Earphone

Abstract

The embodiment of the invention provides an earphone. The earphone comprises a sound production part, an ear hook and a microphone assembly, the ear hook is configured to wear the sound production part at a position near the ear canal but not blocking the ear canal, and at least part of the sound production part extends into the auricular conchae; the microphone assembly at least comprises a first microphone and a second microphone, the first microphone or the second microphone is arranged in the sound production part or the ear hook, and the sound production part or the ear hook is provided with a first sound receiving hole and a second sound receiving hole respectively corresponding to the first microphone and the second microphone; wherein the extension line of the connecting line of the projection of the first sound receiving hole on the sagittal plane of the user and the projection of the second sound receiving hole on the sagittal plane has an intersection point with the projection of the antihelix on the sagittal plane, and the distance between the projection of the first sound receiving hole on the sagittal plane and the projection of the second sound receiving hole on the sagittal plane is a first distance; the distance between the projection of the second sound receiving hole on the sagittal plane and the intersection point is a second distance, and the ratio of the first distance to the second distance is 1.8-4.4.

Description

A headset

[0001] Cross-references

[0002] This application claims priority to Chinese application No. 202211336918.4 filed on October 28, 2022, Chinese application No. 202223239628.6 filed on December 1, 2022, and PCT application No. PCT / CN2022 / 144339 filed on December 30, 2022, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of acoustic technology, and in particular to a headset. Background Art

[0004] With the development of acoustic output technology, acoustic devices (eg, headphones) have been widely used in people's daily lives. They can be used in conjunction with electronic devices such as mobile phones and computers to provide users with an auditory feast.

[0005] Typically, headphones are equipped with a microphone to pick up the user's voice. The microphone's sound pickup performance depends on its placement on the headphones. Improving the microphone's sound pickup performance while maintaining the sound quality of the headphones is an urgent problem to be solved.

[0006] Summary of the Invention

[0007] One embodiment of the present specification provides an earphone, comprising: a sound-emitting portion; an earhook, configured to allow the sound-emitting portion to be worn near the ear canal but not to block the ear canal opening, with at least a portion of the sound-emitting portion extending into the cavum concha; and a microphone assembly, comprising at least a first microphone and a second microphone, wherein the first microphone or the second microphone is disposed in the sound-emitting portion or the earhook, and the sound-emitting portion or the earhook is provided with a first sound receiving hole and a second sound receiving hole corresponding to the first microphone and the second microphone, respectively; wherein an extension line of a line connecting a projection of the first sound receiving hole on a user's sagittal plane and a projection of the second sound receiving hole on the sagittal plane intersects with a projection of the antihelix on the sagittal plane, a distance between the projection of the first sound receiving hole on the sagittal plane and the projection of the second sound receiving hole on the sagittal plane is a first distance, a distance between the projection of the second sound receiving hole on the sagittal plane and the intersection is a second distance, and a ratio of the first distance to the second distance is 1.8-4.4.

[0008] One of the embodiments of the present specification also provides an earphone, comprising: a sound-emitting part; and an ear hook, configured to fix the sound-emitting part at a position near the ear canal but not blocking the ear canal opening, wherein the sound-emitting part at least partially covers the antihelix area; a microphone assembly, comprising at least a first microphone and a second microphone, wherein the first microphone or the second microphone is arranged in the sound-emitting part or the ear hook, and the sound-emitting part or the ear hook is provided with a first sound receiving hole and a second sound receiving hole corresponding to the first microphone and the second microphone, respectively; wherein the extension line of the line connecting the projection of the first sound receiving hole on the user's sagittal plane and the projection of the second sound receiving hole on the sagittal plane has an intersection with the projection of the inner contour of the auricle on the sagittal plane, the distance between the projection of the first sound receiving hole on the sagittal plane and the projection of the second sound receiving hole on the sagittal plane is a first distance, the distance between the projection of the second sound receiving hole on the sagittal plane and the intersection is a second distance, and the ratio of the first distance to the second distance is 1.8-4.4. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present application will be further described in the form of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting, and in these embodiments, like numbers represent like structures, wherein:

[0010] FIG1 is a schematic diagram of an exemplary ear according to some embodiments of the present specification;

[0011] FIG2 is a schematic diagram of an exemplary wearing method of an earphone according to some embodiments of this specification;

[0012] FIG3 is a schematic diagram of wearing an earphone with the sound-emitting portion extending into the concha cavity according to some embodiments of this specification;

[0013] FIG4 is a schematic diagram of an acoustic model of a cavity-like structure according to some embodiments of this specification;

[0014] FIG5 is a schematic diagram of an exemplary structure of an earphone according to some embodiments of this specification;

