as an arc-shaped structure that rests against the connection area between the head and the ear 100 of the user. The sound-generating part 11 (or the housing 111 of the sound-generating part 11) can have a connecting end CE that is connected to the ear hook 12 and a free end FE that is not connected to the ear hook 12.When the earphone 10 is worn, the first part 121 of the ear hook 12 (for example, the hook part of the ear hook 12) is suspended between the auricle (for example, the helix 107) and the user's head, while the second part 122 of the ear hook 12 (for example, the connecting part of the ear hook) extends towards a side of the auricle facing away from the head and is connected to the connecting end CE of the sound-generating part 11 in order to position the sound-generating part 11 near the ear canal without obstructing it. Fig. 14 of the earphones shown, 10 of which has a similar structure to that of the one in Fig. The earphone 10 shown in Figure 7 differs significantly in that the sound-generating element 11 is angled, and the housing 111 of the sound-generating element 11 is at least partially inserted into the concha 102. For example, the free end FE of the sound-generating element 11 can project into the concha 102. The ear hook 12 and the sound-generating element 11, designed in this way, conform well to the user's ear 100 and can increase the resistance to the earphone 10 falling out of the ear 100, thus increasing the stability of the earphone 10 when worn.

[0090] In some embodiments, when worn, the connecting end CE of the sound-generating part 11 is positioned closer to the top of the head than the free end FE when viewed in the thickness direction Z, in order to facilitate the insertion of the free end FE into the conchal cavity. The angle between the direction X of the long axis and the direction of the sagittal axis of the human body can be between 15° and 60°. If this angle is too small, the free end FE may not be able to insert into the conchal cavity, and the sound outlet opening 112 on the sound-generating part 11 may be too far from the ear canal. Conversely, if this angle is too large, the sound-generating part 11 may not be able to insert into the conchal cavity, and the ear canal may be blocked by the sound-generating part 11.In other words, this design allows both the sound-generating part 11 to protrude into the concha and ensures an adequate distance between the sound outlet opening 112 on the sound-generating part 11 and the ear canal. This allows the user to receive more of the sound generated by the sound-generating part 11 without obstructing the ear canal.

[0091] In some embodiments, the sound-generating element 11 and the ear hook 12 can jointly clamp the aforementioned ear area from both the front and back of the ear area corresponding to the conchal cavity (cavum conchae) to increase the resistance against the earphone 10 falling out of the ear and thus improve the stability of the earphone 10 when worn. For example, the free end FE of the sound-generating element 11 is pressed into the conchal cavity in the thickness direction Z. Alternatively, the free end FE may lie against the inside of the conchal cavity in the X direction of the long axis and in the Y direction of the short axis.

[0092] In some embodiments, it is provided that both ends of the second part 122 of the ear hook 12 can each be connected to the first part 121 of the ear hook 12 and the connecting end CE of the sound-generating part 11, as shown in Fig. Figure 15 shows that in some embodiments, the second part 122 of the ear hook 12 may have a lowest point P and a highest point Q in the Y direction of the short axis of the sound-generating part 11. When the earphone 10 is worn, the distance h1 between the center of the first pressure relief opening 1131 and the lowest point P in the X direction of the long axis of the sound-generating part 11 may be 5.28 mm to 7.92 mm to ensure that the first pressure relief opening 1131 is not obstructed by a structure (for example, the helix or the tragus) of the ear. In some embodiments, it is provided that a distance h2 between the center of the first pressure relief opening 1131 and the highest point Q in the direction X of the long axis of the sound generating part 11 can be 8.68 mm to 13.02 mm, so that when the earphone 10 is worn by the user, the earphone can rest against the user's ear.In some embodiments, the distance between the center of the first pressure relief opening 1131 and any point on the second part 122 of the ear hook 12, in the X direction of the long axis of the sound-generating part 11, is in the range of 5.28 mm to 14 mm when the earphone is worn by the user. In some embodiments, the distance between the center of the first pressure relief opening 1131 and any point on the second part 122 of the ear hook, in the X direction of the long axis of the sound-generating part 11, is in the range of 5.28 mm to 13.02 mm. In some embodiments, the distance between the center of the first pressure relief opening 1131 and any point on the second part 122 of the ear hook, in the X direction of the long axis of the sound-generating part 11, is in the range of 6.58 mm to 12.02 mm.In some embodiments, the distance between the center of the first pressure relief opening 1131 and any point on the second part 122 of the ear hook, in the X direction of the long axis of the sound-generating part 11, is in the range of 7.58 mm to 10.02 mm. In some embodiments, the distance between the center of the first pressure relief opening 1131 and any point on the second part 122 of the ear hook, in the X direction of the long axis of the sound-generating part 11, is in the range of 8.58 mm to 9.02 mm.

[0093] As in Fig. As shown in Figure 14, in the user-worn earphone 10, the housing 111 of the sound-generating part 11 is arranged such that it is at least partially inserted into the caveum conchae 102, whereby the chamber enclosed jointly by the inner surface IS of the sound-generating part 11 and the caveum conchae 102 is described as the one shown in Figure 14. Fig. 10 chamber structure shown 41 can be considered and the gap formed between the inner surface IS and the cavum conchae (for example, a first leakage structure UC, which is formed near the top of the head between the inner surface IS and the cavum conchae, or a second leakage structure LC, which is formed near the ear canal between the inner surface IS and the ear) can be considered as the one in Fig. Leakage structure 42 shown in Figure 10 can be considered. The sound outlet opening 112 provided on the inside IS can be considered a point sound source within the structure shown in Figure 10. Fig. The chamber structure 41 shown in Figure 10 can be considered. The pressure relief openings 113 (for example, the first pressure relief opening 1131 and the second pressure relief opening 1132) provided on another side (for example, the top US and / or the bottom LS) of the sound-generating part 11 can be considered as a point sound source outside the chamber structure shown in Figure 10. Fig. The chamber structure shown in Figure 10 is considered in Figure 41. Based on a relevant description using the following methods... Fig. 10 to 13, with regard to the effect of hearing, it is provided that the sound emitted from the sound outlet opening 112 usually reaches the ear canal by direct radiation or reflection, and thus the volume of the sound reaching the ear canal, in particular the volume of hearing at mid and low frequencies, can be considerably increased if the earphone 10 is worn at least partially inserted into the cavum conchae, as shown in the Fig. The device is worn as shown in Figure 14. Simultaneously, only a small portion of the out-of-phase sound emitted from the pressure relief openings 113 (for example, the first pressure relief opening 1131 and the second pressure relief opening 1132) passes through the gap (the first leakage structure UC and the second leakage structure LC) into the concha. The out-of-phase cancellation of this sound and the sound generated by the sound outlet opening 112 is weak, thus significantly increasing the perceived loudness at the ear canal. Regarding the reduction of sound loss, the sound outlet opening 112 is designed to release the sound through the gap to the outside environment and to cancel out the sound generated by the pressure relief openings 113 (for example, the first pressure relief opening 1131 and the second pressure relief opening 1132) in the far field, thereby ensuring the reduction of sound loss.

[0094] To avoid the influence of the sound emitted through the first pressure relief opening 1131 and the second pressure relief opening 1132 on the loudness of the sound emitted through the sound outlet opening 112 at the listening position, some embodiments provide that the first pressure relief opening 1131 and the second pressure relief opening 1132 should be arranged as far away as possible from the sound outlet opening 112. For example, it is possible for the center of the sound outlet opening 112 to be located on a perpendicular plane or near the perpendicular plane of a line connecting the center of the first pressure relief opening 1131 with the center of the second pressure relief opening 1132.In some embodiments, the distance between the center of the sound outlet opening 112 and the perpendicular plane of the line connecting the center of the first pressure relief opening 1131 with the center of the second pressure relief opening 1132 can be 0 mm to 2 mm. In some embodiments, the distance between the center of the sound outlet opening 112 and the perpendicular plane of the line connecting the center of the first pressure relief opening 1131 with the center of the second pressure relief opening 1132 can be 0 mm to 1 mm. In some embodiments, the distance between the center of the sound outlet opening 112 and the perpendicular plane of the line connecting the center of the first pressure relief opening 1131 with the center of the second pressure relief opening 1132 can be 0 mm to 0.5 mm.

[0095] In some embodiments, the relationship between the distance between the center O1 of the first pressure relief opening 1131 and the center O of the sound outlet opening 112 (also referred to as the first distance) and the distance between the center O2 of the second pressure relief opening 1132 and the center O of the sound outlet opening 112 (also referred to as the second distance) can be determined such that the center O of the sound outlet opening 112 lies almost in the perpendicular plane of the line connecting O1O2. In some embodiments, the difference between the first distance and the second distance is less than 10%. In some embodiments, the difference between the first distance and the second distance is less than 8%. In some embodiments, the difference between the first distance and the second distance is less than 5%.In some embodiments, it is provided that the difference between the first distance and the second distance is less than 2%.

[0096] In some embodiments, the distance between the first pressure relief opening 1131 or the second pressure relief opening 1132 and the sound outlet opening 112 should not be too close, in order to prevent the user's hearing quality from being affected by the near-field cancellation of the sound wave emitted through the pressure relief openings (for example, the first pressure relief opening 1131 and the second pressure relief opening 1132) and the sound wave emitted through the sound outlet opening 112. In some embodiments, the distance between the center O1 of the first pressure relief opening 1131 and the center O of the sound outlet opening 112 can be between 4 mm and 15.11 mm. In some embodiments, the distance between the center O1 of the first pressure relief opening 1131 and the center O of the sound outlet opening 112 can be 4 mm to 15 mm.In some embodiments, the distance between the center O1 of the first pressure relief opening 1131 and the center O of the sound outlet opening 112 can be from 5.12 mm to 15.11 mm. In some embodiments, the distance between the center O1 of the first pressure relief opening 1131 and the center O of the sound outlet opening 112 can be from 5 mm to 14 mm. In some embodiments, the distance between the center O1 of the first pressure relief opening 1131 and the center O of the sound outlet opening 112 can be from 6 mm to 13 mm. In some embodiments, the distance between the center O1 of the first pressure relief opening 1131 and the center O of the sound outlet opening 112 can be from 7 mm to 12 mm.In some embodiments, the distance between the center O1 of the first pressure relief opening 1131 and the center O of the sound outlet opening 112 can be 8 mm to 10 mm.

[0097] In some embodiments, the distance between the center O2 of the second pressure relief opening 1132 and the center O of the sound outlet opening 112 can be 4 mm to 16.1 mm. In some embodiments, the distance between the center O2 of the second pressure relief opening 1132 and the center O of the sound outlet opening 112 can be 4 mm to 15 mm. In some embodiments, the distance between the center O2 of the second pressure relief opening 1132 and the center O of the sound outlet opening 112 can be 5 mm to 14 mm. In some embodiments, the distance between the center O2 of the second pressure relief opening 1132 and the center O of the sound outlet opening 112 can be 5.12 mm to 16.1 mm.In some embodiments, the distance between the center O2 of the second pressure relief opening 1132 and the center O of the sound outlet opening 112 can be 6 mm to 13 mm. In some embodiments, the distance between the center O2 of the second pressure relief opening 1132 and the center O of the sound outlet opening 112 can be 7 mm to 12 mm. In some embodiments, the distance between the center O2 of the second pressure relief opening 1132 and the center O of the sound outlet opening 112 can be 8 mm to 10 mm.

[0098] To reduce the influence of the pressure relief openings on the sound emitted at the sound outlet, in some embodiments it is more effective the further the first pressure relief opening 1131 and the second pressure relief opening 1132 are simultaneously arranged from the sound outlet opening 112. To position the first pressure relief opening 1131 and the second pressure relief opening 1132 far from the sound outlet opening 112, the ratio of the distance between the center O of the sound outlet opening 112 and the center O1 of the first pressure relief opening 1131 to the distance between the center O of the sound outlet opening 112 and the center O2 of the second pressure relief opening 1132 is in the range of 0.9 to 1.1.In some embodiments, the ratio of the distance between the center O of the sound outlet opening 112 and the center O1 of the first pressure relief opening 1131 to the distance between the center O of the sound outlet opening 112 and the center O2 of the second pressure relief opening 1132 is in the range of 0.92 to 1.08. In some embodiments, the ratio of the distance between the center O of the sound outlet opening 112 and the center O1 of the first pressure relief opening 1131 to the distance between the center O of the sound outlet opening 112 and the center O2 of the second pressure relief opening 1132 is in the range of 0.94 to 1.06.In some embodiments, the ratio of the distance between the center O of the sound outlet opening 112 and the center O1 of the first pressure relief opening 1131 to the distance between the center O of the sound outlet opening 112 and the center O2 of the second pressure relief opening 1132 is in the range of 0.96 to 1.04.

[0099] To further prevent the cancellation of the sound emitted through the second pressure relief opening 1132 and the sound emitted through the sound outlet opening 112 in the ear canal (i.e., in the listening position), thereby reducing the volume of hearing, some embodiments provide that the area of ​​the second pressure relief opening 1132 can be reduced in order to decrease the intensity of the sound diverted through the second pressure relief opening 1132 and transmitted to the ear canal, whereby the area of ​​the second pressure relief opening 1132 can be smaller than the area of ​​the first pressure relief opening 1131 (as in Fig. 17 shown).

[0100] To increase the distance between the first pressure relief opening 1131 or the second pressure relief opening 1132 and the sound outlet opening 112, the angle between the connecting line O1O of the center O1 of the first pressure relief opening 1131 and the center O of the sound outlet opening 112, and the connecting line O2O of the center O2 of the second pressure relief opening 1132 and the center O of the sound outlet opening 112, can be reduced in some embodiments. In some embodiments, the angle between the connecting line O1O and the connecting line O2O is in the range of 46.40° to 114.04°. In some embodiments, the angle between the connecting line O1O and the connecting line O2O is in the range of 46.40° to 90.40°. In some embodiments, the angle between the connecting line O1O and the connecting line O2O is in the range of 46.40° to 70.04°.In some embodiments, the angle between the connecting line O1O and the connecting line O2O is in the range of 46.40° to 60.04°.

[0101] In some embodiments, the angle between the connecting line 0102 of the center O1 of the first pressure relief opening 1131 with the center O2 of the second pressure relief opening 1132 and the connecting line O2O is in the range of 19.72° to 101.16°. In some embodiments, the angle between the connecting line 0102 and the connecting line O2O is in the range of 19.71° to 97.75°.

[0102] Fig. Figure 16 shows a schematic representation of a projection of the earphone in the worn state onto the sagittal plane according to some embodiments of the present description.

[0103] Combined with Fig. 14 and Fig. In some embodiments, 16 provides that the free end FE can lie inside the cavum conchae in the X direction of the long axis and the Y direction of the short axis in order to stably support the sound-generating part 11 against the user's ear, the design of which in Fig. The chamber structure shown in Figure 10 is simplified and at least two leakage structures are provided to the chamber structure. The inner surface IS of the sound-generating element 11 is inclined relative to the sagittal plane, and there is at least one first leakage structure UC (i.e., a gap formed between the concha and the upper boundary of the inner surface IS) located near the top of the head, and a second leakage structure LC (i.e., a gap formed between the concha and the lower boundary of the inner surface IS) located near the ear canal. This allows the volume of hearing, especially at mid or low frequencies, to be increased. At the same time, the effect of cancellation for sound loss in the far field is retained. This improves the acoustic output performance of the earphone 10.

