Earphones

Abstract

An embodiment of the present specification provides an earphone including a sound generating unit, an ear hook, and a microphone assembly, the ear hook being configured to mount the sound generating unit in a position near the ear canal so as not to block the ear canal opening, such that at least a portion of the sound generating unit is inserted into the cavity of the concha, the microphone assembly including at least a first microphone and a second microphone, the first microphone or the second microphone being provided in the sound generating unit or the ear hook, and the sound generating unit or the ear hook being provided with a first microphone, A first sound collection hole and a second sound collection hole corresponding to a first microphone and a second microphone are formed, an extension of a line connecting a projection of the first sound collection hole onto the user's sagittal plane and a projection of the second sound collection hole onto the sagittal plane has an intersection with a projection of the antihelix onto the sagittal plane, a distance between the projection of the first sound collection hole onto the sagittal plane and the projection of the second sound collection hole onto the sagittal plane is a first distance, a distance between the projection of the second sound collection hole onto the sagittal plane and the intersection is a second distance, and a ratio of the first distance to the second distance is 1.8 to 4.4.

Description

[Technical field]

[0001] This application relates to the technical field of acoustics, and in particular to earphones.

[0002] This application claims priority to a Chinese patent application with application number 202211336918.4 filed on October 28, 2022, a Chinese patent application with application number 202223239628.6 filed on December 1, 2022, and a PCT application with application number PCT / CN2022 / 144339 filed on December 30, 2022, the entire contents of which are incorporated herein by reference. [Background technology]

[0003] 2. Description of the Related Art With the development of audio output technology, audio devices (e.g., earphones) are widely applied in people's daily lives, and by using them together with electronic devices such as mobile phones and computers, users can enjoy a feast of hearing. Summary of the Invention [Problem to be solved by the invention]

[0004] Usually, a microphone is arranged in the earphone to pick up the user's voice. The sound pickup effect of the microphone depends on the arrangement of the earphone. It is a problem to be solved to improve the sound pickup effect of the microphone while ensuring the sound output effect of the earphone. [Means for solving the problem]

[0005] An earphone according to one embodiment of the present specification includes a sound generating unit, an ear hook configured to attach the sound generating unit at a position near the ear canal so as not to block the ear canal opening so that at least a part of the sound generating unit is inserted into the cavity of the concha, and at least a first microphone and a second microphone, the first microphone or the second microphone is provided in the sound generating unit or the ear hook, and a first microphone corresponding to the first microphone and the second microphone is provided in the sound generating unit or the ear hook, a microphone assembly in which a sound collection hole and a second sound collection hole are formed, wherein an extension of a line connecting a projection of the first sound collection hole onto a user's sagittal plane and a projection of the second sound collection hole onto the sagittal plane has an intersection with a projection of an antihelix onto the sagittal plane, a distance between the projection of the first sound collection hole onto the sagittal plane and a projection of the second sound collection hole onto the sagittal plane is a first distance, a distance between the projection of the second sound collection hole onto the sagittal plane and the intersection is a second distance, and a ratio of the first distance to the second distance is 1.8 to 4.4.

[0006] An earphone according to one embodiment of the present specification includes a sound generating unit, an ear hook configured to attach the sound generating unit to a position near the ear canal without blocking the ear canal opening so that at least a part of the sound generating unit covers an antihelix region, and at least a first microphone and a second microphone, the first microphone or the second microphone is provided in the sound generating unit or the ear hook, and a first sound collecting device corresponding to the first microphone and the second microphone is provided in the sound generating unit or the ear hook, a microphone assembly in which a first sound collection hole and a second sound collection hole are formed, wherein an extension of a line connecting a projection of the first sound collection hole onto a sagittal plane of a user and a projection of the second sound collection hole onto the sagittal plane has an intersection with a projection of an inner contour of the auricle onto the sagittal plane, a distance between the projection of the first sound collection hole onto the sagittal plane and the projection of the second sound collection hole onto the sagittal plane is a first distance, a distance between the projection of the second sound collection hole onto the sagittal plane and the intersection is a second distance, and a ratio of the first distance to the second distance is 1.8 to 4.4.

[0007] The present application will be further illustrated by exemplary embodiments, which are not limiting and will be described in detail with reference to the drawings, in which like reference numerals indicate like structures. [Brief description of the drawings]

[0008] [Figure 1] 1 is a schematic diagram of an exemplary ear in accordance with some embodiments of the present disclosure. [Diagram 2] FIG. 1 is an exemplary schematic diagram of an earphone according to some embodiments of the present disclosure; [Diagram 3] 1 is a schematic diagram showing how an earphone according to some embodiments of the present specification is worn when a sound generating unit of the earphone is inserted into the cavity of the concha. [Figure 4] FIG. 2 is a schematic diagram of an acoustic model of a similar cavity structure in accordance with certain embodiments of the present disclosure. [Diagram 5] FIG. 1 is an exemplary schematic diagram of an earphone according to some embodiments of the present specification. [Figure 6] FIG. 1 is an exemplary schematic diagram of an earphone according to some embodiments of the present disclosure; [Figure 7] FIG. 13 is an exemplary schematic diagram of an earphone according to some other embodiments of the present disclosure. [Figure 8] 1 is a schematic diagram of a coordinate system established based on major and minor axis directions of an audio generating unit, according to some embodiments of the present disclosure. [Figure 9] 4A-4C are schematic diagrams of sound collection curves when the sound collection holes are located at different positions, according to some embodiments herein. [Figure 10] 11A-11C are schematic diagrams of sound collection curves when the sound collection holes are located at different positions according to some other embodiments of the present disclosure. [Figure 11] 11A-11C are schematic diagrams of sound collection curves when the sound collection holes are located at different positions according to some other embodiments of the present disclosure. [Figure 12] 11A-11C are schematic diagrams of sound collection curves when the sound collection holes are located at different positions according to some other embodiments of the present disclosure. [Figure 13]11A-11C are schematic diagrams of sound collection curves when the sound collection holes are located at different positions according to some other embodiments of the present disclosure. [Figure 14] 11A-11C are schematic diagrams of sound collection curves when the sound collection holes are located at different positions according to some other embodiments of the present disclosure. [Figure 15A] FIG. 13 is an exemplary schematic diagram of an earphone according to some other embodiments of the present specification. [Figure 15B] FIG. 13 is an exemplary schematic diagram of an earphone according to some other embodiments of the present specification. [Figure 16A] 11 is a schematic diagram of an example coordinate system established based on an audio generating unit, according to some other embodiments of the present disclosure. [Figure 16B] 11 is a schematic diagram of an example coordinate system established based on an audio generating unit, according to some other embodiments of the present disclosure. [Figure 17] 1 is a schematic diagram of an example positional relationship between a first sound collection hole, a second sound collection hole, and a user's mouth, according to some embodiments of the present disclosure. [Figure 18] FIG. 13 is an exemplary schematic diagram of an earphone according to some other embodiments of the present disclosure. [Figure 19] FIG. 13 is an exemplary schematic diagram of an earphone according to some other embodiments of the present disclosure. [Figure 20] FIG. 13 is an exemplary schematic diagram of an earphone according to some other embodiments of the present disclosure. [Figure 21A] FIG. 13 is an exemplary schematic diagram of an earphone according to some other embodiments of the present disclosure. [Figure 21B] 4 is a schematic diagram of an included angle between a line connecting a first sound collection hole and a second sound collection hole and an outer surface of a sound generating unit according to some embodiments of the present disclosure; FIG. [Figure 22] FIG. 13 is an exemplary schematic diagram of an earphone according to some other embodiments of the present specification. [Diagram 23] FIG. 13 is a schematic cross-sectional view of an exemplary configuration of a sound generating section of an earphone according to some other embodiments of the present specification. [Figure 24]FIG. 13 is an exemplary schematic diagram of an earphone according to some other embodiments of the present disclosure. [Figure 25A] FIG. 13 is a schematic diagram of a corresponding frequency response curve when the distance between the second projection point O and the intersection point C is 8 mm, according to some embodiments of the present disclosure. [Figure 25B] FIG. 13 is a schematic diagram of a corresponding frequency response curve when the distance between the second projection point O and the intersection point C is 6 mm, according to some embodiments of the present disclosure. [Figure 25C] FIG. 13 is a schematic diagram of a corresponding frequency response curve when the distance between the second projection point O and the intersection point C is 4 mm, according to some embodiments of the present disclosure. [Figure 25D] FIG. 13 is a schematic diagram of a corresponding frequency response curve when the distance between the second projection point O and the intersection point C is 2 mm, according to some embodiments of the present disclosure. [Figure 26] FIG. 13 is an exemplary schematic diagram of an earphone according to some other embodiments of the present disclosure. [Figure 27] FIG. 13 is an exemplary schematic diagram of an earphone according to some other embodiments of the present disclosure. [Figure 28A] FIG. 13 is an exemplary schematic diagram of an earphone according to some other embodiments of the present disclosure. [Figure 28B] 4 is a schematic diagram of an included angle between a line connecting a first sound collection hole and a second sound collection hole and an outer surface of a sound generating unit according to some embodiments of the present disclosure; FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] In order to more clearly describe the technical means of the embodiments of the present application, the drawings necessary for the description of the embodiments will be briefly described below. Obviously, the drawings described below are only some examples or embodiments of the present application, and those skilled in the art can apply the present application to other similar scenes based on these drawings without creative efforts. Unless otherwise clear from the language environment or described otherwise, the same numbers in the drawings indicate the same structures or operations.

[0010] FIG. 1 is a schematic diagram of an exemplary ear according to some embodiments of the present disclosure. As shown in FIG. 1, the ear 100 may include an external auditory canal 101, a concha cavity 102, a concha navicular 103, a triangular fossa 104, an antihelix 105, a scapha 106, a helix 107, an earlobe 108, a crus of the helix 109, an outer contour 1013, and an inner contour 1014. For convenience of explanation, the superior crus of the antihelix 1011, the inferior crus of the antihelix 1012, and the antihelix 105 are collectively referred to as an antihelix region in the embodiments of the present disclosure. In some embodiments, the stability of the fitting of the audio device can be achieved by supporting the audio device at one or more parts of the ear 100. In some embodiments, parts such as the external auditory canal 101, the concha cavity 102, the concha navicular 103, and the triangular fossa 104 have a certain depth and volume in a three-dimensional space, and can achieve the fitting needs of the audio device. For example, an acoustic device (e.g., a canal-type earphone) may be fitted in the ear canal 101. In some embodiments, the fitting of the acoustic device can be achieved by a portion other than the ear canal 101 of the ear 100. For example, the fitting of the acoustic device can be achieved by a portion such as the concha scapha 103, the triangular fossa 104, the antihelix 105, the scaphoid fossa 106, the helix 107, or a combination thereof. In some embodiments, in order to improve the comfort and reliability of the fitting of the acoustic device, the fitting can be achieved by a portion such as the user's earlobe 108. By fitting the acoustic device and transmitting sound by a portion other than the ear canal 101 of the ear 100, the user's ear canal 101 can be "opened". When the user is wearing the acoustic device (earphone), the acoustic device does not block the user's ear canal 101, and the user can receive not only sound from the acoustic device but also sound from the environment (e.g., horn sounds, bicycle bell sounds, voices of people around, traffic control voices, etc.), thereby reducing the probability of traffic accidents. In some embodiments, depending on the structure of the ear 100, the acoustic device may be designed with a structure that matches the ear 100, allowing the sound generating portion of the acoustic device to be placed at different positions on the ear.For example, when the acoustic device is an earphone, the earphone may include a suspension structure (e.g., an ear hook) and a sound-generating unit, and the sound-generating unit and the suspension structure may be physically connected, and the suspension structure may conform to the shape of the pinna of the ear so as to place the entire or a part of the structure of the sound-generating unit in front of the crus helix 109 (e.g., the area J surrounded by the dotted line in FIG. 1). Also, for example, when a user wears the earphone, the entire or a part of the structure of the sound-generating unit may contact the upper part of the ear canal 101 (e.g., a position where one or more parts such as the crus helix 109, the concha navicular 103, the triangular fossa 104, the antihelix 105, the scaphoid fossa 106, and the helix 107 are located). Also, for example, when a user is wearing earphones, the entire or partial structure of the sound generating unit may be located within a cavity formed by one or more parts of the ear (e.g., the concha cavity 102, the concha scapha 103, the triangular fossa 104, etc.) (e.g., region M1 including at least the concha cavity 103 and the triangular fossa 104, and region M2 including at least the concha cavity 102, surrounded by dotted lines in Figure 1).

[0011] Since there may be individual differences among different users, ears have different shapes, sizes, and other dimensional differences. For ease of explanation and understanding, unless otherwise specified, this specification mainly uses an ear model having a "standard" shape and size as a reference to further describe the manner of fitting the acoustic device to the ear model in different embodiments. For example, a simulator including a head and its (left and right) ears manufactured according to the ANSI: S3.36, S3.25 and IEC: 60318-7 standards, such as GRAS KEMAR, HEAD Acoustics, B&K 4128 series, or B&K 5128 series, can be used as a reference for fitting the acoustic device, thereby showing the scene in which most users normally wear the acoustic device. Taking GRAS KEMAR as an example, the ear simulator may be any of GRAS 45AC, GRAS 45BC, GRAS 45CC, or GRAS 43AG, etc. Taking HEAD Acoustics as an example, the ear simulator may be any of HMS II.3, HMS II.3 LN, HMS II.3LN HEC, etc. In the examples of the present specification, the measured data range is measured based on GRAS 45BC KEMAR, but it should be understood that there may be differences between different head and ear models, and in other models, there may be a variation of ±10% in the relevant data range. By way of example only, the reference ear may be characterized in that the vertical axis dimension of the projection of the pinna onto the sagittal plane is within the range of 55-65 mm, and the sagittal axis dimension of the projection of the pinna onto the sagittal plane is within the range of 45-55 mm. The projection of the pinna onto the sagittal plane is the projection of the edge of the pinna onto the sagittal plane. The edge of the pinna consists of at least the outer contour of the helix, the contour of the earlobe, the contour of the tragus, the intertragal notch, the antitragus, the posterior auricular groove, etc. Therefore, the descriptions in this application of "worn by a user," "in a worn state," and "in a worn state" may refer to the acoustic device described in this application being worn on the ears of the simulator.Naturally, taking into account the existence of individual differences among different users, the structure, shape, size, thickness, etc. of one or more parts of the ear 100 can be differentially designed to suit ears of different shapes and sizes, and these differential designs can be expressed by having different ranges of numerical values ​​for the characteristic parameters of one or more parts of the audio device (e.g., the sound generating unit, ear hook, etc. described below) to adapt to different ears.

[0012] In addition, in the fields of medicine, anatomy, and the like, three basic cutting planes of the human body, the sagittal plane, the coronal plane, and the horizontal plane, and three basic axes, the sagittal axis, the coronal axis, and the vertical axis, can be defined. The sagittal plane is a cutting plane perpendicular to the ground along the front-back direction of the body, dividing the human body into two parts, the left and right, the coronal plane is a cutting plane perpendicular to the ground along the left-right direction of the body, dividing the human body into two parts, the front and the back, and the horizontal plane is a cutting plane parallel to the ground along the up-down direction perpendicular to the body, dividing the human body into two parts, the top and the bottom. Accordingly, the sagittal axis is an axis perpendicular to the coronal plane along the front-back direction of the body, the coronal axis is an axis perpendicular to the sagittal plane along the left-right direction of the body, and the vertical axis is an axis perpendicular to the horizontal plane along the up-down direction of the body. Furthermore, the anterior side of the ear as referred to in this application is the side of the ear along the sagittal axis, facing the face region of the human body. Looking at the ear of the simulator from the direction in which the coronal axis of the human body is located, a schematic diagram of the anterior contour of the ear is obtained as shown in FIG.

[0013] The above description of the ear 100 is for illustrative purposes only and is not intended to limit the scope of the present application. Those skilled in the art can make various changes and modifications based on the description of the present application. For example, some structures of the acoustic device may block part or all of the ear canal 101. These changes and modifications are still within the protection scope of the present application.

[0014] FIG. 2 is an exemplary schematic diagram of an earphone according to some embodiments of the present specification. As shown in FIG. 2, the earphone 10 may include a sound generating unit 11 and a hanging structure 12. In some embodiments, the earphone 10 may attach the sound generating unit 11 to a user's body (e.g., the head, neck, or upper torso of a human body) by the hanging structure 12. In some embodiments, the hanging structure 12 may be an ear hook, the sound generating unit 11 is connected to one end of the ear hook, and the ear hook may be set to a shape that fits the user's ear. For example, the ear hook may be an arc-shaped structure. In some embodiments, the hanging structure 12 may be a clamping structure that fits the user's auricle so as to be clamped by the user's auricle. In some embodiments, the hanging structure 12 may include, but is not limited to, an ear hook, an elastic band, etc., which can better hang the earphone 10 on the user and prevent it from falling off during use by the user.

[0015] In some embodiments, the sound generating unit 11 may be attached to the user's body, and a speaker may be provided in the sound generating unit 11 to generate sound and input it to the user's ear 100. In some embodiments, the earphone 10 may be combined with a product such as glasses, headphones, a head-mounted display, or an AR / VR helmet, and in this case, the sound generating unit 11 may be attached near the user's ear 100 in a hanging or clamping manner. In some embodiments, the sound generating unit 11 may be in a ring shape, an ellipse shape, a (regular or irregular) polygonal shape, a U-shape, a V-shape, a semicircle shape, or the like so that it can be directly hung on the user's ear 100.