[0015] FIG6 is a schematic diagram of an exemplary wearing method of an earphone according to some embodiments of this specification;

[0016] FIG7 is a schematic diagram of an exemplary wearing method of an earphone according to other embodiments of this specification;

[0017] FIG8 is a schematic diagram of a coordinate system established based on the long axis and short axis directions of a sound-producing part according to some embodiments of this specification;

[0018] FIG9 is a schematic diagram of sound reception curves when sound receiving holes are located at different positions according to some embodiments of this specification;

[0019] FIG10 is a schematic diagram of sound reception curves when sound receiving holes are located at different positions according to other embodiments of this specification;

[0020] FIG11 is a schematic diagram of sound reception curves when sound receiving holes are located at different positions according to other embodiments of this specification;

[0021] FIG12 is a schematic diagram of sound reception curves when sound receiving holes are located at different positions according to other embodiments of this specification;

[0022] FIG13 is a schematic diagram of sound reception curves when sound receiving holes are located at different positions according to other embodiments of this specification;

[0023] FIG14 is a schematic diagram of sound reception curves when sound receiving holes are located at different positions according to other embodiments of this specification;

[0024] FIG15A is a schematic diagram of an exemplary structure of an earphone according to other embodiments of this specification;

[0025] FIG15B is a schematic diagram of an exemplary structure of an earphone according to other embodiments of this specification;

[0026] FIG16A is a schematic diagram of an exemplary coordinate system established based on a vocal part according to other embodiments of this specification;

[0027] FIG16B is a schematic diagram of an exemplary coordinate system established based on a vocal part according to other embodiments of this specification;

[0028] FIG17 is a schematic diagram showing an exemplary positional relationship between a first sound receiving hole, a second sound receiving hole, and a user's mouth according to some embodiments of this specification;

[0029] FIG18 is a schematic diagram of an exemplary wearing method of an earphone according to other embodiments of this specification;

[0030] FIG19 is a schematic diagram of an exemplary wearing method of an earphone according to other embodiments of this specification;

[0031] FIG20 is a schematic diagram of an exemplary wearing method of an earphone according to other embodiments of this specification;

[0032] FIG21A is a schematic diagram of an exemplary wearing method of an earphone according to other embodiments of this specification;

[0033] FIG21B is a schematic diagram showing the angle between the line connecting the first sound receiving hole and the second sound receiving hole and the outer side surface of the sound-emitting portion according to some embodiments of this specification;

[0034] FIG22 is a schematic diagram of an exemplary structure of an earphone according to other embodiments of this specification;

[0035] FIG23 is a schematic diagram of an exemplary cross-sectional structure of a sound-emitting portion of an earphone according to other embodiments of this specification;

[0036] FIG24 is a schematic diagram of an exemplary wearing method of an earphone according to other embodiments of this specification;

[0037] FIG25A is a schematic diagram of a frequency response curve corresponding to a case where the distance between the second projection point O and the intersection point C is 8 mm according to some embodiments of this specification;

[0038] FIG25B is a schematic diagram of a frequency response curve corresponding to a case where the distance between the second projection point O and the intersection point C is 6 mm according to some embodiments of this specification;

[0039] FIG25C is a schematic diagram of a frequency response curve corresponding to a situation where the distance between the second projection point O and the intersection point C is 4 mm according to some embodiments of this specification;

[0040] FIG25D is a schematic diagram of a frequency response curve corresponding to a case where the distance between the second projection point O and the intersection point C is 2 mm according to some embodiments of this specification;

[0041] FIG26 is a schematic diagram of an exemplary wearing method of an earphone according to other embodiments of this specification;

[0042] FIG27 is a schematic diagram of an exemplary wearing method of an earphone according to other embodiments of this specification;

[0043] FIG28A is a schematic diagram of an exemplary wearing method of an earphone according to other embodiments of this specification;

[0044] FIG28B is a schematic diagram showing the angle between the line connecting the first sound receiving hole and the second sound receiving hole and the outer side surface of the sound-emitting portion according to some embodiments of this specification. DETAILED DESCRIPTION

[0045] To more clearly illustrate the technical solutions of the embodiments of this application, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are merely examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without inventive effort. Unless otherwise apparent from the context or otherwise noted, the same reference numerals in the figures represent the same structure or operation.

