Sound generation part

Abstract

Sound generation component, comprising: a membrane; a magnetic circuit arrangement; and a coil connected to the diaphragm and located at least partially within a magnetic gap formed by the magnetic circuit arrangement, wherein the coil, when energized, causes the diaphragm to vibrate in order to produce sound, wherein the diaphragm comprises a main area and a surround area surrounding the main area, wherein the main area comprises a first inclined segment and a first connecting segment connected to the coil, wherein the first inclined segment abuts a portion of the surround area and the first inclined segment is inclined away from the coil relative to the first connecting segment, the inclination angle of the first inclined segment relative to the first connecting segment being in the range of 5° to 30°, wherein the first connecting segment is perpendicular to the direction of vibration of the diaphragm.

Description

CROSS-REFERENCE

[0001] The present application claims priority from the Chinese application filed on 28 October 2022 with application number 202211336918.4, the priority from the Chinese application filed on 1 December 2022 with application number 202223239628.6 and the priority from the international application filed on 30 December 2022 with application number PCT / CN 2022 / 144339, all the contents of which are incorporated herein by reference. TECHNICAL AREA

[0002] The present description concerns the field of acoustics, in particular a sound generation component. STATE OF THE ART

[0003] With the development of acoustic output technology, sound-generating components (such as headphones) are finding widespread use in everyday life. They can interact with electronic devices like mobile phones and computers to provide users with a fantastic audio experience. The output quality of a sound-generating component has a significant impact on user comfort. The structure of the diaphragm and any supporting structure within the sound-generating component typically influence its output quality. Therefore, it is essential to provide a sound-generating component with high output quality. REVELATION OF THE INVENTION

[0004] One embodiment in the present description provides a sound-generating part comprising: a diaphragm; a magnetic circuit assembly; and a coil connected to the vibrating diaphragm and located at least partially within a magnetic gap formed by the magnetic circuit assembly, wherein, upon energization, the coil causes the vibrating diaphragm to vibrate in order to generate sound, wherein the vibrating diaphragm comprises a main region and a surround region surrounding the main region; the main region comprises a first inclined segment and a first connecting segment connected to the coil, wherein the first inclined segment bears against a partial region of the surround region and the first inclined segment is inclined away from the coil relative to the first connecting segment.

[0005] In some embodiments, the corrugated area includes a second inclined segment that at least partially abuts the first inclined segment.

[0006] In some embodiments, the second inclined segment is located on a side of the first inclined segment facing away from the coil.

[0007] In some embodiments, the corrugated area is provided to include an arc-shaped segment, wherein the ratio of the height to the span of the arc-shaped segment is in the range of 0.35 to 0.4.

[0008] In some embodiments, the inclination angle of the first inclined segment relative to the first connecting segment is in the range of 5° to 30°, with the first connecting segment running perpendicular to the direction of vibration of the membrane.

[0009] In some embodiments, the main area includes a dome located at an end of the first connecting segment far from the first inclined segment, with the span of the dome ranging from 2 mm to 8 mm and the height of the dome ranging from 0.7 mm to 1.2 mm.

[0010] In some embodiments, the ratio of the height to the span of the dome is in the range of 0.1 to 0.3.

[0011] In some embodiments, it is provided that the frequency at which high-frequency partial vibrations occur is not less than 20 kHz.

[0012] In some embodiments, the magnetic circuit arrangement includes a receiving element, wherein, with an input voltage of 0.1 V to 0.7 V in the frequency range of 20 Hz to 6.1 kHz, the distance from the bottom of the coil to the bottom of the receiving element is in the range of 0.8 mm to 0.9 mm.

[0013] In some embodiments, the sound-generating part further comprises a carrier that surrounds the magnetic circuit arrangement, wherein the first part of the carrier is connected to a second connecting segment of the bead area.

[0014] In some embodiments, the second connecting segment of the corrugated area is connected to the first part of the support via a fastening ring.

[0015] In some embodiments, the first part of the support, which is connected to the corrugated area, has a thickness in the range of 0.3 mm to 3 mm, and the thickness of the first part is defined as the minimum distance between the connection area of ​​the support with the corrugated area and an area of ​​the support directly adjacent to the magnetic circuit assembly in the direction of vibration of the membrane.

[0016] In some embodiments, the sound-generating part further comprises a housing which is provided with a pressure relief opening, wherein a rear chamber is formed between the pressure relief opening and a rear side of the diaphragm, the resonance frequency of which is not less than 3.3 kHz.

[0017] In some embodiments, the volume of the rear chamber is provided for to be in the range of 60 mm². 3 up to 110 mm 3 lies.

[0018] In some embodiments, the sound-generating part further comprises a housing provided with a pressure relief opening, wherein the support is equipped with several ventilation openings through which the sound is transmitted from the back of the diaphragm to the pressure relief opening, wherein the several ventilation openings comprise at least a first ventilation opening and a second ventilation opening, wherein the distance between the center of the first ventilation opening and the center of the pressure relief opening is greater than the distance between the center of the second ventilation opening and the center of the pressure relief opening, and wherein the area of ​​the first ventilation opening is larger than the area of ​​the second ventilation opening.

[0019] In some embodiments, the sound-generating part further comprises a housing which is provided with a pressure relief opening, wherein the support is equipped with several ventilation openings through which the sound is transmitted from the back of the membrane to the pressure relief opening, and wherein, in the direction of vibration of the membrane, the ratio of the total area of ​​the several ventilation openings to the projection area of ​​the membrane is in the range of 0.008 to 0.3.

[0020] In some embodiments, it is provided that the projection area of ​​the membrane is in the range of 90 mm in the direction of vibration of the membrane. 2 up to 560 mm 2 lies and the total area of ​​the multiple ventilation openings is in the range of 4.54 mm 2 up to 12.96 mm 2 lies.

[0021] In some embodiments, the sound-generating part further comprises a housing, wherein, in the direction of vibration of the diaphragm, the ratio of the projection area of ​​the diaphragm to the projection area of ​​the housing is not less than 0.5.

[0022] In some embodiments, it is provided that in the direction of vibration of the diaphragm the ratio of the projection area of ​​the diaphragm to the projection area of ​​the housing is in the range of 0.8 to 0.95.

[0023] In some embodiments, the dimension of the long axis of the membrane is in the range of 13 mm to 25 mm and the dimension of the short axis of the membrane is in the range of 4 mm to 13 mm.

[0024] In some embodiments, it is provided that several ventilation openings are provided in the bottom wall of the receiving element of the magnetic circuit arrangement or in its side wall, which abuts the support.

[0025] In some embodiments, the dome is formed by interlacing intersecting carbon fibers, wherein the carbon fibers intersect at least partially at a first angle, the first angle being in the range of 45° to 90°.

[0026] In some embodiments, it is provided that the thickness of the dome is less than 80 µm in the direction of vibration of the membrane.

[0027] In some embodiments, it is provided that the minimum distance between the coil and the first inclined segment is not less than 0.3 mm.

[0028] In some embodiments, the magnetic circuit arrangement comprises a magnetically conductive plate and a magnet, wherein the magnetically conductive plate is located between the magnet and the diaphragm and adheres to the surface of the magnet, and wherein the distance between the center of the coil and the center of the magnetically conductive plate in the direction of vibration of the diaphragm is less than 0.3 mm.

[0029] In some embodiments, it is provided that, in the direction of vibration of the membrane, the distance from the lowest point of the dome to the upper surface of the magnetically conductive plate is greater than 0.8 mm.

[0030] In some embodiments, the magnetic circuit arrangement includes a receiving element, wherein, in the direction of vibration of the diaphragm, the distance between a base of the coil and a base wall of the receiving element is in the range of 0.2 mm to 4 mm.

[0031] In some embodiments, the distance between the coil and a side wall of the receiving element is in the range of 0.1 mm to 0.5 mm. BRIEF DESCRIPTION OF THE FIGURES

[0032] The present description 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. These show: Fig. 1 a schematic representation of an exemplary ear according to some embodiments of the present application; Fig. 2 a schematic representation of an open-ear headphone in an exemplary worn state according to some embodiments of the present description; Fig. 3 a schematic representation of the open-ear headphones in an exemplary worn state according to some embodiments of the present description; Fig. 4. A representation of another open-ear headphone in an exemplary worn state according to some embodiments of the present description; Fig. 5 a schematic representation of an exemplary distribution of a chamber structure arranged around one of two sound sources according to some embodiments of the present description; Fig. 6 an exemplary schematic representation of an internal structure of a sound-generating part according to some embodiments of the present description; Fig. 7 an exemplary representation of the appearance of a converter according to some embodiments of the present description; Fig. 8 an exemplary exploded view of the converter according to some embodiments of the present description; Fig. 9 an exemplary representation of an internal structure of the sound-generating part according to some embodiments of the present description; Fig. 10 an exemplary structural representation of a membrane according to some embodiments of the present description; Fig. 11A an exemplary schematic representation of a high-frequency bandwidth of the sound-generating part according to some embodiments of the present description; Fig. 11B a schematic representation of an exemplary braided structure made of carbon fibers according to some embodiments of the present description; Fig. 12 a schematic representation of the vibration amplitude of the sound generating part at different drive voltages according to some embodiments of the present description; Fig. 13 an exemplary structural representation of a rear chamber according to some embodiments of the present description; Fig. 14 a diagram of frequency response curves of the rear chamber as a function of different thicknesses of a first part according to some embodiments of the present description; Fig. 15 a diagram of frequency response curves of the sound generation part at different drive voltages according to some embodiments of the present description; Fig. 16 a schematic representation of exemplary positions of a support, a first pressure relief opening and a second pressure relief opening according to some embodiments of the present description; and Fig. 17 a diagram of frequency response curves of the rear chamber as a function of different total areas of the ventilation openings according to some embodiments of the present description. DETAILED EXECUTION FORMS

[0033] To further explain the technical solutions of the embodiments described in this document, the drawings required for describing these embodiments are briefly summarized below. Naturally, the following drawings represent only some examples or embodiments of the present description, and a person skilled in the art can apply the present description to other similar scenarios based on these drawings without inventive step. Unless otherwise stated or understood from the context, the same reference numerals in the figures represent the same structures or operations.

[0034] 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.

[0035] As shown in the present description and in the claims, the terms "a" and / or "the" need 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.

[0036] 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.

[0037] 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.

[0038] In this description, flowcharts are used to illustrate the processes performed by the system according to the embodiments described. It should be understood that preceding or subsequent processes do not necessarily have to be performed exactly in the order shown. Rather, the individual steps can be processed in reverse order or concurrently. Furthermore, additional processes can be added to these processes, or one or more steps can be removed from them.

[0039] 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 can comprise an external auditory canal 101, a concha 102, a concha 103, a triangular fossa 104, an antihelix 105, a scapha 106, a helix 107, an earlobe 108, and a crus helicis 109. In some embodiments, the wearing and stabilization of an acoustic device can be achieved using one or more sections of the ear 100. In some embodiments, the external auditory canal 101, the concha 102, the concha 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 headphone) 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 thereof. 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 wearing the acoustic device. 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 "relieved," thus reducing the impact of the acoustic device on the user's ear health.When the user wears the acoustic device while out and about, the acoustic device cannot block the external auditory canal 101, allowing the user to receive both sound from the acoustic device and sound from the environment (for example, a whistle, bicycle bell, surrounding conversations, audible traffic instructions, etc.), thus reducing the likelihood of a traffic accident. For example, when the acoustic device is worn by the user, the entire structure or part of the structure of the acoustic device may be located in front of the crus helicis 109 (e.g., in the area defined by the dashed line in ). Fig. 1 enclosed area J). As another example, in the case of a user-worn acoustic device, the entire structure or part of the structure of the acoustic device may be in contact with the upper region of the external auditory canal 101 (e.g., the region in which one or more of the sections crus helicis 109, cymba conchae 103, fossa triangularis 104, antihelix 105, scapha 106, helix 107, etc. are located). As yet another example, in the case of a user-worn acoustic device, the entire structure or part of the structure of the acoustic device may be located in one or more sections of the ear (e.g., cavum conchae 102, cymba conchae 103, fossa triangularis 104, etc.) (e.g., in the areas indicated by dashed lines in Fig. 1 enclosed areas M1 and M2).

[0040] 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 to wear the acoustic devices 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 KEMAR, HEAD Acoustics, or B&K 4128 / 5128 series, can be manufactured as a reference for wearing an acoustic device to represent the situations of most users when wearing the device normally.Using GRAS KEMAR as an example, the ear simulator can be one of the following types: GRAS 45AC, GRAS 45BC, GRAS 45CC, or GRAS 43AG, etc. Using HEAD Acoustics as an example, the ear simulator can be one of the following types: HMS II.3, HMS II.3 LN, or HMS II.3LN HEC, etc. It should be noted that the data ranges determined in the exemplary embodiments of this description are based on GRAS 45BC KEMAR. However, it should be understood that variations may exist between different head and ear models, which can lead to fluctuations of ±10% in the relevant data ranges when using other models.As an example only, the ear serving as a reference may exhibit the following relevant characteristics: The dimension of the auricle's projection onto 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's projection onto the sagittal plane in one direction of the sagittal axis may range from 36.6 mm to 55 mm. The projection of the auricle onto the sagittal plane refers to the projection of the auricle's rim onto the sagittal plane. The rim of the auricle consists at least of the outer contour of the helix, the contour of the earlobe, the tragus contour, the intertragic notch, the antitragus tip, and the antitragohelic notch.Therefore, expressions such as "user-worn," "being in the worn state," and "in the worn state" in this application can 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 100 can, of course, be differentiated according to ear shapes and sizes. This differentiated design can be expressed 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.