[0016] As shown in FIG. 1 and FIG. 2, in some embodiments, when a user wears the earphone 10, at least a part of the sound generating unit 11 may be located in the region J on the anterior side of the tragus of the user's ear 100 or the anterior lateral surface region M1 and region M2 of the auricle as shown in FIG. 1. Different wearing positions (11A, 11B, and 11C) of the sound generating unit 11 are exemplarily described below. Note that the anterior lateral surface of the auricle referred to in the embodiments of this specification is the side facing away from the head along the coronal axis direction of the auricle, and correspondingly, the posterior medial surface of the auricle is the side facing the human head along the coronal axis direction of the auricle. In some embodiments, the sound generating unit 11A is located on the side facing the human face region along the sagittal axis direction of the user's ear 100, i.e., the sound generating unit 11A is located in the human face region J in front of the ear 100. Furthermore, a speaker may be provided in the housing of the sound generating unit 11A, and the housing of the sound generating unit 11A may be provided with at least one sound output hole (not shown in FIG. 2), and the sound output hole may be located in a side wall of the housing of the sound generating unit facing or close to the user's ear canal 101, and the speaker can output sound to the user's ear canal 101 through the sound output hole. In some embodiments, the speaker may include a diaphragm, and a cavity in the housing of the sound generating unit 11 is partitioned by the diaphragm into at least a front cavity and a rear cavity, and the sound output hole is acoustically coupled to the front cavity, and the vibration of the diaphragm causes the air in the front cavity to vibrate and generate air-conducted sound, and the air-conducted sound generated in the front cavity is transmitted to the outside through the sound output hole. In some embodiments, the housing of the sound generating unit 11 may further include one or more decompression holes, which may be located in a side wall of the housing adjacent to or opposite the side wall in which the sound emission hole is located, and the decompression holes are acoustically coupled to the rear cavity, so that the vibration of the diaphragm causes the air in the rear cavity to vibrate, generating air-conducted sound, and the air-conducted sound generated in the rear cavity is transmitted to the outside via the decompression holes.For example, in some embodiments, the speaker in the sound generating unit 11A can output sounds having a phase difference (e.g., opposite phases) through the sound output hole and the decompression hole, the sound output hole may be located on a side wall of the housing of the sound generating unit 11A facing the user's ear canal 101, and the decompression hole may be located on a side of the housing of the sound generating unit 11 facing away from the user's ear canal 101, in which case the housing serves as a baffle to increase the difference in acoustic distance from the sound output hole and the decompression hole to the ear canal 101, thereby increasing the intensity of the sound in the ear canal 101 and reducing the volume of sound leakage in the far field. In some embodiments, the sound generating unit 11 may have a long axis direction X and a short axis direction Y that are perpendicular to the thickness direction Z and perpendicular to each other. The long axis direction X may be defined as the direction in which the extension dimension is the largest in the shape of a two-dimensional projection surface of the sound generating unit 11 (for example, the projection of the sound generating unit 11 onto a plane on which its outer surface is located, or the projection onto a sagittal plane) (for example, when the projection shape is rectangular or approximately rectangular, the long axis direction is the length direction of the rectangle or approximately rectangle), and the short axis direction Y may be defined as the direction perpendicular to the long axis direction X in the projection shape of the sound generating unit 11 onto the sagittal plane (for example, when the projection shape is rectangular or approximately rectangular, the short axis direction is the width direction of the rectangle or approximately rectangle). The thickness direction Z may be defined as the direction perpendicular to the two-dimensional projection surface, and for example, coincides with the direction of the coronal axis, both of which face the left-right direction of the body. In some embodiments, when the sound generating unit 11 is inclined in the worn state, the long axis direction X and the short axis direction Y are still parallel or approximately parallel to the sagittal plane, the long axis direction X may have a certain angle with the direction of the sagittal axis, i.e., the long axis direction X is also inclined accordingly, and the short axis direction Y may have a certain angle with the direction of the vertical axis, i.e., the short axis direction Y is also inclined, which is the wearing state of the sound generating unit 11B as shown in FIG. 2. In some embodiments, the whole or part of the structure of the sound generating unit 11B may be inserted into the cavity of the concha, i.e., the projection of the sound generating unit 11B onto the sagittal plane and the projection of the cavity of the concha onto the sagittal plane have an overlapping portion. For specific details of the sound generating unit 11B, reference may be made to other parts of this specification, for example, FIG. 3 and the corresponding contents of the specification.In some embodiments, the voice generating unit 11 may be in a horizontal state or a nearly horizontal state when worn, and as shown in the voice generating unit 11C in FIG. 2, the long axis direction X may coincide or nearly coincide with the direction of the sagittal axis, both of which face the front-back direction of the body, and the short axis direction Y may coincide or nearly coincide with the direction of the vertical axis, both of which face the up-down direction of the body. Note that when worn, the voice generating unit 11C being in a nearly horizontal state may mean that the included angle between the long axis direction X and the sagittal axis of the voice generating unit 11C shown in FIG. 2 is within a specific range (for example, 20° or less). Note that the wearing position of the voice generating unit 11 is not limited to the voice generating unit 11A, the voice generating unit 11B, and the voice generating unit 11C shown in FIG. 2, and may be any position as long as it satisfies the region J, the region M1, or the region M2 shown in FIG. 1. For example, the entire or part of the structure of the voice generating unit 11 may be located in the region J surrounded by the dotted line in FIG. 1. Also, for example, the whole or a part of the structure of the sound generating unit may contact a position where one or more parts of the external auditory canal 100 are located, such as the crus helicalis 109, the concha 103, the triangular fossa 104, the antihelix 105, the scaphoid fossa 106, and the helix 107. Furthermore, for example, the whole or a part of the structure of the sound generating unit 11 may be located within a cavity formed by one or more parts of the ear 100 (for example, the concha cavity 102, the concha 103, and the triangular fossa 104, etc.) (for example, the region M1 including at least the concha 103 and the triangular fossa 104, and the region M2 including at least the concha cavity 102, which are surrounded by dotted lines in FIG. 1).

[0017] In order to improve the stability of the earphone 10 in the worn state, the earphone 10 can use any one of the following methods or a combination thereof. In method 1, at least a part of the suspension structure 12 is set to a conforming structure that fits at least one of the rear inner surface of the pinna and the head, thereby increasing the contact area between the suspension structure 12 and the ear and / or head, and increasing the resistance of the audio device 10 to falling off from the ear. In method 2, at least a part of the suspension structure 12 is set to an elastic structure, thereby having a certain amount of deformation in the worn state, increasing the positive pressure of the suspension structure 12 on the ear and / or head, and increasing the resistance of the earphone 10 to falling off from the ear. In method 3, at least a part of the suspension structure 12 is provided to abut against the ear and / or head in the worn state, thereby forming a reaction force that presses the ear, and pressing the sound generating unit 11 against the front outer surface of the pinna (for example, the area M1 and area M2 shown in FIG. 1), and increasing the resistance of the earphone 10 to falling off from the ear. In method 4, the sound generating unit 11 and the suspension structure 12 are arranged to clamp the antihelix region, the region where the concha cavity is located, etc. from both the anterior outer surface and the posterior inner surface of the auricle when worn, thereby increasing the resistance of the earphone 10 to falling off from the ear. In method 5, the sound generating unit 11 or the structure connected thereto is arranged so that at least a part of it is inserted into a cavity such as the concha cavity 102, the concha navicular 103, the triangular fossa 104, or the navicular fossa 106, thereby increasing the resistance of the earphone 10 to falling off from the ear.

[0018] Exemplarily, as shown in FIG. 3, in the worn state, the end FE (also called the free end) of the sound generating unit 11 may be inserted into the cavity of the concha. Preferably, the sound generating unit 11 and the suspension structure 12 may be provided to jointly hold the ear region corresponding to the cavity of the concha from both the front and rear sides of the ear region, in order to increase the resistance of the earphone 10 against falling off from the ear and further improve the stability of the earphone 10 in the worn state. For example, the end FE of the sound generating unit is pressed into the cavity of the concha in the thickness direction Z. Also, for example, the end FE abuts on the inside of the cavity of the concha in the long axis direction X and / or the short axis direction Y (for example, abuts on the inner wall of the cavity of the concha facing the end FE). Note that the end FE of the sound generating unit 11 is an end of the sound generating unit 11 provided opposite the fixed end connected to the suspension structure 12, and is also called the free end. The sound generating unit 11 may be a regular or irregular structure, but here, the end FE of the sound generating unit 11 will be described as an example to further explain the structure. For example, when the sound generating unit 11 has a rectangular parallelepiped structure, the end wall surface of the sound generating unit 11 is a plane, and in this case, the end FE of the sound generating unit 11 is an end side wall provided in the sound generating unit 11 facing the fixed end connected to the hanging structure 12. Also, for example, when the sound generating unit 11 is a sphere, an ellipsoid, or an irregular structure, the end FE of the sound generating unit 11 may be a specific region away from the fixed end obtained by cutting the sound generating unit 11 along the YZ plane (a plane formed by the minor axis direction Y and the thickness direction Z), and the ratio of the dimension of the specific region along the major axis direction X to the dimension of the sound generating unit along the major axis direction X may be 0.05 to 0.2.

[0019] By inserting at least a part of the sound generating unit 11 into the cavity of the concha, it is possible to increase the listening volume at the listening position (e.g., the ear canal opening), especially the listening volume of the mid-low frequency, while still maintaining a good effect of canceling sound leakage in the far field. As a mere illustrative explanation, when the whole or part of the structure of the sound generating unit 11 is inserted into the cavity of the concha 102, the sound generating unit 11 and the cavity of the concha 102 form a structure similar to a cavity (hereinafter, abbreviated as a similar cavity structure), and in the embodiments of the specification, the similar cavity structure may be understood as a semi-closed structure surrounded by the side wall of the sound generating unit 11 and the cavity of the concha 102 structure, and the semi-closed structure does not completely seal the listening position (e.g., the ear canal opening) and isolate it from the external environment, but has a leaking structure (e.g., an opening, a gap, a tube, etc.) that acoustically communicates with the external environment. When the user wears the earphone 10, the housing of the sound generating unit 11 may be provided with one or more sound output holes on a side close to or facing the user's ear canal, and one or more decompression holes may be provided on another side wall of the housing of the sound generating unit 11 (e.g., a side wall away from or facing away from the user's ear canal), and the sound output holes may be acoustically coupled to the front cavity of the earphone 10, and the decompression holes may be acoustically coupled to the rear cavity of the earphone 10. Taking the sound generating unit 11 as an example including one sound output hole and one decompression hole, the sound output from the sound output hole and the sound output from the decompression hole can be regarded as approximately two sound sources, and the sound phases of the two sound sources are opposite to each other and form a dipole, the sound generating unit 11 and the inner wall corresponding to the concha 102 form a similar cavity structure, the sound source corresponding to the sound output hole is located inside the similar cavity structure, and the sound source corresponding to the decompression hole is located outside the similar cavity structure, forming the acoustic model shown in FIG. 4. 4, the similar cavity structure 402 may include a listening position and at least one sound source 401A. Here, "including" may indicate that at least one of the listening position and the sound source 401A is inside the similar cavity structure 402, or may indicate that at least one of the listening position and the sound source 401A is at an edge of the inside of the similar cavity structure 402.The listening position may be equivalent to the ear canal opening of the ear, may be an acoustic reference point of the ear, such as ERP, DRP, etc., or may be an entrance structure that guides the listener. The sound source 401B is located outside the similar cavity structure 402, and the anti-phase sound sources 401A and 401B form a dipole. The dipole radiates sound into the surrounding space, respectively, to generate interference cancellation of sound waves, thereby achieving a sound leakage cancellation effect. Since the difference in acoustic distance between the two sounds is large at the listening position, the sound cancellation effect is not significant, and the sound is heard at the listening position more loudly than at other positions. Specifically, since the sound source 401A is surrounded by the similar cavity structure 402, most of the radiated sound reaches the listening position in a direct or reflected manner. In contrast, without the similar cavity structure 402, most of the sound radiated from the sound source 401A does not reach the listening position. Therefore, by providing the similar cavity structure 402, the volume of the sound reaching the listening position is significantly increased. Also, only a small portion of the anti-phase sound radiated from the anti-phase sound source 401B outside the analogous cavity structure 402 enters the analogous cavity structure 402 through the leakage structure 403 of the analogous cavity structure 402. This corresponds to a secondary sound source 401B' having an intensity significantly smaller than that of the sound source 401B and significantly smaller than that of the sound source 401A being generated in the leakage structure 403. The sound generated by the secondary sound source 401B' has a low effect of anti-phase cancellation with the sound source 401A in the cavity, thereby significantly increasing the listening volume at the listening position. Regarding sound leakage, the sound source 401A radiates sound to the outside through the cavity leakage structure 402, which is equivalent to the secondary sound source 401A' being generated in the leakage structure 402. Most of the sound radiated from the sound source 401A is output from the leakage structure 403, and since the scale of the similar cavity structure 402 is much smaller (at least one order of magnitude smaller) than the spatial scale for evaluating sound leakage, the strength of the secondary sound source 401A' is considered to be equivalent to the strength of the sound source 401A. The canceling effect of the sounds generated by the secondary sound source 401A' and the sound source 401B in the external space is equivalent to the canceling effect of the sounds generated by the sound source 401A and the sound source 401B. In other words, the similar cavity structure still maintains a certain degree of sound leakage reduction effect.

[0020] In a specific application scenario, the outer wall surface of the housing of the sound generating unit 11 is usually flat or curved, and the contour of the user's concha has an uneven structure. By inserting a part or the entire structure of the sound generating unit 11 into the concha, a similar cavity structure communicating with the outside is formed between the sound generating unit 11 and the contour of the concha. Furthermore, by providing a sound emission hole in a position on the housing of the sound generating unit facing the user's ear canal opening and in a position close to the edge of the concha, and providing a decompression hole in a position away from the ear canal opening of the sound generating unit 11 or away from the ear canal opening, the acoustic model shown in FIG. 4 can be constructed, whereby, when the user is wearing earphones, the listening volume at the user's ear canal can be increased and sound leakage in the far field can be reduced.

[0021] FIG. 5 is an exemplary schematic diagram of an earphone according to some embodiments of the present disclosure.

[0022] As shown in FIG. 5, the earphone 10 includes a sound generating unit 11 and a suspension structure 12. In some embodiments, the sound generating unit 11 of the earphone 10 may include a transducer and a housing for accommodating the transducer, and the transducer is an element that can receive an electric signal, convert it into an audio signal, and output it. In some embodiments, when distinguished according to frequency, the type of transducer may include a low frequency (e.g., 30Hz-150Hz) speaker, a mid-low frequency (e.g., 150Hz-500Hz) speaker, a mid-high frequency (e.g., 500Hz-5kHz) speaker, a high frequency (e.g., 5kHz-16kHz) speaker, or a full frequency band (e.g., 30Hz-16kHz) speaker, or any combination thereof. Here, low frequency, high frequency, etc., only represent a rough range of frequencies, and different application scenarios may have different division methods. For example, a crossover frequency is determined, and the low frequency represents the frequency range below the crossover frequency, and the high frequency represents the frequency range above the crossover frequency. The crossover frequency may be any value within the audible range of the human ear, such as 500Hz, 600Hz, 700Hz, 800Hz, 1000Hz, etc.

[0023] In some embodiments, the transducer may include one diaphragm. When the diaphragm vibrates, sound is emitted from the front and rear sides of the diaphragm, respectively. In some embodiments, a front cavity (not shown) for transmitting sound is provided in the housing at a position on the front side of the diaphragm. The front cavity is acoustically coupled to a sound output hole, and sound from the front side of the diaphragm can be emitted from the sound output hole via the front cavity. A rear cavity (not shown) for transmitting sound is provided in the housing at a position on the rear side of the diaphragm. The rear cavity is acoustically coupled to a decompression hole, and sound from the rear side of the diaphragm can be emitted from the decompression hole via the rear cavity.

[0024] As shown in FIG. 5, an ear hook is described herein as an example of the hanging structure 12. In some embodiments, the ear hook may include a first part 121 and a second part 122 connected in sequence, and in order to mount the sound generating unit 11 at a position near the user's ear canal that does not block the ear canal opening, the first part 121 may be hung between the rear inner surface of the user's pinna and the head, and the second part 122 may extend to the front outer surface of the pinna (the side of the pinna facing the head of the human body along the coronal axis direction) and be connected to the sound generating unit 11. In some embodiments, a sound emission hole may be formed in a side wall of the housing of the sound generating unit 11 facing the pinna in order to guide the sound generated by the transducer out of the housing and transmit it to the user's ear canal opening. In some embodiments, when the user wears the earphone 10, at least a part of the sound generating unit 11 can be inserted into the user's concha cavity (for example, the position of the sound generating unit 11B relative to the ear shown in FIG. 2) to form the aforementioned similar cavity structure, thereby increasing the listening volume at the ear canal opening.

[0025] In some embodiments, the earphone 10 may further include a microphone for collecting an acoustic signal (e.g., a user's voice, an environmental sound, etc.), and the microphone may be located in the ear or the sound generating unit, and the sound generating unit or the ear has a sound collecting hole that is in acoustic communication with the microphone. In some embodiments, the earphone 10 may include a microphone assembly, and the microphone assembly may include a first microphone and a second microphone, and the first microphone and the second microphone can collect an audio signal at a corresponding position, for example, a user's voice, an environmental sound, etc. In some embodiments, the first microphone and the second microphone may both be provided in the sound generating unit 11. In some embodiments, the first microphone and the second microphone may both be provided in the ear. In some embodiments, one of the first microphone and the second microphone may be provided in the ear, and the other may be provided in the sound generating unit 11. The following description will be given using Figure 5 as an example. As shown in Figure 5, a first microphone (not shown in Figure 5) is located within the ear hook, and a first sound collection hole 1191 that is acoustically connected to the first microphone is formed in the ear hook, and a second microphone (not shown in Figure 5) is located within the sound generation unit 11, and a second sound collection hole 1192 that is acoustically connected to the second microphone is formed in the sound generation unit 11. When a user is wearing the earphones, neither the first sound collection hole 1191 nor the second sound collection hole 1192 is blocked, and sound information when the user speaks or external sound information can be received.In some embodiments, the first sound collection hole 1191 and the second sound collection hole 1192 may be a two-hole structure, for example, the number of the first sound collection holes 1191 is two, the first microphone corresponds to the two first sound collection holes 1191, and the two first sound collection holes 1191 are connected inside the ear hook or the sound generating unit. When there is a pressure fluctuation due to air flow speed in the external environment, by setting the first sound collection hole 1191 and the second sound collection hole 1192 to a two-hole structure, the pressure can be balanced outside the first sound collection hole 1191 and the second sound collection hole 1192 (the outer surface of the ear hook or the sound generating unit where the sound collection holes are located) and then the pressure can be transmitted to the inside of the first sound collection hole 1191 and the second sound collection hole 1192. Since the inner central axis of the first sound collection hole 1191 and the second sound collection hole 1192 is perpendicular to the airflow direction, the pressure fluctuation is small, and the resulting wind noise is correspondingly small. Therefore, by providing the first microphone, the second microphone, the first sound collection hole 1191 that is in acoustic communication with the first microphone, and the second sound collection hole 1192 that is in acoustic communication with the second microphone, it is possible to play a role in reducing wind noise. In some embodiments, the first sound collection hole 1191 and the second sound collection hole 1192 may have a regular or irregular shape, such as a circular hole, a square hole, an elliptical hole, a diamond hole, etc. The shape of the first sound collection hole 1191 and the shape of the second sound collection hole 1192 may be the same or different.

[0026] FIG. 6 is an exemplary schematic diagram of an earphone according to some embodiments of the present disclosure.