[0046] Figure 1 is a schematic diagram of an exemplary ear according to some embodiments of this specification. As shown in Figure 1, Figure 1 is a schematic diagram of an exemplary ear according to some embodiments of this application. Referring to Figure 1, the ear 100 may include the external auditory canal 101, the cavum concha 102, the cymba concha 103, the triangular fossa 104, the antihelix 105, the scaphoid 106, the helix 107, the earlobe 108, the crus helix 109, the outer contour 1013, and the inner contour 1014. It should be noted that for ease of description, in the embodiments of this specification, the crus 1011, the crus 1012, and the antihelix 105 are collectively referred to as the antihelix region. In some embodiments, one or more regions of the ear 100 can be used to support an acoustic device and achieve stable wearing of the acoustic device. In some embodiments, regions such as the external auditory canal 101, the cavum concha 102, the cymba concha 103, and the triangular fossa 104 have a certain depth and volume in three-dimensional space, which can be used to meet the wearing requirements of the acoustic device. For example, an acoustic device (e.g., an in-ear headphone) can be worn in the external auditory canal 101. In some embodiments, the acoustic device can be worn by utilizing other parts of the ear 100 other than the external auditory canal 101. For example, the acoustic device can be worn by utilizing the cymba concha 103, the triangular fossa 104, the antihelix 105, the scaphoid 106, or the helix 107, or a combination thereof. In some embodiments, to improve the comfort and reliability of the acoustic device when worn, the acoustic device can further utilize parts such as the user's earlobe 108. By utilizing other parts of the ear 100 other than the external auditory canal 101 to achieve wearing the acoustic device and sound transmission, the user's external auditory canal 101 can be "liberated." When a user wears the acoustic device (headphone), the acoustic device does not block the user's external auditory canal 101. The user can receive both sound from the acoustic device and sounds from the environment (e.g., horns, car bells, surrounding human voices, traffic signals, etc.), thereby reducing the probability of traffic accidents. In some embodiments, the acoustic device can be designed to be compatible with the ear 100 according to the structure of the ear 100, so that the sound-producing part of the acoustic device can be worn at different positions on the ear. For example, when the acoustic device is an earphone, the earphone can include a suspension structure (e.g., an ear hook) and a sound-producing part. The sound-producing part and the suspension structure are physically connected. The suspension structure can be compatible with the shape of the auricle to place the entire or partial structure of the ear sound-producing part in front of the crus helix 109 (e.g., area J surrounded by dotted lines in FIG1 ). For another example, when the user wears the earphone, the entire or partial structure of the sound-producing part can contact the upper part of the external auditory canal 101 (e.g., the location of one or more parts such as the crus helix 109, the cymba concha 103, the triangular fossa 104, the antihelix 105, the scaphoid 106, and the helix 107).For another example, when a user wears headphones, the entire or partial structure of the sound-producing part may be located in a cavity formed by one or more parts of the ear (for example, the cavum concha 102, the bacula concha 103, the fossa triangularis 104, etc.) (for example, the area M1 surrounded by dotted lines in Figure 1, which at least includes the bacula concha 103 and the fossa triangularis 104, and the area M2 which at least includes the cavum concha 102).

[0047] Different users may have individual differences, resulting in different shapes, sizes and other dimensional differences in their ears. For the sake of ease of description and understanding, unless otherwise specified, this manual will mainly use an ear model with a "standard" shape and size as a reference to further describe how the acoustic device in different embodiments is worn on the ear model. For example, a simulator containing a head and its (left and right) ears made based on 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 wearing an acoustic device, thereby presenting a scenario in which most users normally wear the acoustic device. Taking GRAS KEMAR as an example, the ear simulator can be any one of GRAS 45AC, GRAS 45BC, GRAS 45CC or GRAS 43AG. Taking HEAD Acoustics as an example, the ear simulator can be any one of HMS II.3, HMS II.3 LN, or HMS II.3LN HEC. It should be noted that the data range measured in the embodiments of this specification is based on the GRAS 45BC KEMAR, but it should be understood that there may be differences between different head models and ear models, and the relevant data range may fluctuate by ±10% when using other models. As an example only, the reference ear model can have the following relevant characteristics: the projection of the auricle on the sagittal plane in the vertical axis direction can be in the range of 55-65mm, and the projection of the auricle on the sagittal plane in the sagittal axis direction can be in the range of 45-55mm. The projection of the auricle on the sagittal plane refers to the projection of the edge of the auricle on the sagittal plane. The edge of the auricle is composed of at least the outer contour of the helix, the contour of the earlobe, the contour of the tragus, the intertragic notch, the antitragic cusp, and the annular notch. Therefore, in this application, descriptions such as "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 ear of the aforementioned simulator. Of course, considering the individual differences between different users, the structure, shape, size, thickness, etc. of one or more parts of the ear 100 may be designed differently according to ears of different shapes and sizes. These differentiated designs may be manifested in that the characteristic parameters of one or more parts of the acoustic device (for example, the sound-emitting part, ear hook, etc. described below) may have different ranges of values ​​to adapt to different ears.