[0104] If the earphone is 10, as in Fig. In some embodiments, the first leakage structure UC and the second leakage structure LC, each formed between the inner surface IS of the sound-generating part 11 and the concha, as shown in Figure 14, have specific dimensions in the X direction of the long axis and in the Z direction of the thickness. To better understand the positions of the first leakage structure UC and the second leakage structure LC, the midpoint between the two points formed by the intersection of the upper / lower boundary of the inner surface IS of the earphone 10 with the ear (for example, the flank of the concha, the crus helicis) in the worn state can serve as a reference point for the positions of the first leakage structure UC and the second leakage structure LC.In some embodiments, to better understand the positions of the first leakage structure UC and the second leakage structure LC, the midpoint of the upper boundary of the inner surface IS of the earphone 10 in the worn state can serve as a reference point for the position of the first leakage structure UC and the third-division point of the lower boundary of the inner surface IS located near the free end FE (hereinafter referred to as the point at the third of the lower boundary of the inner surface IS) as a reference point for the position of the second leakage structure LC.

[0105] It should be noted that if the connection area between the inner surface IS and the upper surface US and / or the lower surface LS is arc-shaped, the center point of the upper boundary of the inner surface IS of the sound-generating part 11 can be selected by the following exemplary methods: determining a projection profile of the sound-generating part 11 in the thickness direction Z; determining two first positioning points on the sound-generating part 11 that have maximum perpendicular distances to the median plane of the short axis of the magnetic circuit arrangement (for example, a magnetic circuit arrangement 1144 described below) of the transducer in the direction X of the long axis and are closest to the upper surface US; determining a projection profile of the sound-generating part 11 between the two first positioning points as the projection profile of the upper boundary of the inner surface IS; and determining a distance on the sound-generating part 11,The surface closest to the inner surface IS, whose projection coincides completely with the projection line of the upper boundary of the inner surface IS, is considered the upper boundary of the inner surface IS. In some alternative embodiments, it is provided that a line of intersection between a tangential surface of the inner surface IS running parallel to the XY plane (a plane formed by the X direction of the long axis and the Y direction of the short axis) and a tangential surface of the top surface US running parallel to the ZX plane (a plane formed by the thickness direction Z and the X direction of the long axis) can be determined as the upper boundary of the inner surface IS if one or more side surfaces (for example, the inner surface IS,The upper surface (US) and / or the lower surface (LS) of the sound-generating part 11 is curved. The center point of the upper boundary of the inner surface IS can be the intersection of the upper boundary of the inner surface IS with the median plane of the short axis of the magnetic circuit arrangement. The median plane of the short axis of the magnetic circuit arrangement refers to a plane that runs parallel to the direction Y of the short axis and the thickness direction Z of the sound-generating part 11 and passes through the median axis of the magnetic circuit arrangement.

[0106] Similarly, the point at the third of the lower boundary of the inner surface IS of the sound-generating part 11 can be selected by the following exemplary methods: determining a projection profile of the sound-generating part 11 in the thickness direction Z; determining two second positioning points on the sound-generating part 11 that have maximum perpendicular distances to the median plane of the short axis of the magnetic circuit arrangement in the direction X of the long axis and are closest to the bottom surface LS; determining a projection profile of the sound-generating part 11 between the two second positioning points as the projection profile of the lower boundary of the inner surface IS; and determining a line segment on the sound-generating part 11 that is closest to the inner surface IS and whose projection completely coincides with the projection line of the lower boundary of the inner surface IS, as the lower boundary of the inner surface IS.In some alternative embodiments, it is provided that a line of intersection between a tangential surface of the inner surface IS running parallel to the YX plane (a plane formed by the Y direction of the short axis and the X direction of the long axis) and a tangential surface of the underside LS running parallel to the XY plane (a plane formed by the thickness direction Z and the X direction of the long axis) can be determined as the lower boundary of the inner surface IS if one or more side surfaces (for example, the inner surface IS, the top surface US, and / or the underside LS) of the sound-generating part 11 are arc-shaped. The point at the third of the lower boundary of the inner surface IS can be an intersection of the lower boundary of the inner surface IS with a third-division surface of the magnetic circuit arrangement located near the free end FE.The third division area of ​​the magnetic circuit arrangement located near the free end FE refers to a plane that runs parallel to the direction Y of the short axis and thickness direction Z of the sound generating part 11 and passes through the third division point of the long axis of the magnetic circuit arrangement located near the free end FE.

[0107] In this description, the midpoint of the upper boundary and the point at the third of the lower boundary of the inner surface IS are used as examples only, each serving as a reference point for the positions of the first leakage structure UC and the second leakage structure LC. It should be noted that the midpoint of the upper boundary and the point at the third of the lower boundary of the inner surface IS are selected only as examples of reference points for describing the positions of the first leakage structure UC and the second leakage structure LC. In some embodiments, other reference points may also be selected for describing the positions of the first leakage structure UC and the second leakage structure LC.For example, variations between the ears of different users mean that the first leakage structure UC / the second leakage structure LC formed in the earphone 10 when worn will each represent a gap with a gradually changing width. In this case, the reference position of the first leakage structure UC / the second leakage structure LC can be the position of the widest area located near the gap at the upper / lower boundary of the inner surface IS. For example, the point near the free end FE at one-third of the upper boundary of the inner surface IS can serve as the position of the first leakage structure UC, and the midpoint of the lower boundary of the inner surface IS can serve as the position of the second leakage structure LC.

[0108] Combined with Fig. 14 to Fig. In some embodiments, the sound outlet 112 is arranged as close as possible to the ear canal so that, when the earphone 10 is worn, the projection of the sound outlet 112 onto the sagittal plane can lie partially or completely within the region of the conchal cavity, and at the same time the sound intensity through the sound outlet 112 at the ear canal (i.e., in the listening position) is improved. In some embodiments, the distance h between the center O of the sound outlet 112 and the underside LS of the sound-generating part 11 in the Y-direction is in the range of 4.05 mm to 6.05 mm. In some embodiments, the distance h between the center O of the sound outlet 112 and the underside LS of the sound-generating part 11 in the Y-direction is in the range of 4.50 mm to 5.85 mm.In some embodiments, the distance h between the center O of the sound outlet opening 112 and the underside LS of the sound-generating part 11 in the Y-direction is in the range of 4.80 mm to 5.50 mm. In some embodiments, the distance h between the center O of the sound outlet opening 112 and the underside LS of the sound-generating part 11 in the Y-direction is in the range of 5.20 mm to 5.55 mm.

[0109] In some embodiments, the dimension of the long axis of the sound-generating part 11 should not be too large, so that the sound-generating part 11 can be at least partially embedded in the cavity. Provided that the insertion of at least part of the sound-generating part 11 into the cavity is ensured, the distance from the center O of the sound outlet opening 112 in the X-direction to the rear side RS of the sound-generating part 11 cannot be too small. Otherwise, the entire area or part of the area of ​​the sound outlet opening may be obscured by the free end FE against the wall surface of the cavity, thus reducing the effective area of ​​the sound outlet opening. Therefore, in some embodiments, the distance between the center O of the sound outlet opening 112 and the rear side RS of the sound-generating part 11 in the X-direction is in the range of 8.15 mm to 12.25 mm.In some embodiments, the distance between the center O of the sound outlet opening 112 and the rear side RS of the sound-generating part 11 in the X-direction is in the range of 8.50 mm to 12.00 mm. In some embodiments, the distance between the center O of the sound outlet opening 112 and the rear side RS of the sound-generating part 11 in the X-direction is in the range of 8.85 mm to 11.65 mm. In some embodiments, the distance between the center O of the sound outlet opening 112 and the rear side RS of the sound-generating part 11 in the X-direction is in the range of 9.25 mm to 11.15 mm. In some embodiments, the distance between the center O of the sound outlet opening 112 and the rear RS of the sound generating part 11 in the X direction is in the range of 9.60 mm to 10.80 mm.

[0110] As in Fig. As shown in Figure 16, in some embodiments, the projection of the upper boundary of the inner surface IS onto the sagittal plane can coincide with the projection of the upper surface US onto the sagittal plane, and the projection of the lower boundary of the inner surface IS onto the sagittal plane can coincide with the projection of the lower surface LS onto the sagittal plane. The projection of the reference point for the position of the first leakage structure UC (i.e., the midpoint of the upper boundary of the inner surface IS) onto the sagittal plane is designated as point A, and the projection of the reference point for the position of the second leakage structure LC (i.e., the point at the third of the lower boundary of the inner surface IS) onto the sagittal plane is designated as point C.The projection of the center O of the sound outlet opening 112 onto the sagittal plane is called point O', the projection of the center O1 of the first pressure relief opening 1131 onto the sagittal plane is called O1' and the projection of the center O2 of the second pressure relief opening 1132 onto the sagittal plane is called point O2'.

[0111] As in Fig. As shown in Figure 16, in some embodiments it is provided that, when worn, the projection of the sound-generating part 11 of the earphone 10 onto the sagittal plane at least partially covers the user's ear canal, but the ear canal can communicate with the outside environment through the cavum conchae in order to expose the user's two ears.In some embodiments, the distance between the sound outlet opening 112 and the first pressure relief opening 1131 / second pressure relief opening 1132 and the first leakage structure UC and the second leakage structure LC is designed to ensure the cancellation of sound loss. This is because the sound emitted into the external environment from the sound outlet opening 112 through the first leakage structure UC and the second leakage structure LC cancels each other out in the far field, as does the sound emitted from the first pressure relief opening 1131 and / or the second pressure relief opening 1132. In some embodiments, the sound outlet opening 112 is positioned close to the ear canal when the earphone is worn to ensure sufficient sound intensity at the ear canal.Thus, the sound outlet 112 can be positioned closer to the underside LS than to the upper side US. This means that the sound outlet 112 can be located further away from the first leakage structure UC. Considering that the required width dimension for the sound-generating element 11 would increase with the distance between the sound outlet 112 and the first leakage structure UC, the overall audibility index (across the entire frequency range) of the earphone 10 would be correspondingly lower with a larger volume V of the chamber structure formed between the sound-generating element 11 and the cavity conchae. This is because, due to air acoustic resonance within the chamber structure, an air acoustic resonance occurs at the chamber structure's resonance frequency, resulting in a sound being radiated outwards that is significantly louder than that emitted through the pressure relief opening.This leads to a significant increase in sound loss, which significantly reduces the audibility index near this resonance frequency.

[0112] Provided that the sound-generating element 11 is at least partially inserted into the cavum conchae, some embodiments provide that the distance between the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane and the projection point A of the center point of the upper boundary of the inner surface IS onto the sagittal plane can be in the range of 10.0 mm to 15.2 mm, so that the sound outlet opening 112 can be positioned near the ear canal and the chamber structure has a suitable volume V, thus enabling better sound reception quality in the ear canal. In some embodiments, the distance from the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane to the projection point A of the center point of the upper boundary of the inner surface IS onto the sagittal plane is in the range of 11.0 mm to 14.2 mm.In some embodiments, the distance from the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane to the projection point A of the center point of the upper boundary of the inner surface IS onto the sagittal plane is in the range of 12.0 mm to 14.7 mm. In some embodiments, the distance from the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane to the projection point A of the center point of the upper boundary of the inner surface IS onto the sagittal plane is in the range of 12.5 mm to 14.2 mm. In some embodiments, the distance from the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane to the projection point A of the center point of the upper boundary of the inner surface IS onto the sagittal plane is in the range of 13.0 mm to 13.7 mm.

[0113] In some embodiments, sound leakage through the sound outlet opening 112 via the first leakage structure UC corresponds to the creation of a secondary sound source at the first leakage structure UC. To ensure the cancellation of the sound emitted from the first pressure relief opening 1131 and the sound exiting the sound outlet opening 112 via the first leakage structure UC in the far field, the first pressure relief opening 1131 can be located close to the first leakage structure UC. In some embodiments, the first pressure relief opening 1131 can be located closer to the first leakage structure UC than the sound outlet opening 112, i.e.,The distance between the center O of the sound outlet opening 112 and the center point of the upper boundary of the inner surface IS is greater than the distance between the center O1 of the first pressure relief opening 1131 and the center point of the upper boundary of the inner surface IS, in order to achieve effective sound cancellation while simultaneously ensuring sufficient sound intensity at the ear canal. In some embodiments, the ratio of the distance between the center O of the sound outlet opening 112 and the center point of the upper boundary of the inner surface IS to the distance between the center O1 of the first pressure relief opening 1131 and the center point of the upper boundary of the inner surface IS is in the range of 1.3 to 2.1.In some embodiments, the ratio of the distance between the center O of the sound outlet opening 112 and the center point of the upper boundary of the inner surface IS to the distance between the center O1 of the first pressure relief opening 1131 and the center point of the upper boundary of the inner surface IS is in the range of 1.4 to 2.0. In some embodiments, the ratio of the distance between the center O of the sound outlet opening 112 and the center point of the upper boundary of the inner surface IS to the distance between the center O1 of the first pressure relief opening 1131 and the center point of the upper boundary of the inner surface IS is in the range of 1.5 to 1.9.In some embodiments, the ratio of the distance between the center O of the sound outlet opening 112 and the center point of the upper boundary of the inner surface IS to the distance between the center O1 of the first pressure relief opening 1131 and the center point of the upper boundary of the inner surface IS is in the range of 1.6 to 1.8.

[0114] In some embodiments, the projection point O1' of the center O1 of the first pressure relief opening 1131 onto the sagittal plane and the projection point A of the center point of the upper boundary of the inner surface IS onto the sagittal plane can essentially coincide. In some embodiments, the distance between the projection point O1' of the center O1 of the first pressure relief opening 1131 onto the sagittal plane and the projection point A of the center point of the upper boundary of the inner surface IS onto the sagittal plane is in the range of no more than 2 mm. In some embodiments, the distance between the projection point O1' of the center O1 of the first pressure relief opening 1131 onto the sagittal plane and the projection point A of the center point of the upper boundary of the inner surface IS onto the sagittal plane is in the range of no more than 1 mm.In some embodiments, the distance between the projection point O1' of the center O1 of the first pressure relief opening 1131 onto the sagittal plane and the projection point A of the center point of the upper boundary of the inner side IS onto the sagittal plane is in the range which is not greater than 0.5 mm.