[0027] As shown in FIG. 5 and FIG. 6, in some embodiments, when the earphone 10 is in a worn state, at least a part of the sound generating unit 11 may be inserted into the user's concha. In some embodiments, in order for the first microphone and the second microphone to have a good sound collection effect, a line connecting the first sound collection hole 1191 and the second sound collection hole 1192 may be directed toward the user's mouth. In some embodiments, in order to improve the sound collection effect when the first microphone collects the sound emitted from the user's mouth, the first sound collection hole 1191 may be located at a position closest to the mouth of the earphone 10 in a worn state. Since both the first sound collection hole 1191 and the second sound collection hole 1192 are close to the user's mouth, the sound emitted from the user's mouth is a near-field sound for both the first microphone and the second microphone. In addition, because the distances between the first sound collecting hole 1191 and the second sound collecting hole 1192 and the user's mouth are different, there is a difference between the sound emitted from the user's mouth received by the first microphone and the second microphone (for example, the amplitude or phase of the sound is different). The noise from the environment can be regarded as far-field sound for the first microphone and the second microphone, and the noise received by the first microphone and the second microphone are almost the same (for example, the amplitude or phase of the sound is almost the same), and then the signal received by the second microphone is subtracted from the signal received by the first microphone and then amplified, so that a good human voice effect can be obtained after removing the noise.Based on this, in order to facilitate subsequent signal processing, it is necessary to set a certain distance between the first sound collection hole 1191 and the second sound collection hole 1192. When the earphone 10 is in a worn state, at least a part of the sound generating unit 11 is inserted into the cavity of the concha. Therefore, on the premise that the first sound collection hole 1191 is provided in a position close to the user's mouth and the distance between the first sound collection hole 1191 and the second sound collection hole 1192 is guaranteed, the second sound collection hole 1192 may be close to the antihelix. As a result, when sound waves generated by the user's speech or external sound waves are transmitted to the antihelix, the antihelix causes a reflection effect on the sound waves. Especially within the frequency range of 3kHz to 8kHz, the sound received by the second microphone is louder than the sound received by the first microphone, which affects the subsequent noise reduction and sound collection effects. Based on the above problem, in some embodiments, the noise reduction and sound collection effect of the earphone can be ensured by adjusting the distance between the first sound collection hole 1191 and the second sound collection hole 1192 and the distance between the second sound collection hole 1192 and the edge of the antihelix of the user. As shown in Fig. 6, when the earphone 10 is in a wearing state, the first sound collection hole 1191 may have a first projection point P on the sagittal plane of the user (for example, the TS plane shown in Fig. 6), and the second sound collection hole 1192 may have a second projection point O on the sagittal plane of the user. In some embodiments, in order to more clearly describe the positional relationship between the first sound collection hole 1191, the second sound collection hole 1192, and the antihelix of the user's pinna, the distance between the first sound collection hole 1191 and the second sound collection hole 1192 may be reflected by a first distance OP between a first projection point P of the first sound collection hole 1191 onto the sagittal plane and a second projection point O of the second sound collection hole 1192 onto the sagittal plane. In some embodiments, an extension line of a line connecting the first projection point P of the first sound collection hole onto the user's sagittal plane and the second projection point O of the second sound collection hole onto the sagittal plane has an intersection point A, and the distance between the second sound collection hole 1192 and the user's antihelix may be reflected by a second distance OA between the second projection point O of the second sound collection hole 1192 onto the sagittal plane and the intersection point A.The cavity of the concha is a recessed area below the crus helix, that is, the edge of the cavity of the concha is at least the lower sidewall of the crus helix, the contour of the tragus, the intertragic notch antitragus, the posterior auricular groove, and the contour of the antihelical body corresponding to the cavity of the concha. Based on this, in some embodiments, in order to ensure that the first microphone and the second microphone of the earphone 10 have good sound collection effect and noise reduction effect, the ratio of the first distance OP between the first projection point P and the second projection point O to the second distance OA between the second projection point O and the intersection point A may be 1.8 to 4.4. In order to reduce the effect of the antihelix on the second microphone, the distance between the second sound collection hole 1192 and the antihelix is ​​increased, and the distance between the first sound collection hole 1191 and the second sound collection hole 1192 is also increased, thereby making it easier to process subsequent signals, and preferably, the ratio of the first distance OP between the first projection point P and the second projection point O to the second distance OA between the second projection point O and the intersection point A may be 2.5 to 3.8. Preferably, when the wearing position of the earphone does not change, in order to further reduce the influence of the antihelix on the second microphone, the distance between the second sound collection hole 1192 and the antihelix is ​​increased, and the distance between the first sound collection hole 1191 and the second sound collection hole 1192 is increased, thereby making it easier to process subsequent signals, and in some embodiments, the ratio of the first distance OP between the first projection point P and the second projection point O to the second distance OA between the second projection point O and the intersection point A may be 2.8 to 3.5. Considering the reduction of the influence of the antihelix on the second microphone and the ease of subsequent signal processing, the distance between the second sound collection hole 1192 and the antihelix may be further increased, and the distance between the first sound collection hole 1191 and the second sound collection hole 1192 may be further increased, and more preferably, the ratio of the first distance OP between the first projection point P and the second projection point O to the second distance OA between the second projection point O and the intersection point A may be 3.0 to 3.3.

[0028] In this specification, the first projection point P may be the centroid of the projection of the first sound collection hole 1191 onto the sagittal plane of the user, and similarly, the second projection point O may be the centroid of the projection of the second sound collection hole 1192 onto the sagittal plane of the user. When the dimensions of the first sound collection hole 1191 and the second sound collection hole 1192 are relatively small (for example, the diameter is smaller than 2 mm), the projections of the first sound collection hole 1191 and the second sound collection hole 1192 onto the sagittal plane can be regarded as approximately one point.

[0029] If the second sound collecting hole 1192 is close to the antihelix, when the sound waves generated by the user's speech or external sound waves are transmitted to the antihelix, the antihelix causes a reflection effect on the sound waves, and the sound received by the second microphone becomes louder than the sound received by the first microphone, especially in the frequency range of 3kHz to 8kHz, affecting the subsequent noise reduction and sound collection effects. In addition, since the dimensions of the sound generating unit 11 are limited, it is necessary to ensure that there is a large distance between the first sound collecting hole 1191 and the second sound collecting hole 1192. If the second sound collecting hole 1192 is far from the antihelix, the distance between the first sound collecting hole 1191 and the second sound collecting hole 1192 becomes small, affecting the subsequent signal processing. Based on this, in some embodiments, in order to ensure that there is a sufficient difference between the sounds emitted from the user's mouth received by the first microphone and the second microphone, and to reduce the sound reinforcement effect at the second sound collection hole 1192 due to the antihelix, the distance between the second projection point O of the second sound collection hole 1192 on the sagittal plane and the intersection point A may be 2 mm to 10 mm. In order to reduce the sound reinforcement effect at the second sound collection hole 1192 due to the antihelix and to improve the sound collection effect of the first microphone and the second microphone, the distance between the second sound collection hole 1192 and the antihelix may be increased, and in some embodiments, the distance between the second projection point O and the intersection point A may be 4 mm to 10 mm. In order to further reduce the reflection effect of the sound waves by the antihelix and further improve the sound collection effect of the first microphone and the second microphone, the distance between the second sound collection hole 1192 and the antihelix may be further increased, and preferably, the distance between the second projection point O and the intersection point A may be 6 mm to 10 mm. When the second sound collection hole 1192 is provided at a position far from the antihelix, the reflection action of the sound waves by the antihelix hardly affects the second sound collection hole 1192, and more preferably, the distance between the second projection point O and the intersection point A may be 8 mm to 10 mm.

[0030] If the distance between the first sound input hole 1191 and the second sound input hole 1192 is too small, the difference in amplitude and phase of the low-frequency audio signals received by the first microphone and the second microphone will be too small, increasing the difficulty of processing the subsequent low-frequency signals, so the distance between the first sound input hole 1191 and the second sound input hole 1192 should also not be too small.

[0031] In some embodiments, in order to ensure that the first microphone and the second microphone have a good sound collection effect and facilitate subsequent signal processing, the distance between the first sound collection hole 1191 and the second sound collection hole 1192 may be 10 mm or more. In order to ensure the portability of the earphone and the comfort of the user when wearing the earphone, the size of the sound generating unit 11 itself should not be too large, and correspondingly, the distance between the first sound collection hole 1191 and the second sound collection hole 1192 is limited by the size of the sound generating unit 11, and in some embodiments, the distance between the first sound collection hole 1191 and the second sound collection hole 1192 is 50 mm or less. In some embodiments, taking into consideration the size limitations of the sound generating unit 11 itself, the good sound collection effect of the first and second microphones, and the ease of subsequent signal processing, the distance between the first sound collection hole 1191 and the second sound collection hole 1192 may be 10 mm to 50 mm. The distance between the first sound collection hole 1191 and the second sound collection hole 1192 here refers to the linear distance between the centers of the openings of the first sound collection hole 1191 and the second sound collection hole 1192 on the outer surface of the sound generating unit 11 or the ear hook 12 (for example, the distance D12 shown in FIG. 5). Considering that if the size of the sound generating unit 11 is too large, it will affect the portability, wearing stability, and comfort of the earphone. Here, on the premise that the first microphone and the second microphone have a good sound collecting effect and ensure that the subsequent signal processing is easy, in order to make the size of the sound generating unit 11 relatively small, the distance between the first sound collecting hole 1191 and the second sound collecting hole 1192 may be appropriately small, and preferably, in some embodiments, the distance between the first sound collecting hole 1191 and the second sound collecting hole 1192 may be 20 mm to 47 mm. More preferably, in order that there is a sufficient difference between the sound signals received by the first microphone and the second microphone and the sound generating unit 11 has an appropriate size, the distance between the first sound collecting hole 1191 and the second sound collecting hole 1192 may be 27 mm to 32 mm. As a specific example, the distance between the first sound collecting hole 1191 and the second sound collecting hole 1192 may be 26 mm.

[0032] In some embodiments, the distance between the first sound collection hole 1191 and the second sound collection hole 1192 may be further represented by the distance between the first projection point P of the first sound collection hole 1191 on the sagittal plane and the second projection point O of the second sound collection hole 1192 on the sagittal plane. If the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 is not parallel to the sagittal plane of the user, the distance between the first sound collection hole 1191 and the second sound collection hole 1192 may have a certain difference compared to the distance between the first projection point P and the second projection point O, and specifically, the distance between the first sound collection hole 1191 and the second sound collection hole 1192 may be understood to be greater than the distance between the first projection point P and the second projection point O. With reference to the above description regarding the distance between the first sound collection hole 1191 and the second sound collection hole 1192, and taking into consideration the dimensional limitations of the sound generating unit 11 itself, the good sound collection effect of the first microphone and the second microphone, and the ease of subsequent signal processing, in some embodiments, the distance between the first projection point P of the first sound collection hole 1191 on the sagittal plane and the second projection point O of the second sound collection hole 1192 on the sagittal plane may be 8 mm to 48 mm. Preferably, the distance between the first projection point P of the first sound collection hole 1191 on the sagittal plane and the second projection point O of the second sound collection hole 1192 on the sagittal plane may be 18 mm to 45 mm. More preferably, the distance between the first projection point P of the first sound collection hole 1191 on the sagittal plane and the second projection point O of the second sound collection hole 1192 on the sagittal plane may be 25 mm to 30 mm.

[0033] In this wearing state, in order to facilitate subsequent signal processing, the distance between the first sound collecting hole 1191 and the user's mouth (see point Q in FIG. 6) is smaller than the distance between the second sound collecting hole 1192 and the user's mouth. As shown in FIG. 6, when the earphone 10 is in the wearing state, the first sound collecting hole 1191 may have a first projection point P on the user's sagittal plane (for example, the TS plane shown in FIG. 6), the second sound collecting hole 1192 may have a second projection point O on the user's sagittal plane, and the third projection point Q represents the projection of the user's mouth (for example, lips) onto the user's sagittal plane, and the user's mouth has a third projection point Q on the user's sagittal plane, and the distance between PQ is smaller than the distance between OQ.

[0034] In some embodiments, a line connecting the first projection point P of the first sound collecting hole 1191 on the sagittal plane of the user and the second projection point O of the second sound collecting hole 1192 on the sagittal plane is directed approximately to the third projection point Q of the user's mouth on the sagittal plane. In this way, a directivity algorithm can be constructed based on the voice received by the first microphone and the second microphone to make the received user voice clearer. In some embodiments, a line PQ connecting the first projection point P and the third projection point Q may form a certain angle with a line OQ connecting the second projection point O and the third projection point Q, and the included angle between PQ and OQ may be smaller than 30° to ensure the directivity of the first sound collecting hole 1191 and the second sound collecting hole 1192. In some embodiments, the included angle between PQ and OQ may be 5° to 25°. Preferably, the angle between PQ and OQ may be 8° to 15°. Exemplarily, in some embodiments, the angle between PQ and OQ may be 0°, 3°, 9°, or 15°, etc.

[0035] 5, in some embodiments, the first sound collection hole 1191 may be provided in the second part 112 of the ear hook (the part of the ear hook close to the sound generating unit). Specifically, in some embodiments, the first sound collection hole 1191 may be provided near the connection point between the second part 122 of the ear hook and the sound generating unit 11. For example, the first sound collection hole 1191 may be provided in the second part 122 of the ear hook, or may be provided in the sound generating unit 11. In this specification, "the first sound collection hole 1191 may be provided near the connection point between the second part 122 of the ear hook and the sound generating unit 11" may be understood to mean that the minimum distance between the first sound collection hole 1191 and the connection point is 4 mm or less. In some embodiments, the positional relationship between the first sound collection hole 1191, the second ear hook portion 122, and the sound generating unit 11 may be further represented by the distance between the projection of the first sound collection hole 1191 onto the sagittal plane and the projection of the connection point onto the sagittal plane. For example, in some embodiments, the minimum distance between the projection of the first sound collection hole 1191 onto the sagittal plane and the projection of the connection point onto the sagittal plane may be 4 mm or less. When the user is wearing earphones, the sound generating unit 11 is closer to the user's mouth, and in order to improve the sound collection effect of the first microphone, the minimum distance between the projection of the first sound collection hole 1191 onto the sagittal plane and the projection of the connection point onto the sagittal plane may preferably be 3 mm or less. In some embodiments, the first sound collecting hole 1191 may be further provided at the connection point between the sound generating unit 11 and the second part 122 of the ear hook, in which case the first sound collecting hole 1191 is closer to the user's mouth, and the sound collecting effect of the first microphone is better. In some embodiments, the sound generating unit 11 and the second part 122 of the ear hook may be independent structures, and the two may be connected by a method such as joining, fitting, or insertion, and the connection point between the sound generating unit 11 and the second part 122 of the ear hook may be the connection gap between them. The projection of the connection point between the sound generating unit 11 and the second part 122 of the ear hook onto the sagittal plane is the projection of the connection gap between them onto the sagittal plane.In some embodiments, the first sound collection hole 1191 is provided near the connection point between the sound generating unit 11 and the second part 122 of the earhook (for example, the first sound collection hole 1191 is provided in the second part 122 of the earhook), thereby ensuring that the first sound collection hole 1191 is close to the user and does not occupy the internal cavity space of the sound generating unit 11, which makes it easier to attach the transducer and wire the internal circuitry, and effectively improves production efficiency.

[0036] In some embodiments, when the dimensions of the first sound collection hole 1191 and the second sound collection hole 1192 are small, they can be considered to be approximately one point. In some embodiments, when the dimensions of the first sound collection hole 1191 and the second sound collection hole 1192 are large, the distance between the first sound collection hole 1191 and the connection point between the sound generation unit 11 and the second earhook part 122 may be understood as the minimum distance between the center of the first sound collection hole 1191 and the connection point between the sound generation unit 11 and the second earhook part 122. Correspondingly, when the size of the first sound collection hole 1191 is small, the projection of the first sound collection hole 1191 onto the sagittal plane can be considered to be approximately one point, and the minimum distance between the projection of the first sound collection hole 1191 onto the sagittal plane and the projection of the connection point between the sound generating unit 11 and the second part 122 of the ear hook onto the sagittal plane is the minimum distance between the projection point of the first sound collection hole 1191 onto the sagittal plane and the projection of the connection point onto the sagittal plane. When the size of the first sound collection hole 1191 is large, the minimum distance between the projection of the first sound collection hole 1191 onto the sagittal plane and the projection of the connection point between the sound generating unit 11 and the second part 122 of the ear hook onto the sagittal plane is the minimum distance between the centroid of the projection of the first sound collection hole 1191 onto the sagittal plane and the projection of the connection point onto the sagittal plane. Similarly, the distance between a sound collection hole and a certain side of the sound generating unit 11 (e.g., the inner side, the upper side) described elsewhere in this specification may be understood as the minimum distance from the center of the sound collection hole to that side of the sound generating unit 11.

[0037] It should be understood that the positions of the first sound collection hole 1191 and the second sound collection hole 1192 shown in FIG. 5 are merely illustrative. In some embodiments, the first sound collection hole 1191 and / or the second sound collection hole 1192 may be provided at other positions that are not blocked. For example, in some embodiments, the first sound collection hole 1191 and the second sound collection hole 1192 may both be provided on the outer surface of the sound generating unit 11. Also, for example, in some embodiments, the first sound collection hole 1191 may be provided on the outer surface of the sound generating unit 11, and the second sound collection hole 1192 may be provided on the upper side surface of the sound generating unit 11. In this specification, the inner surface of the sound generating unit 11 may be the surface of the earphone 10 in a worn state that is closest to the user's head (see inner surface IS in Figs. 15A and 15B), and the upper surface of the sound generating unit 11 may be the surface of the earphone 10 in a worn state that is farthest from the ground (see upper surface US in Figs. 15A and 15B). Correspondingly, the surface facing the inner surface may be regarded as the outer surface of the sound generating unit 10 (see outer surface OS in Fig. 15A), and the surface facing the upper surface may be regarded as the lower surface of the sound generating unit 10 (see lower surface LS in Fig. 15B). In some embodiments, each of the upper surface, lower surface, inner surface, and outer surface of the sound generating unit 11 may be flat and / or non-flat. Hereinafter, specific distribution positions of the first sound collecting hole 1191 and the second sound collecting hole 1192 will be described with reference to Figs. 7 to 16B.

[0038] FIG. 7 is an exemplary schematic diagram of an earphone according to some other embodiments of the present disclosure.

[0039] As shown in Fig. 7, the shape of the projection of the sound generating unit 11 onto the sagittal plane may include a long axis direction X and a short axis direction Y. Fig. 8 is a schematic diagram of an exemplary coordinate system established based on the projection of the sound generating unit onto the sagittal plane according to some embodiments of the present specification, and as shown in Fig. 8, a coordinate system is established with a long axis direction X and a short axis direction Y, and the relative position of the first sound collection hole 1191 with respect to the sound generating unit 11 is represented by coordinates in the coordinate system, the Y axis is parallel to the short axis direction Y and is a tangent to the projection of the front side surface of the sound generating unit 11 onto the sagittal plane, and the X axis is parallel to the long axis direction X and is a tangent to the projection of the lower side surface of the sound generating unit 11 onto the sagittal plane. In some embodiments, the method of determining the position of the Y-axis is to first determine the projection of the sound generating unit 11 onto the sagittal plane, find a tangent (abbreviated as "tangent I") that is parallel to the short axis direction Y and is tangent to the projection of the rear side of the sound generating unit 11 onto the sagittal plane, determine the center of the projection of the diaphragm or magnetic circuit assembly in the sound generating unit 11 onto the sagittal plane, find a line of symmetry of tangent I centered on that center, and define the line of symmetry as the straight line on which the Y-axis is located.

[0040] As shown in FIG. 8, on the Y axis, 1X may represent the line Y=1, 2X may represent the line Y=2, 3X may represent the line Y=3, and 4X may represent the line Y=4. Similarly, on the X axis, Y1 may represent the line X=1, Y2 may represent the line X=2, and Y3 may represent the line X=3. In some embodiments, the coordinates of a point in the coordinate system may be expressed as YX. For example, in the line Y=2, the line Y=2 is parallel to the X axis and the value of Y=2 does not change, so the coordinates of a point on this line may be unified as 2X. When X takes different values, different positions, for example, positions 21, 22, and 23, can be obtained. As shown in FIG. 7 and FIG. 8, in some embodiments, the sound generating unit 11 may be divided into four equal parts in the long axis direction X, and the sound generating unit 11 may be divided into four equal parts in the short axis direction Y. In some embodiments, the sound generating unit 11 may be divided into other numbers of equal parts in the long axis direction X and the short axis direction Y. Hereinafter, the sound collection situation when the first sound collection hole 1191 is located at different positions based on the coordinate system will be described.