[0048] It should be noted that in the fields of medicine and anatomy, three basic cross-sectional planes of the human body can be defined: the sagittal plane, the coronal plane, and the horizontal plane, as well as three basic axes: the sagittal axis, the coronal axis, and the vertical axis. The sagittal plane refers to a cross-sectional plane perpendicular to the ground along the front-to-back direction of the body, which divides the human body into left and right parts; the coronal plane refers to a cross-sectional plane perpendicular to the ground along the left-to-right direction of the body, which divides the human body into front and back parts; the horizontal plane refers to a cross-sectional plane parallel to the ground along the vertical direction of the body, which divides the human body into upper and lower parts. Accordingly, the sagittal axis refers to an axis along the front-to-back direction of the body and perpendicular to the coronal plane, the coronal axis refers to an axis along the left-to-right direction of the body and perpendicular to the sagittal plane, and the vertical axis refers to an axis along the vertical direction of the body and perpendicular to the horizontal plane. Furthermore, the anterior side of the ear described in this application refers to the side of the ear facing the human face along the sagittal axis. When the ear of the simulator is observed along the direction of the human coronal axis, a front profile diagram of the ear as shown in FIG1 can be obtained.

[0049] The description of the ear portion 100 is for illustrative purposes only and is not intended to limit the scope of this application. A person skilled in the art can make various changes and modifications based on the description of this application. For example, a portion of the structure of the acoustic device can shield part or all of the external auditory canal 101. Such changes and modifications are still within the scope of protection of this application.

[0050] Figure 2 is an exemplary wearing diagram of the earphones shown in some embodiments of this specification. As shown in Figure 2, the earphone 10 may include a sound-emitting portion 11 and a suspension structure 12. In some embodiments, the earphone 10 can wear the sound-emitting portion 11 on the user's body (for example, the head, neck or upper torso of the human body) through the suspension structure 12. In some embodiments, the suspension structure 12 can be an ear hook, and the sound-emitting portion 11 is connected to one end of the ear hook, and the ear hook can be set to a shape that matches the user's ear. For example, the ear hook can be an arc-shaped structure. In some embodiments, the suspension structure 12 can also be a clamping structure that matches the user's auricle so that the suspension structure 12 can be clamped at the user's auricle. In some embodiments, the suspension structure 12 can include but is not limited to ear hooks, elastic bands, etc., so that the earphone 10 can be better hung on the user to prevent the user from falling during use.

[0051] In some embodiments, the sound-emitting portion 11 can be worn on the user's body, and a speaker can be provided within the sound-emitting portion 11 to generate sound for input into the user's ear 100. In some embodiments, the earphones 10 can be combined with products such as glasses, headphones, head-mounted displays, and AR / VR helmets. In such cases, the sound-emitting portion 11 can be worn near the user's ear 100 by hanging or clamping. In some embodiments, the sound-emitting portion 11 can be annular, elliptical, polygonal (regular or irregular), U-shaped, V-shaped, or semicircular, so that the sound-emitting portion 11 can be directly attached to the user's ear 100.