[0041] It should be noted that in fields such as medicine and anatomy, three fundamental sectional planes—including a sagittal plane, a coronal plane, and a horizontal plane—as well as three fundamental axes—including a sagittal axis, a coronal axis, and a vertical axis—of the human body can be defined. The sagittal plane is a sectional plane that runs perpendicular to the ground in the front-to-back direction of the body, dividing the human body into a left and a right half. The coronal plane is a sectional plane that runs perpendicular to the ground in the left-to-right direction of the body, dividing the human body into an anterior and a posterior half.The horizontal plane refers to a cross-sectional plane running parallel 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 is an axis running in the front-back direction of the body and perpendicular to the coronal plane; the coronal axis is an axis running in the left-right direction of the body and perpendicular to the sagittal plane; and the vertical axis is an axis running in the top-bottom direction of the body and perpendicular to the horizontal plane. Furthermore, it is intended that the term "front of the ear" used in the present application refers to the side of the ear lying along the sagittal axis and pointing towards the facial area of ​​the human body. When viewing the ear of the aforementioned simulator in the direction of the coronal axis of the human body, this results in the following: Fig. 1. Schematic representation of the front contour shown.

[0042] The above description of ear 100 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 in this matter, as described in this application. For example, part of the structure of the acoustic device can partially or completely obscure the external auditory canal 101. These changes and modifications fall within the scope of protection of this application.

[0043] This shows Fig. 2 a schematic representation of an open-ear headphone in an exemplary worn state according to some embodiments of the present description, Fig. 3 a schematic representation of the open-ear headphones in an exemplary worn state according to some embodiments of the present description, and Fig. 4. A representation of another open-ear headphone in an exemplary worn state according to some embodiments of the present description. In some embodiments, the open-ear headphone 10 may include, but are not limited to, an air conduction headphone and a bone conduction headphone, etc. The open-ear headphone 10 may, in some embodiments, be combined with products such as eyeglasses, a headset, a head-mounted display, an AR / VR headset, or the like. As shown in Fig. 2, Fig. 3 to Fig. As shown in Figure 4, the open-ear headphones 10 can comprise a sound-generating element 11 and an ear hook 12. In some embodiments, the sound-generating element 11 of the open-ear headphones 10 can be worn on the user's body (e.g., on the head, neck, or upper torso) by means of the ear hook 12.

[0044] In some embodiments, when the open-ear headphones 10 are worn, a first part of the ear hook 12 can be suspended between the user's ear and head, while a second part extends towards the side of the ear facing away from the head and is connected to the sound-generating part 11 to secure the sound-generating part 11 at a location near the ear canal without obstructing it. In some embodiments, the ear hook 12 can be an arc-shaped structure adapted to the user's ear to allow it to be suspended from the upper part of the ear. In other embodiments, the ear hook 12 can be designed as a clamping structure adapted to the user's ear, allowing it to be clamped onto the ear.In some embodiments, the ear hook 12 may, but is not limited to, include a hook structure, an elastic band or the like, so that the open-ear headphones 10 can be better attached to the user's body to prevent them from falling out during use.

[0045] In some embodiments, the sound-generating part 11 can be designed to be worn on the user's body, and a transducer (e.g., transducer 112) can be provided in the sound-generating part 11 to generate sound that is input into the user's ear 100. In some embodiments, the open-ear headphone 10 can be combined with products such as eyeglasses, a headset, a head-mounted display, an AR / VR headset, or the like. In this case, the sound-generating part 11 can be attached near the user's ear 100 by hanging or clamping. In some embodiments, the sound-generating part 11 can be annular, elliptical, polygonal (regular or irregular), U-shaped, V-shaped, or semicircular, so that the sound-generating part 11 can be suspended directly from the user's ear 100.

[0046] Combined with Fig. 1 and Fig. 2 In some embodiments, when the user wears the open-ear headphones 10, at least part of the sound-generating part 11 in area J at the front of the tragus of the ear 100 (see Fig. 1) or be positioned in areas M1 and M2 within the auricle. The following are examples of different wearing positions of the sound-generating part 11 (shown as 11A, 11B and 11C in the figure). Fig. 2) addressed. It should be noted that in the embodiments described in this text, the “anterior outer surface of the auricle” refers to the side of the auricle facing away from the head along the coronal axis. Similarly, the “posterior inner surface of the auricle” refers to the side of the auricle facing the head along the coronal axis. In some embodiments, the positioning of the sound-generating element 11 at 11A means that the sound-generating element 11 is located on the side of the user’s ear 100 facing the face along the sagittal axis. That is, the sound-generating element 11 is located in region J on the front of the ear 100.

[0047] Furthermore, it is provided that a transducer (e.g., transducer 112) is provided in the housing of the sound-generating part 11. At least one sound outlet opening (e.g., sound outlet opening 111a) can be provided in the housing of the sound-generating part 11 (e.g., housing 111). Fig. (2 not shown). The sound outlet opening may be located on the side wall of the sound-generating element housing facing the user's external ear canal 101 or located near it. The transducer can emit sound towards the user's external ear canal 101 via the sound outlet opening. The transducer is an element that can receive an electrical signal and convert it into an emitted sound signal. In some embodiments, the transducer 112 may comprise types such as low-frequency loudspeakers (e.g., 30 Hz to 150 Hz), mid-low-frequency loudspeakers (e.g., 150 Hz to 500 Hz), mid-high-frequency loudspeakers (e.g., 500 Hz to 5 kHz), high-frequency loudspeakers (e.g., 5 kHz to 16 kHz), or broadband loudspeakers (e.g., 30 Hz to 16 kHz), or any combination thereof, according to frequency range. The terms low frequency, high frequency, etc., are used interchangeably.These terms simply denote broad frequency ranges and can be categorized differently depending on the application. For example, a frequency cutoff point can be defined, where low frequency refers to the frequency range below the cutoff point and high frequency to the frequency range above the cutoff point. This cutoff point can be any value within the range audible to the human ear, e.g., 500 Hz, 600 Hz, 700 Hz, 800 Hz, 1000 Hz, etc.

[0048] In some embodiments, the transducer can include a diaphragm (e.g., diaphragm 1121). When the diaphragm vibrates, sound can be emitted from either the front or rear surface of the diaphragm. The cavity in the housing of the sound-generating element 11 is divided by the diaphragm into at least a front chamber (e.g., front chamber 114) in front of the diaphragm and a rear chamber (e.g., rear chamber 116) behind the diaphragm. The sound outlet is acoustically coupled to the front chamber, and the vibration of the diaphragm causes air vibration in the front chamber, thereby generating airborne sound. The airborne sound generated in the front chamber is radiated outwards through the sound outlet. In some embodiments, the housing of the sound-generating element 11 can further include one or more pressure relief openings (e.g., a first pressure relief opening 111c and a second pressure relief opening 111d).The pressure relief vent can be located on a side wall of the housing adjacent to or opposite the side wall supporting the sound outlet. The pressure relief vent is acoustically coupled to the rear chamber, and the vibration of the diaphragm also causes air vibration in the rear chamber, thereby generating airborne sound. The airborne sound generated in the rear chamber can be radiated outwards via the pressure relief vent. For example, in some embodiments, the transducer in the sound-generating part 11 can emit sound with a phase difference (e.g., opposite phase) via the sound outlet and the pressure relief vent.The sound outlet opening can be located on the side wall of the housing of the sound-generating part 11 facing the user's external auditory canal 101, while the pressure relief opening can be located on the side of the housing of the sound-generating part 11 facing away from the user's external auditory canal 101. In this case, the housing can act as a baffle to increase the distance between the sound outlet opening or the pressure relief opening and the external auditory canal 101, thereby increasing the sound intensity at the external auditory canal 101 and simultaneously reducing the volume of sound loss in the far field.

[0049] In some embodiments, the sound-generating part 11 can have a long-axis direction Y and a short-axis direction Z, which are perpendicular to the thickness direction X and orthogonal to each other. Here, the long-axis direction Y can be defined as the direction with the greatest extent in the two-dimensional projection surface of the sound-generating part 11 (e.g., the projection of the sound-generating part 11 onto the plane of its outer surface or onto the sagittal plane) (e.g., if the projection shape is rectangular or approximately rectangular, the long-axis direction corresponds to the length direction of the rectangle or the approximately rectangular rectangle). The short-axis direction Z can be defined as the direction that is perpendicular to the long-axis direction Y in the projection shape of the sound-generating part 11 on the sagittal plane (e.g.,If the projection shape is rectangular or approximately rectangular, the direction of the short axis corresponds to the width direction of the rectangle or approximately the rectangle. The thickness direction X can be defined as the direction perpendicular to the two-dimensional projection surface. For example, it corresponds to the direction of the coronal axis and points in the left-right direction of the body. In some embodiments, if the sound-generating part 11 is inclined in the worn state, the direction Y of the long axis and the direction Z of the short axis may nevertheless be parallel or approximately parallel to the sagittal plane. The direction Y of the long axis may have a certain angle to the direction of the sagittal axis, i.e., the direction Y of the long axis is inclined accordingly. The direction Z of the short axis may have a certain angle to the direction of the vertical axis, i.e.,, the direction Z of the short axis is also inclined, as for the sound-generating part 11 at position 11B in . Fig. 2 and for the wearing situation of the sound-generating part 11 in Fig. Figure 4 illustrates this. In some embodiments, the entire structure or part of the structure of the sound-generating element 11 can project into the cavum conchae. This means that the projection of the sound-generating element 11 onto the sagittal plane and the projection of the cavum conchae onto the sagittal plane have an overlapping portion. For specific details regarding the attachment of the sound-generating element 11 to 11B, reference can be made to other sections of this description, for example, to Fig. 3 and related contents of the description. In some embodiments, the sound-generating part 11 may also be in a horizontal or nearly horizontal position when worn, as for the sound-generating part 11 at position 11C in Fig. 2 and for the sound generation part 11 in Fig. Figure 3 illustrates this. In this case, the direction Y of the long axis can coincide with or approximately coincide with the direction of the sagittal axis, and both point in the front-back direction of the body, while the direction Z of the short axis can coincide with or approximately coincide with the direction of the vertical axis, and both point in the top-down direction of the body. It should be noted that the approximately horizontal position of the sound-generating part 11 in the worn state may mean that the angle between the direction of the long axis of the sound-generating part 11 (as shown in Figure 3) is approximately 1. Fig. 2 shown) and the sagittal axis lies within a certain range (e.g., not greater than 20°). Furthermore, the carrying positions of the sound-generating part 11 are not limited to those shown in Fig. The two positions shown, 11A, 11B and 11C, are limited. It is sufficient if they are in the positions shown. Fig. The areas J, M1, or M2 shown in section 1 may be located there. For example, the entire structure or part of the structure of the sound-generating part 11 may be located in area J, which is indicated by the dashed line in section 1. Fig. 1 is enclosed. As another example, the entire structure or part of the structure of the sound-producing part 11 can be in contact with one or more of the sections crus helicis 109, cymba conchae 103, fossa triangularis 104, antihelix 105, scapha 106, helix 107, etc., of the external auditory canal 101. As yet another example, the entire structure or part of the structure of the sound-producing part 11 can be enclosed in a chamber (e.g., the region M1, which includes at least the cymba conchae 103 and the fossa triangularis 104, and the region M2, which includes at least the cavum conchae 102). Both are in Fig. 1 enclosed by dashed lines) lie, which is formed by one or more sections of the ear 100 (e.g. the cavum conchae 102, the cymba conchae 103, the fossa triangularis 104 etc.).

[0050] To improve the stability of the open-ear headphones 10 when worn, one of the following possibilities or a combination thereof can be used in some embodiments of the open-ear headphones 10. For example, the ear hook 12 is at least partially designed as a profiled structure that conforms to at least one of the backs of the ear and the head in order to increase the contact area of ​​the ear hook 12 with the ear and / or the head and thereby increase the resistance to the open-ear headphones 10 falling out of the ear. Alternatively, the ear hook 12 is at least partially designed 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 and thereby increase the resistance to the open-ear headphones 10 falling out of the ear.For example, the ear hook 12 is at least partially designed so that, when worn, it presses against the head, thereby creating a counterforce that pushes against the ear. This presses the sound-generating element 11 against the front of the ear to increase the resistance against the open-ear headphones 10 falling out of the ear. For example, the sound-generating element 11 and the ear hook 12 are designed so that, when worn, they each clamp areas on the front and back of the ear containing physiological parts such as the antihelix and the cavum conchae, respectively, to increase the resistance against the open-ear headphones 10 falling out of the ear.As another example, the sound-generating part 11 or an associated auxiliary structure is arranged in such a way that it / it protrudes at least partially into physiological areas such as the cavum conchae, the cymba conchae, the fossa triangularis or the scapha in order to increase the resistance against the open-ear headphones 10 falling out of the ear.