[0041] 9 is a schematic diagram of the sound collection curve when the first sound collection hole is located at different positions according to some embodiments of the present specification. As shown in FIG. 9, when Y=1, the coordinate along the X-axis direction on the line Y=1 may be unified as 1X, and when X takes different values, the corresponding positions, such as position 11, position 12, position 13, position 14, etc., can be determined. As shown in FIG. 9 , in order to ensure that the first microphone has a good sound collection effect, that the second sound collection hole can maintain a specific distance from the first sound collection hole, and that the second sound collection hole is as far away from the antihelix as possible, the ratio of the distance in the long axis direction X between the first projection point P of the first sound collection hole 1191 onto the sagittal plane and the projection of the front side of the sound generating unit 11 onto the sagittal plane to the dimension along the long axis direction X of the projection of the sound generating unit 11 onto the sagittal plane may be 0.75 or less, that is, when the sound generating unit 11 is divided into four equal parts along the long axis direction X, the first projection point P is located in the area of ​​X≦3. In order to improve the sound collection effect of the first microphone by bringing the first sound collection hole 1191 closer to the user's mouth, preferably, the ratio of the distance in the long axis direction X between the first projection point P of the first sound collection hole 1191 on the sagittal plane and the projection of the front side surface of the sound generating unit 11 on the sagittal plane to the dimension along the long axis direction X of the projection of the sound generating unit 11 on the sagittal plane may be 0.5 or less. More preferably, in order to improve the sound collection effect of the first microphone by bringing the first sound collection hole 1191 closer to the user's mouth, the ratio of the distance in the long axis direction X between the first projection point P of the first sound collection hole 1191 on the sagittal plane and the projection of the front side surface of the sound generating unit 11 on the sagittal plane to the dimension along the long axis direction X of the projection of the sound generating unit 11 on the sagittal plane may be 0.3 or less.More preferably, in order to bring the first sound collection hole 1191 closer to the user's mouth and improve the sound collection effect of the first microphone, the ratio of the distance in the long axis direction X between the first projection point P of the first sound collection hole 1191 on the sagittal plane and the projection of the front side of the sound generating unit 11 on the sagittal plane to the dimension along the long axis direction X of the projection of the sound generating unit 11 on the sagittal plane may be 0.2 or less. By providing the first sound collection hole 1191 at a position close to the front side of the sound generating unit, the position of the second sound collection hole 1192 has more options, and it can be ensured that the second sound collection hole can maintain a specific distance from the first sound collection hole and that the second sound collection hole is as far away from the antihelix as possible. Based on the above idea, more preferably, the ratio of the distance in the long axis direction X between the first projection point P of the first sound collection hole 1191 on the sagittal plane and the projection of the front side surface of the sound generating unit 11 on the sagittal plane to the dimension along the long axis direction X of the projection of the sound generating unit 11 on the sagittal plane may be 0.1 or less. More preferably, in some embodiments, the first sound collection hole 1191 may be further located on the front side surface of the sound generating unit 11, in which case the first sound collection hole 1191 is closer to the user's mouth in the horizontal direction, and the sound collection effect of the first microphone is better. Note that, for ease of understanding, the distance in the long axis direction X between the first projection point P of the first sound collection hole 1191 on the sagittal plane and the projection of the front side surface of the sound generating unit 11 on the sagittal plane may be the distance between the first projection point P and the Y axis, i.e., the distance between the first projection point P and a tangent line along the short axis direction Y that is tangent to the projection of the front side surface of the sound generating unit 11 on the sagittal plane.

[0042] FIG. 10 is a schematic diagram of the sound collection curve when the first sound collection hole is located at different positions according to some other embodiments of the present specification. As shown in FIG. 10, when X=1, the coordinate along the Y-axis direction on the line X=1 may be unified and represented as Y1, and when Y takes different values, the corresponding positions, for example, positions 11, 21, 31, and 41, can be determined. FIG. 10 shows the sound collection situations of the first microphones located at positions 11, 21, 31, and 41, respectively. As can be seen from FIG. 10, the smaller the Y-axis coordinate in Y1, the closer it is to the user's mouth, and the better the sound collection effect of the microphone.

[0043] Based on this, in some embodiments, in order for the first microphone to have a good sound collection effect, the ratio of the distance in the short axis direction Y between the first projection point P of the first sound collection hole 1191 onto the sagittal plane and the projection of the lower surface of the sound generating unit onto the sagittal plane to the dimension along the short axis direction Y of the projection of the sound generating unit 11 onto the sagittal plane may be 1 or less. When the first sound collection hole 1191 and the second sound collection hole 1192 are simultaneously positioned in the sound generating unit 11, if the first sound collection hole 1191 is positioned at a position that is the maximum distance from the upper surface or front surface of the sound generating unit in the long axis direction X, the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 will not face the user's mouth, which will affect the sound collection effect. In this regard, preferably, the ratio of the distance in the short axis direction Y between the first projection point P of the first sound collection hole 1191 on the sagittal plane and the projection of the lower surface of the sound generating unit on the sagittal plane to the dimension in the short axis direction Y of the projection of the sound generating unit 11 on the sagittal plane may be 0.5 or less, that is, when the sound generating unit is divided into four equal parts along the short axis direction Y, the first projection point P is positioned in the area of ​​Y≦2. More preferably, in order to bring the first sound collection hole 1191 closer to the user's mouth and improve the sound collection effect of the first microphone, in some embodiments, the ratio of the distance in the short axis direction Y between the first projection point P of the first sound collection hole 1191 onto the sagittal plane and the projection of the lower surface of the sound generating unit 11 onto the sagittal plane to the dimension along the short axis direction Y of the projection of the sound generating unit 11 onto the sagittal plane may be 0.4 or less. Preferably, the ratio of the distance in the short axis direction Y between the first projection point P of the first sound collection hole 1191 on the sagittal plane and the projection of the lower surface of the sound generating unit 11 on the sagittal plane to the dimension along the short axis direction Y of the projection of the sound generating unit 11 on the sagittal plane may be 0.3 or less, and by providing the first sound collection hole 1191 at a position close to the lower surface of the sound generating unit, it is possible to ensure that the position of the second sound collection hole 1192 has more options, that the second sound collection hole can maintain a specific distance from the first sound collection hole, and that the line connecting the first sound collection hole and the second sound collection hole can be more accurately directed toward the user's mouth. Based on the above idea, more preferably, the ratio of the distance in the short axis direction Y between the first projection point P of the first sound collection hole 1191 on the sagittal plane and the projection of the lower surface of the sound generating unit 11 on the sagittal plane to the dimension along the short axis direction Y of the projection of the sound generating unit 11 on the sagittal plane may be 0.1 or less.More preferably, the first sound collecting hole 1191 may be located on the lower surface of the sound generating unit 11. In this case, the first sound collecting hole 1191 is closer to the user's mouth in the vertical direction, and the sound collecting effect of the first microphone is better. For ease of understanding, the distance in the short axis direction Y between the first projection point P of the first sound collecting hole 1191 on the sagittal plane and the projection of the lower surface of the sound generating unit 11 on the sagittal plane may be the distance between the first projection point P and the X axis, that is, the distance between the first projection point P and a tangent line along the long axis direction X and tangent to the projection of the lower surface of the sound generating unit 11 on the sagittal plane.

[0044] FIG. 11 is a schematic diagram of a sound collection curve when the second sound collection hole is located at different positions according to some other embodiments of the present specification. As shown in FIG. 11, when Y=4, the coordinate along the X-axis direction on the line Y=4 may be unified and expressed as 4X, and when X takes different values, corresponding positions, for example, positions 41, 42, 43, 44, etc., can be determined. FIG. 11 shows the sound collection situation at each of positions 41, 42, 43, and 44. As can be seen from FIG. 11, in 4X, as X increases, the distance from the second sound collection hole to the user's antihelix decreases, and the influence of reflection from the antihelix increases. For example, when X is large, the sound collection of the second microphone in the frequency band after 3 kHz increases significantly, so there is a change rule that the sound collection of the second microphone differs around 3 kHz. In other words, if the second sound collection hole 1192 is located close to the antihelix, the sound collection effect of the second sound collection hole 1192 from 3 kHz onwards will be stronger than that of the first sound collection hole 1191, and the sound collection effect of the first microphone and the second microphone for the sound from the user's mouth will be reduced.

[0045] FIG. 12 is a schematic diagram of the sound collection curve when the sound collection holes are located at different positions according to some other embodiments of the present specification. As shown in FIG. 12, the sound collection effect of the microphone at position 21 is higher than that of the microphone at position 33, position 34, position 43, and position 44. In some embodiments, the first sound collection hole 1191 may be provided at position 21, and the second sound collection hole 1192 may be provided at position 33, position 34, position 43, or position 44. At this time, the sound collection effect of the first sound collection hole 1191 in the entire frequency band is better than that of the second sound collection hole 1192. When the second sound collection hole 1192 is provided at position 33 or position 34, the sound collection effect of the second sound collection hole 1192 is good, and the matching with the sound collection curve at the first sound collection hole 1191 is high. After processing the signals of the first microphone and the second microphone, the voice of the user's mouth can be obtained in a wider frequency band. When the second sound collecting hole 1192 is located at position 43 or position 44, the distance between the second sound collecting hole 1192 and the first sound collecting hole 1191 is large, which is more favorable for noise reduction. After processing the signals of the first microphone and the second microphone, a clearer user's mouth sound can be obtained in the low frequency range.

[0046] FIG. 13 is a schematic diagram of the sound collection curve when the sound collection hole is located at different positions according to some other embodiments of the present specification. As shown in FIG. 13, the sound collection situation of the microphone at position 11 and position 14. The sound collection effect of the microphone at position 11 in the full frequency band is better than that of the microphone at position 14. In some embodiments, the first sound collection hole 1191 may be provided at position 11, and the second sound collection hole 1192 may be provided at position 14. At this time, the sound collection effect of the first sound collection hole 1191 and the second sound collection hole 1192 are both good. After processing the signals of the first microphone and the second microphone, the voice of the user's mouth can be obtained in a wider frequency band.

[0047] FIG. 14 is a schematic diagram of the sound collection curve when the sound collection holes are located at different positions according to some other embodiments of the present specification. As shown in FIG. 14, the sound collection situation of the microphones at positions 31 and 43. The sound collection effect of the microphone at position 31 in the full frequency band is better than that of the microphone at position 43. In some embodiments, the first sound collection hole 1191 may be provided at position 31, and the second sound collection hole 1192 may be provided at position 43. At this time, the sound collection effect of the first sound collection hole 1191 and the second sound collection hole 1192 are both good. After processing the signals of the first microphone and the second microphone, the voice of the user's mouth can be obtained in a wider frequency band.

[0048] In some embodiments, the projection of the sound generating unit 11 onto the sagittal plane may be racetrack-shaped, and has an intersection between the extensions of two sides (i.e., the projections of the lower and front sides of the sound generating unit 11) close to the mouth of the racetrack-shaped projection, and this intersection is defined as the fourth projection point (for example, the intersection G of the X-axis and the Y-axis shown in FIG. 7, the origin of the XY coordinate system shown in FIG. 8). In order to bring the first sound collecting hole 1191 as close to the user's mouth as possible, the distance between the first projection point P of the first sound collecting hole 1191 onto the sagittal plane and the fourth projection point needs to satisfy a predetermined condition. The larger the distance, the farther the distance between the first projection point P and the intersection G shown in FIG. 7 and the origin of the XY coordinate system shown in FIG. 8 becomes, and accordingly, the distance between the first sound collecting hole 1191 and the user's mouth becomes farther, and the sound collecting effect of the first microphone becomes worse. Based on this, in some embodiments, in order to ensure the sound collection effect of the first microphone, the distance between the first projection point and the fourth projection point may be 5 mm or less. In order to improve the sound collection effect of the first microphone, the first sound collection hole 1191 may be provided at a position closer to the user's mouth of the sound generating unit 11, and in some embodiments, the distance between the first projection point P and the fourth projection point may be 3 mm or less. In some embodiments, in order to further improve the sound collection effect of the first microphone, the distance between the first projection point P and the fourth projection point may be 1 mm or less, where the first sound collection hole 1191 is closer to the position of the user's mouth. Note that the projection of the sound generating unit 11 onto the sagittal plane is not limited to the above racetrack shape, and may be other regular (e.g., rectangular, elliptical, circular, etc.) or irregular shapes, as long as the first sound collection hole 1191 is provided at a position close to the user's mouth or at a position close to the origin of the XY coordinate system.

[0049] 15A and 15B are exemplary schematic diagrams of earphones according to some other embodiments of the present specification.

[0050] As shown in Fig. 15A and Fig. 15B, in some embodiments, the first sound collection hole 1191 may be located on the lower side surface LS or the front side surface CE of the sound generating unit 11. Fig. 16A and Fig. 16B are schematic diagrams of an exemplary coordinate system established based on the sound generating unit according to some other embodiments of the present specification. Specifically, as shown in Fig. 16A, when the first sound collection hole 1191 is located on the front side surface CE of the sound generating unit 11, the coordinate of the first sound collection hole 1191 in the long axis direction X of the sound generating unit 11 is 0, and the positional relationship between the first sound collection hole 1191 and the sound generating unit 11 may be represented by a YZ coordinate system, where the Z axis is the thickness direction of the sound generating unit 11 and is perpendicular to the long axis direction X and the short axis direction Y of the sound generating unit 11. 16B, when the first sound collection hole 1191 is located on the lower side surface LS of the sound generating unit 11, the coordinate of the first sound collection hole 1191 in the short axis direction Y of the sound generating unit 11 is 0, and the positional relationship between the first sound collection hole 1191 and the sound generating unit 11 may be expressed by an XZ coordinate system. A larger value of Z indicates that the first sound collection hole 1191 is farther from the inner side surface of the sound generating unit 11, a larger value of X indicates that the first sound collection hole 1191 is farther from the front side surface of the sound generating unit 11, and a larger value of Y indicates that the first sound collection hole 1191 is farther from the lower side surface of the sound generating unit 11.

[0051] If the first sound collection hole 1191 is too close to the inner surface of the sound generating unit 11 (for example, smaller than 2 mm), not only may the first sound collection hole 1191 be blocked by the user's ear while wearing the product, but the first microphone may also collect noise caused by friction between the user's ear and the sound generating unit 11. Considering this, it can be seen that the distance between the first sound collection hole 1191 and the inner surface of the sound generating unit 11 should not be too close, regardless of whether the first sound collection hole 1191 is located on the underside or front side of the sound generating unit 11. In addition, if the two ears and mouth of the human body are considered to be three points in space, and the three points form an approximately isosceles triangular area, and in order to insert the sound generating unit 11 into the concave cavum of the concha when the earphones are worn, the sound generating unit 11 needs to be arranged at an angle; that is, if the line connecting any two points on the outer surface of the sound generating unit 11 does not point toward the triangular area and the first sound collection hole 1191 is too close to the outer surface of the sound generating unit 11 (for example, the distance between the outer surface is less than 2 mm), even if the second sound collection hole 1192 is arranged on the outer surface of the sound generating unit 11, it cannot be guaranteed that the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 will point toward the user's mouth. Based on this, in some embodiments, when the first sound collection hole 1191 is located on the underside or front side of the sound generating unit 11, in order to ensure the sound collection effect of the first sound collection hole 1191 and that the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 faces the front area of ​​the user, the ratio of the distance in the thickness direction Z of the sound generating unit between the first sound collection hole 1191 and the inner surface of the sound generating unit 11 to the dimension of the sound generating unit 11 along its thickness direction Z may be 0.25 to 0.7. Preferably, the ratio of the distance between the first sound collection hole 1191 and the inner surface of the sound generating unit 11 in the thickness direction Z of the sound generating unit to the dimension of the sound generating unit 11 along the thickness direction Z may be 0.25 to 0.65. Here, by locating the first sound collection hole 1191 at a position relatively far from the inner surface of the sound generating unit 11, the influence of noise due to friction between the sound generating unit 11 and the ear can be reduced, and by reducing the distance from the first sound collection hole 1191 to the outer surface of the sound generating unit 11, the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 can be directed toward the user's mouth.More preferably, the ratio of the distance between the first sound collection hole 1191 and the inner surface of the sound generating unit 11 in the thickness direction Z of the sound generating unit to the dimension of the sound generating unit 11 along the thickness direction Z may be 0.3 to 0.6. More preferably, the ratio of the distance between the first sound collection hole 1191 and the inner surface of the sound generating unit 11 in the thickness direction Z of the sound generating unit to the dimension of the sound generating unit 11 along the thickness direction Z may be 0.3 to 0.4, and here, by further reducing the distance from the first sound collection hole 1191 to the outer surface of the sound generating unit 11, the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 can be more accurately directed toward the user's mouth. In some embodiments, the inner surface of the sound generating unit 11 has a curved shape, and in this case, the distance in the thickness direction Z of the sound generating unit between the first sound collection hole 1191 and the inner surface of the sound generating unit 11 may be equivalent to the distance between the center of the first sound collection hole 1191 and a tangent plane to the inner surface of the sound generating unit 11, and the tangent plane to the inner surface of the sound generating unit 11 is a plane that is parallel to the major axis direction X and the minor axis direction Y and is tangent to the inner surface.

[0052] In some embodiments, the first sound collection hole 1191 may be provided on the ear hook (e.g., at a position closest to the user's mouth on the ear hook), and correspondingly, in order to ensure the directivity of the line connecting the second sound collection hole 1192 and the first sound collection hole 1191, when the first sound collection hole 1191 is provided on the ear hook, the second sound collection hole 1192 may be provided near the connection point between the upper side and the front side of the sound generating unit 11. In some embodiments, the structure or shape of the ear hook of the earphone 10 can be changed to meet the position requirement required for forming the second sound collection hole 1192, thereby realizing the satisfaction of the line connecting the second sound collection hole 1192 and the first sound collection hole 1191 being approximately oriented toward the user's mouth, and the assurance that the distance between the second sound collection hole 1192 and the first sound collection hole 1191 is greater than a predetermined requirement.

[0053] In some embodiments, the second sound collection hole 1192 may be provided on the side of the sound generating unit 11 that does not form the concha cavity and the auxiliary cavity. In some embodiments, the second sound collection hole 1192 may be provided on at least one of the upper side surface US, the lower side surface LS, and the outer side surface OS of the sound generating unit 11, and both the first sound collection hole 1191 and the second sound collection hole 1192 are provided to avoid components (e.g., a speaker, a main control circuit board, etc.) in the housing of the sound generating unit 11. For example, the second sound collection hole 1192 may be provided on any one of the upper side surface US, the lower side surface LS, and the outer side surface OS of the sound generating unit 11. Also, for example, the second sound collection hole 1192 may be provided at a connection point of any two of the upper side surface US, the lower side surface LS, and the outer side surface OS of the sound generating unit 11. In some embodiments, in order to achieve a large gap between the first sound collection hole 1191 and the second sound collection hole 1192 and to achieve the directivity of the line connecting the first sound collection hole 1191 and the second sound collection hole 1192, the first sound collection hole 1191 is usually provided diagonally, for example, the first sound collection hole 1191 is provided at the lower left corner shown in FIG. 6, and the second sound collection hole 1192 is provided at the upper right corner shown in FIG. 6. In order to more clearly explain the distribution position of the second sound collection hole 1192, the description will be made here with reference to the upper side US, the lower side LS, and the rear side FE of the sound generating unit 11, respectively. In some embodiments, the second sound collection hole 1192 may be located on the outer side OS of the sound generating unit 11. In some embodiments, in order to prevent the distance between the second sound collecting hole 1192 and the user's antihelix from being too small to affect the sound collection quality, the distance d6 between the second sound collecting hole 1192 and the rear side surface FE may be 8 mm to 12 mm. Preferably, the distance d6 between the second sound collecting hole 1192 and the rear side surface FE is 9 mm to 10 mm. In order to prevent the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 from being unable to face the user's mouth, the distance between the second sound collecting hole 1192 and the upper side surface US or the lower side surface LS of the sound generating unit 11 should not be too large or too small, and the distance d5 between the second sound collecting hole 1192 and the upper side surface US of the sound generating unit 11 may be 1 mm to 3 mm, or the distance d8 between the second sound collecting hole 1192 and the lower side surface LS may be 4 mm to 8 mm.Preferably, in some embodiments, the distance d5 between the second sound collection hole 1192 and the upper side surface US may be 2 mm to 2.5 mm, or the distance d8 between the second sound collection hole 1192 and the lower side surface LS may be 6 mm to 8 mm. In order to avoid the distance between the second sound collection hole 1192 and the first sound collection hole 1191 being too small, in some embodiments, the distance d7 between the second sound collection hole 1192 and the front side surface CE is 8 mm to 12 mm. Note that in this specification, the distance from the second sound collection hole 1192 to the upper side surface, the front side surface, the rear side surface, and the lower side surface of the sound generating unit 11 may be the distance from the center of the opening of the second sound collection hole 1192 on the outer surface of the housing of the sound generating unit 11 to the upper side surface, the front side surface, the rear side surface, and the lower side surface of the sound generating unit 11. When the side surface (e.g., upper side surface, front side surface, rear side surface, lower side surface) of the sound generating unit 11 is flat, the distance is the distance from the center of the opening of the second sound collection hole 1192 on the outer surface of the housing of the sound generating unit 11 to the flat surface. When the side surface of the sound generating unit 11 is curved, the distance may be the distance from the center of the opening of the second sound collection hole 1192 on the outer surface of the housing of the sound generating unit 11 to the tangent plane of the curved surface. In this specification, the tangent plane corresponding to the upper side of the sound generating unit 11 may be a plane that is parallel to the XZ plane (or coordinate system) shown in FIG. 16B and tangent to the upper side of the sound generating unit 11; similarly, the tangent plane corresponding to the lower side of the sound generating unit 11 may be a plane that is parallel to the XZ plane (or coordinate system) shown in FIG. 16B and tangent to the lower side of the sound generating unit 11; the tangent plane corresponding to the front side of the sound generating unit 11 may be a plane that is parallel to the YZ plane (or coordinate system) shown in FIG. 16A and tangent to the front side of the sound generating unit 11; and the tangent plane corresponding to the rear side of the sound generating unit 11 may be a plane that is parallel to the XZ plane (or coordinate system) shown in FIG. 16A and tangent to the rear side of the sound generating unit 11.