[0052] 1 and 2 , in some embodiments, when the user wears the earphone 10, at least part of the sound-emitting portion 11 may be located in the area J in front of the tragus of the user's ear 100 shown in FIG1 or the anterior and lateral surface areas M1 and M2 of the auricle. The following will provide an exemplary description in combination with different wearing positions (11A, 11B, and 11C) of the sound-emitting portion 11. It should be noted that the anterior and lateral surface of the auricle mentioned in the embodiments of this specification refers to the side of the auricle away from the head along the coronal axis, and correspondingly, the posterior and medial surface of the auricle refers to the side of the auricle facing the human head along the coronal axis. In some embodiments, the sound-emitting portion 11A is located on the side of the user's ear 100 facing the human facial area along the sagittal axis, that is, the sound-emitting portion 11A is located in the human facial area J on the front side of the ear 100. Furthermore, a speaker is provided inside the shell of the sound-emitting portion 11A, and at least one sound outlet hole (not shown in FIG. 2 ) may be provided on the shell of the sound-emitting portion. The sound outlet hole may be located on the side wall of the shell of the sound-emitting portion facing or close to the external auditory canal 101 of the user, and the speaker may output sound to the external auditory canal 101 of the user through the sound outlet hole. In some embodiments, the speaker may include a diaphragm, and the chamber inside the shell of the sound-emitting portion 11 is divided into at least a front cavity and a rear cavity by the diaphragm. The sound outlet hole is acoustically coupled with the front cavity, and the vibration of the diaphragm drives the air in the front cavity to vibrate to produce air-conducted sound, and the air-conducted sound produced in the front cavity is transmitted to the outside through the sound outlet hole. In some embodiments, the shell of the sound-emitting portion 11 may also include one or more pressure relief holes, and the pressure relief holes may be located on the side wall of the shell adjacent to or opposite to the side wall where the sound outlet hole is located. The pressure relief holes are acoustically coupled with the rear cavity, and the vibration of the diaphragm also drives the air in the rear cavity to vibrate to produce air-conducted sound, and the air-conducted sound produced in the rear cavity is transmitted to the outside through the pressure relief holes. For example, in some embodiments, the speaker in the sound-emitting portion 11A can output sounds with a phase difference (e.g., opposite phases) through the sound outlet and the pressure relief hole. The sound outlet can be located on the side wall of the housing of the sound-emitting portion 11A facing the user's external auditory canal 101, and the pressure relief hole can be located on the side of the housing of the sound-emitting portion 11 facing away from the user's external auditory canal 101. In this case, the housing can act as a baffle, increasing the sound path difference between the sound outlet and the pressure relief hole and the external auditory canal 101, thereby increasing the sound intensity at the external auditory canal 101 while reducing the volume of far-field sound leakage. In some embodiments, the sound-emitting portion 11 can have a long axis direction X and a short axis direction Y that are perpendicular to the thickness direction Z and orthogonal to each other. Among them, the major axis direction X can be defined as the direction with the largest extension dimension in the shape of the two-dimensional projection surface of the sound-emitting part 11 (for example, the projection of the sound-emitting part 11 on the plane where its outer surface is located, or the projection on the sagittal plane) (for example, when the projection shape is a rectangle or an approximate rectangle, the major axis direction is the length direction of the rectangle or the approximate rectangle), and the minor axis direction Y can be defined as the direction perpendicular to the major axis direction X in the shape of the projection of the sound-emitting part 11 on the sagittal plane (for example, when the projection shape is a rectangle or an approximate rectangle, the minor axis direction is the width direction of the rectangle or the approximate rectangle).The thickness direction Z can be defined as a direction perpendicular to the two-dimensional projection plane, for example, consistent with the direction of the coronal axis, both pointing to the left and right directions of the body. In some embodiments, when the sound-emitting portion 11 is in a tilted state when worn, the major axis direction X and the minor axis direction Y are still parallel or approximately parallel to the sagittal plane, and the major axis direction X can have a certain angle with the direction of the sagittal axis, that is, the major axis direction X is also tilted accordingly, and the minor axis direction Y can have a certain angle with the direction of the vertical axis, that is, the minor axis direction Y is also tilted, as shown in the wearing condition of the sound-emitting portion 11B in Figure 2. In some embodiments, the entire or partial structure of the sound-emitting portion 11B can extend into the cavum concha, that is, the projection of the sound-emitting portion 11B on the sagittal plane overlaps with the projection of the cavum concha on the sagittal plane. For specific details about the sound-emitting portion 11B, please refer to the contents elsewhere in this specification, for example, Figure 3 and its corresponding specification contents. In some embodiments, the sound-emitting portion 11 may also be in a horizontal state or an approximately horizontal state when worn. As shown in the sound-emitting portion 11C of FIG2 , the long axis direction X may be consistent or approximately consistent with the direction of the sagittal axis, both pointing to the front-to-back direction of the body, and the short axis direction Y may be consistent or approximately consistent with the direction of the vertical axis, both pointing to the up-down direction of the body. It should be noted that, when worn, the sound-emitting portion 11C being in an approximately horizontal state may mean that the angle between the long axis direction X of the sound-emitting portion 11C shown in FIG2 and the sagittal axis is within a specific range (for example, not greater than 20°). In addition, the wearing position of the sound-emitting portion 11 is not limited to the sound-emitting portion 11A, the sound-emitting portion 11B, and the sound-emitting portion 11C shown in FIG2 , and it only needs to satisfy the area J, area M1, or area M2 shown in FIG1 . For example, the entire or partial structure of the sound-emitting portion 11 may be located in the area J surrounded by the dotted line in FIG1 . For another example, the entirety or a portion of the sound-producing part may contact one or more parts of the ear 100, such as the crus helix 109, the cymba concha 103, the triangular fossa 104, the antihelix 105, the scaphoid 106, and the helix 107. For another example, the entirety or a portion of the sound-producing part 11 may be located within a cavity formed by one or more parts of the ear 100 (e.g., the cavum concha 102, the cymba concha 103, the triangular fossa 104, etc.) (e.g., the region M1 enclosed by the dotted line in FIG. 1 , which includes at least the cymba concha 103 and the triangular fossa 104, and the region M2 which includes at least the cavum concha 102).