[0115] In some embodiments, the volume V of the chamber structure is larger the greater the distance from the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane to the projection point C of the point at the third of the lower boundary of the inner surface IS onto the sagittal plane. Provided that the sound-generating part 11 is at least partially inserted into the cavum conchae, improved sound reception quality in the ear canal is achieved by positioning the sound outlet opening 112 near the ear canal and by having a chamber structure with a suitable volume V. In some embodiments, the distance from the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane to the projection point C of the point at the third of the lower boundary of the inner surface IS onto the sagittal plane is in the range of 3.5 mm to 5.6 mm.In some embodiments, the distance from the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane to the projection point C of the point at the third of the lower boundary of the inner surface IS onto the sagittal plane is in the range of 3.9 mm to 5.2 mm. In some embodiments, the distance from the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane to the projection point C of the point at the third of the lower boundary of the inner surface IS onto the sagittal plane is in the range of 4.3 mm to 4.8 mm. In some embodiments, the distance from the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane to the projection point C of the point at the third of the lower boundary of the inner surface IS onto the sagittal plane is in the range of 4.5 mm to 4.6 mm.

[0116] In some embodiments, the distance between the projection point O2' of the center O2 of the second pressure relief opening 1132 onto the sagittal plane and the projection point C of the point at the third of the lower boundary of the inner surface IS onto the sagittal plane is in the range of 8.16 mm to 12.24 mm in order to increase the distance between the second pressure relief opening 1132 and the sound outlet opening 112 and thus reduce the cancellation of the sound of the second pressure relief opening 1132 and the sound of the sound outlet opening 112 by transmission via the second leakage structure LC to the chamber structure. In some embodiments, the distance between the projection point O2' of the center O2 of the second pressure relief opening 1132 onto the sagittal plane and the projection point C of the point at the third of the lower boundary of the inner side IS onto the sagittal plane is in the range of 9.16 mm to 11.24 mm.In some embodiments, the distance between the projection point O2' of the center O2 of the second pressure relief opening 1132 onto the sagittal plane and the projection point C of the point at the third of the lower boundary of the inner surface IS onto the sagittal plane is in the range of 9.66 mm to 10.74 mm.

[0117] In some embodiments, sound leakage through the sound outlet opening 112 via the second leakage structure LC is provided for, resulting in a secondary sound source at the second leakage structure LC. Considering that the second pressure relief opening 1132 is located close to the ear canal opening, the distance between the second pressure relief opening 1132 and the point at the third (i.e., the second leakage structure LC) of the lower boundary of the inner surface IS should not be too small in order to dampen the degree of cancellation of the sound from the second pressure relief opening 1132 and the sound from the sound outlet opening 112 due to transmission via the second leakage structure LC to the chamber structure in the ear canal.To simultaneously ensure the cancellation of the sound emitted from the second pressure relief opening 1132 and the sound exiting from the sound outlet opening 112 via the second leakage structure LC in the far field, the distance between the second pressure relief opening 1132 and the point at the third (i.e., the second leakage structure LC) of the lower boundary of the inner surface IS should not be too large. In some embodiments, the ratio of the distance between the center O of the sound outlet opening 112 and the point at the third (i.e., the second leakage structure LC) of the lower boundary of the inner surface IS to the distance between the center O2 of the second pressure relief opening 1132 and the point at the third (i.e., the second leakage structure LC) of the lower boundary of the inner surface IS can be in the range of 0.65 to 1.05.In some embodiments, the ratio of the distance between the center O of the sound outlet opening 112 and the point at the third of the lower boundary of the inner surface IS to the distance between the center O2 of the second pressure relief opening 1132 and the point at the third of the lower boundary of the inner surface IS is in the range of 0.75 to 1. In some embodiments, the ratio of the distance between the center O of the sound outlet opening 112 and the point at the third of the lower boundary of the inner surface IS to the distance between the center O2 of the second pressure relief opening 1132 and the point at the third of the lower boundary of the inner surface IS is in the range of 0.8 to 0.9.In some embodiments, the ratio of the distance between the center O of the sound outlet opening 112 and the point at the third of the lower boundary of the inner surface IS to the distance between the center O2 of the second pressure relief opening 1132 and the point at the third of the lower boundary of the inner surface IS is in the range of 0.82 to 0.88, in order to dampen the degree of cancellation of the sound from the second pressure relief opening 1132 and the sound from the sound outlet opening 112 by transmission via the second leakage structure LC to the chamber structure in the ear canal, and at the same time to ensure the effect of cancellation of the sound emitted through the second pressure relief opening 1132 and the sound exiting the sound outlet opening 112 via the second leakage structure LC in the far field.

[0118] In some embodiments, the positional relationship between the center O of the sound outlet opening 112, the point at the third of the lower boundary of the inner surface IS and the center O2 of the second pressure relief opening 1132 can also be characterized by the ratio of the distance between the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane and the projection point C of the point at the third of the lower boundary of the inner surface onto the sagittal plane to the distance between the projection point O2' of the center O2 of the second pressure relief opening 1132 onto the sagittal plane and the projection point C of the point at the third of the lower boundary of the inner surface onto the sagittal plane.In some embodiments, the ratio of the distance between the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane and the projection point C of the point at the third of the lower boundary of the inner side onto the sagittal plane to the distance between the projection point O2' of the center O2 of the second pressure relief opening 1132 onto the sagittal plane and the projection point C of the point at the third of the lower boundary of the inner side onto the sagittal plane is in the range of 0.28 to 0.68.In some embodiments, the ratio of the distance between the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane and the projection point C of the point at the third of the lower boundary of the inner side onto the sagittal plane to the distance between the projection point O2' of the center O2 of the second pressure relief opening 1132 onto the sagittal plane and the projection point C of the point at the third of the lower boundary of the inner side onto the sagittal plane is in the range of 0.33 to 0.59.In some embodiments, the ratio of the distance between the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane and the projection point C of the point at the third of the lower boundary of the inner side onto the sagittal plane to the distance between the projection point O2' of the center O2 of the second pressure relief opening 1132 onto the sagittal plane and the projection point C of the point at the third of the lower boundary of the inner side onto the sagittal plane is in the range of 0.38 to 0.51.In some embodiments, the ratio of the distance between the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane and the projection point C of the point at the third of the lower boundary of the inner side onto the sagittal plane to the distance between the projection point O2' of the center O2 of the second pressure relief opening 1132 onto the sagittal plane and the projection point C of the point at the third of the lower boundary of the inner side onto the sagittal plane is in the range of 0.41 to 0.48.

[0119] In some embodiments, the presence of the tragus near the ear canal opening means that the sound outlet opening 112 is susceptible to being obscured by the tragus. The sound outlet opening 112 should ideally be positioned at a distance from the center of the ear canal opening so that it is located as close as possible to the ear canal and is not obscured. To simplify the description, some embodiments provide that the positional relationship between a specific position (for example, the center O of the sound outlet opening 112) and the center of the ear canal opening can be characterized by the distance between a projection point of the position (for example, the center O of the sound outlet opening 112) onto the sagittal plane and the centroid of the projection of the ear canal opening onto the sagittal plane.For example, in some embodiments, the distance between the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane is in the range of 2.2 mm to 3.8 mm. In some embodiments, the distance between the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane is in the range of 2.4 mm to 3.6 mm. In some embodiments, the distance between the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane is in the range of 2.6 mm to 3.4 mm.In some embodiments, the distance between the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane is in the range of 2.8 mm to 3.2 mm. It should be noted that the shape of the projection of the ear canal opening onto the sagittal plane can be considered almost oval. Accordingly, the centroid of the projection of the ear canal opening onto the sagittal plane can represent the geometric center of the oval shape.

[0120] In some embodiments, the distance between the projection point A of the center of the upper boundary of the inner surface IS onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane is in the range of 12 mm to 18 mm, and the distance between the projection point O2' of the center O2 of the second pressure relief opening onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane is in the range of 6.88 mm to 10.32 mm to ensure that the sound-generating part 11 projects into the cavum conchae and that there is an inclined gap between the upper boundary of the inner surface IS and the cavum conchae (to form an opening of the chamber structure).In some embodiments, the distance between the projection point A of the center of the upper boundary of the inner surface IS onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane is in the range of 14 mm to 16 mm, and the distance between the projection point O2' of the center O2 of the second pressure relief opening onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane is in the range of 7.88 mm to 9.32 mm.In some embodiments, the distance between the projection point A of the center of the upper boundary of the inner surface IS onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane is in the range of 14.5 mm to 15.5 mm, and the distance between the projection point O2' of the center O2 of the second pressure relief opening onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane is in the range of 7.88 mm to 8.32 mm.

[0121] In some embodiments, the distance between the projection point O1' of the center O1 of the first pressure relief opening 1131 onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane is in the range of 12 mm to 18 mm to ensure that the sound-generating part 11 projects into the cavum conchae and that an inclined gap exists between the upper boundary of the inner surface IS and the cavum conchae (to form an opening of the chamber structure). In some embodiments, the distance between the projection point O1' of the center O1 of the first pressure relief opening 1131 onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane is in the range of 14 mm to 16 mm.In some embodiments, the distance between the projection point O1' of the center O1 of the first pressure relief opening 1131 onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane is in the range of 14.5 mm to 15.5 mm.

[0122] In some embodiments, the distance between projection point C of the point at the third of the lower boundary of the inner surface onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane is in the range of 1.76 mm to 2.64 mm to ensure that the sound-generating part 11 projects into the cavum conchae and that an inclined gap exists between the upper boundary of the inner surface IS and the cavum conchae (to form an opening of the chamber structure). In some embodiments, the distance between projection point C of the point at the third of the lower boundary of the inner surface onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane is in the range of 1.96 mm to 2.44 mm.In some embodiments, the distance between the projection point C of the point on the third of the lower boundary of the inner side onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane is in the range of 2.16 mm to 2.24 mm.

[0123] In some embodiments, it is provided that the ratio of the distance between the center O of the sound outlet opening 112 and the center of the ear canal opening to the distance between the center O1 of the first pressure relief opening 1131 and the center of the ear canal opening can be in a suitable range so that the sound-generating part 11 can project into the cavum conchae, the first pressure relief opening 1131 is not covered by structures of the ear, and at the same time the sound outlet opening 112 is arranged as close as possible to the ear canal and is not covered.Accordingly, the ratio of the distance between the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane, to the distance between the projection point O1' of the center O1 of the first pressure relief opening 1131 onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane, can lie within a suitable range. In some embodiments, it is provided that the ratio of the distance between the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane, to the distance between the projection point O1' of the center O1 of the first pressure relief opening 1131 onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane, can be in the range of 0.10 to 0.35.In some embodiments, the ratio of the distance between the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane to the distance between the projection point O1' of the center O1 of the first pressure relief opening 1131 onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane is in the range of 0.15 to 0.28. In some embodiments, the ratio of the distance between the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane to the distance between the projection point O1' of the center O1 of the first pressure relief opening 1131 onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane is in the range of 0.18 to 0.25.In some embodiments, the ratio of the distance between the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane to the distance between the projection point O1' of the center O1 of the first pressure relief opening 1131 onto the sagittal plane and the centroid B of the projection of the ear canal opening onto the sagittal plane is in the range of 0.19 to 0.22.

[0124] Provided that the insertion of at least part of the sound-generating element 11 into the cavum conchae is ensured, in some embodiments in conjunction with Fig. Figures 14 to 16 provide that the distance between the center O of the sound outlet opening 112 and the upper apex M of the ear hook 12, when the earphone 10 is worn by the user, is in the range of 22.5 mm to 34.5 mm, so that the projection of the sound outlet opening 112 onto the sagittal plane can lie partially or completely within the region of the conchal cavity. In some embodiments, the upper apex of the ear hook 12 is a position where, when the open-ear earphone is worn by the user, a specific point on an outer profile of the ear hook has a maximum distance relative to the user's neck in the direction of the vertical axis, such as the one shown in Figure 14 to 16. Fig. Figure 14 shows the apex M. In some embodiments, the upper apex of the ear hook 12 can also be the highest point of an inner profile of the ear hook along the vertical axis of the user when worn. In some embodiments, the distance between the center O of the sound outlet 112 and the upper apex M of the ear hook 12 is in the range of 25 mm to 32 mm when the ear hook 10 is worn by the user. In some embodiments, the distance between the center O of the sound outlet 112 and the upper apex M of the ear hook 12 is in the range of 27.5 mm to 29.5 mm when the ear hook 10 is worn by the user.In some embodiments, the distance between the center O of the sound outlet 112 and the upper apex M of the ear hook 12 is in the range of 28 mm to 29 mm when the ear hook 10 is worn by the user. In some embodiments, the distance between the projection point O' of the center O of the sound outlet 112 onto the sagittal plane and a projection point M' of the upper apex M of the ear hook 12 onto the sagittal plane is in the range of 18 mm to 30 mm when the ear hook 10 is worn by the user. In some embodiments, the distance between the projection of the center O of the sound outlet 112 onto the sagittal plane and the projection of the upper apex M of the ear hook 12 onto the sagittal plane is in the range of 20 mm to 25 mm when the ear hook 10 is worn by the user.It should be noted that, in the present description, the distance between the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane and a specific point (for example, the projection point M' of the upper vertex M of the ear hook 12 onto the sagittal plane) can be determined by the following exemplary methods when the earphone is worn. When worn, several components (for example, the sound-generating part 11, the first part 121 of the ear hook, and the second part 122 of the ear hook) of the earphone 10 can be attached to a fixing element by a fastening element or an adhesive, and then the models of the head or the structures of the auricle are removed. The earphone 10, fixed to the fixing element, is shown on a side facing the ear, and its position is the same as its position when worn.The position of the projection point O' of the center O of the sound outlet opening 112 on the sagittal plane can be determined. Furthermore, it is provided that the distance between the projection point O' of the center O of the sound outlet opening 112 on the sagittal plane and the determined point can be determined.

[0125] In some embodiments, the distance between the center O1 of the first pressure relief opening 1131 and the upper apex M of the ear hook 12 should not be too small, in order to prevent the first pressure relief opening 1131 from being obscured when the sound-generating part 11 protrudes into the concha. Furthermore, the distance between the center O1 of the first pressure relief opening 1131 and the upper apex M of the ear hook 12 should also not be too large if the sound-generating part 11 can protrude at least partially into the concha. In some embodiments, the distance between the center O1 of the first pressure relief opening 1131 and the upper apex M of the ear hook 12 is in the range of 16.15 mm to 24.25 mm.In some embodiments, the distance between the center O1 of the first pressure relief opening 1131 and the upper apex M of the ear hook 12 is in the range of 17.55 mm to 23.25 mm. In some embodiments, the distance between the center O1 of the first pressure relief opening 1131 and the upper apex M of the ear hook 12 is in the range of 19.55 mm to 20.55 mm. In some embodiments, the positional relationship between the center O1 of the first pressure relief opening 1131 and the upper apex M of the ear hook 12 can also be characterized by the distance between the projection point O1' of the center O1 of the first pressure relief opening 1131 onto the sagittal plane and the projection point M' of the upper apex M of the ear hook 12 onto the sagittal plane.For example, in some embodiments, the distance between the projection point O1' of the center O1 of the first pressure relief opening 1131 onto the sagittal plane and the projection point M' of the upper vertex M of the ear hook 12 onto the sagittal plane is in the range of 15.83 mm to 23.75 mm. In some embodiments, the distance between the projection point O1' of the center O1 of the first pressure relief opening 1131 onto the sagittal plane and the projection point M' of the upper vertex M of the ear hook 12 onto the sagittal plane is in the range of 18 mm to 20 mm.