[0054] 17 is a schematic diagram of an example positional relationship between a first sound collecting hole, a second sound collecting hole, and a user's mouth according to some embodiments of the present disclosure. As shown in FIG. 17, in some embodiments, the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 may be directed toward the user's mouth so that the first sound collecting hole 1191 and the second sound collecting hole 1192 have a good sound collecting effect. As shown in FIG. 17, point O represents the position of the second sound collecting hole 1192, point P and point P' represent two different arrangement positions of the first sound collecting hole 1191, respectively, and point Q represents the position of the user's mouth. In some embodiments, the included angle between a line connecting the first sound collection hole 1191 and the second sound collection hole 1192 and a line connecting the first sound collection hole 1191 and the user's mouth Q is about 150°, i.e., the magnitude of the angle OPQ and / or the angle OP'Q is about 150°. By way of example only, in some embodiments, the magnitude of the angle OPQ or the angle OP'Q may be 140° to 180°, i.e., the first sound collection hole 1191, the second sound collection hole 1192, and the user's mouth may be located on approximately the same straight line.

[0055] FIG. 18 is an exemplary schematic diagram of an earphone according to some other embodiments of the present disclosure.

[0056] When the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 faces the user's face (for example, when it is located in the middle area between the sagittal axis S and the vertical axis T in FIG. 18), the first microphone and the second microphone can have a good sound collecting effect, and when the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 faces the area between the user's mouth and the mandibular base end point, the sound collecting effect of the first microphone and the second microphone is relatively good. Based on this, in some embodiments, in order to improve the sound collecting effect of the earphone 10, the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 may face or approximately face the area between the user's mouth and the mandibular base end point. In some embodiments, the mandibular base end point of the user may be the point of the user's mandibular region that is the furthest from the user's ear.

[0057] As shown in FIG. 18, when the earphones 10 are worn, the end point of the base of the user's mandible may have a fifth projection point Q' on the user's sagittal plane, and the centroid of the projection of the user's auditory canal opening onto the sagittal plane (for example, the dotted area 1015 in FIG. 18) is B. Since at least a portion of the sound generating unit 11 of the earphones 10 needs to be inserted into the user's concha cavity while worn, the line connecting the fifth projection point Q' and the centroid B of the projection of the user's auditory canal opening onto the sagittal plane may reflect to some extent the relative positional relationship between the sound generating unit 11 and the end point of the base of the user's mandible.

[0058] 18, the first sound collection hole 1191 may have a first projection point P on the sagittal plane of the user, and the second sound collection hole 1192 may have a second projection point O on the sagittal plane of the user. In some embodiments, in order for the first sound collection hole 1191 and the second sound collection hole 1192 to have good directivity, that is, for the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 to face the area between the user's mouth and the end point of the mandibular base, the included angle θ1 between the line connecting the first projection point P and the second projection point O and the line connecting the fifth projection point Q' and the centroid B of the projection of the user's ear canal opening onto the sagittal plane may be 45° or less. In some embodiments, the included angle θ1 between the line connecting the first projection point P and the second projection point O and the line connecting the fifth projection point Q' and the centroid B of the projection of the user's ear canal opening onto the sagittal plane may be 6° to 35°, and at this time, the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 can be directed to the area near the user's mouth. Preferably, the included angle θ1 between the line connecting the first projection point P and the second projection point O and the line connecting the fifth projection point Q' and the centroid B of the projection of the user's ear canal opening onto the sagittal plane may be 10° to 25°, and at this time, the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 can be directed more accurately to the user's mouth.

[0059] When a line connecting the first projection point P of the first sound collection hole 1191 onto the sagittal plane and the second projection point O of the second sound collection hole 1192 onto the sagittal plane faces an area between the user's mouth and the end point of the base of the mandible, the first microphone and the second microphone can have a good sound collection effect. Here, the distribution positions of the first projection point P and the second projection point O will be further described with reference to the vertical axis of the user. Furthermore, as shown in FIG. 18, the line connecting the first projection point P and the second projection point O faces the area between the user's mouth and the end point of the base of the mandible, so as to better capture the voice of the user when he / she speaks. Correspondingly, here, the line connecting the first projection point P and the second projection point O has a corresponding critical direction, for example, a sagittal axis S and a vertical axis T as shown in FIG. 18, and when the line connecting the first projection point P and the second projection point O is in the coordinate system ST, the sound collection effect of the first microphone and the second microphone collecting the voice of the user when he / she speaks can be ensured. Here, the critical direction will be described based on the wearing state of the earphone. As shown in FIG. 18, the mouth is located at the lower left of the ear, and when the line connecting the first projection point P and the second projection point O faces the upper left, upper, lower right, upper right or right of the ear, the voice signal when the user speaks, acquired by the first microphone and the second microphone, is very small, so the line connecting the first projection point P and the second projection point O facing the left side of the ear is the critical direction, and the line connecting the first projection point P and the second projection point O facing the lower side of the ear is the critical direction. Based on the above description, the critical direction referred to in the embodiments of this specification may be understood to be used to represent the critical value to which the line connecting the first projection point P and the second projection point O (or the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192) faces. For example, as shown in Fig. 18, when the line connecting the first projection point P and the second projection point O faces between the two critical directions, the first microphone and the second microphone can have good directivity, where the two critical directions are represented by the user's sagittal axis S and vertical axis T. Based on this, in some embodiments, the included angle θ2 between the line connecting the first projection point P and the second projection point O and the user's vertical axis may be less than 90°.In order to improve the sound collection effect of the first microphone and the second microphone collecting the voice when the user speaks by making the line connecting the first projection point P and the second projection point O point toward the area close to the user's mouth or the end point of the mandibular base, in some embodiments, the included angle θ2 between the line connecting the first projection point P and the second projection point O and the user's vertical axis may be within a range of 20° to 80°. Preferably, the included angle θ2 between the line connecting the first projection point P and the second projection point O and the user's vertical axis may be within a range of 40° to 70°, and in this case, the line connecting the first projection point P and the second projection point O points toward the area of ​​the user's mouth or the end point of the mandibular base. Preferably, the included angle θ2 between the line connecting the first projection point P and the second projection point O and the user's vertical axis may be within the range of 42° to 65°, and in this case, the line connecting the first projection point P and the second projection point O can be more accurately directed toward the user's mouth area.

[0060] FIG. 19 is an exemplary schematic diagram of an earphone according to some other embodiments of the present disclosure.

[0061] To further explain the distribution positions of the first sound collecting hole 1191 and the second sound collecting hole 1192 on the earphone, the description will be made with reference to the coronal axis R of the user. If the angle between the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 and the coronal axis is too small, the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 can be regarded as pointing almost to the left or right side of the human head, and the effect of acquiring the user's voice when speaking by the microphone will be poor. If the angle between the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 and the coronal axis is too large, the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 will point directly to the user's head, and similarly, the effect of acquiring the user's voice when speaking by the microphone will be poor. In order to ensure that the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 can be directed as far forward as possible, the included angle between the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 and the coronal axis of the user (for example, the R axis in FIG. 18, the R axis being perpendicular to the sagittal plane (ST plane) of the user) may be -30° to -135°, thereby ensuring that the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 can be directed toward the front region of the human face. For more explanation on the included angle between the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 and the coronal axis of the user, please refer to FIG. 19 and its related explanation.

[0062] 19 shows the relative relationship between the user's head and the coronal axis and sagittal axis corresponding to the user, where the reference numeral 20 may represent the user's head, and the reference numeral 21 may represent the user's ear. As shown in FIG. 19, in some embodiments of the present specification, the coronal axis direction shown in FIG. 19 may be used as a reference, and the ray L3 and the ray L4 may represent the critical direction of the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192, that is, when the direction of the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 is between the ray L3 and the ray L4, the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 can be directed to the front side of the user's face. In some embodiments, the included angle α1 between the radial line L3 and the coronal axis R is about 30°, and the included angle α2 between the radial line L4 and the sagittal axis S is about 45°, and based on this, the included angle α3 between the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 and the coronal axis R of the user may be -30° to -135°. Preferably, the included angle between the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 and the coronal axis of the user may be -50° to -125°, and in this case, the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 faces the area near the left and right of the user's mouth. More preferably, the included angle between the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 and the coronal axis of the user may be -90° to -115°, and in this case, the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 faces the area of ​​the user's mouth. When the included angle between the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 and the coronal axis of the user is -90°, the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 is parallel to the sagittal plane of the user. Note that the angle here is determined with the clockwise direction being positive.

[0063] FIG. 20 is an exemplary schematic diagram of an earphone according to some other embodiments of the present disclosure.

[0064] As shown in FIG. 20, the first sound collection hole 1191 may have a first projection point P on the user's sagittal plane, and the second sound collection hole 1192 may have a second projection point O on the user's sagittal plane, and the included angle between a line connecting the first projection point P and the second projection point O and the major axis direction X of the shape of the projection of the sound generating unit 11 onto the sagittal plane may be expressed as θ3. When the earphone 10 is in a worn state, the position of the sound generating unit 11 relative to the ear can be considered not to change, and at this time, the included angle θ4 between the line connecting the fifth projection point Q' of the user's mandibular base end point onto the sagittal plane of the user and the centroid B of the projection of the user's ear canal onto the sagittal plane and the long axis direction X of the shape of the projection of the sound generating unit 11 onto the sagittal plane can be considered not to change much, and it may be understood that the closer the angle θ3 is to θ4, the better the directivity of the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 becomes. Based on this, in some embodiments, the sound collecting effect of the first sound collecting hole 1191 and the second sound collecting hole 1192 can be adjusted by controlling the included angle between the line connecting the first projection point P and the second projection point O and the long axis direction X of the shape of the projection of the sound generating unit 11 onto the sagittal plane.

[0065] As shown in FIG. 20 , the sagittal axis S and the vertical axis T may represent the critical direction of the line connecting the first projection point P and the second projection point O with respect to the long axis direction X of the shape of the projection of the sound generating unit 11 onto the sagittal plane. In other words, when the line connecting the first projection point P and the second projection point O is in the coordinate system ST, the sound collection effect of the first microphone and the second microphone collecting the sound when the user speaks can be ensured. Specifically, in some embodiments of the present specification, when the earphone 10 is worn, the included angle β1 between the long axis direction X and the sagittal axis S may be about 20°, the included angle β2 between the long axis direction X and the vertical axis T may be about 45°, and the included angle θ4 between the line connecting the fifth projection point Q' of the user's mandibular base endpoint onto the user's sagittal plane and the centroid B of the projection of the user's ear canal opening onto the sagittal plane and the long axis direction X of the shape of the projection of the sound generating unit 11 onto the sagittal plane may be 50° to 75°. Based on this, in some embodiments, when the negative direction of the long axis direction X shown in Fig. 20 is 0° and the counterclockwise direction is positive, the angle θ3 formed by the line connecting the first projection point P and the second projection point O and the long axis direction X of the shape of the projection of the voice generating unit 11 onto the sagittal plane may be 20° to 135°. Preferably, the angle θ3 formed by the line connecting the first projection point P and the second projection point O and the long axis direction X of the shape of the projection of the voice generating unit 11 onto the sagittal plane may be 45° to 70°, and in this case, the line connecting the first projection point P and the second projection point O can be more accurately oriented toward the area between the user's mouth and the end point of the mandibular base.

[0066] Fig. 21A is an exemplary schematic diagram of an earphone according to some other embodiments of the present specification. Fig. 21B is a schematic diagram of an included angle between a line connecting a first sound collecting hole and a second sound collecting hole and an outer surface of a sound generating unit according to some embodiments of the present specification.

[0067] As shown in Fig. 21A and Fig. 21B, in some embodiments, the included angle between the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 and the outer surface of the sound generating unit 11 may be expressed as θ5. In some embodiments, the outer surface of the sound generating unit 11 may be a plane, and in this case, the included angle between the line connecting the first sound collection hole and the second sound collection hole and the outer surface is the included angle between the line connecting the first sound collection hole and the second sound collection hole and the plane. In some embodiments, the outer surface of the sound generating unit 11 may be a curved surface, and the included angle between the line connecting the first sound collection hole and the second sound collection hole and the outer surface is the included angle between the line connecting the first sound collection hole and the second sound collection hole and the plane that is tangent to the curved surface of the outer surface. A case where the outer surface is a flat surface will be described as an example. In some embodiments, the outer surface of the sound generating unit 11 may be represented by four points M1, M2, M3, and M4 on the outer surface. In some embodiments, the first sound collection hole 1191 and the second sound collection hole 1192 may be located on the same side or different sides of the sound generating unit 11. For example, in some embodiments, the first sound collection hole 1191 and the second sound collection hole 1192 may both be located on the outer surface of the sound generating unit 11. Also, for example, in some embodiments, the first sound collection hole 1191 may be located on the front side of the sound generating unit 11, and the second sound collection hole 1192 may be located on the outer surface of the sound generating unit 11. Also, for example, in some embodiments, the first sound collection hole 1191 may be located on the lower side of the sound generating unit 11, and the second sound collection hole 1192 may be located on the outer surface of the sound generating unit 11.

[0068] 21B, the first sound collection hole 1191 has a projection point M5 on the outer surface M1M2M3M4, and the second sound collection hole 1192 has a projection point M6 on the outer surface M1M2M3M4. The included angle θ5 between the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 and the outer surface of the sound generating unit 11 may be the included angle between the line connecting the projection point M5 and the projection point M6 and the line connecting the first sound collection hole 1191 and the second sound collection hole 1192.

[0069] It may be understood that the included angle θ5 may reflect the relative positional relationship between the first sound collection hole 1191 and the second sound collection hole 1192 in the thickness direction of the sound generating unit 11, and may also reflect to some extent the directivity of the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 with respect to the user's mouth. In some embodiments, in order to ensure that the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 has good directivity and therefore the first sound collection hole 1191 and the second sound collection hole 1192 have a good sound collection effect, the included angle θ5 between the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 and the outer surface of the sound generating unit 11 may be controlled to be 0° to 60°, in which case the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 can be directed toward approximately the front area of ​​the user's face, thereby allowing the first microphone and the second microphone to have a good sound collection effect. In some embodiments, in order to improve the sound collection effect of the first microphone and the second microphone, the included angle θ5 between the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 and the outer surface of the sound generating unit 11 may be 10° to 50°, and at this time, the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 can be directed to the area approximately to the left and right of the user's mouth. Preferably, in order to further improve the sound collection effect of the first microphone and the second microphone, the included angle θ5 between the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 and the outer surface of the sound generating unit 11 may be 25° to 38°, and at this time, the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 can be directed to the user's mouth.

[0070] In some embodiments, in order to improve the sound collection effect of the first sound collection hole 1191 and the second sound collection hole 1192, the first sound collection hole 1191 and the second sound collection hole 1192 need to have a large area size. In some embodiments, the diameter of the first sound collection hole and the second sound collection hole may be larger than 0.8 mm. In some embodiments, in order to further improve the sound collection effect of the first sound collection hole 1191 and the second sound collection hole 1192, the diameter of the first sound collection hole and the second sound collection hole may be larger than 0.85 mm. In some embodiments, the diameter of the first sound collection hole and the second sound collection hole may be 0.9 mm.

[0071] In some embodiments, in order to improve the dustproof and waterproof effect of the first sound collection hole 1191 and the second sound collection hole 1192, the area dimensions of the first sound collection hole 1191 and the second sound collection hole 1192 should not be too large. Based on this, in some embodiments, in order to simultaneously ensure the sound collection effect and the dustproof and waterproof performance of the first sound collection hole 1191 and the second sound collection hole 1192, the diameter of the first sound collection hole 1191 and the second sound collection hole 1192 may be 0.8 mm to 3 mm. Exemplarily, in some embodiments, in order to further improve the dustproof and waterproof performance of the first sound collection hole 1191 and the second sound collection hole 1192, the diameter of the first sound collection hole 1191 and the second sound collection hole 1192 may be 0.8 mm to 2.5 mm. Preferably, in order to further improve the sound collection effect and dustproof and waterproof performance of the first sound collection hole 1191 and the second sound collection hole 1192, the diameter of the first sound collection hole 1191 and the second sound collection hole 1192 may be 0.85 mm to 1.5 mm. In this specification, the first sound collection hole 1191 and the second sound collection hole 1192 may have the same or different hole diameters. When the shape of the first sound collection hole 1191 and / or the second sound collection hole 1192 is irregular, the diameter may be understood as the maximum inner diameter or the average inner diameter.

[0072] In some embodiments, if the depth of the first sound collecting hole 1191 and the second sound collecting hole 1192 is too large (e.g., greater than 8 mm), the sound may be lost in the process of being transmitted to the first microphone and the second microphone, and the mid-high frequency sound may become sharper. Therefore, in order to ensure the sound collecting effect of the first sound collecting hole 1191 and the second sound collecting hole 1192, the depth of the first sound collecting hole 1191 and / or the second sound collecting hole 1192 may be less than 4 mm. In some embodiments, the depth of the first sound collecting hole 1191 and the second sound collecting hole 1192 may be the distance from the opening to the corresponding microphone. In some embodiments, when the first microphone and the second microphone are provided in close contact with the housing, the depth of the first sound collecting hole 1191 and the second sound collecting hole 1192 may be equal to the thickness of the housing. For example, in some embodiments, in order to further reduce sound loss during transmission to the first microphone and the second microphone and improve the sound collection effect of mid- to high-frequency sounds, the depths of the first sound collection hole 1191 and the second sound collection hole 1192 may both be less than 2.5 mm.

[0073] In some embodiments, the depths of the first sound collection hole 1191 and the second sound collection hole 1192 may be the same to maintain the sound collection effect of the first sound collection hole 1191 and the second sound collection hole 1192. If the depths of the first sound collection hole 1191 and the second sound collection hole 1192 do not match, some sound will propagate an extra distance, and the responses to noise of the first sound collection hole 1191 and the second sound collection hole 1192 will not match, which will affect the noise reduction effect and call quality of the earphone 10.