[0053] To improve the stability of the earphone 10 when worn, the earphone 10 may employ any one or a combination of the following approaches. First, at least a portion of the suspension structure 12 may be configured as a contoured structure that conforms to at least one of the posterior medial surface of the auricle or the head, thereby increasing the contact area between the suspension structure 12 and the ear and / or head, thereby increasing the resistance to the acoustic device 10 falling off the ear. Second, at least a portion of the suspension structure 12 may be configured as an elastic structure, allowing it to deform a certain amount when worn, thereby increasing the positive pressure exerted by the suspension structure 12 on the ear and / or head, thereby increasing the resistance to the earphone 10 falling off the ear. Third, at least a portion of the suspension structure 12 may be configured to abut against the ear and / or head when worn, generating a reaction force that presses against the ear, causing the sound-producing portion 11 to press against the anterior lateral surface of the auricle (e.g., regions M1 and M2 shown in FIG. 1 ), thereby increasing the resistance to the earphone 10 falling off the ear. Fourth, the sound-producing portion 11 and the suspension structure 12 are configured to clamp the antihelix and the cavum concha from both the anterior and posterior medial sides of the auricle when worn, thereby increasing resistance to the earphone 10 falling off the ear. Fifth, the sound-producing portion 11 or the structure connected thereto is configured to at least partially extend into cavities such as the cavum concha 102, the cymba concha 103, the triangular fossa 104, and the scaphoid 106, thereby increasing resistance to the earphone 10 falling off the ear.

[0054] For example, with reference to FIG3 , when worn, the end FE (also referred to as the free end) of the sound-emitting portion 11 can extend into the cavum concha. Optionally, the sound-emitting portion 11 and the suspension structure 12 can be configured to jointly clamp the ear region corresponding to the cavum concha from both the front and rear sides of the ear region, thereby increasing resistance to the earphone 10 falling off the ear and thereby improving the stability of the earphone 10 when worn. For example, the end FE of the sound-emitting portion is pressed against the cavum concha in the thickness direction Z. For another example, the end FE abuts the cavum concha in the major axis direction X and / or the minor axis direction Y (e.g., abuts against the inner wall of the cavum concha opposite the end FE). It should be noted that the end FE of the sound-emitting portion 11 refers to the end portion of the sound-emitting portion 11 located opposite the fixed end connected to the suspension structure 12, also referred to as the free end. The sound-emitting portion 11 can be a regular or irregular structure. An exemplary illustration is provided here to further illustrate the end FE of the sound-emitting portion 11. For example, when the sound-emitting portion 11 is a rectangular parallelepiped structure, the end wall surface of the sound-emitting portion 11 is a plane. In this case, the end FE of the sound-emitting portion 11 is the end side wall of the sound-emitting portion 11 opposite the fixed end connected to the suspension structure 12. For another example, when the sound-emitting portion 11 is a sphere, an ellipsoid, or an irregular structure, the end FE of the sound-emitting portion 11 may refer to a specific region away from the fixed end obtained by cutting the sound-emitting portion 11 along the YZ plane (the plane formed by the minor axis direction Y and the thickness direction Z). The ratio of the dimension of the specific region along the major axis direction X to the dimension of the sound-emitting portion along the major axis direction X may be 0.05-0.2.