[0126] In some embodiments, the ratio of the distance between the center O of the sound outlet opening 112 and the upper apex M of the ear hook 12 to the distance between the center O1 of the first pressure relief opening 1131 and the upper apex M of the ear hook 12 is in the range of 1.10 to 1.70, as described in the wearing method in Fig. 14. In some embodiments, the ratio of the distance between the center O of the sound outlet opening 112 and the upper apex M of the ear hook 12 to the distance between the center O1 of the first pressure relief opening 1131 and the upper apex M of the ear hook 12 in the user-worn earphone 10 is in the range of 1.25 to 1.65. Preferably, the ratio of the distance between the center O of the sound outlet opening 112 and the upper apex M of the ear hook 12 to the distance between the center O1 of the first pressure relief opening 1131 and the upper apex M of the ear hook 12 is in the range of 1.35 to 1.55.In some embodiments, it is provided that a relative positional relationship between the center O of the sound outlet opening 112, the upper vertex M of the ear hook 12 and the center O1 of the first pressure relief opening 1131 can also be characterized by the ratio of the distance between the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane and the projection point M' of the upper vertex M of the ear hook 12 onto the sagittal plane to the distance between the center O1 of the first pressure relief opening 1131 and the upper vertex M of the ear hook 12.In some embodiments, for example, it is provided that the ratio of the distance between the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane and the projection point M' of the upper vertex M of the ear hook 12 onto the sagittal plane to the distance between the center O1 of the first pressure relief opening 1131 and the upper vertex M of the ear hook 12 is in the range of 1.11 to 1.71, as described in the carrying method in . Fig. 14. In some embodiments, the ratio of the distance between the projection point O' of the center O of the sound outlet opening 112 onto the sagittal plane and the projection point M' of the upper vertex M of the ear hook 12 onto the sagittal plane to the distance between the center O1 of the first pressure relief opening 1131 and the upper vertex M of the ear hook 12 is in the range of 1.35 to 1.50.

[0127] The description of the above earphone 10 serves only for illustrative purposes and is not intended to limit the scope of this application. For the person skilled in the art, various changes and modifications can be made according to the description in this application. For example, if only one pressure relief opening is provided on the sound-generating part 11, the pressure relief opening can be any of the first pressure relief openings 1131 and the second pressure relief openings 1132. For example, the pressure relief opening can be the first pressure relief opening 1131 described above. That is, the pressure relief opening can be provided on the top surface US. The pressure relief opening can be considered an existing and only point sound source outside the area described in the application. Fig. The chamber structure 41 shown in Figure 10 is considered. It is intended that the ratio of the distance between the center O of the sound outlet opening 112 and the center point of the upper boundary of the inner surface IS to the distance between the center of the pressure relief opening and the center point of the upper boundary of the inner surface IS is in the range of 1.3 to 2.1. These changes and modifications fall within the scope of protection of the present application.

[0128] Fig. Figure 17 shows a schematic structural representation of the housing of the earphone according to some embodiments of the present description.

[0129] As in Fig. As shown in Figure 17, the sound outlet opening 112, the first pressure relief opening 1131, and the second pressure relief opening 1132 can, in some embodiments, have a raceway shape, wherein the two ends of the raceway shape can have a secondary arc shape or a semicircular shape. In some embodiments, the sound outlet opening 112, the first pressure relief opening 1131, and the second pressure relief opening 1132 are designed as straight cylindrical structures. To facilitate machining and manufacturing and to reduce the complexity of the process, in some embodiments, the sound outlet opening 112, the first pressure relief opening 1131, and the second pressure relief opening 1132 can be designed as horn-shaped structures.For example, the area of ​​an inner opening is smaller than the area of ​​a corresponding outer opening, or the area of ​​the outer opening is smaller than the area of ​​the corresponding inner opening. It should be noted that the sound outlet opening 112, the first pressure relief opening 1131, and the second pressure relief opening 1132 may, but are not limited to, having a round shape, an oval shape, a raceway shape, or the like. To facilitate the description, the present description is illustrated by the example of a configuration of the sound outlet opening 112, the first pressure relief opening 1131, and the second pressure relief opening 1132 as a raceway-shaped, straight cylindrical structure.The maximum dimension of the sound outlet opening 112 in the width direction Y is defined as its corresponding dimension of the short axis (width), and the maximum dimensions of the first pressure relief opening 1131 and the second pressure relief opening 1132 in the thickness direction Z are defined as their corresponding dimensions of the short axis (widths). The maximum dimensions of the sound outlet opening 112, the first pressure relief opening 1131, and the second pressure relief opening 1132 in the X direction of the long axis are defined as their corresponding dimensions of the long axis (lengths). The dimension of the sound outlet opening 112 in the thickness direction Z is defined as its corresponding depth, and the dimensions of the first pressure relief opening 1131 and the second pressure relief opening 1132 in the width direction Y are defined as their corresponding depths.

[0130] In some embodiments, the resonant frequency f1 of the earphone's front chamber is set to a high frequency when the area S3 of the outer opening (hereinafter referred to simply as the area) of the sound outlet 112 is increased or the depth D3 of the sound outlet 112 is reduced. During diaphragm vibration, this causes the air in the front chamber to be compressed or expanded in sync with the diaphragm's vibration. The compressed or expanding air can cause the air column at the sound outlet to move back and forth, which in turn causes the air column to radiate sound outwards. In some embodiments, the air column within the sound outlet 112 is provided to have a mass that can correspond to the acoustic mass of the sound outlet 112.The acoustic mass can serve as a component of the acoustic impedance to influence the acoustic output of the sound-generating part 11. Therefore, the dimensions of the sound outlet opening 112 also affect the acoustic mass Ma of the sound outlet opening 112. In particular, increasing the area S3 of the sound outlet opening 112 or reducing the depth D3 reduces the acoustic mass Ma of the sound outlet opening 112.

[0131] In some embodiments, the area S3 of the sound outlet opening 112 must lie within a suitable range to ensure the acoustic mass Ma of the sound outlet opening 112 while simultaneously increasing the resonance frequency f1 of the front chamber. Furthermore, an excessively large area S3 of the sound outlet opening 112 could have certain effects on the appearance, structural strength, and other aspects of the earphone 10. Therefore, in some embodiments, the area S3 of the sound outlet opening 112 is specified to be within the range of 2.87 mm². 2 up to 46.10 mm 2 It may lie. In some embodiments, it is provided that the area S3 of the sound outlet opening 112 is in the range of 2.875 mm. 2 up to 46 mm 2 It may lie. In some embodiments, it is provided that the area S3 of the sound outlet opening 112 is in the range of 8 mm. 2 up to 30 mm2 It may lie. In some embodiments, it is provided that the area S3 of the sound outlet opening 112 is within the range of 10 mm. 2 up to 26 mm 2 It may lie. It is only by way of example that the area S3 of the sound outlet opening 112 is in the value range of 11 mm. 2 up to 15 mm 2 It can be, for example, 11.49 mm 2 For example, it is also stipulated that the area S3 of the sound outlet opening 112 is within the range of 25 mm. 2 up to 26 mm 2 It can be, for example, 25.29 mm 2 .

[0132] To ensure that the front chamber has a sufficiently high resonant frequency, the depth D3 of the sound outlet opening 112 should be as small as possible. However, since the sound outlet opening 112 is located within the housing 111, its depth D3 corresponds to the thickness of the housing 111. If the thickness of the housing 111 is too small, the structural integrity of the earphone 10 could be compromised. Furthermore, the corresponding machining technique is relatively difficult. In some embodiments, the depth D3 of the sound outlet opening 112 can range from 0.3 mm to 3 mm. In some embodiments, the depth D3 of the sound outlet opening 112 can range from 0.3 mm to 2 mm. In some embodiments, the depth D3 of the sound outlet opening 112 can range from 0.3 mm to 1 mm.

[0133] In some embodiments, it is provided that the corresponding square ratio S3 / D3 2 The area S3 to the depth D3 of the corresponding sound outlet opening 112 can lie in the value range of 0.31 to 512.2, if the area of ​​the sound outlet opening 112 is in the value range of 2.875 mm 2 up to 46 mm 2 The depth D3 of the sound outlet opening 112 can be in the range of 0.3 mm to 3 mm. In some embodiments, the square ratio S3 / D3 is provided. 2 The ratio of the area S3 to the depth D3 of the sound outlet opening 112 can be in the range of 1 to 400. In some embodiments, the square ratio S3 / D3 is provided for. 2 The ratio of the area S3 to the depth D3 of the sound outlet opening 112 can be in the range of 3 to 300. In some embodiments, the square ratio S3 / D3 is provided for. 2The ratio of the area S3 to the depth D3 of the sound outlet opening 112 can be in the range of 5 to 200. In some embodiments, the square ratio S3 / D3 is provided for. 2 The distance between the area S3 and the depth D3 of the sound outlet opening 112 can be in the range of 10 to 50.

[0134] In some embodiments, the resonant frequency of the earphone 10 corresponding to the rear chamber is designed to gradually shift towards the high frequency, and the flat region of the frequency response curve is designed to broaden as other structures (for example, the sound outlet 112 and the like) are attached and the areas of the pressure relief openings 113 (for example, the first pressure relief opening 1131 and / or the second pressure relief opening 1132) are gradually increased. Furthermore, in practical applications, excessively large areas of the first pressure relief opening 1131 and / or the second pressure relief opening 1132 can negatively impact the appearance, structural strength, water and dust resistance, and other aspects of the earphone 10. Therefore, the area S1 of the first pressure relief opening 1131 and / or the area S1 of the second pressure relief opening 1132 should not be too large.In some embodiments, the area of ​​the first pressure relief opening 1131 is in the range of 3.78 mm. 2 up to 86.21 mm 2 lies, and that the area of ​​the second pressure relief opening 1132 is in the range of 2.78 mm 2 up to 54.68 mm 2 In some embodiments, the area of ​​the first pressure relief opening 1131 is in the range of 3.78 mm. 2 up to 22.07 mm 2 lies, and that the area of ​​the second pressure relief opening 1132 is in the range of 2.78 mm 2 up to 16.07 mm 2 In some embodiments, the area of ​​the first pressure relief opening 1131 is in the range of 6.78 mm. 2 up to 20.07 mm 2 lies, and that the area of ​​the second pressure relief opening 1132 is in the range of 4.78 mm 2 up to 13.07 mm 2 lies.

[0135] Because the first pressure relief opening 1131, the second pressure relief opening 1132, and the sound outlet opening 112 are provided in the housing 111, in some embodiments the depth D1 of the first pressure relief opening 1131 and the depth D2 of the second pressure relief opening 1132 can be identical to the depth D3 of the sound outlet opening 112 to facilitate machining and design. In some embodiments, the depth D1 of the first pressure relief opening 1131 (or the depth D2 of the second pressure relief opening 1132) can be in the range of 0.3 mm to 3 mm. In some embodiments, the depth D1 of the first pressure relief opening 1131 (or the depth D2 of the second pressure relief opening 1132) can be in the range of 0.3 mm to 2 mm. In some embodiments, it is provided that the depth D1 of the first pressure relief opening 1131 (orthe depth D2 of the second pressure relief opening 1132) can have a value of 0.3 mm to 1 mm.

[0136] To enable the second sound loss formed by the pressure relief openings 113 and the first sound loss formed by the sound outlet opening 112 in the far field to better cancel each other out, in some embodiments the resonance frequency f2 of the rear chamber and the resonance frequency f1 of the front chamber 114 can be approximately or equal. According to formula (2), the ratio is f1f2 the resonance frequency f1 of the front chamber 114 to the resonance frequency f2 of the rear chamber: f1f2=c2πS1V1L1c2πS2V2L2=S1V1L1⋅V2L2S2=S1S2⋅V2V1⋅L2L1.

[0137] According to formula (2), the ratio of the resonance frequency f1 of the front chamber 114 to the resonance frequency f2 of the rear chamber can depend on the ratio of the volumes of the front and rear chambers, the ratio of the opening area of ​​the sound outlet opening 112 to the opening areas of the pressure relief openings 113, and the ratio of the depth of the sound outlet opening 113 to the depths of the pressure relief openings 113.Based on some of its parameters (for example, the ratio of the opening area of ​​the sound outlet 112 to the opening areas of the acoustic openings 113), ranges for other parameters (for example, the ratio of the volumes of the front chamber and the rear chamber) can be set so that the second sound loss formed by the pressure relief openings 113 and the first sound loss formed by the sound outlet 112 in the far field can better cancel each other out in order to improve the output effect of the earphone 10.

[0138] In some embodiments, both the ratio of the area S3 to the depth D3 of the sound outlet opening 112 and the ratio of the total area of ​​the pressure relief openings 113 to their respective depths are in the range of 1.10 to 1.75, so that the ratio of the resonance frequency of the front chamber to the resonance frequency of the rear chamber is in the range of 0.5 to 1.5. In some embodiments, both the ratio of the area S3 to the depth D3 of the sound outlet opening 112 and the ratio of the total area of ​​the pressure relief openings 113 to their respective depths are in the range of 1.25 to 1.65, so that the ratio of the resonance frequency of the front chamber to the resonance frequency of the rear chamber is in the range of 0.7 to 1.3.In some embodiments, it is provided that both the ratio of the area S3 to the depth D3 of the sound outlet opening 112 and the ratio of the total area of ​​the pressure relief openings 113 to their respective depths are in the range of 1.35 to 1.55, so that the ratio of the resonance frequency of the front chamber to the resonance frequency of the rear chamber is in the range of 0.8 to 1.2.

[0139] In some embodiments, the shape of the sound outlet opening 112 could also affect its acoustic resistance. For example, the narrower the sound outlet opening 112, the greater its acoustic resistance, which negatively impacts the acoustic output of the front chamber. To ensure good output at low frequencies through the sound outlet opening 112 and also to increase the volume of the sound emitted through the sound outlet opening 112, the ratio of the dimension L3 of the long axis to the dimension W3 of the short axis of the sound outlet opening 112, or the aspect ratio of the sound outlet opening 112, must lie within a predetermined, suitable range.In some embodiments, for a fixed area of ​​the sound outlet opening 112, the aspect ratio of the sound outlet opening 112 can be in the range of 1 to 10 to ensure that the frequency response curve of the front chamber exhibits a strong frequency response at low frequencies. In some embodiments, the aspect ratio of the sound outlet opening 112 can be 2 to 7. In some embodiments, the aspect ratio of the sound outlet opening 112 can be 2 to 3. In some embodiments, the aspect ratio of the sound outlet opening 112 can be 2. To enable the resonance frequency of the resonance peak of the front chamber to be as high as possible, the length L3 of the sound outlet opening 112 can have a relatively large value in some embodiments.However, in order to simultaneously avoid reducing the output corresponding to the resonance peak of the front chamber at high frequencies and to ensure the structural stability of the sound-generating part 11, the length L3 of the sound outlet opening 112 cannot exceed 17 mm and the width W3 of the sound outlet opening 112 cannot exceed 10 mm. In some embodiments, the length L3 of the sound outlet opening 112 can range from 2 mm to 11 mm. In some embodiments, the length L3 of the sound outlet opening 112 can range from 3 mm to 11 mm. In some embodiments, the length L3 of the sound outlet opening 112 can range from 3 mm to 16 mm. In some embodiments, the length L3 of the sound outlet opening 112 can range from 5 mm to 13 mm. In some embodiments, the length L3 of the sound outlet opening can be 112 6 mm to 9 mm.