[0074] In some embodiments, a dustproof and waterproof mesh may be further provided on the first sound collection hole 1191 and the second sound collection hole 1192. The first sound collection hole 1191 and the second sound collection hole 1192 may be sealed by, for example, a silicone rubber sleeve and double-sided tape.

[0075] In some embodiments, by designing an adjustment algorithm corresponding to the earphone 10, the earphone 10 can obviously improve the low frequency sound at low volume and maintain the sound at high volume, thereby avoiding damage to the speaker caused by popping sounds. By setting the adjustment algorithm, the user can autonomously adjust the sound effect of the earphone.

[0076] FIG. 22 is an exemplary schematic diagram of an earphone according to some other embodiments of the present specification.

[0077] As shown in FIG. 22, in some embodiments, the sound generating unit 11 may further include at least one sound output hole (e.g., sound output hole 111a) and at least one decompression hole (e.g., decompression hole 111c), where the sound output hole 111a is provided on the inner surface of the sound generating unit 11, and the decompression hole 111c is provided on the lower surface of the sound generating unit 11. In some embodiments, the decompression hole 111c may further be located on any one of the upper surface, the front surface, the rear surface, and the outer surface of the sound generating unit. In some embodiments, in order to prevent the sound derived from the sound output hole 111a and the decompression hole 111c from generating echoes in the first sound collecting hole 1191 and the second sound collecting hole 1192, the distances between the first sound collecting hole 1191 and the decompression hole 111c and the sound output hole 111a must satisfy a certain relationship.

[0078] As shown in FIG. 22, in some embodiments, the distance between the first sound input hole 1191 and the decompression hole 111c may be represented as d1, and the distance between the first sound input hole 1191 and the sound output hole 111a may be represented as d2. In some embodiments, for the first sound input hole 1191 that mainly collects sound, in order to reduce interference with the first microphone of the speaker, the first sound input hole 1191 may be provided near an acoustic null (e.g., an area where sound leakage between the sound output hole 111a and the decompression hole 111c is canceled). Specifically, in some embodiments, in order to provide the first sound input hole 1191 near an acoustic null, the difference between d1 and d2 may be smaller than 10 mm. The smaller the difference between d1 and d2, the more the sound leakage between the sound output hole 111a and the decompression hole 111c is canceled, and in some embodiments, the difference between d1 and d2 may be smaller than 6 mm. Preferably, in order to further reduce the interference of the speaker to the first microphone, the difference between d1 and d2 may be less than 4 mm.

[0079] FIG. 23 is a schematic cross-sectional view of an exemplary configuration of a sound generating section of an earphone according to some other embodiments of the present specification.

[0080] As shown in Fig. 23, in some embodiments, a first acoustic resistance mesh 1193 may be provided at a first sound collection hole 1191, and a second acoustic resistance mesh 1194 may be provided at a second sound collection hole 1192. The first acoustic resistance mesh 1193 and the second acoustic resistance mesh 1194 may have a structure that has a certain acoustic resistance effect but does not completely block the propagation of sound, and in some embodiments, the first acoustic resistance mesh 1193 and / or the second acoustic resistance mesh 1194 may include a gauze mesh and / or a steel mesh. In some embodiments, the first acoustic resistance mesh 1193 and the second acoustic resistance mesh 1194 may be fixed to the first sound collection hole 1191 and the second sound collection hole 1192, respectively, by double-sided tape or adhesive. In some embodiments, the first acoustically resistive mesh 1193 and the second acoustically resistive mesh 1194 can improve the waterproof and dustproof performance at the first sound collection hole 1191 and the second sound collection hole 1192.

[0081] As shown in Fig. 23, in some embodiments, the distance between the first acoustic resistance mesh 1193 and the outer surface of the housing of the sound generating unit 11 where the first acoustic resistance mesh 1193 is located may be represented as d3, and the distance between the second acoustic resistance mesh 1194 and the outer surface of the housing of the sound generating unit 11 where the second acoustic resistance mesh 1194 is located may be represented as d4. Note that in this specification, d3 and d4 may be the same or different. For example, when the distances d3 and d4 are the same, the propagation efficiency of the sound passing through the first sound collecting hole 1191 and the second sound collecting hole 1192 is almost the same, ensuring the sound collecting effect of the first microphone and the second microphone. Exemplarily, in some embodiments, the distance d3 between the first acoustic resistive mesh 1193 and the outer surface of the housing of the sound generating unit 11 may be 0.5 mm to 2 mm, and the distance d4 between the second acoustic resistive mesh 1194 and the outer surface of the housing of the sound generating unit 11 may be 0.5 mm to 2 mm. In some embodiments, the distance d3 between the first acoustic resistive mesh 1193 and the outer surface of the housing of the sound generating unit 11 may be 0.5 mm to 1.5 mm, and the distance d4 between the second acoustic resistive mesh 1194 and the outer surface of the housing of the sound generating unit 11 may be 0.5 mm to 1.5 mm.

[0082] In some embodiments, in order to make the frequency response of the audio received by the first microphone and the second microphone relatively flat and to improve the signal-to-noise ratio of the audio received by the first microphone and the second microphone, the first acoustic resistance mesh 1193 and the second acoustic resistance mesh 1194 need to have a certain acoustic resistance, for example an acoustic resistance greater than 45 Mrayls. For example, with an increase in the acoustic resistance of the first acoustic resistance mesh 1193 and the second acoustic resistance mesh 1194, the corresponding resonant frequency of the first microphone or the second microphone moves to a lower frequency, and the peak value of the resonant peak gradually becomes gentler. In addition, in order to ensure the sound propagation efficiency at the first sound collection hole 1191 and the second sound collection hole 1192 and guarantee the sound collection effect of the first microphone and the second microphone, the acoustic resistance values ​​of the first acoustic resistance mesh 1193 and the second acoustic resistance mesh 1194 should not be too large. Based on this, in some embodiments, in order to ensure the sound collection effect of the first sound collection hole 1191 and the second sound collection hole 1192, the acoustic resistance of the first acoustic resistance mesh 1193 and the second acoustic resistance mesh 1194 may be 45 Mrayls to 320 Mrayls. Preferably, the acoustic resistance of the first acoustic resistive mesh 1193 and the second acoustic resistive mesh 1194 may be 80 Mrayls to 260 Mrayls, in which case it can ensure that the frequency response of the sound received by the first microphone or the second microphone is relatively flat, the quality of the sound signal collected by the first microphone or the second microphone is relatively high, and the first microphone or the second microphone has a relatively high sensitivity to the sound signal. More preferably, the acoustic resistance of the first acoustic resistive mesh 1193 and the second acoustic resistive mesh 1194 may be 120 Mrayls to 200 Mrayls, in which case it can ensure that the first microphone or the second microphone has a high sensitivity to the sound signal, and the frequency response of the sound received by the first microphone or the second microphone is more flat, improving the quality of the sound signal collected by the first microphone or the second microphone.Here, the acoustic resistance of the first acoustic resistance mesh 1193 and the second acoustic resistance mesh 1194 may be measured using an ultrasonic echo measurement method, or may be determined from the product of the density of the acoustic resistance mesh and the speed of sound.

[0083] The denser the holes in the acoustic resistance mesh, the greater the acoustic resistance corresponding to the acoustic resistance mesh, and the more pronounced the suppression effect on the user's voice from the user's mouth becomes, and the smaller the intensity of the collected sound received by the microphone becomes. Based on this, the parameters (e.g., mesh density, hole size, thickness, etc.) of the first acoustic resistance mesh 1193 and the second acoustic resistance mesh 1194 may be designed so that the first acoustic resistance mesh 1193 and the second acoustic resistance mesh 1194 have a predetermined acoustic resistance range.

[0084] For example, in some embodiments, the first acoustically resistive mesh 1193 and / or the second acoustically resistive mesh 1194 may include a plurality of holes, and the hole diameter of each mesh may be within a range of 15 μm to 51 μm. Preferably, in some embodiments, in order to ensure the waterproof and dustproof performance of the first sound collection hole 1191 and the second sound collection hole 1192 while simultaneously achieving sound propagation efficiency, the hole diameter of each hole of the first acoustically resistive mesh 1193 and the second acoustically resistive mesh 1194 may be controlled to 18 μm to 44 μm.

[0085] In some embodiments, the aperture ratio of the first acoustic resistive mesh 1193 and / or the second acoustic resistive mesh 1194 may be in the range of 11% to 18%, where the term "aperture ratio" may be understood as the ratio of the hole area of ​​the acoustic resistive mesh to the total area of ​​the acoustic resistive mesh, and the larger the aperture ratio, the more holes there are in a unit area when the size of a single hole is constant, and the smaller the acoustic resistance of the acoustic resistive mesh. In some embodiments, the aperture ratio of the first acoustic resistive mesh 1193 and / or the second acoustic resistive mesh 1194 may be 11% to 18% in order to make the acoustic resistance of the first acoustic resistive mesh 1193 and / or the second acoustic resistive mesh 1194 45 Mrayls to 320 Mrayls. Similarly, in some embodiments, the thickness of the first acoustically resistive mesh 1193 and / or the second acoustically resistive mesh 1194 may be in the range of 55 μm to 108 μm so as to provide an acoustic resistance of the first acoustically resistive mesh 1193 and / or the second acoustically resistive mesh 1194 between 45 Mrayls and 320 Mrayls.

[0086] FIG. 24 is an exemplary schematic diagram of an earphone according to some other embodiments of the present disclosure.

[0087] As shown in Fig. 24, in some embodiments, when the earphone 10 is in a worn state, at least a part of the sound generating unit 11 may cover the antihelix region of the user (e.g., the triangular fossa, the superior crus of the antihelix, the inferior crus of the antihelix, or the position of the antihelix, the position of the sound generating unit 11C relative to the ear shown in Fig. 2). Similarly, in some embodiments, in order to ensure that the first microphone and the second microphone have a good sound collection effect, in this worn state, the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 may be directed toward the user's mouth.

[0088] In some embodiments, in order to improve the sound collection effect when the first microphone collects the sound emitted from the user's mouth, in a wearing state in which at least a part of the sound generating unit 11 covers the antihelix region of the user (hereinafter, abbreviated as the second wearing state), the first sound collecting hole 1191 may be located in a position close to the mouth of the earphone 10. As in the wearing method in which at least a part of the sound generating unit 11 is inserted into the cavity of the concha of the user, in order to facilitate subsequent signal processing, the wearing method of the earphone 10 also requires a certain interval between the first sound collecting hole 1191 and the second sound collecting hole 1192 when at least a part of the sound generating unit 11 covers the antihelix region of the user. In addition, when the earphone 10 is worn with at least a portion of the sound generating unit 11 covering the antihelix region of the user, at least a portion of the sound generating unit 11 abuts against the inner wall of the user's auricle (e.g., the inner contour 1014). Therefore, on the premise that the first sound collection hole 1191 is provided in a position close to the user's mouth and that there must be a certain distance between the first sound collection hole 1191 and the second sound collection hole 1192, the second sound collection hole 1192 may be close to the inner contour 1014. As a result, when sound waves generated by the user's speech or external sound waves are transmitted to the inner contour 1014, the inner contour 1014 may cause a reflection effect on the sound waves. In particular, within the frequency range of 3 kHz to 4 kHz, the sound received by the second microphone will be louder than the sound received by the first microphone, affecting the subsequent noise reduction and sound collection effects. Based on the above problem, in some embodiments, the noise reduction and sound collection effect of the earphone can be ensured by adjusting the distance between the first sound collection hole 1191 and the second sound collection hole 1192 and the distance between the second sound collection hole 1192 and the inner contour 1014 of the user's pinna. As shown in FIG. 24, when the earphone 10 is in the second wearing state, the first sound collection hole 1191 may have a first projection point P on the user's sagittal plane (for example, the TS plane shown in FIG. 24), and the second sound collection hole 1192 may have a second projection point O on the user's sagittal plane.In some embodiments, in order to more clearly explain the positional relationship between the first sound collection hole 1191, the second sound collection hole 1192 and the inner contour 1014 of the user's pinna, the distance between the first sound collection hole 1191 and the second sound collection hole 1192 may be represented by a first distance OP between a first projection point P of the first sound collection hole 1191 onto the sagittal plane and a second projection point O of the second sound collection hole 1192 onto the sagittal plane. In some embodiments, an extension of a line connecting a first projection point P of the first sound collection hole onto the sagittal plane of the user and a second projection point O of the second sound collection hole onto the sagittal plane and a projection of the inner contour 1014 of the user's pinna onto the sagittal plane may have an intersection point C, and the distance between the second sound collection hole 1192 and the inner contour 1014 of the pinna may be represented by a second distance OC between the second projection point O of the second sound collection hole 1192 onto the sagittal plane and the intersection point C. In some embodiments, in order to ensure that the first microphone and the second microphone of the earphone 10 have a good sound collection effect and a good noise reduction effect in the second wearing state, the ratio of the first distance OP between the first projection point P and the second projection point O to the second distance OC between the second projection point O and the intersection point C may be 1.8 to 4.4. In order to reduce the effect of the inner contour of the pinna on the second microphone, the distance between the second sound collection hole 1192 and the inner contour of the pinna is increased, and the distance between the first sound collection hole 1191 and the second sound collection hole 1192 is also increased, thereby making it easier to process subsequent signals, and preferably, the ratio of the first distance OP between the first projection point P and the second projection point O to the second distance OC between the second projection point O and the intersection point C may be 2.5 to 3.8. Preferably, when the wearing position of the earphone does not change, in order to further reduce the influence of the inner contour of the pinna on the second microphone, the distance between the second sound collection hole 1192 and the inner contour of the pinna is increased, and the distance between the first sound collection hole 1191 and the second sound collection hole 1192 is increased, thereby making it easier to process subsequent signals, and in some embodiments, the ratio of the first distance OP between the first projection point P and the second projection point O to the second distance OC between the second projection point O and the intersection point C may be 2.8 to 3.5.Considering the reduction of the effect of the inner contour of the pinna on the second microphone and the ease of subsequent signal processing, the distance between the second sound collection hole 1192 and the inner contour of the pinna may be further increased, and the distance between the first sound collection hole 1191 and the second sound collection hole 1192 may be further increased, and more preferably, the ratio of the first distance OP between the first projection point P and the second projection point O to the second distance OC between the second projection point O and the intersection point C may be 3.0 to 3.3.

[0089] In some embodiments, if the second sound collecting hole 1192 is close to the inner contour 1014 of the pinna, when the sound waves generated by the user's speech or the external sound waves are transmitted to the inner contour 1014 of the pinna, the inner contour 1014 of the pinna may cause a reflection effect on the sound waves, and the sound received by the second microphone will be louder than the sound received by the first microphone, especially in the frequency range of 3kHz to 8kHz, which will affect the subsequent noise reduction and sound collection effects. In addition, since the size of the sound generating unit 11 is limited, it is necessary to ensure that there is a large distance between the first sound collecting hole 1191 and the second sound collecting hole 1192. If the second sound collecting hole 1192 is far from the inner contour 1014 of the pinna, the distance between the first sound collecting hole 1191 and the second sound collecting hole 1192 will be small, which will affect the subsequent signal processing.

[0090] 25A-25D are schematic diagrams of corresponding frequency response curves for different distances between the second projection point O and the intersection point C according to some embodiments herein.

[0091] As shown in Fig. 25A, curves 2501 and 2502 are schematic diagrams of frequency response curves of the first microphone and the second microphone, respectively, when the first distance OP between the first projection point P and the second projection point O is 20 mm, and the second distance OC between the second projection point O and the intersection point C is 8 mm, and the second sound collection hole 1192 is located on the upper side of the sound generating unit 11. As can be seen from Fig. 25A, when the second sound collection hole 1192 is located on the upper side of the sound generating unit 11, and the second distance OC between the second projection point O and the intersection point C is 8 mm, the sound collection of the first microphone is better than that of the second microphone in the entire frequency band, and the responses to the sound of the first microphone and the second microphone are consistent, and the overall sound collection situation is relatively ideal.

[0092] As shown in FIG. 25B, curves 2503 and 2504 are schematic diagrams of frequency response curves of the first microphone and the second microphone when the first distance OP between the first projection point P and the second projection point O is 20 mm, and the second distance OC between the second projection point O and the intersection point C is 6 mm, and similar to the scene shown in FIG. 25A, the second sound collection hole 1192 is located on the upper side of the sound generation unit 11. As can be seen from FIG. 25B, when the second sound collection hole 1192 is located on the upper side of the sound generation unit 11 and the second distance OC between the second projection point O and the intersection point C is 6 mm, the difference in amplitude in the frequency band of 4k or more of the sound collection of the first microphone and the second microphone is small, which may affect the sound collection effect of the user's mouth by the entire microphone assembly, and may cause high-frequency parts to be missing.

[0093] As shown in FIG. 25C, curves 2505 and 2506 are schematic diagrams of frequency response curves of the first microphone and the second microphone when the first distance OP between the first projection point P and the second projection point O is 20 mm, and the second distance OC between the second projection point O and the intersection point C is 4 mm, and similar to the scenes shown in FIG. 25A and FIG. 25B, the second sound collection hole 1192 is located on the upper side of the sound generating unit 11. As can be seen from FIG. 25C, when the second sound collection hole 1192 is located on the upper side of the sound generating unit 11 and the second distance OC between the second projection point O and the intersection point C is 4 mm, the difference in sound collection amplitude in the 2.2k to 4k frequency band of the sound collection of the first microphone and the second microphone is also significantly reduced, and the frequency band of the sound that can be collected well becomes narrower.

[0094] As shown in FIG. 25D, curves 2507 and 2508 are schematic diagrams of frequency response curves of the first microphone and the second microphone when the first distance OP between the first projection point P and the second projection point O is 20 mm, and the second distance OC between the second projection point O and the intersection point C is 2 mm, and similar to the scenes shown in FIG. 25A to FIG. 25C, the second sound collection hole 1192 is located on the upper side of the sound generation unit 11. As can be seen from FIG. 25D, when the second sound collection hole 1192 is located on the upper side of the sound generation unit 11 and the second distance OC between the second projection point O and the intersection point C is 2 mm, there is almost no difference in the sound collection amplitude values ​​before and after the frequency band of 2.2 kHz or more of the sound collection of the first microphone and the second microphone, which seriously affects the sound collection effect of the user's mouth by the microphone assembly.

[0095] In some embodiments, in order to ensure that the first microphone and the second microphone have good sound collection and noise reduction effects, the distance between the second projection point O of the second sound collection hole 1192 on the sagittal plane and the intersection point C may be 2 mm to 10 mm. Exemplarily, in order to reduce the reflection effect of sound waves by the inner contour 1014 of the pinna and improve the sound collection effect of the first microphone and the second microphone, the distance from the second sound collection hole 1192 to the inner contour 1014 of the pinna may be increased, and in some embodiments, the distance between the second projection point O and the intersection point C may be 4 mm to 10 mm. In order to further reduce the reflection effect of sound waves by the inner contour 1014 of the pinna and further improve the sound collection effect of the first microphone and the second microphone, the distance from the second sound collection hole 1192 to the inner contour 1014 of the pinna may be further increased, and preferably, the distance between the second projection point O and the intersection point C may be 6 mm to 10 mm. When the second sound collection hole 1192 is located far from the inner contour 1014 of the pinna, the reflection of sound waves by the inner contour 1014 of the pinna has almost no effect on the second sound collection hole 1192, and more preferably, the distance between the second projection point O and the intersection point C may be 8 mm to 10 mm.

[0096] Note that the above explanation has been mainly given for the case where the second sound collection hole 1192 is located on the upper side of the sound generating unit 11. However, when the second sound collection hole 1192 is provided on the outer side of the sound generating unit 11, the second sound collection hole 1192 is basically on the same plane as the user's earlobe, so that the impact of the distance between the second projection point O and the intersection point C on the sound collection effect of the second microphone is not significant. In this case, it is only necessary to ensure that the user's earlobe is not significantly higher than the position where the second sound collection hole 1192 is located.