[0055] By extending the sound-emitting portion 11 at least partially into the concha cavity, the listening volume at the listening position (e.g., at the opening of the ear canal), especially the listening volume of mid- and low-frequency sounds, can be increased, while still maintaining a good far-field sound leakage cancellation effect. For illustrative purposes only, when the entire or partial structure of the sound-emitting portion 11 extends into the concha cavity 102, the sound-emitting portion 11 and the concha cavity 102 form a cavity-like structure (hereinafter referred to as a quasi-cavity). In the embodiments of the specification, the quasi-cavity structure can be understood as a semi-enclosed structure surrounded by the side walls of the sound-emitting portion 11 and the concha cavity 102 structure. This semi-enclosed structure makes the listening position (e.g., at the opening of the ear canal) not completely sealed and isolated from the external environment, but has a leakage structure (e.g., an opening, a gap, a pipe, etc.) that is acoustically connected to the external environment. When the user wears the earphone 10, one or more sound outlet holes may be provided on the side of the shell of the sound-emitting portion 11 close to or facing the user's ear canal, and one or more pressure relief holes may be provided on the other sidewalls of the shell of the sound-emitting portion 11 (for example, the sidewall away from or facing away from the user's ear canal). The sound outlet holes are acoustically coupled to the front cavity of the earphone 10, and the pressure relief holes are acoustically coupled to the back cavity of the earphone 10. Taking the example of the sound-emitting portion 11 including a sound outlet hole and a pressure relief hole, the sound output by the sound outlet hole and the sound output by the pressure relief hole can be approximately regarded as two sound sources, the sound phases of the two sound sources are opposite, forming a dipole. The inner wall corresponding to the sound-emitting portion 11 and the cavum conchae 102 form a cavity-like structure, wherein the sound source corresponding to the sound outlet hole is located inside the cavity-like structure, and the sound source corresponding to the pressure relief hole is located outside the cavity-like structure, forming the acoustic model shown in Figure 4. As shown in Figure 4, the cavity-like structure 402 can include a listening position and at least one sound source 401A. The word "included" here can mean that at least one of the listening position and the sound source 401A is inside the cavity-like structure 402, or it can mean that at least one of the listening position and the sound source 401A is at the inner edge of the cavity-like structure 402. The listening position can be equivalent to the ear canal opening of the ear, or it can be an acoustic reference point of the ear, such as ERP, DRP, etc., or it can be an entrance structure leading to the listener. The sound source 401B is located outside the cavity-like structure 402, and the sound sources 401A and 401B with opposite phases form a dipole. The dipoles radiate sound into the surrounding space respectively and cause interference and destructive sound waves to achieve a sound leakage cancellation effect. Since the sound path difference between the two sounds is larger at the listening position, the effect of sound cancellation is relatively insignificant, and louder sounds can be heard at the listening position than at other positions. Specifically, since the sound source 401A is wrapped by the cavity-like structure 402, most of the sound radiated by it will reach the listening position through direct radiation or reflection. In contrast, without the cavity-like structure 402, most of the sound radiated by the sound source 401A would not reach the listening position. Therefore, the provision of the cavity-like structure 402 significantly increases the volume of the sound reaching the listening position.At the same time, only a small portion of the anti-phase sound radiated by anti-phase sound source 401B outside cavity-like structure 402 enters cavity-like structure 402 through leakage structure 403 of cavity-like structure 402. This is equivalent to generating a secondary sound source 401B' at leakage structure 403, whose intensity is significantly lower than that of sound source 401B and also significantly lower than that of sound source 401A. The sound generated by secondary sound source 401B' has a weak anti-phase cancellation effect on sound source 401A within the cavity, significantly increasing the listening volume at the listening position. Regarding sound leakage, the sound radiated by sound source 401A to the outside world through the cavity's leakage structure 402 is equivalent to generating a secondary sound source 401A' at leakage structure 402. Since almost all of the sound radiated by sound source 401A is output from leakage structure 403, and the scale of cavity-like structure 402 is much smaller than the spatial scale of the sound leakage evaluation (at least an order of magnitude different), the intensity of secondary sound source 401A' can be considered comparable to that of sound source 401A. For the external space, the sound cancellation effect produced by the secondary sound source 401A' and the sound source 401B is equivalent to the sound cancellation effect produced by the sound source 401A and the sound source 401B. That is, under this type of cavity structure, a considerable sound leakage reduction effect is still maintained.

[0056] In a specific application scenario, the outer wall surface of the shell of the sound-emitting part 11 is usually a plane or a curved surface, while the contour of the user's concha is an uneven structure. By extending part or all of the sound-emitting part 11 into the concha, a cavity-like structure connected to the outside world is formed between the sound-emitting part 11 and the contour of the concha. Furthermore, the sound outlet is set at a position where the shell of the sound-emitting part faces the user's ear canal opening and close to the edge of the concha, and the pressure relief hole is set at a position where the sound-emitting part 11 is away from or far away from the ear canal opening, so as to construct the acoustic model shown in Figure 4, so that the user can improve the listening position at the ear opening when wearing headphones, and reduce the sound leakage effect in the far field.

[0057] FIG5 is a schematic diagram of an exemplary structure of an earphone according to some embodiments of this specification.

[0058] 5 , the earphone 10 may include a sound-emitting portion 11 and a suspension structure 12. In some embodiments, the sound-emitting portion 11 of the earphone 10 may include a transducer and a housing for accommodating the transducer, wherein the transducer is an element that can receive an electrical signal and convert it into a sound signal for output. In some embodiments, 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-range (e.g., 30Hz-16kHz) speaker, or any combination thereof, differentiated by frequency. The low frequency, high frequency, etc. mentioned here only represent the approximate range of frequencies, and different division methods may be used in different application scenarios. For example, a crossover point may be determined, the low frequency represents the frequency range below the crossover point, and the high frequency represents the frequency above the crossover point. The crossover frequency point can be any value within the audible range of the human ear, for example, 500 Hz, 600 Hz, 700 Hz, 800 Hz, 1000 Hz, etc.