[0051] The sound-generating part 11 can have a connecting end CE attached to the ear hook 12 and a free end FE not attached to the ear hook 12. For example, when worn, the free end FE of the sound-generating part 11 can protrude into the cavum conchae, as shown in Fig. Figure 4 illustrates this. Optionally, the sound-generating element 11 and the ear hook 12 can be designed to jointly clamp the aforementioned ear area from both the front and back of the ear area corresponding to the conchae, in order to increase the resistance against the open-ear headphones 10 falling out of the ear and thus improve the stability of the open-ear headphones 10 when worn. For example, the free end FE of the sound-generating element can press against the conchae in the thickness direction X. As another example, the free end FE can rest against the conchae in the Y direction of the long axis and / or the Z direction of the short axis (e.g., against the inner wall of the conchae opposite the free end FE). Here, the free end FE of the sound-generating element 11 refers to an end region of the sound-generating element 11 that is opposite the attachment end connected to the ear hook 12.The sound-generating part 11 can have a regular or irregular structure. To further explain the free end FE of the sound-generating part 11, an example is given below. For instance, if the sound-generating part 11 has a cuboid structure, the end wall of the sound-generating part 11 is a flat surface. In this case, the free end FE of the sound-generating part 11 is an end-region side wall of the sound-generating part 11 opposite the attachment end connected to the ear hook 12. As another example, if the sound-generating part 11 has a spherical, ellipsoidal, or irregular structure, the free end FE of the sound-generating part 11 can be a specific region obtained by a section of the sound-generating part 11 along the YZ plane (the plane spanned by the Z direction of the short axis and the X direction of the thickness) located far from the attachment end.It should be noted that, in addition to the free end FE of the sound-generating part 11 protruding into the concha, it is also possible for the free end to project orthogonally onto the antihelix, or for this orthogonal projection to fall on the left or right side of the head and lie on the sagittal axis of the human body in front of the ear. In other words, the ear hook 12 can support the sound-generating part 11 in such a way that it can be worn at a specific location, such as the concha, the antihelix, or the front of the ear.

[0052] The following section describes the Open-Ear Headphones 10 using the example of the one in Fig. The open-ear headphones shown in Figure 4 are described in detail below. It should be noted that the structure and corresponding parameters of the open-ear headphones are described below. Fig. 4 - provided no acoustic principles are violated - are also applicable to open-ear headphones of other previously mentioned configurations.

[0053] By having at least part of the sound-generating element 11 project into the cavum conchae, the loudness at the listening position (e.g., at the ear canal opening) can be increased, particularly in the mid-low frequency range, while simultaneously maintaining the cancellation effect for sound loss in the far field. For illustrative purposes only, the sound-generating element 11 and the cavum conchae form a chamber-like structure (hereinafter referred to as the "chamber-like structure") when all or part of the structure of the sound-generating element 11 projects into the cavum conchae. In the embodiments described in this document, the chamber-like structure can be understood as a semi-enclosed structure formed jointly by the side wall of the sound-generating element 11 and the structure of the cavum conchae.This semi-enclosed structure is not completely sealed from the environment, but rather has a leakage structure (e.g., an opening, a gap, a tube) that acoustically communicates with the environment. When the user wears the open-ear headphones 10, one or more sound outlet openings may be provided on the side of the housing of the sound-generating part 11 facing the user's ear canal or closest to it. One or more pressure relief openings may be provided on other side walls of the housing of the sound-generating part 11 (e.g., the side wall facing away from or farther from the user's ear canal). The sound outlet opening is acoustically coupled to the front chamber of the open-ear headphones 10, and the pressure relief opening is acoustically coupled to the rear chamber of the open-ear headphones 10.Using the example of a sound-generating part 11 with a sound outlet opening and a pressure relief opening, the following applies: The sound emitted from the sound outlet opening and the sound emitted from the pressure relief opening can be approximated as two sound sources whose sound waves have opposite phases. The sound-generating part 11 and the corresponding inner wall of the cavum conchae form a chamber-like structure, wherein the sound source corresponding to the sound outlet opening is located inside the chamber-like structure and the sound source corresponding to the pressure relief opening is positioned outside the chamber-like structure, thus the in . Fig. The acoustic model shown in section 5 is formed.

[0054] Fig. Figure 5 shows a schematic representation of an exemplary distribution of a chamber structure arranged around one of two sound sources, according to some embodiments described in this document. As in Fig. As shown in Figure 5, the chamber-like structure 502 can contain a listening position and at least one sound source 501A. Here, "contains" can mean that at least one of either the listening position or the sound source 501A is located inside the chamber-like structure 502, or that either the listening position or the sound source 501A is located at the inner edge of the chamber-like structure 502. The listening position can correspond to the entrance of the ear canal, but also to an acoustic reference point of the ear, such as the ear reference point (ERP), the ear-drum reference point (DRP), etc., or to an entrance structure facing the listener. Since the sound source 501A is enclosed by the chamber-like structure 502, most of the sound emitted by it will reach the listening position by direct radiation or reflection.Accordingly, the omission of the chamber-like structure 502 would result in most of the sound emitted by sound source 501A not reaching the listening position. Therefore, the inclusion of the chamber structure significantly increases the loudness of the sound that does reach the listening position. Simultaneously, only a small portion of the out-of-phase sound emitted by the out-of-phase sound source 501B outside the chamber-like structure 502 can pass through the leakage structure 503 of the chamber-like structure 502 into its interior. This corresponds to the generation of a secondary sound source 501B' at the leakage structure 503, the intensity of which is significantly lower than that of sound source 501B and also significantly lower than that of sound source 501A.The sound generated by the secondary sound source 501B' causes a weak out-of-phase cancellation in the chamber with respect to the sound source 501A, thereby significantly increasing the perceived loudness at the listening position. Regarding sound loss, it is assumed that the sound radiated from the sound source 501A to the outside environment via the leakage structure 503 of the chamber corresponds to a secondary sound source 501A' generated at the leakage structure 503. Since almost all the sound radiated by the sound source 501A is emitted through the leakage structure 503, and the structural dimensions of the chamber-like structure 502 are much smaller than the room dimensions used for evaluating sound loss (by at least an order of magnitude), the strength of the secondary sound source 501A' is considered to be equivalent to that of the sound source 501A.For the outdoor area, the secondary sound source 501A' and the sound source 501B provide double sound source cancellation to reduce sound loss.

[0055] In specific application scenarios, the outer wall of the housing of the sound-generating element 11 is typically flat or curved, while the contour of the user's concha 102 has an uneven structure. Due to the partial or complete protrusion of the structure of the sound-generating element 11 into the concha, a chamber-like structure connected to the surrounding environment is formed between the sound-generating element 11 and the contour of the concha. Furthermore, by providing the sound outlet opening at the position of the housing of the sound-generating element 11 facing the user's ear canal opening and close to the edge of the concha 102, and by providing the pressure relief opening at the position of the sound-generating element 11 facing away from or far from the ear canal opening, the sound can be reduced. Fig. The acoustic model shown in section 5 can be implemented. This increases the listening position at the user's ear opening when the user wears open-ear headphones (section 10) and reduces sound loss in the far field.

[0056] Fig. Figure 6 shows an exemplary schematic representation of an internal structure of the sound-generating part according to some embodiments described in this document. As in Fig. As shown in Figure 6, the sound-generating part 11 can, in some embodiments, comprise a transducer 112 and a housing 111 that accommodates the transducer 112. The transducer 112 can comprise a diaphragm 1121. Between the diaphragm 1121 and the housing 111, a front chamber 114 in front of the diaphragm 1121 and a rear chamber 116 behind the diaphragm 1121 can be formed. The housing 111 has a sound outlet opening 111a, which is acoustically coupled to the front chamber 114, and a pressure relief opening (for example, a first pressure relief opening 111c and a second pressure relief opening 111d, wherein the second pressure relief opening 111d is not located in the housing 111). Fig. (as shown in Figure 6), which is acoustically coupled to the rear chamber 116, is provided. A connecting bracket 115 can be provided in the housing 111. An acoustic channel 1151 is provided on the connecting bracket 115, which connects the first pressure relief opening 111c to the rear chamber 116 in order to connect the rear chamber 116 to the outside environment. This allows air to freely enter and exit the rear chamber 116, thus contributing to the reduction of the resistance of the transducer diaphragm 112 during vibration.

[0057] Fig. Figure 7 shows an exemplary representation of the appearance of the converter according to some embodiments of the present description and Fig. Figure 8 shows an exemplary exploded view of the converter according to some embodiments described in this document. It refers to Fig. 7 and Fig. 8. In some embodiments, the sound-generating part 11 can comprise a diaphragm 1121, a coil 1122, a support 1123, a connector 1124, and a magnetic circuit assembly 1125. The support 1123 provides a mounting platform. The loudspeaker 112 can be connected to the housing 111 via the support 1123. The connector 1124 is attached to the support 1123. The connector 1124 can serve for circuit connection (e.g., for connecting a cable). The coil 1122 is connected to the diaphragm 1121 and is located at least partially within a magnetic gap formed by the magnetic circuit assembly 1125. The magnetic circuit assembly 1125 exerts a force on the energized coil 1122, causing the diaphragm 1121 to vibrate mechanically and thus generating sound that propagates through a medium such as air. The magnetic circuit arrangement 1125 can comprise a magnetically conductive plate 11251, a magnet 11252 and a receiving element 11253.The magnetically conductive plate 11251 is located between the magnet 11252 and the membrane 1121 and adheres to the surface of the magnet 11252.

[0058] Fig. Figure 9 shows an exemplary representation of an internal structure of the sound-generating part according to some embodiments of the present description and Fig. Figure 10 shows an exemplary structural representation of the diaphragm according to some embodiments described in this document. The sound-generating part 11 comprises a diaphragm 1121, a coil 1122, a support 1123, and a magnetic circuit assembly 1125. The support 1123 is arranged around the diaphragm 1121, the coil 1122, and the magnetic circuit assembly 1125 and serves to provide a mounting platform. The sound-generating part 11 can be connected to the housing 111 via the support 1123. The coil 1122 projects into the magnetic circuit assembly 1125 and is connected to the diaphragm 1121. The magnetic circuit assembly 1125 exerts a force on the energized coil 1122, causing the diaphragm 1121 to vibrate mechanically. This generates sound, which propagates through a medium such as air and is emitted through the sound outlet opening.In some embodiments, the magnetic circuit arrangement 1125 comprises a magnetically conductive plate 11251, a magnet 11252, and a receiving element 11253. The magnetically conductive plate 11251 and the magnet 11252 are connected to each other. The side of the magnet 11252 furthest from the magnetically conductive plate 11251 is mounted on the bottom wall of the receiving element 11253, and a gap exists between the circumference of the magnet 11252 and the inner side wall of the circumference of the receiving element 11253. In some embodiments, the outer side wall of the circumference of the receiving element 11253 is connected to and attached to the support 1123. In some embodiments, both the receiving element 11253 and the magnetically conductive plate 11251 can be made of magnetically conductive material (e.g., iron). In some embodiments, the circumference of the membrane 1121 can be connected to the support 1123 via a fastening ring 1155.In some embodiments, the material of the retaining ring 1155 may comprise stainless steel or other metallic materials to allow adaptation to the processing and manufacturing processes of the membrane 1121. It is applied to . Fig. 8. The magnetic circuit arrangement 1125 can comprise a magnetically conductive plate 11251, a magnet 11252, and a receiving element 11253. Both the receiving element 11253 and the magnetically conductive plate 11251 can be made of magnetically conductive material (e.g., iron). In some embodiments, the receiving element 11253 comprises a base 11253a and a circumferential side wall 11253b. The base 11253a and the side wall 11253b enclose a receiving space in which the magnetically conductive plate 11251 and the magnet 11252 are housed. The magnetically conductive plate 11251 and the magnet 11252 are connected to each other. The side of the magnet 11252 furthest from the magnetically conductive plate 11251 is mounted on the base 11253a of the receiving element, and there is a gap between the circumference of the magnet 11252 and the circumferential side wall 11253b of the receiving element 11253.In some embodiments, the coil 1122 can protrude into the gap between the magnet 11252 and the side wall 11253b.

[0059] In some embodiments, to ensure that at least part of the coil 1122 is located in a region of high magnetic flux density within the magnetic circuit arrangement 1125 during the upward and downward oscillation of the diaphragm 1121, and thus to increase the magnetic field utilization efficiency of the magnetic circuit arrangement 1125, the distance dd between the center point J of the coil 1122 and the center point K of the magnetically conductive plate 11251 in the direction of oscillation of the diaphragm 1121 can be less than 0.3 mm. For example, the center point J of the coil 1122 and the center point K of the magnetically conductive plate 11251 can lie essentially on the same horizontal line to allow a greater force from the magnetic circuit arrangement 1125 on the coil 1122 and thus provide the driving force for the oscillation of the diaphragm 1121.