[0140] In some embodiments, the width W3 of the sound outlet opening 112 can be determined based on the length L3 and the aspect ratio. For example, if the aspect ratio of the sound outlet opening 112 is 2, the width W3 of the sound outlet opening 112 can be from 1.5 mm to 5.5 mm. Accordingly, the area of ​​the track-shaped sound outlet opening 112 can be 4.02 mm². 2 up to 54 mm 2 The length L3 of the sound outlet opening 112 can be adjusted to suit the structural design of the sound-generating element 11 while simultaneously increasing the flat area of ​​the frequency response curve to improve the sound quality of the earphone 10. For example, the area of ​​the track-shaped sound outlet opening 112 is approximately 11.5 mm². 2Accordingly, it can be determined that the length L3 of the sound outlet opening 112 is 5 mm to 6 mm and the width W3 of the sound outlet opening 112 is 2.5 mm to 3 mm. Within the above dimensional ranges, the earphone 10 is able to exhibit a flat frequency response curve across a wide frequency range and sufficient output at high frequencies. Furthermore, the surface area is relatively small, which is also advantageous for structural stability.

[0141] Combined with Fig. In some embodiments, as shown in figures 14 to 16, the center of the sound outlet opening 112 is located in or near the perpendicular plane of the line connecting the center of the first pressure relief opening 1131 with the center of the second pressure relief opening 1132, and the sound outlet opening 112 is not located in the center position, but rather on a side of the housing 111 in the Y-direction that is close to the second pressure relief opening 1132. Because the sound outlet opening 112 is located near the external auditory canal, the second pressure relief opening 1132 is closer to the external auditory canal and the first pressure relief opening 1131 is farther from it. In comparison to the first pressure relief opening 1131, the sound wave propagated from the second pressure relief opening 1132 more easily cancels out the sound wave propagated from the sound outlet opening 112 in the near field.This allows the sound pressure amplitude at the second pressure relief opening 1132 to be smaller than the sound pressure amplitude at the first pressure relief opening 1131, which in turn increases the perceived loudness at the ear canal. In some embodiments, the acoustic resistance of the second pressure relief opening 1132 can be greater than that of the first pressure relief opening 1131. For example, the dimensions of the second pressure relief opening 1132 can be smaller than those of the first pressure relief opening 1131, so that the acoustic resistance of the second pressure relief opening 1132 can be relatively higher. For example, the area of ​​the first pressure relief opening 1131 can be larger than the area of ​​the second pressure relief opening 1132.

[0142] In some embodiments, the volumes of the front and rear chambers of the sound-generating part 11 are designed to be neither too large nor too small, provided that a sufficiently high sound-generating power of the sound-generating part 11 is ensured and the sound-generating part can be inserted, at least partially, into the cavum conchae. The ratio of the area of ​​the sound outlet opening 112 to the total area of ​​the pressure relief openings 113 (for example, the sum of the areas of the first pressure relief opening 1131 and the second pressure relief opening 1132) is between 0.3 and 0.9, so that the ratio of the resonance frequency of the front chamber to the resonance frequency of the rear chamber is in the range of 0.3 to 1.7.In some embodiments, the ratio of the area of ​​the sound outlet opening 112 to the total area of ​​the pressure relief openings 113 is between 0.5 and 0.85, so that the ratio of the resonance frequency of the front chamber to the resonance frequency of the rear chamber is in the range of 0.5 to 1.5. In some embodiments, the ratio of the area of ​​the sound outlet opening 112 to the total area of ​​the pressure relief openings 113 is between 0.6 and 0.8, so that the ratio of the resonance frequency of the front chamber to the resonance frequency of the rear chamber is in the range of 0.7 to 1.3.In some embodiments, the ratio of the area of ​​the sound outlet opening 112 to the total area of ​​the pressure relief openings 113 is between 0.65 and 0.75, so that the ratio of the resonance frequency of the front chamber to the resonance frequency of the rear chamber is in the range of 0.8 to 1.2.

[0143] In some embodiments, the ratio of the area S3 of the sound outlet opening 112 to the area of ​​the pressure relief opening is between 0.5 and 1.5 when the earphone 10 includes only one pressure relief opening. In some embodiments, the ratio of the area S3 of the sound outlet opening 112 to the area of ​​the pressure relief opening is between 0.6 and 1.3 when the earphone 10 includes only one pressure relief opening. In some embodiments, the ratio of the area S3 of the sound outlet opening 112 to the area of ​​the pressure relief opening is between 0.65 and 1.25 when the earphone 10 includes only one pressure relief opening. In some embodiments, the ratio of the area S3 of the sound outlet opening 112 to the area of ​​the pressure relief opening is between 0.7 and 1.2 when the earphone 10 includes only one pressure relief opening.

[0144] Fig. Figure 18 shows an isoline diagram of the volume ratio of a front chamber to a rear chamber, as well as the ratio of the opening area of ​​the sound outlet to the opening area of ​​the pressure relief opening according to some embodiments described in this document. As in Fig. As shown in Figure 18, in some embodiments the range for the ratio of the resonance frequencies of the front and rear chambers can depend on the ratio of the area of ​​the sound outlet opening to the areas of the pressure relief openings, as well as the ratio of the volumes of the front and rear chambers. By adjusting the ratio of the area of ​​the sound outlet opening to the areas of the pressure relief openings and the ratio of the volumes of the front and rear chambers, it is thus possible to keep the ratio of the resonance frequencies of the front and rear chambers within a target range. See Figure 18. Fig. 18. For example, if the ratio f1 / f2 of the resonance frequency f1 of the front chamber to the resonance frequency f2 of the rear chamber is in the range of 0.1 to 5, the opening area S3 of the sound outlet opening 112 can be smaller than the total opening area S 1+2the first pressure relief opening 1131 and the second pressure relief opening 1132. For example, the ratio S3 / S 1+2 the opening area S3 of the sound outlet opening 112 to the total opening area S 1+2 The values ​​of the first pressure relief opening 1131 and the second pressure relief opening 1132 are in the range of 0.1 to 0.99, and the ratio V2 / V1 of the volume V2 of the rear chamber to the volume V1 of the front chamber can be in the range of 0.1 to 10. Furthermore, if, for example, the ratio f1 / f2 of the resonance frequency f1 of the front chamber to the resonance frequency f2 of the rear chamber can be in the range of 0.5 to 2, then the ratio S3 / S 1+2 the opening area S3 of the sound outlet opening 112 to the total opening area S 1+2the first pressure relief opening 1131 and the second pressure relief opening 1132 are between 0.2 and 0.7, and the ratio V2 / V1 of the volume V2 of the rear chamber to the volume V1 of the front chamber can be in the range of 1 to 7.

[0145] In some embodiments, the opening area S3 of the sound outlet opening 112 is provided to be larger than the total opening area S 1+2 the first pressure relief opening 1131 and the second pressure relief opening 1132. For example, the ratio S3 / S 1+2 the opening area S3 of the sound outlet opening 112 to the total opening area S 1+2 The first pressure relief opening 1131 and the second pressure relief opening 1132 may be in the range of 1 to 10, and the ratio V2 / V1 of the volume V2 of the rear chamber 116 to the volume V1 of the front chamber 114 may be in the range of 0.1 to 10. According to Fig. 18 The corresponding ratio f1 / f2 of the resonance frequency f1 of the front chamber 114 to the resonance frequency f2 of the rear chamber 116 can be in the range of 0.5 to 10. For example, the ratio S3 / S 1+2 the opening area S3 of the sound outlet opening 112 to the total opening area S 1+2 The first pressure relief opening 1131 and the second pressure relief opening 1132 may be between 3 and 9, and the ratio V2 / V1 of the volume V2 of the rear chamber 116 to the volume V1 of the front chamber 114 may be in the range of 2 to 6. According to Fig. 18 The ratio f1 / f2 of the resonance frequency f1 of the front chamber 114 to the resonance frequency f2 of the rear chamber 116 can be in the range of 1 to 8.

[0146] With reference to the in Fig. In some embodiments, the isolines shown in 18 are provided for, namely that the value range for S3 / S 1+2based on V2 / V1 or the value range for V2 / V1 based on S3 / S 1+2 can be determined such that the resonance frequency f2 of the rear chamber and the resonance frequency f1 of the front chamber can be approximately or equal. Thus, the second sound loss formed by the pressure relief openings 113 and the first sound loss formed by the sound outlet opening 112 in the far field can better cancel each other out, thereby improving the output performance of the earphone 10. As can be seen from formula (2), for example, the volume V2 of the rear chamber can be relatively small; for example, V2 / V1 can be less than 1 so that the rear chamber has a sufficiently large resonance frequency f2. In conjunction with Fig. 18 can S3 / S 1+2in the range of 1 to 2.5, if the resonance frequency f2 of the rear chamber and the resonance frequency f1 of the front chamber can be approximately or equal (for example, the value for f1 / f2 is approximately 1).

[0147] The volume V1 of the front chamber can be given as an example of approximately 190 mm³. 3 up to 220 mm 3 The volume V2 of the rear chamber can be in the range of 60 mm³. 3 up to 80 mm 3 Accordingly, the value for V2 / V1 can range from 0.2 to 0.4 in some embodiments. In some embodiments, the value for V2 / V1 can range from 0.25 to 0.45.

[0148] In conjunction with the above content, some embodiments provide for a range for the S3 / S ratio. 1+2 the opening area S3 of the sound outlet opening 112 to the total opening area S 1+2The first pressure relief opening 1131 and the second pressure relief opening 1132 can be adjusted so that the earphone has good sound emission. For example, the length L3 of the sound outlet opening 112 can be adjusted from 3 mm to 11 mm, the ratio of the length L3 to the width W3 of the cross-sectional area of ​​the sound outlet opening 112 can be adjusted from 2 mm², and the corresponding area of ​​the track-shaped sound outlet opening 112 can be adjusted from 4.02 mm². 2 up to 54 mm 2 The length L1 of the first pressure relief opening 1131 can be 6 mm, the width W2 can be 1.5 mm, and the corresponding area of ​​the first pressure relief opening 1131 can be 8.51 mm². 2 The length L2 of the second pressure relief opening 1132 can be 3 mm, the width W2 can be 1.5 mm, and the corresponding area of ​​the second pressure relief opening 1132 can be 4.02 mm². 2 The ratio S3 / S can therefore be 1+2the opening area S3 of the sound outlet opening 112 to the total opening area S 1+2 The dimensions of the first pressure relief opening 1131 and the second pressure relief opening 1132 can range from 0.32 to 4.31. For example, the length L1 of the first pressure relief opening 1131 can be from 2 mm to 8 mm, the width W1 1.5 mm, and the area of ​​the first pressure relief opening 1131 2.517 mm². 2 up to 11.5171 mm 2 The length L2 of the second pressure relief opening 1132 can be 3 mm to 6 mm, the width W2 can be 1.5 mm, and the area of ​​the second pressure relief opening 1132 can be 4.017 mm². 2 up to 8.5171 mm 2 The length L3 of the sound outlet opening 112 can be 5 mm, the width W3 can be 2.5 mm, and the corresponding area S3 can be 11.16 mm². 2 The ratio S3 / S 1+2 the opening area S3 of the sound outlet opening 112 to the total opening area S 1+2The difference between the first pressure relief opening 1131 and the second pressure relief opening 1132 is therefore 0.56 to 1.71.

[0149] Combined with Fig. 18 f1 / f2 lies in the range of 0.5 to 1.5, if V2 / V1 lies in the range of 0.25 to 0.45 and S3 / S 2+2 f1 / f2 lies in the range of 0.32 to 4.31. f1 / f2 lies in the range of 0.5 to 0.9, if V2 / V1 lies in the range of 0.25 to 0.45 and S3 / S 1+2 in the range of 0.56 to 1.71. It is evident that the volume ratio and / or the area ratio can be determined based on the above ranges, so that the resonance frequency f2 of the rear chamber and the resonance frequency f1 of the front chamber can be approximately or equal.

[0150] Fig. Figure 19 shows a diagram of frequency response curves corresponding to different volume levels at a sound outlet opening according to some embodiments of the present description. Fig. Figure 20 shows a diagram of frequency response curves corresponding to different volume levels at a first pressure relief opening according to some embodiments of the present description, and Fig. Figure 21 shows a diagram of frequency response curves corresponding to different volume levels at a second pressure relief opening according to some embodiments described in this document. As in Fig. As shown in Figures 19 to 21, the sound pressure at the sound outlet opening 112, the sound pressure at the first pressure relief opening 1131 and the sound pressure at the second pressure relief opening 1132 gradually decrease with the gradually decreasing volume from the maximum volume.

[0151] It should be noted that the sound pressure at sound outlet 112, the sound pressure at the first pressure relief opening 1131, and the sound pressure at the second pressure relief opening 1132 each represent the sound pressure at a distance of 4 mm from sound outlet 112, the sound pressure at a distance of 4 mm from the first pressure relief opening 1131, and the sound pressure at a distance of 4 mm from the second pressure relief opening 1132, respectively. During the sound pressure measurement at each opening, the other openings are not blocked. For example, when the sound pressure at sound outlet 112 is measured, the first pressure relief opening 1131 and the second pressure relief opening 1132 are not covered or blocked.