[0097] Further, as shown in FIG. 24, in order to facilitate subsequent signal processing, in the second wearing state, the distance between the first sound collection hole 1191 and the user's mouth (see point Q in FIG. 24) is smaller than the distance between the second sound collection hole 1192 and the user's mouth. As shown in FIG. 24, when the earphone 10 is in the second wearing state, the first sound collection hole 1191 may have a first projection point P on the user's sagittal plane (for example, the TS plane shown in FIG. 24), the second sound collection hole 1192 may have a second projection point O on the user's sagittal plane, and the third projection point Q represents the projection of the user's mouth (for example, lips) onto the user's sagittal plane, and the user's mouth has a third projection point Q on the user's sagittal plane, and the distance between PQ is smaller than the distance between OQ.

[0098] In some embodiments, a line connecting the first projection point P of the first sound collecting hole 1191 onto the sagittal plane of the user and the second projection point O of the second sound collecting hole 1192 onto the sagittal plane is directed approximately to the third projection point Q of the user's mouth onto the sagittal plane. In this way, a directivity algorithm can be constructed based on the voice received by the first microphone and the second microphone to make the received user voice clearer. In some embodiments, a line PQ connecting the first projection point P and the third projection point Q may form a certain angle with a line OQ connecting the second projection point O and the third projection point Q. In order to ensure the directivity of the first sound collecting hole 1191 and the second sound collecting hole 1192, the included angle between PQ and OQ may be smaller than 30°. In some embodiments, the included angle between PQ and OQ may be 0° to 25°. Preferably, the angle between PQ and OQ may be 5° to 20°. Exemplarily, in some embodiments, the angle between PQ and OQ may be 0°, 3°, 9°, or 15°, etc.

[0099] If the distance between the first sound collection hole 1191 and the second sound collection hole 1192 is too small, the difficulty of processing low-frequency signals increases (mainly because the phase difference of low-frequency signals is small), making it difficult to realize accurate calculations, so the distance between the first sound collection hole 1191 and the second sound collection hole 1192 should also not be too small. For the distance between the first sound collection hole 1191 and the second sound collection hole 1192, please refer to other parts of this specification, such as Fig. 7 and the corresponding contents, and a description thereof will be omitted here.

[0100] FIG. 26 is an exemplary schematic diagram of an earphone according to some other embodiments of the present disclosure.

[0101] As shown in FIG. 26, when the earphone 10 is in the second wearing state, the end point of the base of the user's mandible may have a fifth projection point Q' on the user's sagittal plane, the centroid of the projection of the user's ear canal opening onto the sagittal plane (for example, the dotted area 1015 in FIG. 26) is B, and the line connecting the fifth projection point Q' and the centroid B of the projection of the user's ear canal opening onto the sagittal plane may reflect to some extent the relative positional relationship between the sound generating unit 11 and the end point of the base of the user's mandible.

[0102] 26, the first sound collection hole 1191 may have a first projection point P on the sagittal plane of the user, and the second sound collection hole 1192 may have a second projection point O on the sagittal plane of the user. In some embodiments, in order for the first sound collection hole 1191 and the second sound collection hole 1192 to have good directivity, that is, for the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 to face the area between the user's mouth and the end point of the mandibular base, the included angle θ6 between the line connecting the first projection point P and the second projection point O and the line connecting the fifth projection point Q' and the centroid B of the projection of the user's ear canal opening onto the sagittal plane may be 45° or less. In some embodiments, when the earphone 10 is in the second wearing state, the included angle θ6 between the line connecting the first projection point P and the second projection point O and the line connecting the fifth projection point Q' and the centroid B of the projection of the user's ear canal opening onto the sagittal plane may be 6° to 35°, and at this time, the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 can be directed to the area near the user's mouth. Preferably, the included angle θ6 between the line connecting the first projection point P and the second projection point O and the line connecting the fifth projection point Q' and the centroid B of the projection of the user's ear canal opening onto the sagittal plane may be 10° to 25°, and at this time, the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 can be directed more accurately to the user's mouth.

[0103] 26, the sagittal axis S and the vertical axis T may represent the critical direction of the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192, in other words, in some embodiments of the present specification, in order to ensure the sound collecting effect of the first microphone and the second microphone collecting the sound when the user speaks, the direction of the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 may be between the sagittal axis S and the vertical axis T. The line connecting the first projection point P and the second projection point O may form a certain included angle θ7 with the vertical axis of the user. The included angle θ7 may reflect the directivity of the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192, and based on this, in some embodiments, in order to ensure the sound collecting effect of the first sound collecting hole 1191 and the second sound collecting hole 1192, the included angle θ7 between the line connecting the first projection point P and the second projection point O and the vertical axis of the user may be within a range of 20° to 80°, and at this time, the line connecting the first projection point P and the second projection point O faces the area close to the mouth or the bottom of the mandible of the user. Preferably, the included angle θ7 between the line connecting the first projection point P and the second projection point O and the vertical axis of the user may be within a range of 40° to 70°, and at this time, the line connecting the first projection point P and the second projection point O faces the area of ​​the mouth or the bottom of the mandible of the user. Preferably, the included angle θ7 between the line connecting the first projection point P and the second projection point O and the user's vertical axis may be in the range of 42° to 65°, and in this case, the line connecting the first projection point P and the second projection point O can be more accurately directed toward the user's mouth area.

[0104] FIG. 27 is an exemplary schematic diagram of an earphone according to some other embodiments of the present disclosure.

[0105] 27, the projection of the sound generating unit 11 onto the sagittal plane may include a long axis direction X and a short axis direction Y, where the long axis direction X may be the extension direction of the length of the sound generating unit 11, and the short axis direction Y may be the extension direction of the height (or width) of the sound generating unit 11. When the earphone 10 is in the second wearing state, the first sound collecting hole 1191 may have a first projection point P on the sagittal plane of the user, and the second sound collecting hole 1192 may have a second projection point O on the sagittal plane of the user, and the included angle between the line connecting the first projection point P and the second projection point O and the long axis direction X of the shape of the projection of the sound generating unit 11 onto the sagittal plane may be expressed as θ8. In some embodiments, the sound collection effect of the first sound collection hole 1191 and the second sound collection hole 1192 can be controlled by controlling the included angle between the line connecting the first projection point P and the second projection point O and the long axis direction X of the shape of the projection of the sound generating unit 11 onto the sagittal plane.

[0106] As shown in Fig. 27, the sagittal axis S and the vertical axis T may represent the critical direction of the line connecting the first projection point P and the second projection point O with respect to the long axis direction X of the shape of the projection of the voice generating unit 11 onto the sagittal plane. In other words, in some embodiments of the present specification, the direction of the line connecting the first projection point P and the second projection point O may be between the sagittal axis S and the vertical axis T in order to ensure the sound collection effect of the first microphone and the second microphone collecting the voice when the user speaks. In some embodiments, the negative direction of the long axis direction X shown in Fig. 27 may be 0°, and the counterclockwise direction may be positive, and the angle formed by the line connecting the first projection point P and the second projection point O and the long axis direction X of the shape of the projection of the voice generating unit 11 onto the sagittal plane may be represented. Specifically, in some embodiments of the present specification, in order for the first microphone and the second microphone to have a good sound collection effect, the angle θ8 formed by the line connecting the first projection point P and the second projection point O and the major axis direction X of the shape of the projection of the sound generating unit 11 onto the sagittal plane may be −45° to 45°. Preferably, the angle θ8 formed by the line connecting the first projection point P and the second projection point O and the major axis direction X of the shape of the projection of the sound generating unit 11 onto the sagittal plane may be −25° to 30°, and in this case, the line connecting the first projection point P and the second projection point O can be oriented toward a region near the region between the user's mouth and the end point of the mandibular base. More preferably, the angle θ8 between the line connecting the first projection point P and the second projection point O and the long axis direction X of the shape of the projection of the sound generating unit 11 onto the sagittal plane may be -20° to 25°, in which case the line connecting the first projection point P and the second projection point O can be more accurately directed to the area between the user's mouth and the end point of the mandibular base. Note that in some embodiments, the earphone may further be in the wearing state shown in FIG. 28A, in which case the upper or lower surface of the sound generating unit is substantially parallel to the horizontal direction, and in which case the angle between the line connecting the first projection point P and the second projection point O and the long axis direction X of the shape of the projection of the sound generating unit 11 onto the sagittal plane may be 0° to 90°.

[0107] Similar to the wearing method in which at least a part of the sound generating unit 11 is inserted into the user's concha cavity, in some embodiments, the wearing method of the earphone 10 is such that when at least a part of the sound generating unit 11 covers the user's antihelical region, in order to ensure that the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 has good directivity, the included angle between the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 and the user's coronal axis (for example, the R axis in Figure 27, where the R axis is perpendicular to the user's sagittal plane (ST plane)) may be -30° to -135°. Preferably, the included angle between the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 and the coronal axis of the user may be -50° to -125°, in which case the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 faces the area near the left and right of the user's mouth. More preferably, the included angle between the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 and the coronal axis of the user may be -90° to -115°, in which case the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 faces the area of ​​the user's mouth. When the included angle between the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 and the user's coronal axis is -90°, the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 is parallel to the user's sagittal plane.

[0108] In some embodiments, when the earphone 10 is in the second wearing state, a coordinate system may be established with the long axis direction X, the short axis direction Y, and the thickness direction Z of the sound generating unit 11, and the relative positions of the first sound collecting hole 1191 and / or the second sound collecting hole 1192 with respect to the sound generating unit 11 may be represented by coordinates in the coordinate system. For example, the distance from the first sound collecting hole 1191 and / or the second sound collecting hole 1192 to the inner surface of the sound generating unit 11 may be represented by a Z value in the coordinate system, the distance from the first sound collecting hole 1191 and / or the second sound collecting hole 1192 to the front side surface of the sound generating unit 11 may be represented by an X value in the coordinate system, and the distance from the first sound collecting hole 1191 and / or the second sound collecting hole 1192 to the lower side surface of the sound generating unit 11 may be represented by a Y value in the coordinate system. In some embodiments, a larger value of Z in the coordinate system may indicate that the first sound collection hole 1191 is farther away from the inner surface of the sound generating unit 11, a larger value of X may indicate that the first sound collection hole 1191 is farther away from the front surface of the sound generating unit 11, and a larger value of Y may indicate that the first sound collection hole 1191 is farther away from the lower surface of the sound generating unit 11.

[0109] Similar to the wearing manner in which at least a part of the sound generating unit 11 is inserted into the user's concha cavity, in some embodiments, when the earphone 10 is in the second wearing manner, in order for the first microphone to have a good sound collection effect, the ratio of the distance in the long axis direction X between the first projection point P of the first sound collecting hole 1191 on the sagittal plane and the projection of the front side of the sound generating unit 11 on the sagittal plane to the dimension along the long axis direction X of the projection of the sound generating unit 11 on the sagittal plane may be 0.75 or less, that is, when the sound generating unit 11 is divided into four equal parts along the long axis direction X, the first projection point P is located in the area of ​​X≦3. In order to improve the sound collection effect of the first microphone by bringing the first sound collection hole 1191 closer to the user's mouth, preferably, the ratio of the distance in the long axis direction X between the first projection point P of the first sound collection hole 1191 on the sagittal plane and the projection of the front side surface of the sound generating unit 11 on the sagittal plane to the dimension along the long axis direction X of the projection of the sound generating unit 11 on the sagittal plane may be 0.5 or less. More preferably, in order to improve the sound collection effect of the first microphone by bringing the first sound collection hole 1191 closer to the user's mouth, the ratio of the distance in the long axis direction X between the first projection point P of the first sound collection hole 1191 on the sagittal plane and the projection of the front side surface of the sound generating unit 11 on the sagittal plane to the dimension along the long axis direction X of the projection of the sound generating unit 11 on the sagittal plane may be 0.3 or less. More preferably, in order to bring the first sound collection hole 1191 closer to the user's mouth and improve the sound collection effect of the first microphone, the ratio of the distance in the long axis direction X between the first projection point P of the first sound collection hole 1191 on the sagittal plane and the projection of the front side of the sound generating unit 11 on the sagittal plane to the dimension along the long axis direction X of the projection of the sound generating unit 11 on the sagittal plane may be 0.2 or less. By providing the first sound collection hole 1191 at a position close to the front side of the sound generating unit, the position of the second sound collection hole 1192 has more options, and it can be ensured that the second sound collection hole can maintain a specific distance from the first sound collection hole and that the second sound collection hole is as far away from the antihelix as possible. Based on the above considerations, more preferably, the ratio of the distance in the long axis direction X between the first projection point P of the first sound collection hole 1191 onto the sagittal plane and the projection of the front side of the sound generating unit 11 onto the sagittal plane to the dimension along the long axis direction X of the projection of the sound generating unit 11 onto the sagittal plane may be 0.1 or less.More preferably, in some embodiments, the first sound collection hole 1191 may further be located on the front side of the sound generating unit 11, in which case the first sound collection hole 1191 is closer to the user's mouth in the horizontal direction, and the sound collection effect of the first microphone is better.

[0110] In some embodiments, in order for the first microphone to have a good sound collection effect, the ratio of the distance in the short axis direction Y between the first projection point P of the first sound collection hole 1191 on the sagittal plane and the projection of the lower surface of the sound generating unit 11 on the sagittal plane to the dimension along the short axis direction Y of the projection of the sound generating unit 11 on the sagittal plane may be 0.5 or less, that is, when the sound generating unit is divided into four equal parts along the short axis direction Y, the first projection point P is located in a region of Y≦2. More preferably, in order to bring the first sound collection hole 1191 closer to the user's mouth and improve the sound collection effect of the first microphone, in some embodiments, the ratio of the distance in the short axis direction Y between the first projection point P of the first sound collection hole 1191 on the sagittal plane and the projection of the lower surface of the sound generating unit 11 on the sagittal plane to the dimension along the short axis direction Y of the projection of the sound generating unit 11 on the sagittal plane may be 0.4 or less. Preferably, the ratio of the distance in the short axis direction Y between the first projection point P of the first sound collection hole 1191 on the sagittal plane and the projection of the lower surface of the sound generating unit 11 on the sagittal plane to the dimension along the short axis direction Y of the projection of the sound generating unit 11 on the sagittal plane may be 0.3 or less, and by providing the first sound collection hole 1191 at a position close to the lower surface of the sound generating unit, it is possible to ensure that the position of the second sound collection hole 1192 has more options, that the second sound collection hole can maintain a specific distance from the first sound collection hole, and that the line connecting the first sound collection hole and the second sound collection hole can be more accurately directed toward the user's mouth. Based on the above idea, more preferably, the ratio of the distance in the short axis direction Y between the first projection point P of the first sound collection hole 1191 on the sagittal plane and the projection of the lower surface of the sound generating unit 11 on the sagittal plane to the dimension along the short axis direction Y of the projection of the sound generating unit 11 on the sagittal plane may be 0.1 or less. More preferably, the first sound collection hole 1191 may be located on the lower surface of the sound generating unit 11. In this case, the first sound collection hole 1191 is closer to the user's mouth in the vertical direction, and the sound collection effect of the first microphone is better.

[0111] Similar to the wearing method in which at least a part of the sound generating unit 11 is inserted into the user's concha cavity, in some embodiments, the wearing method of the earphone 10 may be such that, when at least a part of the sound generating unit 11 covers the antihelix region of the user, the first sound collecting hole 1191 is located on the lower surface or front surface of the sound generating unit 11. In some embodiments, if the first sound emitting hole 1191 is too close to the inner surface of the sound generating unit 11 (e.g., smaller than 2 mm), not only may the first sound collecting hole 1191 be blocked by the user's ear during wearing, but the first microphone may also collect noise caused by friction between the user's ear and the sound generating unit 11; on the other hand, if the first sound collecting hole 1191 is located on the lower surface or front surface of the sound generating unit 11, the greater the distance between the first sound collecting hole 1191 and the inner surface of the sound generating unit 11, the smaller the volume of the sound from the user's mouth received by the first sound collecting hole 1191. Therefore, in some embodiments, in order to simultaneously ensure the sound collection effect of the first sound collection hole 1191 and the volume of the sound from the user's mouth, the ratio of the distance in the thickness direction Z of the sound generating unit 11 between the first sound collection hole 1191 and the inner surface of the sound generating unit 11 to the dimension of the sound generating unit 11 along the thickness direction Z may be 0.25 to 0.7. For example, in some embodiments, the ratio of the distance in the thickness direction Z of the sound generating unit 11 between the first sound collection hole 1191 and the inner surface of the sound generating unit 11 to the dimension of the sound generating unit 11 along the thickness direction Z may be 0.25 to 0.65, and here, by locating the first sound collection hole 1191 at a position relatively far from the inner surface of the sound generating unit 11, the influence of noise due to friction between the sound generating unit 11 and the ear can be reduced, and here, by reducing the distance from the first sound collection hole 1191 to the outer surface of the sound generating unit 11, the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 can be directed toward the user's mouth. Preferably, the ratio of the distance in the thickness direction Z of the sound generating unit 11 between the first sound collection hole 1191 and the inner surface of the sound generating unit 11 to the dimension of the sound generating unit 11 along the thickness direction Z may be 0.3 to 0.65, and here, by further reducing the distance from the first sound collection hole 1191 to the outer surface of the sound generating unit 11, the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 can be more accurately directed toward the user's mouth.

[0112] As shown in FIG. 27, in some embodiments, the projection (or the extension of the projection) of the front side of the sound generating unit 11 onto the sagittal plane of the user may have an intersection point G with the projection (or the extension of the projection) of the lower side of the sound generating unit 11 onto the sagittal plane of the user, and the greater the distance between the first projection point P of the first sound collecting hole 1191 onto the sagittal plane and the intersection point G, the greater the distance between the first projection point P and the user's mouth, which indicates that the sound collecting effect of the first microphone is poor. Based on this, in some embodiments, in order to ensure the sound collecting effect of the first microphone, the distance between the first projection point P and the intersection point G may be 5 mm or less. In some embodiments, the distance between the first projection point and the fourth projection point may be 3 mm or less. In order to improve the sound collection effect of the first microphone, the first sound collection hole 1191 may be provided at a position closer to the user's mouth of the voice generating unit 11, and in some embodiments, in order to further improve the sound collection effect of the first microphone, the distance between the first projection point and the fourth projection point may be 1 mm or less, where the first sound collection hole 1191 is closer to the user's mouth.