[0060] It will be on Fig. 9 and Fig. 10. In some embodiments, the diaphragm 1121 can comprise a main area 11211 and a surround area 11212 that surrounds the main area 11211. In some embodiments, the main area 11211 comprises a first inclined segment 11211a and a first connecting segment 11211b that is connected to the coil 1122. As in Fig. As shown in Figure 9, the first connecting segment 11211b serves to connect to the coil 1122. The first connecting segment 11211b runs parallel to the direction Z of the short axis and perpendicular to the direction of vibration of the diaphragm. The first inclined segment 11211a rests against a portion of the surround area 11212. In some embodiments, the first inclined segment 11211a is inclined away from the coil 1122 relative to the first connecting segment 11211b. With reference to Fig. 9 and Fig. In section 10, the coil 1122 is located below the first connecting segment 11211b, and the first inclined segment 11211a is inclined upwards (i.e., away from the coil 1122) relative to the first connecting segment 11211b. This prevents the adhesive used to bond the coil 1122 to the diaphragm 1121 from leaking into the surround area 11212 and thus corroding the surround area 11212, which could impair the vibration characteristics of the diaphragm 1121.

[0061] In some embodiments, the magnetic circuit system 1125 mainly comprises a magnetically conductive plate 11251, a magnet 11252, and a receiving element 11253. The magnetically conductive plate 11251 and the magnet 11252 are connected to each other. The side of the magnet 11252 furthest from the magnetically conductive plate 11251 is mounted on the bottom wall of the receiving element 11253, and a gap exists between the circumference of the magnet 11252 and the inner side wall of the circumference of the receiving element 11253. The coil 1122 can project into the gap between the magnet 11252 and the receiving element 11253. An excessively large distance between the coil 1122 and the side wall of the receiving element 11253 would result in the coil not being located in the area of ​​high magnetic flux density of the magnetic circuit arrangement 1125, which would reduce the driving force provided by the magnetic circuit arrangement 1125 for the diaphragm 1121.Too small a gap would pose a risk of the coil 1121 colliding with the receiving element 11253. Therefore, to avoid a collision of the coil 1121 and simultaneously ensure the driving force for the diaphragm 1121 provided by the magnetic field, in some embodiments the distance wt between the coil 1122 and the side wall of the magnet 11252 in the aforementioned gap can be 0.1 mm to 0.25 mm, and the distance ww between the coil 1122 and the inner side wall of the circumference of the receiving element 11253 can be 0.1 mm to 0.5 mm. In some embodiments, the distance wt between the coil 1122 and the side wall of the magnet 11252 can be 0.12 mm to 0.24 mm and the distance ww between the coil 1122 and the inner side wall of the circumference of the receiving element 11253 can be 0.15 mm to 0.3 mm.In some embodiments, the distance wt between the coil 1122 and the side wall of the magnet 11252 in the aforementioned gap can be 0.17 mm to 0.21 mm, and the distance ww between the coil 1122 and the inner side wall of the circumference of the receiving element 11253 can be 0.19 mm to 0.23 mm. In some embodiments, the distance wt between the coil 1122 and the side wall of the magnet 11252 can be 0.2 mm, and the distance ww between the coil 1122 and the inner side wall of the circumference of the receiving element 11253 can be 0.2 mm. An excessively large distance h3 between the coil 1122 and the base 11253a of the receiving element 11253 would increase the overall volume of the sound-generating part 11. A distance h3 that is too small between the coil 1122 and the base 11253a of the receiving element 11253 in the direction of vibration of the diaphragm 1121 would pose a risk of the coil 1121 colliding with the receiving element 11253.Therefore, to avoid excessive volume of the sound-generating part 11 and simultaneously prevent collision of the coil 1121, in some embodiments the distance h3 between the coil 1122 and the base 11253a of the receiving element 11253 (i.e., the distance between the end of the coil 1122 furthest from the diaphragm 1121 and the base wall of the receiving element 11253) can be 0.2 mm to 4 mm. In some embodiments, the distance h3 between the coil 1122 and the base wall of the receiving element 11253 can be 0.6 mm to 3 mm. In some embodiments, the distance h3 between the coil 1122 and the base wall of the receiving element 11253 can be 1 mm to 2 mm. In some embodiments, the distance h3 between the coil 1122 and the bottom wall of the receiving element 11253 can be 1.4 mm to 1.6 mm.

[0062] In some embodiments, the position of the coil 1122 relative to the magnetic circuit arrangement 1125 can be changed by adjusting the inclination angle β of the first inclined segment 11211a relative to the first connecting segment 11211b. This allows the thrust force acting on the coil 1122 to be kept largely constant, which reduces distortion in the low-frequency range of the sound-generating part 11 and improves the sound impression in the low-frequency range. Additionally, adjusting the inclination angle β of the first inclined segment 11211a relative to the first connecting segment 11211b prevents adhesive from leaking from the coil 1122 into the surround area 11212. This protects the surround area 11212 from corrosion and prevents any impairment of its vibration.The inclination angle β of the first inclined segment 11211a relative to the first connecting segment 11211b refers to the angle between the first inclined segment 11211a and the straight line on which the first connecting segment 11211b lies, in a direction away from the first connecting segment 11211b, as shown in . Fig. 10 shown.

[0063] In some embodiments, the inclination angle β of the first inclined segment 11211a relative to the first connecting segment 11211b can be in the range of 5° to 30° to reduce the distortion of the sound-generating part 11 and simultaneously prevent corrosion of the corrugated area 11212 as well as impairment of the vibration of the corrugated area 11212. In some embodiments, the inclination angle β of the first inclined segment 11211a relative to the first connecting segment 11211b can be in the range of 10° to 25° to further reduce the distortion of the sound-generating part 11. For example, the inclination angle β of the first inclined segment 11211a relative to the first connecting segment 11211b can be 15°. As another example, the inclination angle β of the first inclined segment 11211a relative to the first connecting segment 11211b can be 22°.

[0064] In some embodiments, the minimum distance between the coil 1122 and the first inclined segment 11212a is not less than 0.3 mm. This means that the distance between, on the one hand, the connection point of the first inclined segment 11212a with the first connecting segment 11211b and, on the other hand, the connection area of ​​the coil 1122 with the first connecting segment 11211b, is not less than 0.3 mm. This ensures a safety distance between the bead area 11212 and the mounting position of the coil 1122 to prevent the adhesive from leaking into the bead area 11212 during assembly of the coil 1122.

[0065] In some embodiments, the beaded area 11212 comprises a second inclined segment 11212a, which at least partially abuts the first inclined segment 11211a. The main area 11211 and the beaded area 11212 are connected to each other via the first inclined segment 11211a and the second inclined segment 11212a. In some embodiments, the first inclined segment 11211a and the second inclined segment 11212a can be joined together by adhesive to simplify the bonding process. In some embodiments, the second inclined segment 11212a can be positioned on the side of the first inclined segment 11211a closest to the coil 1122 to create the connection between the main area 11211 and the beaded area 11212.In some embodiments, the second inclined segment 11212a can be positioned on the side of the first inclined segment 11211a facing away from the coil 1122, in order to both enable the connection between the main area 11211 and the beaded area 11212 and to further reduce the corrosion of the beaded area 11212 caused by adhesive when bonding the coil 1122.

[0066] Since the vibration amplitude of the membrane 1121 is greater at low frequencies, the corrugated area 11212, designed as a flat surface, would impair the vibration amplitude of the membrane 1121 due to its lower deformability. Therefore, to ensure good deformability of the membrane 1121, the corrugated area 11212 can, in some embodiments, include an arc-shaped segment 11212c.

[0067] In some embodiments, the ratio of the height h1 to the span w1 of the arc-shaped segment 11212c can influence the deformability of the arc-shaped segment 11212c. The height of the arc-shaped segment 11212c refers to the distance between the highest and lowest points of the arc-shaped segment 11212c in the direction of vibration of the membrane 1121. As shown in Fig. As shown in Figure 10, the height of the arc-shaped segment 11212c is denoted as h1. The span of the arc-shaped segment 11212c refers to the maximum distance between two points on the arc-shaped segment 11212c. As shown in Fig. As shown in Figure 10, the span of the arc-shaped segment 11212c is denoted as w1. If the ratio of the height h1 to the span w1 of the arc-shaped segment 11212c is too small, the degree of convexity of the arc-shaped segment 11212c is too low, which can lead to an almost flat structure with low deformability. If the ratio of the height h1 to the span w1 of the arc-shaped segment 11212c is too large, the degree of convexity of the arc-shaped segment 11212c is too high, which can significantly impede the vibration of the diaphragm 1121 and impair the output of the sound-generating part 11. Therefore, in some embodiments, the ratio of the height h1 to the span w1 of the arc-shaped segment 11212c can be in the range of 0.35 to 0.4 to ensure good output and low distortion of the sound-generating part 11.In some embodiments, the ratio of the height h1 to the span w1 of the arc-shaped segment 11212c can be in the range of 0.36 to 0.39 to further improve the output of the sound-generating part 11. In some embodiments, the ratio of the height h1 to the span w1 of the arc-shaped segment 11212c can be in the range of 0.37 to 0.38 to further reduce the distortion of the sound-generating part 11. For example, the ratio of the height h1 to the span w1 of the arc-shaped segment 11212c can be 0.38.

[0068] In some embodiments, the height h1 of the arc-shaped segment 11212c can range from 0.5 mm to 0.7 mm. For example, the height h1 of the arc-shaped segment 11212c can range from 0.55 mm to 0.65 mm. In some embodiments, the height h1 of the arc-shaped segment 11212c can be 0.6 mm. Taking dimensional errors into account, in some embodiments the height h1 of the arc-shaped segment 11212c can be 0.6 mm ± 0.05 mm. In some embodiments, the span (width) w2 of the arc-shaped segment 11212c of the corrugated area 11212 can be less than twice the radius of curvature r1. In some embodiments, the radius of curvature r1 of the arc-shaped segment 11212c of the corrugated area 11212 can be in the range of 0.7 mm to 0.9 mm. In some embodiments, the radius of curvature r1 of the arc-shaped segment 11212c of the corrugated area 11212 can be in the range of 0.75 mm to 0.88 mm.In some embodiments, the radius of curvature r1 of the arc-shaped segment 11212c of the beading area 11212 can be in the range of 0.8 mm to 0.83 mm. In some embodiments, the span w1 of the arc-shaped segment 11212c of the beading area 11212 can be in the range of 1.2 mm to 1.7 mm. In some embodiments, the span w1 of the arc-shaped segment 11212c of the beading area 11212 can be in the range of 1.3 mm to 1.65 mm. In some embodiments, the span w1 of the arc-shaped segment 11212c of the beading area 11212 can be in the range of 1.5 mm to 1.6 mm. In some embodiments, the radius of curvature r1 of the arc-shaped segment 11212c of the corrugation area 11212 can be 0.82 mm and the span w1 of the arc-shaped segment 11212c of the corrugation area 11212 can be 1.58 mm.Taking into account dimensional errors, in some embodiments the radius of curvature r1 of the arc-shaped segment 11212c of the beading area 11212 can be 0.82 mm ± 0.05 mm and the span w1 of the arc-shaped segment 11212c of the beading area 11212 can be 1.58 mm ± 0.1 mm.

[0069] In some embodiments, the corrugated region 11212 can also comprise a wave-like structure consisting of several arc-shaped segments 11212c, wherein any two adjacent arc-shaped segments 11212c are oriented in opposite directions. Providing the wave-like structure can ensure that the degree of restraint of the upward and downward vibration of the diaphragm 1121 during the vibration process is as symmetrical as possible, which reduces the distortion level of the sound-generating part 11 and improves the low-frequency output of the sound-generating part 11. In some embodiments, the height-to-span ratio of each arc-shaped segment 11212c in the multiple arc-shaped segments 11212c can be the same as the height-to-span ratio of the single arc-shaped segment 11212c described above.In some embodiments, the ratio of the height to the span of each arc-shaped segment 11212c can differ among the multiple arc-shaped segments 11212c. For example, in the radial direction of the membrane 1121, the height of each arc-shaped segment 11212c among the multiple arc-shaped segments 11212c can gradually decrease from the center to the edge of the membrane 1121, while the span of each arc-shaped segment 11212c remains constant.

[0070] To limit the diaphragm 1121 at large vibration amplitudes and to prevent the coil 122 from contacting the magnetic circuit assembly 1125, in some embodiments the main area 11211 can include a domed dome 11211c located at the end of the first connecting segment 11211b furthest from the first inclined segment 11211a. The domed dome 11211c has the same curvature direction as the arc-shaped segment 11212c, i.e., the domed dome 11211c projects away from the coil 1122. The domed dome 11211c prevents the diaphragm 1121 from wobbling at large vibration amplitudes and ensures that the coil 1122 and the magnetic circuit assembly 1125 do not collide.At the same time, the domed dome 11211c exhibits high strength and stiffness, which to some extent suppresses the partial vibrations of the main area 11211 and thereby improves the high-frequency vibration characteristics of the transducer 112. Without a front cover, increasing the height-to-span ratio of the dome (i.e., the ratio of height to span) would increase the high-frequency bandwidth. However, an excessively high height-to-span ratio of the dome could lead to increased unevenness and an increase in overall dimensions.