[0152] Combined with Fig. In some embodiments, as described in sections 10 to 13, the chamber structure is designed so that the sound wave emitted through the pressure relief openings (the first pressure relief opening 1131 and the second pressure relief opening 1132) and the sound loss generated by the sound outlet opening 112 in the far field can cancel each other out. This reduces sound loss in the far field, and the sound wave emitted through the pressure relief openings has a minimal impact on near-field hearing. Thus, in some embodiments, the sound pressure amplitude at the pressure relief opening 113 (of the first pressure relief opening 1131 and the second pressure relief opening 1132) and the sound pressure amplitude at the sound outlet opening 112 are approximately equal, ensuring that near-field hearing is not affected while effectively reducing sound loss in the far field.In some embodiments, the ratio of the sound pressure at the sound outlet opening 112 to the sound pressure at the first pressure relief opening 1131 can be in the range of 0.8 to 1.2 within a specific frequency range (for example, in the range of 3.5 kHz to 4.5 kHz) in order to effectively reduce sound loss in the far field. In some embodiments, the ratio of the sound pressure at the sound outlet opening 112 to the sound pressure at the first pressure relief opening 1131 can be in the range of 0.9 to 1.1. In some embodiments, the ratio of the sound pressure at the sound outlet opening 112 to the sound pressure at the first pressure relief opening 1131 can be in the range of 0.95 to 1.05.In some embodiments, the ratio of the sound pressure at the sound outlet opening 112 to the sound pressure at the second pressure relief opening 1132 can be in the range of 0.8 to 1.2 in order to effectively reduce sound loss in the far field. In some embodiments, the ratio of the sound pressure at the sound outlet opening 112 to the sound pressure at the second pressure relief opening 1132 can be in the range of 0.9 to 1.1. In some embodiments, the ratio of the sound pressure at the sound outlet opening 112 to the sound pressure at the second pressure relief opening 1132 can be in the range of 0.95 to 1.05.In some embodiments, the ratio of the sound pressure at the sound outlet opening 112 to the total sound pressure at the first pressure relief opening 1131 and the second pressure relief opening 1132 can be in the range of 0.4 to 0.6 in order to effectively reduce sound loss in the far field. In some embodiments, the ratio of the sound pressure at the sound outlet opening 112 to the total sound pressure at the first pressure relief opening 1131 and the second pressure relief opening 1132 can be in the range of 0.45 to 0.55. It can be seen that the sound pressure at the sound outlet opening 112, the sound pressure at the first pressure relief opening 1131, and the sound pressure at the second pressure relief opening 1132 are the respective individual sound pressures at the same volume and corresponding frequencies.

[0153] Combined with Fig. Figures 19 to 21 stipulate that, at a maximum volume of 4000 Hz, the sound pressure at the sound outlet opening 112 is 103.54 dB, the sound pressure at the first pressure relief opening 1131 is 104.5 dB, and the sound pressure at the second pressure relief opening 1132 is 100.74 dB. The sound pressure at the sound outlet opening 112, the sound pressure at the first pressure relief opening 1131, and the sound pressure at the second pressure relief opening 1132 are approximately equal, thus effectively reducing sound loss in the far field.

[0154] In some embodiments, the difference (S1-S2) of the area S1 of the first pressure relief opening 1131 from the area S2 of the second pressure relief opening 1132 should not be too small, whereby the sound pressure of the second pressure relief opening 1132 is reduced (in order to dampen the degree of cancellation of the sound generated by the second pressure relief opening 1132 and the sound generated by the sound outlet opening 112 at the ear canal) and the effect of cancellation of the sound emitted by the second pressure relief opening 1132 and the sound exiting the sound outlet opening 112 via the second leakage structure LC in the far field is ensured.To avoid the difference in sound resistance at the first pressure relief opening 1131 and the second pressure relief opening 1132 influencing the effect on the destruction of the standing wave in the rear chamber, the difference (S1-S2) of the area S2 of the first pressure relief opening 1131 from the area S2 of the second pressure relief opening 1132 should also not be too large. In some embodiments, it is provided that the difference (S1-S2) of the area S2 of the first pressure relief opening 1131 from the area S2 of the second pressure relief opening 1132, as well as the area S3 of the sound outlet opening 112, can have a ratio in the range of 2.5 to 3.9, so that the ratio of the sound pressure at the sound outlet opening 112 to the total sound pressure at the first pressure relief opening 1131 and the second pressure relief opening 1132 is in a suitable range (for example, 0.4 to 0.6).In some embodiments, the ratio of the difference (S1-S2) of the area S2 of the first pressure relief opening 1131 to the area S2 of the second pressure relief opening 1132 to the area S3 of the sound outlet opening 112 can be in the range of 2.7 to 3.7. In some embodiments, the ratio of the difference (S1-S2) of the area S1 of the first pressure relief opening 1131 to the area S2 of the second pressure relief opening 1132 to the area S3 of the sound outlet opening 112 can be in the range of 2.85 to 3.45. In some embodiments, it is provided that the ratio of the difference (S1-S2) of the area S1 of the first pressure relief opening 1131 to the area S2 of the second pressure relief opening 1132 to the area S3 of the sound outlet opening 112 can be in the range of 2.9 to 3.4.In some embodiments, it is provided that the ratio of the difference (S1-S2) of the area S1 of the first pressure relief opening 1131 to the area S2 of the second pressure relief opening 1132 to the area S3 of the sound outlet opening 112 can be in the range of 3.1 to 3.3.

[0155] Fig. Figure 22 shows an exemplary representation of an internal structure of a sound-generating part according to some embodiments of the present description.

[0156] As in Fig. As shown in Figure 22, the sound-generating part 11 can comprise the housing 111 in conjunction with the ear hook 12 and the transducer 116 arranged in the housing 111. In some embodiments, the sound-generating part 11 can further comprise a main control circuit board 13 arranged in the housing 111 and a battery (not shown) located at an end of the ear hook 12 remote from the sound-generating part 11. The battery and the transducer 116 are each electrically connected to the main control circuit board 13 to enable the transducer 116 to be powered by the battery under the control of the main control circuit board 13. Naturally, the battery and the transducer 116 can be arranged within the sound-generating part 11, with the battery being located closer to the connection end CE and the transducer 116 closer to the free end FE.

[0157] In some embodiments, the earphone 10 includes an adjustment mechanism for connecting the sound-generating element 11 to the ear hook 12. This adjustment mechanism allows different users to adjust the relative position of the sound-generating element 11 on the ear while wearing the earphone, ensuring that it is positioned appropriately so that it forms the chamber structure together with the cavum conchae. The adjustment mechanism also allows the user to adjust the earphone 10 for a more stable and comfortable fit.

[0158] Due to the volume and depth of the concha, a certain distance can exist between the inner surface IS of the sound-generating part 11 and the concha after the free end FE projects into the concha. In other words, when worn, the sound-generating part 11, together with the concha, can form the chamber structure communicating with the external auditory canal, with the sound-generating part 11 (for example, the inner surface IS) being provided with the sound outlet 112, and the sound outlet 112 being at least partially located within the chamber structure. In this way, when worn, the sound wave propagating through the sound outlet 112 is limited by the chamber structure; that is, the chamber structure can focus the sound wave.This allows the sound wave to be transmitted more effectively into the outer ear canal, thus improving the volume and sound quality of the sound heard by the user in the near field, which contributes to an improvement in the acoustic performance of the earphone 10. Furthermore, the chamber structure above is designed to be partially open, as the sound-generating element 11 can be adjusted so that it does not block the outer ear canal when worn.In this way, part of the sound wave propagated through the sound outlet opening 112 can spread to the ear canal so that the user can hear the sound, and another part of it can, together with the sound reflected at the ear canal, spread out of the earphone 10 and the ear via a gap between the sound-generating part 11 and the ear (for example, a part of the cavum conchae that is not covered by the sound-generating part 11), resulting in an initial loss of sound in the far field.The sound wave propagated from the pressure relief openings 113 provided in the sound generation part 11 (for example, the first pressure relief opening 1131 and the second pressure relief opening 1132) generally simultaneously creates a second sound loss in the far field, wherein the magnitude of the above first sound loss is comparable to the magnitude of the above second sound loss, and wherein the phase of the above first sound loss and the phase of the above second sound loss are (almost) out of phase, so that the two can cancel each other out in the far field, which contributes to reducing the sound loss of the earphone 10 in the far field.

[0159] In some embodiments, the front chamber 114 can be formed between the transducer 116 and the housing 111, and the sound outlet opening 112 is provided in an area of ​​the housing 111 that surrounds the front chamber 114, with the front chamber 114 communicating with the outside environment via the sound outlet opening 112.

[0160] In some embodiments, the front chamber 114 is located between the diaphragm of the transducer 116 and the housing 111. To ensure sufficient vibration space for the diaphragm, the front chamber 114 can have a greater depth (i.e., a greater distance between the diaphragm of the transducer 116 and the housing 111 directly opposite it). As shown in Fig. As shown in Figure 22, in some embodiments the sound outlet opening 112 is provided in the inner surface IS in the thickness direction Z, where the depth of the front chamber 114 can refer to a dimension of the front chamber 114 in the Z direction. However, if the front chamber 114 has too great a depth, the dimension of the sound-generating part 11 is increased, which impairs the wearing comfort of the earphone 10. In some embodiments, the depth of the front chamber 114 can be between 0.55 mm and 1.00 mm. In some embodiments, the depth of the front chamber 114 can be between 0.66 mm and 0.99 mm. In some embodiments, the depth of the front chamber 114 can be between 0.76 mm and 0.99 mm. In some embodiments, the depth of the front chamber 114 can be between 0.96 mm and 0.99 mm. In some embodiments, the depth of the front chamber 114 can be 0.97 mm.

[0161] To improve the sound generation quality of the earphone 10, the resonant frequency of the structure formed by the front chamber 114 and the sound outlet 112, which functions like a Helmholtz resonator, should be as high as possible so that the overall frequency response curve of the sound generation section has a broad, flat range. In some embodiments, the resonant frequency f1 of the front chamber 114 cannot be lower than 3 kHz. In some embodiments, the resonant frequency f1 of the front chamber 114 cannot be lower than 4 kHz. In some embodiments, the resonant frequency of the front chamber 114 cannot be lower than 6 kHz. In some embodiments, the resonant frequency of the front chamber 114 cannot be lower than 7 kHz. In some embodiments, the resonant frequency of the front chamber 114 cannot be lower than 8 kHz.

[0162] With reference to Fig. In some embodiments, it is provided that sound-absorbing meshes 118 are provided in positions corresponding to the first pressure relief opening 1131 and / or the second pressure relief opening 1132. The sound-absorbing mesh 118 can adjust the amplitude of the resonance frequency of the rear chamber and simultaneously serve as a dust and water seal. In some embodiments, it is provided that the sound-absorbing mesh 118 can also be provided in the position of the sound outlet opening 112, which serves to adjust the corresponding amplitude of the resonance peak of the front chamber 114 and simultaneously as a dust and water seal.

[0163] In some embodiments, the sound-absorbing mesh 118 may comprise a gauze, a steel mesh, or a combination thereof. In some embodiments, the specific acoustic impedance set for the front chamber 114 and the specific acoustic impedance set for the rear chamber 116 may be the same. That is, the sound-absorbing mesh 118 arranged at the sound outlet opening 112 and the sound-absorbing mesh 118 arranged at at least one of the pressure relief openings (for example, the first pressure relief opening 1131 and / or the second pressure relief opening 1132) may have the same specific acoustic impedance.For example, identical sound-absorbing meshes 118 can be arranged at the sound outlet opening 112 and at least one of the pressure relief openings to facilitate structural assembly (for example, to reduce the types of materials and / or avoid mixing materials) and to increase visual uniformity. In some embodiments, the specific acoustic impedance of the sound-absorbing mesh 118 arranged for the front chamber 114 and the specific acoustic impedance of the sound-absorbing mesh 118 arranged for the rear chamber 116 can also be different. That is, the sound-absorbing mesh 118 arranged at the sound outlet opening 112 and the sound-absorbing mesh 118 arranged at at least one of the pressure relief openings can have different specific acoustic impedances. By using other parameters (for example, the area (orBy providing sound-absorbing meshes 118 with different specific acoustic impedances at the front chamber 114 and the rear chamber 116, a predetermined emission effect is achieved, for example, by providing sound-absorbing meshes 118 with different specific acoustic impedances at the front chamber 114 and the rear chamber 116, taking into account the area ratio of the sound outlet opening 112 and the pressure relief openings, the depth or aspect ratio of each opening, etc.

[0164] Once the other parameters of the sound-absorbing mesh 118 are defined, the magnitude of the sound resistance of the sound-absorbing mesh depends on its thickness. Sound-absorbing meshes of different thicknesses have a certain influence on the acoustic emission levels of the respective acoustic openings. Thus, the thickness of the sound-absorbing mesh 118 has a limited range. In some embodiments, the thickness of the sound-absorbing mesh 118 arranged at the first pressure relief opening 1131 and / or the second pressure relief opening 1132 can be in the range of 35 µm to 300 µm. In other embodiments, the thickness of the sound-absorbing mesh 118 arranged at the first pressure relief opening 1131 and / or the second pressure relief opening 1132 can be in the range of 40 µm to 150 µm.In some embodiments, the thickness of the sound-absorbing mesh 118 arranged at the first pressure relief opening 1131 and / or the second pressure relief opening 1132 can be in the range of 50 µm to 65 µm. In other embodiments, the thickness of the sound-absorbing mesh 118 arranged at the first pressure relief opening 1131 and / or the second pressure relief opening 1132 can be in the range of 55 µm to 62 µm. Conversely, the position of the sound-absorbing mesh 118 is closer to the rear chamber, and the volume of the rear chamber is smaller, the greater the distance between an end of the sound-absorbing mesh 118 facing the outside of the housing 111 (i.e., the upper surface of the sound-absorbing mesh 118) and the outer surface of the housing 111.In some embodiments, it is provided that the distance between the upper surface of the sound-absorbing mesh 118 at the first pressure relief opening 1131 and the outer surface of the housing 1111 can be 0.8 mm to 0.9 mm, and that the distance between the upper surface of the sound-absorbing mesh 118 at the second pressure relief opening 1132 and the outer surface of the housing 1111 can be 0.7 mm to 0.8 mm. In some embodiments, the distance between the upper surface of the sound-absorbing mesh 118 at the first pressure relief opening 1131 and the outer surface of the housing 1111 can be 0.82 mm to 0.88 mm, and the distance between the upper surface of the sound-absorbing mesh 118 at the second pressure relief opening 1132 and the outer surface of the housing 1111 can be 0.72 mm to 0.76 mm.In some embodiments, it is provided that the distance between the upper surface of the sound-absorbing mesh 118 at the first pressure relief opening 1131 and the outer surface of the housing 1111 can be 0.86 mm, and that the distance between the upper surface of the sound-absorbing mesh 118 at the second pressure relief opening 1132 and the outer surface of the housing 1111 can be 0.73 mm.