[0113] Similar to the wearing method in which at least a part of the sound generating unit 11 is inserted into the cavity of the concha of the user, in some embodiments, the wearing method of the earphone 10 may be such that, when at least a part of the sound generating unit 11 covers the antihelix region of the user, the second sound collection hole 1192 may be provided on the side of the sound generating unit 11 that does not form an auxiliary cavity with the antihelix of the user. For example, the second sound collection hole 1192 may be provided on the upper side US, lower side LS, outer side OS, etc. of the sound generating unit 11. In some embodiments, the second sound collection hole 1192 may be located on the outer side OS of the sound generating unit 11. In some embodiments, in order to avoid the distance between the second sound collecting hole 1192 and the user's auricle being too small to affect the sound collection quality of the earphone 10, the distance between the second sound collecting hole 1192 and the upper side surface US of the sound generating unit 11 may be 1 mm to 3 mm, and the distance between the second sound collecting hole 1192 and the rear side surface FE (also called the end surface FE of the sound generating unit 11) may be 8 mm to 12 mm. Preferably, in some embodiments, the distance between the second sound collecting hole 1192 and the upper side surface US may be 2 mm to 2.5 mm, and the distance between the second sound collecting hole 1192 and the rear side surface FE may be 9 mm to 10 mm. In some embodiments, the distance between the position of the second sound collecting hole 1192 and the upper side surface US may be 2.47 mm, and the distance between the second sound collecting hole 1192 and the rear side surface FE may be 9.96 mm. Similarly, in order to avoid the distance between the second sound collection hole 1192 and the first sound collection hole 1191 being too small, in some embodiments, the distance between the second sound collection hole 1192 and the front side surface CE may be 8 mm to 12 mm. Preferably, the distance between the second sound collection hole 1192 and the front side surface CE may be 8.5 mm to 12 mm. In some embodiments, the distance between the second sound collection hole 1192 and the lower side surface LS may be 4 mm to 8 mm. Preferably, the distance between the second sound collection hole 1192 and the lower side surface LS may be 6 mm to 8 mm. Note that in this specification, the distance from the second sound collection hole 1192 to the upper side surface, the front side surface, the rear side surface, and the lower side surface of the sound generating unit 11 may be the distance from the center of the opening of the second sound collection hole 1192 on the outer surface of the housing of the sound generating unit 11 to the upper side surface, the front side surface, the rear side surface, and the lower side surface of the sound generating unit 11.When the side surface (e.g., upper side surface, front side surface, rear side surface, lower side surface) of the sound generating unit 11 is flat, the distance may be the distance from the center of the opening of the second sound collection hole 1192 on the outer surface of the housing of the sound generating unit 11 to the flat surface. When the side surface of the sound generating unit 11 is curved, the distance may be the distance from the center of the opening of the second sound collection hole 1192 on the outer surface of the housing of the sound generating unit 11 to a tangent plane corresponding to the curved surface.

[0114] Fig. 28A is an exemplary schematic diagram of an earphone according to some other embodiments of the present specification. Fig. 28B is a schematic diagram of an included angle between a line connecting a first sound collecting hole and a second sound collecting hole and an outer surface of a sound generating unit according to some embodiments of the present specification.

[0115] As shown in Fig. 28A and Fig. 28B, in some embodiments, when the earphone 10 is used in the second wearing manner, the included angle between the line connecting the first sound collecting hole 1191 and the second sound collecting hole 1192 and the outer surface of the sound generating unit 11 may be expressed as θ9. In some embodiments, the outer surface of the sound generating unit 11 may be a plane, and in this case, the included angle between the line connecting the first sound collecting hole and the second sound collecting hole and the outer surface is the included angle between the line connecting the first sound collecting hole and the second sound collecting hole and the plane. In some embodiments, the outer surface of the sound generating unit 11 may be a curved surface, and the included angle between the line connecting the first sound collecting hole and the second sound collecting hole and the outer surface is the included angle between the line connecting the first sound collecting hole and the second sound collecting hole and the plane that is in contact with the curved surface of the outer surface. A case where the outer surface is a flat surface will be described as an example. In some embodiments, the outer surface of the sound generating unit 11 may be represented by four points M1, M2, M3, and M4 on the outer surface. In some embodiments, the first sound collection hole 1191 and the second sound collection hole 1192 may be located on the same side or different sides of the sound generating unit 11. For example, the first sound collection hole 1191 and the second sound collection hole 1192 may both be located on the outer surface of the sound generating unit 11. Also, for example, the first sound collection hole 1191 may be located on the front side of the sound generating unit 11, and the second sound collection hole 1192 may be located on the outer surface of the sound generating unit 11. Also, for example, in some embodiments, the first sound collection hole 1191 may be located on the lower side of the sound generating unit 11, and the second sound collection hole 1192 may be located on the outer surface of the sound generating unit 11.

[0116] 28B, in some embodiments, the first sound collection hole 1191 has a projection point M7 on the outer surface M1M2M3M4, and the second sound collection hole 1192 may be located on the outer surface of the sound generating unit 11 (i.e., located within the plane M1M2M3M4). The included angle θ9 between the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 and the outer surface of the sound generating unit 11 may be an included angle formed by the line connecting the projection point M7 and the second sound collection hole 1192 and the line connecting the first sound collection hole 1191 and the second sound collection hole 1192. In some embodiments, when the second sound collection hole 1192 is not located on the outer surface of the sound generating unit 11, the second sound collection hole 1192 may have a projection point M8 (not shown) on the outer surface M1M2M3M4, and the included angle θ9 between the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 and the outer surface of the sound generating unit 11 may be the included angle formed by the line connecting the projection point M7 and the projection point M8 and the line connecting the first sound collection hole 1191 and the second sound collection hole 1192.

[0117] It may be understood that the included angle θ9 may reflect the relative positional relationship between the first sound collection hole 1191 and the second sound collection hole 1192 in the thickness direction of the sound generating unit 11, and may also reflect to some extent the directivity of the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 with respect to the user's mouth. Based on this, in some embodiments, in order to ensure that the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 has good directivity and therefore the first sound collection hole 1191 and the second sound collection hole 1192 have a good sound collection effect, the included angle θ9 between the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 and the outer surface of the sound generating unit 11 may be controlled to be 0° to 60°, in which case the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 can be directed approximately toward the front area of ​​the user's face, thereby allowing the first microphone and the second microphone to have a good sound collection effect. For example, in some embodiments, in order to improve the sound collection effect of the first microphone and the second microphone, the included angle θ9 between the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 and the outer surface of the voice generating unit 11 may be 10° to 40°, and at this time, the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 can be directed toward the area approximately to the left and right of the user's mouth. Preferably, in order to further improve the sound collection effect of the first microphone and the second microphone, the included angle θ9 between the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 and the outer surface of the voice generating unit 11 may be 25° to 38°, and at this time, the line connecting the first sound collection hole 1191 and the second sound collection hole 1192 can be directed toward the user's mouth.

[0118] For more details regarding the second wearing method, reference may be made to the contents described elsewhere in this specification (e.g., the contents regarding the wearing method in which at least a portion of the sound generating unit is not inserted into the user's concha) without contradiction, and description thereof will be omitted in this specification.

[0119] Although the basic concept has been described above, it is clear to those skilled in the art that the detailed disclosure above is merely given as an example and does not limit the present application. Although not explicitly described herein, those skilled in the art can make various changes, improvements and modifications to the present application. These changes, improvements and modifications are intended to be suggested by the present application and therefore still fall within the spirit and scope of the exemplary embodiments of the present application.

[0120] Also, certain terms are used herein to describe embodiments of the present application. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the present application. Thus, it is emphasized and understood that references to "one embodiment," "one embodiment," or "one alternative embodiment" more than once in various parts of this specification do not necessarily all refer to the same embodiment. Also, certain features, structures, or characteristics in one or more embodiments of the present application may be combined as appropriate.

[0121] Similarly, in the foregoing description of embodiments of the present application, various features may be grouped together in a single embodiment, figure, or description for the purpose of simplifying the description of the present disclosure and facilitating an understanding of one or more embodiments of the present invention. However, this method of disclosure should not be interpreted as reflecting an intention that the subject matter requires more features than are recited in each claim. Rather, an embodiment may include fewer than all features of a single embodiment disclosed above.

[0122] Finally, it should be understood that the embodiments described herein are merely illustrative of the principles of the embodiments of the present application. Other variations may be within the scope of the present application. Thus, by way of example, not limitation, alternative configurations of the embodiments of the present application may be considered consistent with the teachings of the present application. Accordingly, the embodiments of the present application are not limited to the embodiments explicitly introduced and described in the present application. The specific embodiments described in the present application are merely illustrative, and one or more technical features in the specific embodiments are optional or additional, and are not necessary technical features that constitute the inventive concept of the present application. In other words, the scope of protection of the present application covers the specific embodiments and is much larger than them. [Explanation of symbols]

[0123] 100 Ears 101 External auditory canal 102 Concha cavity 103 Concha navicular 104 Triangular fossa 105 Antihelix 106 Scaphoid fossa 107 Earrings 108 Earlobe 109 Helical foot 1013 Outer contour 1014 Inner Contour 10. Earphones 11 Sound generation section 12 Suspension structure 11A Installation position 11B Mounting position 11C Mounting position 401A Sound Source 401B Sound Source 402 Similar Cavity Structure 403 Leakage Structure 401A' Secondary sound source 401B' Secondary sound source 121 First Part 122 Second Part 1191 First Sound Collecting Hole 1192 Second Sound Collector Hole 1015 Dotted area 20 heads 21 Ear 111a Sound emission hole 111c Decompression hole 1193 First Acoustic Resistance Mesh 1194 Second Acoustic Resistance Mesh

Claims

1. A sound generating unit; an ear hook configured to attach the sound generating unit at a position near the ear canal so as not to block an ear canal opening, so that at least a part of the sound generating unit is inserted into the cavity of the concha; a microphone assembly including at least a first microphone and a second microphone, the first microphone or the second microphone being provided in the sound generating unit or the ear hook, and a first sound collecting hole and a second sound collecting hole corresponding to the first microphone and the second microphone, respectively, being formed in the sound generating unit or the ear hook; an extension of a line connecting a projection of the first sound collection hole onto a user's sagittal plane and a projection of the second sound collection hole onto the sagittal plane has an intersection with a projection of an antihelix onto the sagittal plane, a distance between the projection of the first sound collection hole onto the sagittal plane and a projection of the second sound collection hole onto the sagittal plane is a first distance, a distance between the projection of the second sound collection hole onto the sagittal plane and the intersection is a second distance, and a ratio of the first distance to the second distance is 1.8 to 4.

4.

2. The earphone according to claim 1 , wherein a ratio of the first distance to the second distance is between 2.5 and 3.

8.

3. The earphone according to claim 1 or 2, wherein the second distance is between 2 mm and 10 mm.

4. The earphone of claim 3 , wherein the second distance is between 6 mm and 10 mm.

5. The earphone according to claim 1 or 2, wherein the first distance is between 10 mm and 50 mm.

6. The earphone of claim 5 , wherein the first distance is between 25 mm and 30 mm.

7. The earphone described in any one of claims 1 to 6, wherein the earhook is hung between a user's auricle and head, a portion of the earhook adjacent to the sound generating unit extends toward the anterior outer surface of the auricle and is connected to the sound generating unit, the first sound collection hole is located in the portion of the earhook adjacent to the sound generating unit, and a minimum distance between a projection of the first sound collection hole onto the sagittal plane and a projection of a connection point between the sound generating unit and the portion of the earhook adjacent to the sound generating unit onto the sagittal plane is 4 mm or less.

8. The earphone described in any one of claims 1 to 6, wherein a shape of the projection of the sound generating unit onto the sagittal plane includes a long axis direction and a short axis direction, and a ratio of a distance in the long axis direction between the projection of the first sound collection hole onto the sagittal plane and the projection of the front side of the sound generating unit onto the sagittal plane to a dimension along the long axis direction of the projection of the sound generating unit onto the sagittal plane is 0.75 or less.

9. 9. The earphone according to claim 8, wherein a ratio of a distance in the minor axis direction between a projection of the first sound collection hole onto the sagittal plane and a projection of a lower surface of the sound generating unit onto the sagittal plane to a dimension along the minor axis direction of the projection of the sound generating unit onto the sagittal plane is 0.5 or less.

10. The earphone according to any one of claims 1 to 6, wherein a distance from the intersection of a projection of the front side of the sound generating unit onto the sagittal plane and a projection of the lower side of the sound generating unit onto the sagittal plane to a projection of the first sound collection hole onto the sagittal plane is less than 3 mm.

11. The earphone according to any one of claims 1 to 6, wherein the first sound collection hole is located on a lower surface or a front surface of the sound generating unit, and a ratio of a distance between the first sound collection hole and an inner surface of the sound generating unit in a thickness direction of the sound generating unit to a dimension of the sound generating unit along the thickness direction is 0.25 to 0.

4.

12. The earphone according to any one of claims 1 to 11, wherein the second sound collection hole is located on at least one of an upper surface, a lower surface, and an outer surface of the sound generating unit.

13. The earphone according to any one of claims 1 to 11, wherein the second sound collection hole is located on an outer surface of the sound generating unit, and a distance from the second sound collection hole to an upper surface of the sound generating unit is 1 mm to 3 mm.

14. The earphone according to claim 13, wherein a distance from the second sound collecting hole to a front side surface of the sound generating unit is 8 mm to 12 mm.

15. The earphone described in any one of claims 1 to 14, wherein an included angle between a line connecting a projection of the first sound collection hole onto the sagittal plane and a projection of the second sound collection hole onto the sagittal plane and a line connecting a centroid of a projection of the user's mandibular base endpoint onto the sagittal plane and a projection of the ear canal opening onto the sagittal plane is 45° or less.

16. The earphone according to any one of claims 1 to 15, wherein an included angle between a line connecting a projection of the first sound collection hole onto the sagittal plane and a projection of the second sound collection hole onto the sagittal plane and a vertical axis of a user is within a range of 40° to 70°.

17. The earphone according to any one of claims 1 to 16, wherein an included angle between a line connecting the first sound collecting hole and the second sound collecting hole and a coronal axis of a user is between -30° and -135°.

18. The earphone according to any one of claims 1 to 17, wherein an included angle between a line connecting the first sound collection hole and the second sound collection hole and an outer surface is between 0° and 60°.

19. The earphone according to any one of claims 1 to 18, wherein an included angle between a line connecting the projection of the first sound collection hole onto the sagittal plane and the projection of the second sound collection hole onto the sagittal plane and a long axis direction of the shape of the projection of the sound generating unit onto the sagittal plane is 20° to 135°.

20. The earphone according to any one of claims 1 to 19, wherein a diameter of the first sound collection hole or the second sound collection hole is greater than 0.8 mm, and / or a depth of the first sound collection hole or the second sound collection hole is smaller than 4 mm.

21. The earphone according to any one of claims 1 to 20, wherein an acoustic resistance mesh is provided in the first sound collection hole and the second sound collection hole, and the acoustic resistance of the acoustic resistance mesh is 45 Mrayls to 320 Mrayls.

22. An acoustic resistance mesh is provided in the first sound collection hole and the second sound collection hole, the acoustic resistance mesh includes a plurality of holes, and the acoustic resistance mesh includes: The pore size of the pores is in the range of 15 μm to 51 μm; The open area ratio of the acoustic resistive mesh is in the range of 11% to 18%; and The earphone according to any one of claims 1 to 21, wherein the thickness of the acoustically resistive mesh is in the range of 55 μm to 108 μm.

23. The earphone according to any one of claims 1 to 21, further comprising a sound output hole and a decompression hole, wherein a difference between a distance from the first sound collection hole to the sound output hole and a distance from the first sound collection hole to the decompression hole is less than 10 mm.

24. A sound generating unit; an ear hook configured to attach the sound generating unit at a position near the ear canal so as not to block an ear canal opening, such that at least a portion of the sound generating unit covers an antihelix region; a microphone assembly including at least a first microphone and a second microphone, the first microphone or the second microphone being provided in the sound generating unit or the ear hook, and a first sound collecting hole and a second sound collecting hole corresponding to the first microphone and the second microphone, respectively, being formed in the sound generating unit or the ear hook; an extension of a line connecting a projection of the first sound collection hole onto a user's sagittal plane and a projection of the second sound collection hole onto the sagittal plane has an intersection with a projection of an inner contour of the auricle onto the sagittal plane, a distance between the projection of the first sound collection hole onto the sagittal plane and a projection of the second sound collection hole onto the sagittal plane is a first distance, a distance between the projection of the second sound collection hole onto the sagittal plane and the intersection is a second distance, and a ratio of the first distance to the second distance is 1.8 to 4.

4.

25. The earphone of claim 24, wherein a ratio of the first distance to the second distance is between 2.5 and 3.

8.

26. The earphone according to claim 24 or 25, wherein the second distance is between 2 mm and 10 mm.

27. 27. The earphone of claim 26, wherein the second distance is between 6 mm and 10 mm.

28. The earphone according to claim 24 or 25, wherein the first distance is between 10 mm and 50 mm.

29. 29. The earphone of claim 28, wherein the first distance is between 25 mm and 30 mm.

30. The earphone described in any one of claims 24 to 29, wherein the earhook is hung between a user's auricle and head, a portion of the earhook adjacent to the sound generating unit extends toward the anterior outer surface of the auricle and is connected to the sound generating unit, the first sound collection hole is located in the portion of the earhook adjacent to the sound generating unit, and a minimum distance between a projection of the first sound collection hole onto the sagittal plane and a projection of a connection point between the sound generating unit and the portion of the earhook adjacent to the sound generating unit onto the sagittal plane is 4 mm or less.

31. The earphone described in any one of claims 24 to 29, wherein the shape of the projection of the sound generating unit onto the sagittal plane includes a long axis direction and a short axis direction, and the ratio of the distance in the long axis direction between the projection of the first sound collection hole onto the sagittal plane and the projection of the front side of the sound generating unit onto the sagittal plane to the dimension along the long axis direction of the projection of the sound generating unit onto the sagittal plane is 0.75 or less.

32. The earphone according to claim 31, wherein a ratio of a distance in the minor axis direction between a projection of the first sound collection hole onto the sagittal plane and a projection of a lower surface of the sound generating unit onto the sagittal plane to a dimension along the minor axis direction of the projection of the sound generating unit onto the sagittal plane is 0.5 or less.

33. The earphone described in any one of claims 24 to 29, wherein a distance from the intersection of a projection of the front side of the sound generating unit onto the sagittal plane and a projection of the lower side of the sound generating unit onto the sagittal plane to a projection of the first sound collection hole onto the sagittal plane is less than 3 mm.

34. The earphone described in any one of claims 24 to 29, wherein the first sound collection hole is located on a lower surface or a front surface of the sound generating unit, and a ratio of a distance between the first sound collection hole and an inner surface of the sound generating unit in a thickness direction of the sound generating unit to a dimension of the sound generating unit along the thickness direction is 0.25 to 0.

4.

35. The earphone according to any one of claims 24 to 34, wherein the second sound collection hole is located on at least one of an upper surface, a lower surface, and an outer surface of the sound generating unit.

36. The earphone according to any one of claims 24 to 34, wherein the second sound collection hole is located on an outer surface of the sound generating unit, and a distance from the second sound collection hole to an upper surface of the sound generating unit is 1 mm to 3 mm.

37. The earphone according to claim 36, wherein a distance from the second sound collecting hole to a front side surface of the sound generating unit is 8 mm to 12 mm.

38. The earphone described in any one of claims 24 to 37, wherein an included angle between a line connecting a projection of the first sound collection hole onto the sagittal plane and a projection of the second sound collection hole onto the sagittal plane and a line connecting a centroid of a projection of the user's mandibular base endpoint onto the sagittal plane and a projection of the ear canal opening onto the sagittal plane is 45° or less.

39. The earphone according to any one of claims 24 to 38, wherein an included angle between a line connecting a projection of the first sound collection hole onto the sagittal plane and a projection of the second sound collection hole onto the sagittal plane and a vertical axis of a user is within a range of 40° to 70°.

40. The earphone according to any one of claims 24 to 39, wherein an included angle between a line connecting the first sound collecting hole and the second sound collecting hole and a coronal axis of a user is between -30° and -135°.

41. The earphone according to any one of claims 24 to 40, wherein an included angle between a line connecting the first sound collection hole and the second sound collection hole and an outer surface is between 10° and 60°.

42. The earphone according to any one of claims 24 to 41, wherein an included angle between a line connecting the projection of the first sound collection hole onto the sagittal plane and the projection of the second sound collection hole onto the sagittal plane and a major axis direction of the shape of the projection of the sound generating unit onto the sagittal plane is 0° to 90°.

Images