[0071] In some embodiments, the height h2 of the dome 11211c is related to the size of the dome 11211c in the direction of curvature (i.e., the span w2). The height of the dome 11211c refers to the distance between the highest point of the dome 11211c and the lowest point of the dome 11211c (namely, the endpoints connected to the first connecting segment 11211b) in the direction of vibration of the membrane 1121. As in Fig. As shown in Figure 10, the height of dome 11211c is denoted as h2. The span of dome 11211c refers to the maximum distance between two points on dome 11211c. As shown in Figure 10, the height of dome 11211c is denoted as h2. Fig. As shown in Figure 10, the span of the dome 11211c is denoted as w2. The larger the span w2 of the dome 11211c, the greater the height h2 of the dome 11211c must be to maintain the domed structure of the dome 11211c (e.g., to keep the radian dimension corresponding to the dome 11211c within a predefined radian range). This could lead to an excessive overall thickness of the transducer 112. Considering the overall thickness and the structural design of the transducer 112, in some embodiments the predefined radian range corresponding to the dome 11211c of the main area 11211 of the diaphragm 1121 can be from 0.5263 rad to 3.1416 rad. In some embodiments, the predefined arc length range to which the dome 11211c of the main area 11211 of the membrane 1121 corresponds can be 0.7869 rad to 3.1416 rad.In some embodiments, the predefined radian range corresponding to the dome 11211c of the main area 11211 of the membrane 1121 can be from 1.0526 rad to 3.1416 rad. In some embodiments, the predefined radian range corresponding to the dome 11211c of the main area 11211 of the membrane 1121 can be from 1.5789 rad to 3.1416 rad. In some embodiments, the predefined radian range corresponding to the dome 11211c of the main area 11211 of the membrane 1121 can be from 2.1053 rad to 3.1416 rad. In some embodiments, the predefined arc length range to which the dome 11211c of the main area 11211 of the membrane 1121 corresponds can be 2.6316 rad to 3.1416 rad. In some embodiments, the width w2 of the dome 11211c of the main area 11211 can be 2 mm to 8 mm. In some embodiments, the width w2 of the dome 11211c of the main area 11211 can be 3 mm to 7 mm.In some embodiments, the width w2 of the dome 11211c of the main area 11211 can be 4 mm to 6 mm. In some embodiments, the width w2 of the dome 11211c of the main area 11211 can be 4.8 mm. In some embodiments, the height h2 of the dome 11211c of the main area 11211 (i.e., the distance between the highest and lowest points of the dome 11211c in the direction of vibration of the membrane) can be in the range of 0.7 mm to 1.2 mm. In some embodiments, the height h2 of the dome 11211c of the main area 11211 can be 0.9 mm to 1.1 mm. In some embodiments, the height h2 of the dome 11211c of the main area 11211 can be 1 mm to 1.05 mm. In some embodiments, the height h2 of the dome 11211c of the main area 11211 can be 0.8 mm. Taking machining errors into account, in some embodiments the height h2 of the dome 11211c of the main area 11211 can be 0.8 mm ± 0.08 mm.

[0072] In some embodiments, the ratio of the height h2 to the span w2 of the dome 11211c can influence the overall dimensions of the sound-generating part 11 and the vibration of the diaphragm 1121. If the ratio of height h2 to span w2 of the dome 11211c is too small, the degree of convexity of the dome 11211c is too low, resulting in an almost planar structure of the dome 11211c. In this case, the dome 11211c exhibits lower strength and stiffness, increasing the probability of partial vibrations of the dome 11211c. This can lead to increased peaks and troughs in the high-frequency range and impair the high-frequency vibration characteristics of the transducer 112. If the ratio of height h2 to span w2 of the dome 11211c is too large, the degree of convexity of the dome 11211c is too high. This could lead to an excessive overall thickness of the converter 112 and increase the unevenness and overall dimensions.Therefore, the ratio of the height h2 to the span w2 of the dome 11211c can be in the range of 0.1 to 0.6 to ensure an adequate overall thickness of the sound-generating part 11 and to improve the high-frequency vibration characteristics of the sound-generating part 11. In some embodiments, the ratio of the height h2 to the span w2 of the dome 11211c can be in the range of 0.1 to 0.4 to further improve the high-frequency vibration characteristics of the transducer 112. In some embodiments, the ratio of the height h2 to the span w2 of the dome 11211c can be in the range of 0.1 to 0.3 to further improve the high-frequency vibration characteristics of the transducer 112.

[0073] In some embodiments, taking into comprehensive consideration the structural strength, technical feasibility and overall thickness limitation of the sound-generating part 11, and adhering to the maximum vibration amplitude of the diaphragm 1121 in order to avoid a collision of the diaphragm 1121 with the magnetically conductive plate 11251 during the vibration process, the distance (as the distance hd in Fig. 9) between the lowest point of the dome 11211c of the main region 11211 of the membrane 1121 and the uppermost region of the magnetically conductive plate 11251 in the magnetic circuit arrangement 1125, in the direction of vibration of the membrane, is greater than 0.8 mm. In some embodiments, the distance hd between the lowest point of the dome 11211c of the main region 11211 of the membrane 1121 and the uppermost region of the magnetically conductive plate 11251 in the magnetic circuit system 1125 can be 0.85 mm to 0.95 mm, namely 0.9 mm ± 0.05 mm. Here, 0.9 mm corresponds to the structural dimension and 0.05 mm to the dimensional error margin. In some embodiments, the distance hd between the lowest point of the dome 11211c of the main area 11211 of the membrane 1121 and the uppermost area of ​​the magnetically conductive plate 11251 in the magnetic circuit system 1125 can be 0.86 mm to 0.93 mm.In some embodiments, the distance hd between the lowest point of the dome 11211c of the main area 11211 of the membrane 1121 and the uppermost area of ​​the magnetically conductive plate 11251 in the magnetic circuit system 1125 can be 0.88 mm to 0.92 mm.

[0074] Fig. Figure 11A shows an exemplary schematic representation of a high-frequency bandwidth of the sound-generating section according to some embodiments of the present description. As in Fig. As shown in Figure 11A, the frequency response curve of the sound-generating part 11 exhibits a first inflection point f0 in the low-frequency range, with f0 being located approximately at 300 Hz. f0 is related to the stiffness of the surround area 11212 of the diaphragm 1121 and the vibrating weight (mainly the weight of the main area 11211). A second inflection point f h It is at approximately 25 kHz. h can be determined based on the overall trend of the frequency response curve. From f hAt 25 kHz, the curve shows a generally downward trend despite local small peaks. The peak values ​​of the frequency band between f0 and f h (i.e., between 300 Hz and 25 kHz) are selected and averaged to establish a first reference line L m to form, like the upper straight line in Fig. 11A. A second straight line L is created by a 10 dB drop from this straight reference line. n (the lower straight line in Fig. 11A) formed, which corresponds to the selected bandwidth of 100 Hz to 45 kHz.

[0075] In some embodiments, the frequency of the high-frequency partial vibrations of the diaphragm 1121 is directly proportional to E / ρ. Here, E is the Young's modulus of the diaphragm 1121 and ρ is the equivalent density of the diaphragm 1121. Thus, E / ρ can determine the high-frequency bandwidth. If E is constant, a lower mass of the diaphragm 1121 leads to a lower equivalent density ρ of the diaphragm 1121, which increases E / ρ and widens the high-frequency bandwidth. If ρ is constant, a larger Young's modulus E of the diaphragm 1121 leads to a larger value of E / ρ, which increases the frequency of the high-frequency partial vibrations of the diaphragm 1121 and widens the high-frequency bandwidth.

[0076] In some embodiments, the range of high-frequency partial vibrations of the sound-generating part 11 refers to the region in which the frequency response curve drops sharply after reaching its highest peak, with alternating peak and trough values. As in Fig. As shown in 11A, the area to the right of f h , in which the frequency response curve after reaching the highest peak (i.e., the sound pressure level, f h The frequency at which the curve reaches its highest peak corresponds to the frequency at which high-frequency partial oscillations occur (such as f). h in Fig. (Figure 11A). In some embodiments, the frequency of the high-frequency partial vibrations of the main area 11211 (of the dome 11211c) can be designed to avoid large differences in the vibration of different parts of the main area 11211, which would lead to poor high-frequency performance. This allows the diaphragm 1121 to have a wide high-frequency bandwidth while reducing the occurrence of high-frequency partial vibrations within the bandwidth. In some embodiments, the frequency of the high-frequency partial vibrations of the dome 11211c cannot be less than 20 kHz. For example, the frequency of the high-frequency partial vibrations of the dome 11211c cannot be less than 25 kHz.In some embodiments, the mass of the main section 11211 must be low to ensure high output in the effective frequency band and to reduce vibration problems in the effective frequency band. Therefore, materials with low density and high strength, as well as appropriate structures, can be used for the main section 11211. Accordingly, the Young's modulus of the dome 11211c cannot be less than 6 GPa. In some embodiments, the Young's modulus of the dome 11211c can be in the range of 6 GPa to 7 GPa. For example, the Young's modulus of the dome 11211c can be 6.5 GPa. The Young's modulus of the dome 11211c can be determined by static or dynamic methods (e.g., impulse excitation methods, audio resonance methods, sound velocity measurement methods, etc.).

[0077] In some embodiments, the main area 11211 can be made of carbon fiber material. Fig. Figure 11B shows a schematic representation of an exemplary braided structure made of carbon fibers according to some embodiments described in this document. Carbon fiber material is characterized by low density and high strength, which contributes to the attenuation of the higher-order modes of the loudspeaker 112. In some embodiments, the main region 11211 can be formed by interlacing intersecting carbon fibers to further increase the strength of the main region 11211 and to reduce its equivalent density. The carbon fibers intersect at least partially at a first angle. In some embodiments, the first angle is in the range of 45° to 90°. For example, several independent carbon fibers can be interlaced at any angle, such as 45°, 60°, or 90°. As shown in Figure 11B, the main region 11211 can be formed by interlacing interlacing carbon fibers. Fig. As shown in Figure 11B, several carbon fibers 112111 and several carbon fibers 112112 can be interwoven at an angle of nearly 90°. In some embodiments, due to the extremely fine diameter of the carbon fibers, several carbon fibers 112111 and several carbon fibers 112112 can be arranged at an angle of nearly 90° and joined by bonding. In some embodiments, the main region 11211 can comprise a multilayered (e.g., 2-layered, 3-layered, etc.) structure of interwoven carbon fibers. To facilitate the interweaving of interwoven carbon fibers, in some embodiments the length of a single carbon fiber can be at least 5 mm. In some embodiments, the length of a single carbon fiber can be in the range of 5 mm to 10 mm. For example, the length of a single carbon fiber can be 7 mm.Since individual carbon fibers are too thin, interlacing them sequentially is difficult and practically impossible. In some embodiments, several carbon fibers can be laid and joined together (e.g., by gluing) to form multiple carbon fiber bundles, which are then interlaced at right angles to each other.

[0078] In some embodiments, the thickness of the main area 11211 can be designed from an ultra-aligned carbon fiber structure to reduce the weight of the main area 11211 and achieve a selected high-frequency bandwidth. In some embodiments, the thickness of the main area 11211 can be less than 80 µm. In some embodiments, the thickness of the main area 11211 can be in the range of 10 µm to 60 µm. In some embodiments, the thickness of the main area 11211 can be 25 µm.

[0079] Fig. Figure 12 shows a schematic representation of the vibration amplitude of the sound-generating component at different drive voltages according to some embodiments described in this document. As in Fig. As shown in Figure 12, the diaphragm 1121 of the transducer 112 oscillates at the same voltage with different oscillation amplitudes in two opposite directions (the positive and negative directions of the thickness direction X in Fig. 6, i.e., the positive and negative direction of the ordinate axis in Fig. 12). This is caused by the asymmetry of membrane 1121. The unit Vrms is in Fig. 12 represents the effective voltage value of a sinusoidal AC voltage signal. For example, 0.7 Vrms means an effective voltage value of 0.7 V for the input sinusoidal AC voltage signal. As in Fig. As shown in Figure 12, in the input voltage range of 0.4 V to 0.7 V, the oscillation amplitude (approx. 0.8 mm) of the downward oscillation of the diaphragm 1121 (in the negative direction of the ordinate axis) is greater than the oscillation amplitude (approx. 0.6 mm) of the upward oscillation (in the positive direction of the ordinate axis). The upward oscillation of the diaphragm 1121 refers to a vibration of the diaphragm 1121 in the direction of the front chamber 114, while the downward oscillation of the diaphragm 1121 refers to a vibration of the diaphragm 1121 in the direction of the rear chamber 116 (towards the magnetic circuit arrangement 1125). As shown in Fig. As shown in Figure 12, the vibration amplitude of the diaphragm 1121 gradually decreases with a further increase in input voltage (e.g., from 0.7 V to 1 V) and eventually approaches a threshold value. The vibration amplitude of the downward vibration of the diaphragm 1121 approaches a first threshold value (approx. 0.9 mm), while the vibration amplitude of the upward vibration approaches a second threshold value (approx. 0.8 mm). Since the vibration amplitude of the downward vibration of the diaphragm 1121 is greater than that of the upward vibration, all vibration amplitude specifications for the diaphragm 1121 in this description refer to the larger vibration amplitude of the downward vibration of the diaphragm 1121. In some embodiments, the maximum vibration amplitude of the diaphragm 1121 can be limited to no more than 0.8 mm to prevent a collision between the coil 1122 and the magnetic circuit arrangement 1125 during the vibration of the diaphragm 1121.This means that the vibration amplitude of the diaphragm 1121 can range from 0 mm to 0.8 mm. In some embodiments, the vibration amplitude of the diaphragm 1121 can range from 0 mm to 0.75 mm. In some embodiments, the vibration amplitude of the diaphragm 1121 can range from 0 mm to 0.7 mm.