[0165] In some embodiments, it is provided that different types of sound-absorbing meshes 118 could also have different mesh densities, leading to different sound resistances of the respective acoustic openings and thus influencing the emission from different acoustic chambers. Therefore, it is necessary to design the compositions and types of sound-absorbing meshes 118. To increase structural stability while simultaneously sealing against water and dust, some embodiments provide that either steel meshes or a combination of gauze and steel meshes can be used at the first pressure relief opening 1131 and / or the second pressure relief opening 1132 and / or the sound outlet opening 112.To increase the smoothness of the frequency response curve of the sound-generating part 11 and simultaneously provide the sound-generating part 11 with a high output sound pressure, some embodiments provide that the sound-absorbing mesh 118 arranged on the front chamber 114 can be a steel mesh (for example, an etched steel mesh), with a mesh count of 60 to 100. To further reduce the specific acoustic impedance of the sound-absorbing mesh 118 and thus increase the output sound pressure of the sound-generating part 11, some embodiments provide that the sound-absorbing mesh 118 arranged on the front chamber 114 can be a steel mesh with a mesh count of 70 to 90.In order to increase the smoothness of the frequency response curve of the sound-generating part 11 and at the same time to provide the sound-generating part 11 with a high output sound pressure, in some embodiments it is provided that the sound-absorbing mesh 118 arranged on the front chamber 114 can comprise a gauze and a steel mesh (for example, an etched steel mesh), wherein the specific acoustic impedance of the gauze can be in the range of 2 MKS rayls to 50 MKS rayls and the mesh count of the steel mesh can be in the range of 60 to 100.In order to increase the smoothness of the frequency response curve of the sound-generating part 11 and at the same time to provide the sound-generating part 11 with a high output sound pressure, in some embodiments it is provided that the sound-absorbing mesh 118 arranged on the front chamber 114 can comprise a gauze and a steel mesh, wherein the specific acoustic impedance of the gauze can be in the range of 5 MKS rayls to 20 MKS rayls and the mesh count of the steel mesh can be in the range of 70 to 90.To increase the smoothness of the frequency response curve of the sound-generating part 11 and simultaneously provide the sound-generating part 11 with a high output sound pressure, some embodiments provide that the sound-absorbing mesh 118 arranged on the front chamber 114 can comprise a gauze and a steel mesh, wherein the specific acoustic impedance of the gauze can be in the range of 6 to 10 MKS rayls and the mesh count of the steel mesh can be in the range of 75 to 85. In some embodiments, the specific acoustic impedance of the steel mesh can be in the range of 0.1 to 10 MKS rayls if the sound-absorbing mesh 118 arranged on the front chamber 114 is a steel mesh (for example, an etched steel mesh) or a combination of a gauze and a steel mesh.In some embodiments, the specific acoustic impedance of the steel mesh can range from 0.1 MKS rayls to 5 MKS rayls. In some embodiments, the specific acoustic impedance of the steel mesh can range from 0.1 MKS rayls to 3 MKS rayls.

[0166] Fig. Figure 23 shows an exemplary representation of an internal structure of a converter according to some embodiments of the present description.

[0167] As in Fig. As shown in Figure 23, the transducer 116 is housed in the casing 111, the transducer 116 comprising a diaphragm 1161, a voice coil 1162, a basket 1163, and a magnetic circuit assembly 1164. The basket 1163 is arranged to surround the diaphragm 1161, the voice coil 1162, and the magnetic circuit assembly 1164, providing a mounting and fastening platform. The transducer 116 can be connected to the casing 111 via the basket 1163. The diaphragm 1161 covers the voice coil 1162 and the magnetic circuit assembly 1164 in the Z-direction. The voice coil 1162 projects into the magnetic circuit assembly 1164 and is then connected to the diaphragm 1161. A magnetic field generated by the current flowing through the voice coil 1162 interacts with the magnetic field formed by the magnetic circuit arrangement 1164.This causes the membrane 1161 to generate mechanical vibrations that propagate through a medium such as air and produce a sound which is emitted through the sound outlet opening 112.

[0168] In some embodiments, the magnetic circuit arrangement 1164 comprises a magnetically conductive plate 11641, a magnet 11642, and a receptacle 11643. The magnetically conductive plate 11641 and the magnet 11642 are connected to each other. A side of the magnet 11642 facing away from the magnetically conductive plate 11641 is attached to a bottom wall of the receptacle 11643, and a gap exists between the circumferential side of the magnet 11642 and the inner wall of the circumferential side of the receptacle 11643. In some embodiments, the outer wall of the circumferential side of the receptacle 11643 is connected to and fastened to the receptacle 1163. In some embodiments, the receptacle 11643 and the magnetically conductive plate 11641 can both be made of a magnetically conductive material (for example, iron, etc.).

[0169] In some embodiments, the circumferential side of the membrane 1161 can be connected to the basket 1163 via a retaining ring 1165. In some embodiments, the material of the retaining ring 1165 can be stainless steel or another metal to accommodate the machining and manufacturing process of the membrane 1161.

[0170] With reference to Fig. 22 and Fig. In some embodiments, it is provided that the projection area of ​​the diaphragm 1161 in the Z-direction should be as large as possible in order to improve the acoustic output (especially the output at low frequencies) of the sound-generating part 11 and the ability of the diaphragm 1161 to drive the air. However, an excessively large area of ​​the diaphragm 1161 leads to an excessively large transducer 116 and thus to an excessively large housing 111. This can easily lead to contact and friction between the housing 111 and the ear, which impairs the wearing comfort of the sound-generating part 11. Therefore, the housing 111 must be dimensioned accordingly. By way of example, the width dimension of the short axis (which can also be referred to as the width dimension) of the housing 111 in the Y-direction can be determined from the dimension (e.g., 17 mm) of the cavity conchae in the Y-direction.Then, based on wearing comfort, a suitable length ratio (i.e., the ratio of the dimension of the case 111 in the X-direction to its dimension in the Y-direction) is selected. Thus, the dimension (for example, 21.49 mm) of the long axis (which can also be referred to as the length dimension) of the case 111 in the X-direction is determined so that it corresponds to the dimension of the caveum conchae in the X-direction.

[0171] In some embodiments, the dimensions of the housing 111 can be selected within a predetermined range to facilitate wearing the earphone for most users by forming a chamber structure with improved acoustic performance (for example, to allow the sound-generating element 11 to be at least partially inserted into the concha or in contact with the antihelix when the earphone 10 is worn by most users). In this way, for example, a first leakage structure UC and a second leakage structure LC are formed between the earphone 10 and the user's ear to improve the acoustic performance of the earphone. In some embodiments, the width dimension of the housing 111 in the Y-direction can range from 11 mm to 16 mm, depending on the width dimension of the concha in the Y-direction.In some embodiments, the width dimension of the housing 111 in the Y-direction can be between 11 mm and 15 mm. In some embodiments, the width dimension of the housing 111 in the Y-direction can be between 14 mm and 15 mm. In some embodiments, the ratio of the dimension of the housing 111 in the X-direction to its dimension in the Y-direction can be between 1.2 and 5. In some embodiments, the ratio of the dimension of the housing 111 in the X-direction to its dimension in the Y-direction can be between 1.4 and 4. In some embodiments, the ratio of the dimension of the housing 111 in the X-direction to its dimension in the Y-direction can be between 1.5 and 2. In some embodiments, the length dimension of the housing 111 in the X-direction can be in the range of 15 mm to 30 mm.In some embodiments, the length of the housing 111 in the X-direction can be between 16 mm and 28 mm. In some embodiments, the length of the housing 111 in the X-direction can be between 19 mm and 24 mm. In some embodiments, the thickness of the housing 111 in the Z-direction can be between 5 mm and 20 mm, in order to avoid impairing the wearing comfort of the earphone 10 due to an excessively large volume of the housing 111. In some embodiments, the thickness of the housing 111 in the Z-direction can be between 5.1 mm and 18 mm. In some embodiments, the thickness of the housing 111 in the Z-direction can be between 6 mm and 15 mm. In some embodiments, the thickness dimension of the housing 111 in the Z direction can be between 7 mm and 10 mm.In some embodiments, the area of ​​the inside IS of the housing 111 can be between 90 mm. 2 and 560 mm 2 The area of ​​the rectangular inner surface IS is equal to the product of the length and width dimensions of the housing 111. In some embodiments, the area of ​​the inner surface IS can be considered to be approximately equal to the projection area of ​​the membrane 1161 in the Z-direction. For example, the difference between the area of ​​the inner surface IS and the projection area of ​​the membrane 1161 in the Z-direction is 10%. In some embodiments, the area of ​​the inner surface IS can be between 150 mm². 2 and 360 mm 2 In some embodiments, the area of ​​the inner surface IS can be between 160 mm². 2 and 240 mm 2 In some embodiments, the area of ​​the inner surface IS can be between 180 mm². 2 and 200 mm 2 amount to. Based on the in Fig. 10 to Fig. The 13 described principles are carried out as described in Fig. Figure 14 illustrates this. Based on the fact that the earphone 10 offers wearing comfort due to its dimensions, it exhibits better acoustic performance than existing earphones. This means that the earphone 10 can be smaller than existing earphones while maintaining the same acoustic performance.

[0172] With reference to Fig. 22 and Fig. 23 In some embodiments, the distance between the center O of the sound outlet opening 112 and the base of the magnetic circuit assembly 1164 in the Z-direction can depend on the vibration range of the diaphragm 1161 and the thickness of the magnetic circuit assembly 1164. The vibration range of the diaphragm 1161 can influence the amount of air driven by the transducer of the sound-generating part 11. The larger the vibration range of the diaphragm 1161, the greater the amount of air driven by the transducer of the sound-generating part 11 and the higher the sound-generating power of the sound-generating part. The thicker the magnetic circuit assembly 1164, the greater the overall weight of the sound-generating part 11, which impairs the wearing comfort for the user.If the thickness of the sound-generating element is fixed in the Z direction, the volume of the rear chamber can be larger the smaller the distance between the center O of the sound outlet opening 112 and the base of the magnetic circuit arrangement 1164 in the Z direction. The lower the resonance frequency of the rear chamber, the more the resonance peak of the rear chamber shifts to lower frequencies and the smaller the flat region of the frequency response curve becomes.To ensure sufficiently high sound generation power of the sound-generating element, a resonance frequency of the rear chamber within a suitable frequency range (e.g., 1000 Hz to 5000 Hz), and adequate wearing comfort for the user, the distance between the center O of the sound outlet opening 112 and the base surface of the magnetic circuit assembly 1164 (i.e., a side of the receiving element 11643 located away from the sound outlet opening 112 in the Z direction) is in the range of 5.65 mm to 8.35 mm in the Z direction, taking into full consideration of the structural strength, the complexity of the technical implementation, and the overall thickness of the housing 111. In some embodiments, the distance between the center of the sound outlet opening 112 and the base surface of the magnetic circuit assembly 1164 is in the range of 6.00 mm to 8.00 mm in the Z direction.In some embodiments, the distance between the center of the sound outlet opening 112 and the base of the magnetic circuit assembly 1164 in the Z-direction is in the range of 6.35 mm to 7.65 mm. In some embodiments, the distance between the center of the sound outlet opening 112 and the base of the magnetic circuit assembly 1164 in the Z-direction is in the range of 6.70 mm to 7.30 mm. In some embodiments, the distance between the center of the sound outlet opening 112 and the base of the magnetic circuit assembly 1164 in the Z-direction is in the range of 6.95 mm to 7.05 mm.

[0173] In some embodiments, the volume V of the rear chamber must have a suitable range of values ​​to allow the rear chamber to have a large acoustic capacitance Ca while simultaneously having a high resonant frequency. In some embodiments, the distance between the center O1 of the first pressure relief opening 1131 and the base of the magnetic circuit arrangement 1164 can be advantageously designed so that the volume of the rear chamber has a suitable range of values. See Fig. 22 and Fig. 23. If the thickness of the sound-generating part 11 in the Z-direction is fixed, the volume of the rear chamber can be larger the smaller the distance between the center O1 of the first pressure relief opening 1131 and the base of the magnetic circuit arrangement 1164 in the Z-direction. This increases the acoustic capacitance Ca of the rear chamber, but reduces the corresponding resonance frequency of the rear chamber.In order to ensure a sufficiently high sound generation power of the sound generation part 11, a resonance frequency of the rear chamber in the suitable frequency range (for example, 2000 Hz to 6000 Hz) and sufficient wearing comfort for the user, it is therefore provided, taking into full consideration the structural strength, the difficulty of the technical implementation and the overall thickness of the housing 111, that a distance d5 between the center O1 of the first pressure relief opening 1131 and the base surface of the magnetic circuit arrangement 1164 (i.e., a side of the receiving means 11643 that is away from the sound outlet opening 112 in the Z direction) is in the range of 1.31 mm to 1.98 mm. In some embodiments, the distance d5 between the center O1 of the first pressure relief opening 1131 and the base of the magnetic circuit arrangement 1164 in the Z direction is in the range of 1.31 mm to 1.98 mm.In some embodiments, the distance d5 between the center O1 of the first pressure relief opening 1131 and the base of the magnetic circuit assembly 1164 in the Z-direction is in the range of 1.41 mm to 1.88 mm. In some embodiments, the distance d5 between the center O1 of the first pressure relief opening 1131 and the base of the magnetic circuit assembly 1164 in the Z-direction is in the range of 1.51 mm to 1.78 mm. In some embodiments, the distance d5 between the center O1 of the first pressure relief opening 1131 and the base of the magnetic circuit assembly 1164 in the Z-direction is in the range of 1.56 mm to 1.72 mm. In some embodiments, it is similarly provided that a distance d6 between the center O2 of the second pressure relief opening 1132 and the base of the magnetic circuit arrangement 1164 in the Z direction is in the range of 1.31 mm to 1.98 mm.In some embodiments, the distance d6 between the center O2 of the second pressure relief opening 1132 and the base of the magnetic circuit assembly 1164 in the Z-direction is in the range of 1.41 mm to 1.88 mm. In some embodiments, the distance d6 between the center O2 of the second pressure relief opening 1132 and the base of the magnetic circuit assembly 1164 in the Z-direction is in the range of 1.51 mm to 1.78 mm. In some embodiments, the distance d6 between the center O2 of the second pressure relief opening 1132 and the base of the magnetic circuit assembly 1164 in the Z-direction is in the range of 1.56 mm to 1.72 mm.

[0174] In some embodiments, it is provided that, for a fixed thickness of the sound-generating element, the difference in the distance between the center O of the sound outlet opening 112 and the base of the magnetic circuit arrangement 1164 in the Z-direction, and the difference in the distance between the center O1 of the first pressure relief opening 1131 and the base of the magnetic circuit arrangement 1164 in the Z-direction, should be neither too large nor too small. An excessively large difference tends to result in an excessively large volume of the front chamber and thus a lower resonance frequency of the front chamber. An excessively small difference tends to result in an excessively small volume of the front chamber and thus a small vibration range of the diaphragm 1161, which affects the amount of air driven by the transducer of the sound-generating element 11 and thus the sound-generating power of the sound-generating element 11.In order to ensure a sufficiently high sound generation power of the sound generation part 11, a resonance frequency of the rear chamber in a suitable frequency range (for example, 2000 Hz to 6000 Hz) and sufficient wearing comfort for the user, some embodiments provide that the distance between the first pressure relief opening 1131 or the second pressure relief opening 1132 and the sound outlet opening 112 can be limited in the Z direction in order to achieve good sound loss cancellation while maintaining good sound reception quality at the sound outlet opening 112 in the ear canal.In some embodiments, the difference in distance between the center O of the sound outlet opening 112 and the base of the magnetic circuit assembly 1164 in the Z-direction, and the difference in distance between the center O1 of the first pressure relief opening 1131 and the base of the magnetic circuit assembly 1164 in the Z-direction, is in the range of 3.65 mm to 7.05 mm. In some embodiments, the difference in distance between the center O of the sound outlet opening 112 and the base of the magnetic circuit assembly 1164 in the Z-direction, and the difference in distance between the center O1 of the first pressure relief opening 1131 and the base of the magnetic circuit assembly 1164 in the Z-direction, is in the range of 4.00 mm to 6.85 mm.In some embodiments, the difference in distance between the center O of the sound outlet opening 112 and the base of the magnetic circuit assembly 1164 in the Z-direction, and the difference in distance between the center O1 of the first pressure relief opening 1131 and the base of the magnetic circuit assembly 1164 in the Z-direction, is in the range of 4.80 mm to 5.50 mm. In some embodiments, the difference in distance between the center O of the sound outlet opening 112 and the base of the magnetic circuit assembly 1164 in the Z-direction, and the difference in distance between the center O1 of the first pressure relief opening 1131 and the base of the magnetic circuit assembly 1164 in the Z-direction, is in the range of 5.20 mm to 5.55 mm.