[0080] In some embodiments, the difference between the vibration amplitudes of the diaphragm 1121 in two opposite directions (i.e., upward and downward vibration) can be less than 0.05 mm over an amplitude range of 0 mm to 0.8 mm, in order to reduce the distortion of the transducer 112. In some embodiments, the difference between the vibration amplitudes of the diaphragm 1121 in two opposite directions (i.e., upward and downward vibration) can be less than 0.04 mm, in order to further reduce the distortion of the transducer 112. In some embodiments, the difference between the vibration amplitudes of the diaphragm 1121 in two opposite directions (i.e., upward and downward vibration) can be less than 0.03 mm, in order to further reduce the distortion of the transducer 112.

[0081] It will be on Fig. 8 and Fig. 9. In some embodiments, the support 1123 is arranged around the magnetic circuit assembly 1125. As in Fig. As shown in Figure 9, the support 1123 can comprise a first part 112311, a second part 11232, and a third part 11233 in the direction of vibration of the membrane. The first part 112311 refers to the part between the highest point D of the connection area of ​​the support 1123 with the membrane 1121 and the highest point of the connection area of ​​the support 1123 with the receiving element 11253 in the direction of vibration of the membrane 1121. The second part 11232 refers to a region of the support 1123 provided with a ventilation opening. As shown in Fig. As shown in Figure 9, the second part 11232 is the part between the highest point of the connection area of ​​the support 1123 with the receiving element 11253 and the side wall of the support 1123 that supports the bottom of the ventilation opening (namely, the side wall facing the bottom 11253a of the receiving element 11253) in the direction of vibration of the membrane 1121. The third part 11233 refers to the part between the side wall of the support 1123 that supports the bottom of the ventilation opening and the bottom of the support 1123 located near the magnetic circuit arrangement 1125 (namely, the bottom that is close to the bottom 11253a of the receiving element 11253). As shown in Fig. As shown in Figure 10, a second connecting segment 11212b is provided at an end of the corrugated region 11212 that is far removed from the main region 11211. This second connecting segment 11212b serves to connect the membrane to the support 1123. The second connecting segment 11212b runs parallel to the direction Z of the short axis and perpendicular to the direction of vibration of the membrane. In some embodiments, the first part 112311 of the support 1123 is connected to the second connecting segment 11212b of the corrugated region 11212. In some embodiments, the second connecting segment 11212b of the corrugated region 11212 is connected to the first part 112311 of the support 1123 via a fastening ring 1155 in order to attach the membrane 1121 to the support 1123.

[0082] Fig. Figure 13 shows an exemplary structural representation of a substructure of the rear chamber according to some embodiments of the present description. It refers to Fig. 6 and Fig. 13. In some embodiments, a connecting bracket 115 may be provided in the housing 111. A second acoustic chamber, which may serve as the rear chamber 116, can be enclosed between the connecting bracket 115 and the support 1123 of the transducer 112. The rear chamber 116 is separated from other structures in the housing 111 (e.g., the main control circuit board), which is advantageous for improving the acoustic expressiveness of the sound-generating part 11. The housing 111 is provided with a pressure relief opening (e.g., the first pressure relief opening 111c and / or the second pressure relief opening 111d). The connecting bracket 115 is equipped with an acoustic channel 1151 that connects the pressure relief opening to the rear chamber 116 in order to connect the rear chamber 116 to the external environment.This means that air can freely enter and exit the rear chamber 116, which is useful for reducing the resistance of the diaphragm 1121 of the transducer 112 during oscillation.

[0083] In some embodiments, the cross-section of the rear chamber 116 can consist of two perpendicular sides and one curved side. Connecting the two endpoints of the curved side, the cross-section (e.g., cross-section ABC) can be approximated as a triangle. The inclined side AC is formed by the line connecting the two endpoints where the curved surface of the connecting bracket 115 contacts the two straight sides of the support 1123. In some embodiments, the thickness h4 of the first part 112311 of the support 1123 in the direction of vibration of the diaphragm 1121 can influence the volume of the rear chamber 116. If the thickness h4 of the first part 112311 increases, the volume of the rear chamber 116 decreases, assuming a constant total volume of the sound-generating part 11. Conversely, the volume of the rear chamber 116 increases when the thickness h4 of the first part 112311 decreases.In some embodiments, the thickness of the first part 112311 of the support 1123 can influence the volume of the rear chamber 116 and thus the resonance frequency of the rear chamber 116. In some embodiments, the rear chamber 116 can be defined as a chamber formed behind the diaphragm. In this case, an increase in the thickness h4 of the first part 112311 of the support 1123, while keeping the total volume of the sound-generating part 11 constant, increases the volume of the rear chamber 116. Conversely, the volume of the rear chamber 116 decreases when the thickness h4 of the first part 112311 decreases.

[0084] In some embodiments, the combination of the rear chamber 116 and the pressure relief opening provided on the housing 111 (e.g., the first pressure relief opening 111c and / or the second pressure relief opening 111d) can be considered a Helmholtz resonance model. In this case, the rear chamber 116 serves as the chamber of the Helmholtz resonance model, and the pressure relief opening acts as the neck of the Helmholtz resonance model. The resonance frequency of the Helmholtz resonance model then corresponds to the resonance frequency f2 of the rear chamber 116. In the Helmholtz resonance model, the volume of the chamber (e.g., the rear chamber 116) can influence the resonance frequency f of the chamber (e.g., the rear chamber 116), as shown in equation (1): f=c2πSVL

[0085] Here, c represents the speed of sound, S the cross-sectional area of ​​the neck (e.g., the pressure relief opening), V the volume of the chamber (e.g., the rear chamber 116), and L the depth of the neck (e.g., the pressure relief opening).

[0086] Formula (1) shows that, with a constant cross-sectional area S and depth L of the pressure relief opening (e.g., the first pressure relief opening 111c and / or the second pressure relief opening 111d), an increase in the volume of the rear chamber 116 leads to a reduction in the resonance frequency f2 of the rear chamber 116, namely its shift in the direction of lower frequencies.

[0087] Fig. Figure 14 shows a diagram of frequency response curves of the rear chamber as a function of different thicknesses of the first part 112311 according to some embodiments of the present description. Fig. Figure 14 shows that with an increase in the thickness h4 of the first part 112311 of the support 1123 from 0.3 mm to 3 mm, the volume of the rear chamber 116 gradually increases and the resonance peak of the rear chamber 116 gradually shifts towards lower frequencies. This reduces the flat area of ​​the frequency response curve and impairs the output quality of the sound-generating part 11.

[0088] If the thickness h4 of the first part 112311 is too small, the vibration amplitude of the diaphragm 1121 is limited by the support 1123. If the thickness h4 of the first part 112311 is too large, excessive overall dimensions of the sound-generating part 11 result, and the resonance peak of the rear chamber 116 shifts towards lower frequencies, reducing the flat area of ​​the frequency response curve of the rear chamber 116 and impairing the sound quality of the sound-generating part 11. The thickness of the first part 112311 refers to the minimum distance in the vibration direction of the diaphragm 1121 between the connection area of ​​the support 1123 with the surround area 11212 and the area directly adjacent to the magnetic circuit assembly 1125.

[0089] In some embodiments, the thickness h4 of the first part 112311 of the carrier 1123 can be in the range of 0.3 mm to 3 mm to ensure high low-frequency output from the sound-generating part 112 and to enable a large, flat region of the frequency response curve of the rear chamber 116. In some embodiments, the thickness h4 of the first part 112311 can be in the range of 0.5 mm to 2 mm to further improve the low-frequency output of the transducer 112. In some embodiments, the thickness h4 of the first part 112311 can be in the range of 0.8 mm to 1 mm to further increase the flat region of the frequency response curve of the rear chamber 116. In some embodiments, the thickness h4 of the first part 112311 can be 0.9 mm.In this case, the resonance peak of the rear chamber 116 is at about 6.1 kHz, the sound generation part 11 has a good low-frequency output, and the frequency response curve of the rear chamber 116 has a wide, flat range.

[0090] In some embodiments, the weight of the transducer 112 depends primarily on the support 1123 and the magnetic circuit assembly 1125, with the magnetic circuit assembly 1125 accounting for a larger proportion of the weight. In some embodiments, an increase in the weight of the support 1123, while using the same material, indicates larger dimensions of the support 1123, which may correspond to a larger area of ​​the diaphragm 1121. In some embodiments, an increase in the weight of the magnetic circuit assembly 1125 leads to a higher magnetic flux density around the coil 1122, which increases the driving force exerted on the coil. This increases the vibration amplitude of the diaphragm 1121, resulting in the transducer 112 exhibiting higher sensitivity and improved low-frequency performance.However, if the weight of the transducer 112 is too great, excessive weight 11 of the sound generation part 11 is caused, which impairs the wearing stability and wearing comfort of the open-ear headphones 10.

[0091] Taking into account the two wearing scenarios – at least partial coverage of the antihelix area by the sound-generating part 11 (as in Fig. 3 shown) and partial or complete protrusion of the sound-producing part 11 into the cavum conchae (as in Fig. (4 shown) - the volume audible to the ear can be increased (which corresponds to a higher sound generation power). Therefore, the weight of the transducer 112 can be reduced, among other things, by decreasing the size of the diaphragm 1121 or the weight of the magnetic circuit assembly 1125. This allows the transducer 112 to have high sensitivity and low-frequency output while maintaining high wearing stability and comfort of the open-ear headphones 10. In some embodiments, the weight of the transducer 112 can be in the range of 1.1 g to 3.3 g. In some embodiments, the weight of the transducer 112 can be in the range of 1.5 g to 3 g to further improve the sensitivity and low-frequency output of the transducer 112. In some embodiments, the weight of the transducer 112 can be in the range of 2 g to 2.5 g in order to further optimize the wearing stability and comfort of the open-ear headphones 10.In some embodiments, the weight of the converter 112 can be 2.2 g.

[0092] Fig. Figure 15 shows a diagram of frequency response curves of the sound-generating component at different drive voltages according to some embodiments described in this document. If the diaphragm area of ​​the loudspeaker 112 is positioned at a distance of 4 mm directly opposite a test sound source and a voltage in the range of 0.1 V to 0.7 V is applied to the loudspeaker 112, the frequency response curves of the loudspeaker 112 at different drive voltages can be determined (as shown in Figure 15). Fig. Figure 15), where the test frequency range is set to 20 Hz to 20,000 Hz. With reference to Fig. 12 and Fig. 15. The vibration amplitude of the diaphragm 1121 lies in the range of 0 mm to 0.8 mm when the input voltage is in the range of 0.1 V to 0.7 V and the frequency is in the range of 20 Hz to 6.1 kHz. To prevent the vibrating coil 1122 from touching the base 11253a of the receiving element, the distance h3 between the base of the coil 1122 and the base 11253a of the receiving element (as in Fig. 9) may be greater than 0.8 mm. In some embodiments, the distance h3 between the bottom of the coil 1122 and the bottom 11253a of the receiving element (as shown in 9) may be greater than 0.8 mm. Fig. (9 shown) can be limited to a maximum of 0.9 mm to achieve small dimensions for the sound-generating part 11 and to increase wearing comfort for the user. Therefore, the distance h3 between the base of the coil 1122 and the base 11253a of the receiving element (as shown in Fig. 9 shown) in the range of 0.8 mm to 0.9 mm when the input voltage is in the range of 0.1 V to 0.7 V and the frequency is in the range of 20 Hz to 6.1 kHz.

[0093] As in Fig. As shown in Figure 15, the output of the sound-generating part 11 gradually increases and the sensitivity increases when the input voltage is gradually increased from 100 mV to 700 mV. However, the peak resonance frequency remains largely unchanged at approximately 6.1 kHz. Considering the two wearing scenarios—at least partial coverage of the antihelix area by the sound-generating part 11 (as shown in Figure 15)—the following applies: Fig. 3 shown) and partial or complete protrusion of the sound-producing part 11 into the cavum conchae (as in Fig. 4 shown) - the sound-generating part 11 exhibits high sensitivity when the distance h3 between the bottom of the coil 1122 and the bottom 11253a of the receiving element (as in Fig. (shown in 9) is controlled in the range of 0.8 mm to 0.9 mm. As shown in Fig. As shown in Figure 15, the sound pressure level (SPL) of the sound generating part 11 is in the range of 85 dB to 103 dB at a frequency of 1 kHz when the input voltage is between 100 mV and 700 mV.

[0094] In some embodiments, as already mentioned, the thickness h4 of the first part 112311 of the support 1123 can range from 0.3 mm to 3 mm. If the thickness h4 of the first part 112311 increases to 3 mm, the corresponding resonance frequency f2 of the rear chamber 116 decreases to 3.3 kHz, which reduces the flat area and impairs the sound quality. In some embodiments, the thickness h4 of the first part 112311 can be less than 3 mm to increase the flat area and improve the sound quality of the sound-generating part 11, provided that the resonance frequency f2 of the rear chamber 116 is not less than 3.3 kHz. In some embodiments, the resonance frequency f2 of the rear chamber 116 is not less than 3.5 kHz to further improve the sound quality of the sound-generating part 11.In some embodiments, the resonance frequency f2 of the rear chamber 116 cannot be less than 4 kHz in order to further improve the sound quality of the sound-generating part 11. In some embodiments, the resonance frequency f2 of the rear chamber 116 cannot be less than 6 kHz in order to further improve the sound quality of the sound-generating part 11.

[0095] In some embodiments, the volume of the rear chamber 116 can influence the resonance frequency f2 of the rear chamber 116 according to formula (1). The volume of the rear chamber 116 is influenced by the thickness h4 of the first part 112311 of the support 1123. Based on the range of values ​​for the thickness h4 of the first part 112311 and the range of values ​​for the resonance frequency f2 of the rear chamber 116, the range of values ​​for the volume of the rear chamber 116 can be determined. In some embodiments, the volume of the rear chamber 116 can be in the range of 60 mm³. 3up to 110 mm 3 lay.

[0096] Fig. Figure 16 shows a schematic representation of exemplary positions of the support, the first pressure relief opening, and the second pressure relief opening according to some embodiments described in this document. As in Fig. As shown in Figure 16, the support 1123 is provided with several ventilation openings 11231 in some embodiments. By providing the ventilation openings 11231, the sound can be transmitted from the rear of the membrane 1121 via the multiple ventilation openings 11231 to the rear chamber 116 and to the pressure relief opening and propagate into the external environment, thereby providing channels for effective sound radiation on both sides of the membrane 1121.

[0097] In some embodiments, the multiple ventilation openings 11231 can be arranged asymmetrically to achieve better airflow balance and to stabilize the air pressure in the rear chamber 116. For example, the multiple ventilation openings 11231 can be positioned asymmetrically around the short axis of the support 1123 as its center. Specifically, the support 1123 is provided with a first ventilation opening 11231a and a second ventilation opening 11231b. As shown in Fig. As shown in Figure 16, the distance La between the center of the first vent 11231a and the center of the second pressure relief 111d is greater than the distance Lb between the center of the second vent 11231b and the center of the second pressure relief 111d. In some embodiments, the air pressure in the rear chamber 116 is higher at positions farther from the second pressure relief 111d. To compensate for the air pressure in the rear chamber 116, the area of ​​the first vent 11231a is therefore larger than that of the second vent 11231b.In other words, vent openings located closer to the second pressure relief opening 111d (or the first pressure relief opening 111c) have a smaller area, while vent openings located farther from the second pressure relief opening 111d (or the first pressure relief opening 111c) have a larger area to equalize the air pressure in the rear chamber 116. The distance between a vent opening 11231 and a pressure relief opening refers to the distance between the center of the vent opening 11231 and the center of the corresponding pressure relief opening. In this description, the center of a vent opening or pressure relief opening refers to the geometric center of the opening structure.

[0098] In the rear chamber 116, the air pressure is higher at positions farther from the first pressure relief vent 111c and / or the second pressure relief vent 111d. Therefore, the vents 11231 can be designed with a larger area. At positions near the first pressure relief vent 111c and / or the second pressure relief vent 111d, the air pressure is lower, so the vents 11231 can be designed with a smaller area. If all vents 11231 have the same area, the air pressure is higher in the areas of the rear chamber 116 farther from the first pressure relief vent 111c and / or the second pressure relief vent 111d.However, since the ventilation openings 11231 are too small at these locations, efficient equalization of the air pressure in the rear chamber 116 is not possible, so the diaphragm 1121 experiences greater air resistance during vibration. Similarly, the resistance acting on the diaphragm 1121 during vibration is lower at locations near the first pressure relief opening 111c and / or the second pressure relief opening 111d in the rear chamber 116. This leads to an uneven force distribution on the diaphragm 1121 and thus to unstable vibrations of the diaphragm 1121. By adjusting the surface area of ​​the ventilation openings 11231, the low-frequency vibration of the sound-generating part 11 can therefore be stabilized.

[0099] In some embodiments, the total area of ​​the ventilation openings 11231 can influence the sound output quality of the sound-generating part 11, since the ventilation openings 11231 equalize the air pressure in the rear chamber 116 and can affect the uniformity of the air resistance acting on the diaphragm 1121 during vibration. The ratio of the total area of ​​the multiple ventilation openings 11231 to the projection area of ​​the diaphragm 1121 in the direction of vibration can influence the air resistance during the vibration of the diaphragm 1121. If the ratio of the total area of ​​the multiple ventilation openings 11231 to the projection area of ​​the diaphragm 1121 in the direction of vibration is too small, this leads to high air pressure in the rear chamber 116 and thus to high air resistance acting on the diaphragm 1121 during its vibration, thereby impairing the low-frequency output quality of the diaphragm 1121.When the ratio of the total area of ​​the multiple ventilation openings 11231 to the projection area of ​​the membrane 1121 in the direction of vibration reaches a certain threshold and is then further increased, the influence of the air in the rear chamber 116 on the vibration of the membrane 1121 decreases, but at the same time the structural strength of the support would be impaired. Therefore, in some embodiments, the ratio of the total area of ​​the multiple ventilation openings 11231 to the projection area of ​​the membrane 1121 in the direction of vibration can be in the range of 0.008 to 0.3 in order to ensure a uniform and low air resistance acting on the membrane 1121 during vibration, thus ensuring good sound output quality from the sound-generating part 11.In some embodiments, the ratio of the total area of ​​the multiple ventilation openings 11231 to the projection area of ​​the membrane 1121 in the direction of vibration can be in the range of 0.1 to 0.25 in order to further reduce the air resistance acting on the membrane 1121 during vibration. In some embodiments, the ratio of the total area of ​​the multiple ventilation openings 11231 to the projection area of ​​the membrane 1121 in the direction of vibration can be in the range of 0.11 to 0.23 in order to further reduce the air resistance acting on the membrane 1121 during vibration.

[0100] Fig. Figure 17 shows a diagram of the frequency response curves of the rear chamber as a function of different total areas of the ventilation openings according to some embodiments described in this document. The different total areas of the ventilation openings 11231 can be achieved by covering them with modeling clay. If the diaphragm of the loudspeaker 112 is positioned 4 mm directly opposite a test sound source and a voltage of 0.4 V is applied to the loudspeaker 112, the frequency response curves of the loudspeaker 112 can be determined for different ventilation opening areas (as shown in Figure 17). Fig. Figure 17 shows the test frequency range set to 20 Hz to 20,000 Hz. Here, 0 mm denotes... 2 the state in which the ventilation openings 11231 are completely covered, i.e., the support has no opening. As in Fig. As shown in Figure 17, the frequency response curve of the rear chamber 116 gradually shifts upwards in the low frequency range (e.g. 100 Hz to 1000 Hz) when the total area of ​​the ventilation openings 11231 increases from 0 mm 2 gradually to 4.54 mm 2 is increased, which corresponds to a gradually increasing low-frequency response of the rear chamber 116. If the total area of ​​the ventilation openings 11231 is 4.54 mm 2 gradually to 12.96 mm 2 When the area of ​​the ventilation openings 11231 is increased, the changes in the low-frequency response of the rear chamber 116 are not significant. This is because when the total area of ​​the ventilation openings 11231 is reduced to a certain value (e.g., 4.54 mm²), the changes in the low-frequency response of the rear chamber 116 are not significant. 2As the area of ​​the air in the rear chamber 116 is increased, the influence of the air in the rear chamber 116 on the vibration of the diaphragm 1121 gradually decreases at low frequencies. Therefore, a further increase in the total area of ​​the ventilation openings 11231 has only a minor effect on the frequency response curve of the rear chamber 116 in the low-frequency range.

[0101] As in Fig. As shown in Figure 17, the resonance peak of the rear chamber 116 gradually shifts towards higher frequencies, while the total area of ​​the ventilation openings 11231 increases from 0 mm² 2 to 12.96 mm 2 The frequency response curve in the low-frequency range (e.g., 100 Hz to 1000 Hz) becomes increasingly flat. In some embodiments, the total area of ​​the ventilation openings 11231 can be in the range of 4.54 mm². 2 up to 12.96 mm 2to ensure good low-frequency response of the rear chamber 116. In some embodiments, the total area of ​​the ventilation openings 11231 can be in the range of 5 mm. 2 up to 11 mm 2 to ensure good low-frequency response of the rear chamber 116. In some embodiments, the total area of ​​the ventilation openings 11231 can be in the range of 7 mm. 2 up to 10 mm 2 to ensure good low-frequency response of the rear chamber 116. In some embodiments, the total area of ​​the ventilation openings 11231 can be in the range of 8 mm. 2 up to 10 mm 2 to ensure a good low-frequency response of the posterior chamber 116.

[0102] In some embodiments, several ventilation openings 11231 can be formed in the support 1123 to increase structural strength, with the connecting sections between the multiple ventilation openings 11231 forming reinforcing ribs. In some embodiments, the number of ventilation openings 11231 can be reduced to one to simplify the drilling process, provided that the total area of ​​the ventilation openings 11231 meets the requirements.

[0103] In some embodiments, several ventilation openings can also be formed in the base 11253a or the side wall 11253b of the receiving element 11253 of the magnetic circuit arrangement 1125. The sound from the rear of the diaphragm 1121 can be transmitted via the several ventilation openings to the rear chamber 116 and to the pressure relief opening, whereby the ventilation openings provide channels for effective sound radiation on both sides of the diaphragm 1121.

[0104] In some embodiments, the projection area of ​​the diaphragm 1121 in the direction of vibration influences the amount of air moved by the diaphragm 1121 during vibration, which in turn affects the efficiency of sound generation by the diaphragm 1121 and the acoustic output effect of the sound-generating part 11. If the projection area of ​​the diaphragm 1121 in the direction of vibration is too small, a small amount of air is moved by the diaphragm 1121, resulting in a poor acoustic output effect of the sound-generating part 11. If the projection area of ​​the diaphragm 1121 in the direction of vibration is too large, excessive dimensions of the support 1123 result, increasing the weight of the support 1123. This leads to a higher weight of the sound-generating part 11, which affects the structure and weight of the sound-generating part 11, as well as its comfort and stability.Taking into account the two wearing scenarios - at least partial coverage of the antihelix area by the sound-generating part 11 (as in . Fig. 3 shown) and partial or complete protrusion of the sound-producing part 11 into the cavum conchae (as in Fig. (4 shown) - the volume audible to the ear can be increased (which corresponds to a higher sound generation power). Therefore, the size of the diaphragm 1121 does not need to be excessively large. In some embodiments, the sound outlet opening 111a is positioned on the side wall of the housing 111 of the sound generation part 11 that is closest to the user's ear, and the sound outlet opening 111a is formed in front of the diaphragm 1121 and communicates with the front chamber 114. The direction of vibration of the diaphragm 1121 is the same as or approximately the same as the thickness direction X of the sound generation part 11. The projection area of ​​the diaphragm 1121 in the direction of vibration is the same as or approximately the same as the projection area of ​​the diaphragm 1121 onto the sagittal plane. The projection area of ​​the diaphragm 1121 in the direction of vibration can influence the projection area of ​​the sound generation part 11 onto the sagittal plane of the user.The overlap ratio between the projection surface of the sound-generating part 11 onto the sagittal plane of the user and the projection surface of the cavum conchae onto the sagittal plane can influence the chamber-like structure formed by the projection of the sound-generating part 11 into the cavum conchae, and thus the acoustic output effect of the sound-generating part 11. Furthermore, it is intended that the long-axis and short-axis dimensions of the diaphragm 1121 can influence the long-axis and short-axis dimensions, respectively, of the projection of the sound-generating part 11 onto the sagittal plane.