[0175] In some embodiments, the distance between the center O1 of the first pressure relief opening 1131 and the base of the magnetic circuit arrangement 1164 in the Z-direction can be the same as the distance between the center O2 of the second pressure relief opening 1132 and the base of the magnetic circuit arrangement 1164 in the Z-direction. To dampen the effect of the cancellation of the sound emitted through the second pressure relief opening 1132 and the sound emitted through the sound outlet opening 112 at the ear canal (i.e., in the listening position), and thus increase the perceived loudness, some embodiments provide that the second pressure relief opening 1132 can be located further away from the sound outlet opening 112 in the Z-direction than the first pressure relief opening 1131.For example, if the difference in distance between the center O of the sound outlet opening 112 and the base of the magnetic circuit arrangement 1164 in the Z direction is in the range of 3.67 mm to 5.57 mm, then the difference in distance between the center O of the sound outlet opening 112 and the base of the magnetic circuit arrangement 1164 in the Z direction is in the range of 5.57 mm to 7.04 mm.

[0176] In some embodiments, a distance is provided between the center O of the sound outlet opening 112 and a median plane of the long axis of the magnetic circuit arrangement 1164, such as one in Fig. The plane NN' shown in Figure 23, which is oriented inwards perpendicular to the drawing plane, lies in the range of 1.45 mm to 2.15 mm. In this description, the median plane of the long axis of the magnetic circuit assembly 1164 refers to a plane that runs parallel to the underside LS of the sound-generating part 11 and passes through the geometric center of the magnetic circuit assembly 1164. That is, the median plane of the long axis of the magnetic circuit assembly 1164 allows this magnetic circuit assembly 1164 to be divided into two equal parts in the X direction. The distance between the center O of the sound outlet opening 112 and the median plane of the long axis of the magnetic circuit assembly 1164 also corresponds to the distance between the center O of the sound outlet opening 112 and the median plane of the long axis in the Y direction of the short axis.In some embodiments, the distance between the center O of the sound outlet opening 112 and the median plane of the long axis is in the range of 1.55 mm to 2.05 mm. In some embodiments, the distance between the center O of the sound outlet opening 112 and the median plane of the long axis is in the range of 1.65 mm to 1.95 mm. In some embodiments, the distance between the center O of the sound outlet opening 112 and the median plane of the long axis is in the range of 1.75 mm to 1.85 mm.

[0177] In some embodiments, the dimension of the sound-generating part 11 in the Y-direction can be defined in order to adapt its dimensions to the dimensions of the cavum conchae. In some embodiments, the dimension of the sound-generating part 11 in the Y-direction can be determined by the distance between the center O1 of the first pressure relief opening 1131 and the median plane of the long axis of the magnetic circuit arrangement 1164, such as the one shown in Fig. The plane NN' shown in Figure 23, which is oriented perpendicularly to the drawing plane and points inwards, can be determined. In some embodiments, the distance between the center O1 of the first pressure relief opening 1131 and the median plane of the long axis of the magnetic circuit arrangement 1164, such as the one shown in Figure 23, can be determined. Fig.The plane NN' shown in Figure 23, which is oriented inwards perpendicular to the drawing plane, is defined to facilitate the design. In some embodiments, the distance between the center O1 of the first pressure relief opening 1131 and the median plane of the long axis of the magnetic circuit assembly 1164 is in the range of 5.45 mm to 8.19 mm. In the present application, the median plane of the long axis of the magnetic circuit assembly 1164 refers to a plane that runs parallel to the underside LS of the sound-generating part 11 and passes through the center of mass of the magnetic circuit assembly 1164. That is, the median plane of the long axis of the magnetic circuit assembly 1164 allows this magnetic circuit assembly 1164 to be divided into two equal parts in the X direction.The distance between the center O1 of the first pressure relief opening 1131 and the median plane of the long axis of the magnetic circuit arrangement 1164 also corresponds to the distance between the center O1 of the first pressure relief opening 1131 and the median plane of the long axis in the Y direction of the short axis. In some embodiments, the distance between the center O1 of the first pressure relief opening 1131 and the median plane of the long axis of the magnetic circuit arrangement 1164 is in the range of 5.95 mm to 8.69 mm. In some embodiments, the distance between the center O1 of the first pressure relief opening 1131 and the median plane of the long axis of the magnetic circuit arrangement 1164 is in the range of 6.45 mm to 7.19 mm.In some embodiments, the distance between the center O1 of the first pressure relief opening 1131 and the median plane of the long axis of the magnetic circuit assembly 1164 is in the range of 6.65 mm to 6.99 mm. Similarly, in some embodiments, the distance between the center O2 of the second pressure relief opening 1132 and the median plane of the long axis of the magnetic circuit assembly 1164 is in the range of 5.46 mm to 8.20 mm. In some embodiments, the distance between the center O2 of the second pressure relief opening 1132 and the median plane of the long axis of the magnetic circuit assembly 1164 is in the range of 5.96 mm to 8.70 mm. In some embodiments, the distance between the center O1 of the second pressure relief opening 1132 and the median plane of the long axis of the magnetic circuit arrangement 1164 is in the range of 6.46 mm to 7.20 mm.In some embodiments, the distance between the center O1 of the second pressure relief opening 1132 and the median plane of the long axis of the magnetic circuit arrangement 1164 is in the range of 6.66 mm to 7.00 mm.

[0178] In some embodiments, the sound outlet opening 112 can be located closer to the second pressure relief opening 1132 than the first pressure relief opening 1131 in the Y-direction, so that the sound outlet opening 112 is closer to the ear canal. By defining the distance between the first pressure relief opening 1131 or the second pressure relief opening 1132 and the sound outlet opening 112 in the Y-direction, good cancellation of sound loss in the far field is achieved while simultaneously ensuring good sound reception quality at the sound outlet opening 112 in the ear canal.In some embodiments, the absolute value of the difference between the center O of the sound outlet opening 112 and the median plane of the long axis of the magnetic circuit arrangement 1164 in the Y-direction, and the distance between the center O1 of the first pressure relief opening 1131 and the median plane of the long axis in the Y-direction, is in the range of 4.0 mm to 6.1 mm. In some embodiments, the absolute value of the difference between the center O of the sound outlet opening 112 and the median plane of the long axis, and the distance between the center O1 of the first pressure relief opening 1131 and the median plane of the long axis, is in the range of 4.5 mm to 5.5 mm.In some embodiments, it is provided that the absolute value of the difference in distance between the center O of the sound outlet opening 112 and the median plane of the long axis from the distance between the center O1 of the first pressure relief opening 1131 and the median plane of the long axis is in the range of 4.8 mm to 5.2 mm.

[0179] In some embodiments, the presence of pressure relief openings 113 (for example, the first pressure relief opening 1131 and the second pressure relief opening 1132) ensures that the air pressure in the rear chamber near the pressure relief openings 113 is approximately equal to the ambient air pressure, while the air pressure in a position farther from the pressure relief openings 113 is higher than the ambient air pressure. Sound passage openings (not shown) are provided on the basket 1163, through which the rear of the diaphragm 1161 communicates with the chamber 115. Therefore, to equalize the air pressure between the rear of the diaphragm 1161 and the chamber 115, the sound passage openings on the basket can be arranged asymmetrically to better balance the airflow.In particular, at a position farther from the first pressure relief opening 1131 and / or the second pressure relief opening 1132, the air pressure is high, which is why the dimensions of the sound passage opening can be large. At a position near the first pressure relief opening 1131 and / or the second pressure relief opening 1132, the air pressure is low, which is why the dimensions of the sound passage opening can be small. In some embodiments, the vibrations at low frequencies of the earphone 10 can be made more stable by adjusting the size (for example, the area) of the first pressure relief opening 1131, the second pressure relief opening 1132, and / or the sound passage opening.In some embodiments, the first pressure relief opening 1131 and the second pressure relief opening 1132 can be offset in the X-direction to achieve a more stable air pressure in the rear chamber and thus a more stable diaphragm oscillation. The projections of the first pressure relief opening 1131 and the second pressure relief opening 1132 onto the median plane of the long axis are either partially or non-coincident. In some embodiments, the area where the projections of the first pressure relief opening 1131 and the second pressure relief opening 1132 coincide with the median plane of the long axis is no larger than 10.77 mm. 2In some embodiments, it is provided that the coincident area of ​​the projections of the first pressure relief opening 1131 and the second pressure relief opening 1132 onto the median plane of the long axis is not larger than 6.77 mm. 2 In some embodiments, it is provided that the coincident area of ​​the projections of the first pressure relief opening 1131 and the second pressure relief opening 1132 onto the median plane of the long axis is not larger than 4.77 mm. 2 In some embodiments, it is provided that the coincident area of ​​the projections of the first pressure relief opening 1131 and the second pressure relief opening 1132 onto the median plane of the long axis is not greater than 2.77 mm. 2 is.

[0180] The basic concept has been described above. It is obvious to the person skilled in the art that the detailed disclosure above is merely an example and does not constitute a limitation of the present application. Although not explicitly stated, a person skilled in the art may make various modifications, improvements, and changes to the application. These modifications, improvements, and changes are indicated in the application so that they are still within the spirit and scope of the exemplary embodiments of the application.

[0181] The specific embodiments recorded in the present application are intended to be exemplary only. One or more technical features in the specific embodiments are intended to be optional or additional, without constituting the necessary technical features of the inventive concept of the present application. In other words, the scope of protection of the present application covers the specific embodiments and is far more extensive than the specific embodiments themselves. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 202211336918.4

[0001] CN 202223239628.6

[0001] CN 2022 / 144339

[0001] CN 2023 / 079411

[0001] CN 2023 / 079404

[0001] CN 2023 / 079410

[0001] Cited non-patent literature

[0000] Basis of standards ANSI: S3.36, S3.25 and IEC: 60318-7

[0038]

Claims

[1] Earphones, including: a sound-generating component, comprising: a transducer comprising a diaphragm used to generate sound under the influence of an excitation signal; and a housing that forms a chamber to accommodate the transducer; and a suspension structure which, in a worn state, is used to support the sound-generating part at a location where the sound-generating part is near the ear canal without blocking the ear canal, wherein a sound outlet opening is provided on an inner side of the housing facing the auricle, which is used to direct sound generated at a front of the diaphragm out of the housing and then transmit it to the ear canal, wherein a first pressure relief opening is provided on another side of the housing, which is used to dissipate sound generated at a rear side of the diaphragm from the housing, and wherein the distance between the center of the sound outlet opening and a center point of an upper boundary of the inside of the housing is greater than the distance between the center of the first pressure relief opening and the center point of the upper boundary of the inside of the housing. [2] Earphone according to claim 1, wherein the ratio of the distance between the center of the sound outlet opening and the center of the upper boundary of the inside of the housing to the distance between the center of the first pressure relief opening and the center of the upper boundary of the inside of the housing is in the range of 1.3 to 2.

1. [3] Earphone according to claim 1 or 2, wherein the suspension structure comprises an ear hook. [4] Earphone according to claim 3, wherein the sound-generating part comprises a connecting end that is connected to the ear hook and a free end that is not connected to the ear hook; wherein, in the worn state, the free end projects into the caveum conchae, such that a certain distance exists between the inside of the sound-generating part and the caveum conchae, and an auxiliary chamber is formed. [5] Earphone according to claim 3 or 4, wherein in the worn state a first part of the ear hook hangs between the auricle and the head of the user, wherein a second part of the ear hook extends towards a side of the auricle facing away from the head and is connected to the sound generating part, and wherein the ratio of the distance between the center of the sound outlet opening and an upper apex of the ear hook to the distance between the center of the first pressure relief opening and the upper apex of the ear hook is in the range of 1.10 to 1.

70. [6] Earphone according to any one of claims 1 to 5, wherein the transducer further comprises a magnetic circuit arrangement, wherein the magnetic circuit arrangement is used to provide a magnetic field, and wherein the absolute value of the difference of the distance between the center of the sound outlet opening and a median plane of a long axis of the magnetic circuit arrangement from the distance between the center of the first pressure relief opening and the median plane of the long axis is in the range of 4.0 mm to 6.1 mm. [7] Earphone according to any one of claims 1 to 6, wherein a second pressure relief opening is further provided on another side of the housing, and wherein the area of ​​the first pressure relief opening is larger than the area of ​​the second pressure relief opening. [8] Earphone according to any one of claims 1 to 6, wherein the first pressure relief opening is arranged on the outside, top or bottom of the housing, a second pressure relief opening is arranged on the housing, The first pressure relief opening and the second pressure relief opening are located on two different sides of the housing. [9] Earphone according to claim 7 or 8, wherein the first pressure relief opening is provided on the top of the housing and the second pressure relief opening is provided on the bottom of the housing. [10] Earphone according to any one of claims 7 to 9, wherein the distance between the center of the sound outlet opening and a perpendicular plane of a connecting line between the center of the first pressure relief opening and the center of the second pressure relief opening is 0 mm to 2 mm. [11] Earphone according to any one of claims 7 to 10, wherein an angle between a connecting line of the center of the sound outlet opening with the center of the first pressure relief opening and a connecting line of the center of the sound outlet opening with the center of the second pressure relief opening is in the range of 46.40° to 114.04°. [12] Earphone according to any one of claims 7 to 11, wherein the ratio of the distance between the center of the sound outlet opening and the center of the first pressure relief opening to the distance between the center of the sound outlet opening and the center of the second pressure relief opening is in the range of 0.9 to 1.

1. [13] Earphone according to any one of claims 7 to 12, wherein the ratio of the area of ​​the sound outlet opening to the total area of ​​the first pressure relief opening and the second pressure relief opening is in the range of 1 to 10. [14] Earphone according to any one of claims 1 to 12, wherein at least one of the sound outlet opening and the first pressure relief opening is provided with a sound-absorbing mesh, the thickness of which is in the range of 40 µm to 150 µm.

Images