[0105] In some embodiments, taking both cases into full consideration, at least partial coverage of the antihelix region by the sound-generating part 11 (as in Fig. 3 shown) and partial or complete protrusion of the sound-producing part 11 into the cavum conchae (as in Fig. 4 shown) - the projection area of ​​the membrane 1121 in the direction of vibration in the range of 90 mm 2 up to 560 mm 2 The dimensions of the sound-generating element 11 must be such that they are positioned to ensure good acoustic output while simultaneously providing a suitable projection area of ​​the sound-generating element 11 onto the sagittal plane or an appropriate thickness of the sound-generating element 11. Preferably, the projection area of ​​the membrane 1121 in the direction of vibration is in the range of 120 mm. 2 up to 300 mm 2 Preferably, the projection area of ​​the membrane 1121 can be in the direction of vibration in the range of 150 mm. 2 up to 200 mm 2 lay.

[0106] Taking into full consideration both cases – at least partial coverage of the antihelix region by the sound-generating part 11 (as in Fig. 3 shown) and partial or complete protrusion of the sound-producing part 11 into the cavum conchae (as in Fig. 4 shown) - in some embodiments, the ratio of the projection area of ​​the membrane 1121 in the direction of vibration of the membrane (i.e., the projection area of ​​the membrane 1121 onto the sagittal plane) to the projection area of ​​the housing 111 in the direction of vibration of the membrane (i.e., the projection area of ​​the housing 111 onto the sagittal plane) may not be less than 0.5 in order to achieve the largest possible area of ​​the membrane 1121 with limited dimensions of the sound-generating part 11 and thus increase the acoustic output quality of the sound-generating part 11 when the direction of vibration of the membrane 1121 is parallel to the thickness direction X of the sound-generating part 11.In some embodiments, the ratio of the projection area of ​​the diaphragm 1121 in the direction of vibration of the diaphragm to the projection area of ​​the housing 111 in the direction of vibration of the diaphragm can be at least 0.8 in order to further maximize the area of ​​the diaphragm 1121 with limited dimensions of the sound-generating part 11 and thus improve the acoustic output quality of the sound-generating part 11. In some embodiments, the ratio of the projection area of ​​the diaphragm 1121 in the direction of vibration of the diaphragm to the projection area of ​​the housing 111 in the direction of vibration of the diaphragm can be in the range of 0.8 to 0.95 in order to further maximize the area of ​​the diaphragm 1121 and thus improve the acoustic output quality of the sound-generating part 11.

[0107] In some embodiments, based on the in Fig. In the manner shown in Figure 3, where the antihelix region is at least partially covered by the sound-generating part 11, the dimension of the long axis of the diaphragm 1121 can range from 13 mm to 25 mm, while the dimension of the short axis of the diaphragm can range from 4 mm to 13 mm. Referring to the Fig. In the depicted configuration of the sound-generating element 11, which is partially or completely projected into the cavity, the dimension of the short axis of the diaphragm 1121 can range from 4 mm to 13 mm to facilitate the formation of an effective chamber-like structure. Based on this dimension of the short axis and considering the projection area of ​​the diaphragm 1121 (e.g., with a projection area of ​​52 mm²), 2 up to 325 mm 2(in the direction of vibration) the dimension of the long axis of the diaphragm 1121 can be further specified in the range of 13 mm to 25 mm. For example, the dimension of the long axis of the diaphragm 1121 can be in the range of 15 mm to 20 mm and the dimension of the short axis of the diaphragm in the range of 5 mm to 10 mm. As another example, the dimension of the long axis of the diaphragm 1121 can be in the range of 17 mm to 18 mm and the dimension of the short axis of the diaphragm in the range of 7 mm to 8 mm.

[0108] 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.

[0109] The present application also uses specific terms to describe embodiments of the present application. The terms "an embodiment" and / or "some embodiments" refer to a feature, structure, or special characteristic associated with at least one embodiment of the present application. It should therefore be emphasized and noted that the terms "an embodiment" or "an alternative embodiment," which have been mentioned two or more times in different places in the present description, do not necessarily refer to the same embodiment. Furthermore, some features, structures, or properties of one or more embodiments of the present application can be appropriately combined with one another.

[0110] Furthermore, a person skilled in the art in this field can understand that the aspects of the present application can be explained and described by several patentable categories or situations, including any new and meaningful combinations of operations, machines, products, or substances, as well as any new and meaningful improvements thereto. Accordingly, the various aspects of the present application can be implemented entirely by hardware, entirely by software (including firmware, resident software, microcode, etc.), or by a combination of hardware and software. Both hardware and software can be referred to as a "data block," "module," "engine," "unit," "component," or "system." Furthermore, the aspects of the present application can manifest themselves as a computer product on one or more computer-readable media, the product comprising computer-readable program code.

[0111] A computer-readable storage medium can comprise a disseminated data signal containing computer program code, for example, on a baseband or as part of a carrier wave. This disseminated signal can be in various forms, including electromagnetic, optical, or a suitable combination thereof. A computer-readable storage medium can be any medium that is not strictly a computer-readable storage medium and serves to achieve communication, dissemination, or transmission of a program to be provided by connecting it to an instruction execution system, associated device, or equipment. The program code on a computer-readable storage medium can be disseminated via any suitable medium, such as radio, cable, fiber optic cable, RF, or similar media, or a combination thereof.

[0112] The computer program code required for the actions of various parts of this application may be written in one or more programming languages, including object-oriented programming languages ​​such as Java, Scala, Smalltalk, Eiffel, JADE, Emerald, C++, C#, VB.NET, Python, etc.; common procedural programming languages ​​such as C, Visual Basic, Fortran 2003, Perl, COBOL 2002, PHP, ABAP; dynamic programming languages ​​such as Python, Ruby, and Groovy; or other programming languages. The program code may be executed entirely on the user's computer, as an independent software package on the user's computer, partly on the user's computer and partly on a remote computer, or entirely on a remote computer or processing device.In the latter case, the remote computer can be connected to the user's computer via a network of any kind, such as a Local Area Network (LAN) or Wide Area Network (WAN), or (e.g., via the Internet) connected to an external computer, or in a cloud computing environment, or as a service such as Software-as-a-Service (SaaS).

[0113] Furthermore, unless expressly stated otherwise in the claims, neither the order of the processing elements and sequences nor the use of numbers, letters, or other designations in the present application shall be intended to restrict the order of the processes and methods of the present application. Although the above disclosure has discussed some embodiments of the invention currently considered useful by way of various examples, it should be understood that such details are for illustrative purposes only and that the attached claims are not limited to the disclosed embodiments. Rather, the claims are intended to cover all modifications and equivalent combinations that are consistent with the nature and scope of the embodiments of the present application.For example, although the system components described above can be implemented by hardware devices, they can also be implemented by purely software solutions, such as installing the described system on existing processing equipment or mobile devices.

[0114] It should also be noted that in the preceding description of the embodiments of the present application, various features are sometimes grouped together in one embodiment, one figure, or its description(s) to simplify the description of the disclosure of the present application and to facilitate the understanding of one or more embodiments of the invention. However, this method of disclosure does not mean that the subject matter of the present application requires more features than those specified in the claims. In fact, the embodiments have fewer features than the totality of features of the individual embodiments disclosed above.

[0115] In some embodiments, numerical values ​​are used to describe the components and properties. It should be understood that in some cases, the numerical values ​​used to describe the embodiments are further specified by terms such as "approximately," "about," or "essentially." Unless otherwise stated, "approximately," "about," or "essentially" indicate that the stated number allows for a variation of ±20%. Accordingly, in some embodiments, the numerical parameters used in the description and claims are approximate values ​​that may vary depending on the requirements of the individual embodiment. In some embodiments, the required number of valid decimal places for the numerical parameters is to be taken into account using a general rounding procedure.Although the numerical ranges and parameters in some embodiments of the present application for determining the width of the associated perimeter are approximate values, such values ​​have been determined as precisely as possible within the practical scope in the specific embodiments.

[0116] Every patent specification, every patent application, every publication of patent applications, and every other material cited in the present application, such as articles, books, descriptions, publications, documents, etc., is hereby incorporated in its entirety into the present application as a reference. Excluded are application history documents that are inconsistent with or conflict with the content of the present application, as well as documents (currently or subsequently attached to the present application) that limit the broadest scope of the claims of the present application. It is hereby clarified that in the event of any discrepancies or conflicts between the description, definition, and / or use of terms in the application and those in accompanying materials, the description, definition, and / or use of terms in the present application shall prevail.

[0117] In conclusion, it should be understood that the embodiments described in this application serve only to illustrate the principle of the embodiments described therein. Other variants could also fall within the scope of this application. Therefore, alternative configurations of the embodiments described in this application may be considered exemplary and not as limiting, as being consistent with the teachings of this application. Accordingly, the embodiments described in this application are not limited to those expressly presented and described herein. 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] PCT / CN2022144339

[0001]

Claims

[1] Sound-generating part comprising: a membrane; a magnetic circuit arrangement; and a coil connected to the diaphragm and located at least partially within a magnetic gap formed by the magnetic circuit arrangement, wherein the coil, when energized, causes the diaphragm to vibrate in order to produce sound, wherein the diaphragm comprises a main area and a surround area surrounding the main area, wherein the main area comprises a first inclined segment and a first connecting segment connected to the coil, wherein the first inclined segment abuts a portion of the surround area and the first inclined segment is inclined away from the coil relative to the first connecting segment, the inclination angle of the first inclined segment relative to the first connecting segment being in the range of 5° to 30°, wherein the first connecting segment is perpendicular to the direction of vibration of the diaphragm. [2] Sound generating part according to claim 1, characterized by , that the bead area includes a second inclined segment which at least partially abuts the first inclined segment, and wherein the second inclined segment is located on a side of the first inclined segment facing away from the coil. [3] Sound generating part according to claim 2, characterized by that the minimum distance between the coil and the first inclined segment is not less than 0.3 mm. [4] Sound generating part according to claim 1, characterized by , that the corrugated area comprises an arc-shaped segment, with the ratio of the height to the span of the arc-shaped segment being in the range of 0.35 to 0.

4. [5] Sound generating part according to claim 4, characterized by , that the height of the arc-shaped segment is in the range of 0.5 mm to 0.7 mm and the span of the arc-shaped segment is in the range of 1.2 mm to 1.7 mm. [6] Sound generating part according to claim 1, characterized by , that the main area comprises a dome located at an end of the first connecting segment far from the first inclined segment, the span of the dome being in the range of 2 mm to 8 mm and the height of the dome being in the range of 0.7 mm to 1.2 mm. [7] Sound generating part according to claim 6, characterized by , that the ratio of the height to the span of the dome is in the range of 0.1 to 0.

3. [8] Sound generating part according to one of claims 1-7, characterized by , that when worn, the sound-generating part protrudes wholly or partially into the cavum conchae of the ear, forming a chamber-like structure, wherein the chamber-like structure is a partially closed structure that is jointly enclosed by a side wall of the sound-generating part and the structure of the cavum conchae. [9] Sound generating part according to claim 8, characterized by, that the area of ​​the projection of the membrane in the direction of its vibration is in the range of 52 mm 2 up to 325 mm 2 The dimension of the short axis of the membrane is in the range of 5 mm to 10 mm and the dimension of the long axis of the membrane is in the range of 15 mm to 20 mm. [10] Sound generating part according to any one of claims 1-9, characterized by , that the sound-generating part further comprises a carrier surrounding the magnetic circuit arrangement, wherein the first part of the carrier is connected to a second connecting segment of the bead area located further away from the main area. [11] Sound generating part according to one of claims 1-10, characterized by, that the thickness of the first part is in the range of 0.3 mm to 3 mm and the thickness of the first part is defined as the minimum distance between the connection area of ​​the carrier with the bead area and an area of ​​the carrier directly adjacent to the magnetic circuit assembly in the direction of vibration of the membrane. [12] Sound generating part according to claim 10 or 11, characterized by, that the sound-generating part further comprises a housing provided with a pressure relief opening, wherein the carrier is equipped with several ventilation openings through which the sound is transmitted from the rear of the diaphragm to the pressure relief opening, wherein the several ventilation openings comprise at least a first ventilation opening and a second ventilation opening, wherein the distance between the center of the first ventilation opening and the center of the pressure relief opening is greater than the distance between the center of the second ventilation opening and the center of the pressure relief opening, and wherein the area of ​​the first ventilation opening is larger than the area of ​​the second ventilation opening. [13] Sound generating part according to claim 12, characterized by , that in the direction of vibration of the membrane the projection area of ​​the membrane is in the range of 90 mm 2 up to 560 mm 2lies and the total area of ​​the multiple ventilation openings is in the range of 4.54 mm 2 up to 12.96 mm 2 lies. [14] Sound generating part according to claim 10 or 11, characterized by that several ventilation openings are provided in a bottom wall of the receiving element of the magnetic circuit arrangement or in a side wall of the same adjacent to the carrier. [15] Sound generating part according to claim 1, characterized by , that the magnetic circuit arrangement comprises a magnetically conductive plate and a magnet, wherein the magnetically conductive plate is located between the magnet and the diaphragm and adheres to the surface of the magnet, and wherein, in the direction of vibration of the diaphragm, the distance between the center of the coil and the center of the magnetically conductive plate is less than 0.3 mm. [16] Sound generating part according to claim 15, characterized by, that in the direction of vibration of the membrane the distance from the lowest point of the dome to the upper surface of the magnetically conductive plate is greater than 0.8 mm.

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