[0059] In some embodiments, the transducer may include a diaphragm. When the diaphragm vibrates, sound may be emitted from the front and rear sides of the diaphragm, respectively. In some embodiments, a front cavity (not shown) for transmitting sound is provided at the front side of the diaphragm in the shell. The front cavity is acoustically coupled to the sound outlet hole, and the sound from the front side of the diaphragm may be emitted from the sound outlet hole through the front cavity. A rear cavity (not shown) for transmitting sound is provided at the rear side of the diaphragm in the shell. The rear chamber is acoustically coupled to the pressure relief hole, and the sound from the rear side of the diaphragm may be emitted from the pressure relief hole through the rear cavity.

[0060] 5 , this specification uses an ear hook as an example of the suspension structure 12. In some embodiments, the ear hook may include a first portion 121 and a second portion 122 connected in sequence, wherein the first portion 121 may be hung between the posterior medial side of the user's auricle and the head, and the second portion 122 may extend toward the anterior lateral side of the auricle (the side of the auricle facing away from the human head along the coronal axis) and connect to the sound-emitting portion 11, thereby placing the sound-emitting portion 11 near the user's ear canal but not blocking the ear canal opening. In some embodiments, a sound outlet may be provided on the side wall of the shell of the sound-emitting portion 11 facing the auricle, thereby directing the sound generated by the transducer out of the shell and then toward the user's ear canal opening. In some embodiments, when the user wears the earphone 10, at least a portion of the sound-emitting portion 11 may extend into the user's cavum concha (for example, the position of the sound-emitting portion 11B relative to the ear shown in FIG. 2 ), thereby forming the cavity-like structure described above, thereby increasing the listening volume at the ear canal opening.

[0061] In some embodiments, the headset 10 may further include a microphone for collecting acoustic signals (such as user voice, ambient sound, etc.), and the microphone may be located in the ear hook or the sound-emitting portion, and the sound-emitting portion or the ear hook may be provided with a sound receiving hole that is acoustically conductive to the microphone. In some embodiments, the headset 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 may respectively collect sound signals at their corresponding positions, such as user voice, ambient sound, etc. In some embodiments, the first microphone and the second microphone may both be arranged in the sound-emitting portion 11. In some embodiments, the first microphone and the second microphone may also both be arranged in the ear hook. In some embodiments, one of the first microphone and the second microphone may be arranged in the ear hook, and the other may be arranged in the sound-emitting portion 11. The following is explained with reference to Figure 5 as an example. As shown in Figure 5, the first microphone (not shown in Figure 5) is located in the ear hook, and the ear hook is provided with a first sound receiving hole 1191 that is acoustically connected to the first microphone. The second microphone (not shown in Figure 5) is located in the sound-emitting part 11, and the sound-emitting part 11 is provided with a second sound receiving hole 1192 that is acoustically connected to the second microphone. Moreover, when the user wears the earphones, the first sound receiving hole 1191 and the second sound receiving hole 1192 are not blocked so as to receive the sound information of the user speaking or the sound information from the outside world. In some embodiments, the first sound receiving hole 1191 and the second sound receiving hole 1192 can be a double-hole structure. For example, the number of first sound receiving holes 1191 is two, and the first microphone corresponds to two first sound receiving holes 1191. The two first sound receiving holes 1191 are connected inside the ear hook or the sound-emitting part. When there is pressure fluctuation caused by air flow velocity in the external environment, by setting the first sound receiving hole 1191 and the second sound receiving hole 1192 into a double-hole structure, the first sound receiving hole 1191 and the second sound receiving hole 1192 can balance the pressure between their outsides (the outer surface of the ear hook or the sound-emitting part where the sound holes are located), and then transmit it to the inside of the first sound hole 1191 and the second sound hole 1192. Because the central axis of the inner side of the first sound receiving hole 1191 and the second sound receiving hole 1192 is perpendicular to the direction of airflow, the pressure fluctuation will be reduced, and the wind noise caused by it will also be reduced accordingly. Therefore, by providing the first microphone, the second microphone, and the first sound receiving hole 1191 acoustically connected to the first microphone and the second sound receiving hole 1192 acoustically connected to the second microphone, the wind noise can be reduced. In some embodiments, the first sound receiving hole 1191 and the second sound receiving hole 1192 can be regular or irregular shapes such as circular holes, square holes, elliptical holes, and diamond holes. The shape of the first sound receiving hole 1191 and the shape of the second sound receiving hole 1192 can be the same or different.

[0062] FIG6 is a schematic diagram illustrating an exemplary wearing method of an earphone according to some embodiments of this specification.

[0063] Referring to Figures 5 and 6, in some embodiments, when the earphone 10 is in the worn state, at least a portion of the sound-emitting portion 11 can extend into the user's cavum concha. In some embodiments, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 can point toward the user's mouth, thereby ensuring that the first microphone and the second microphone have good sound reception. In some embodiments, when the earphone 10 is in the worn state, the first sound receiving hole 1191 can be located closest to the mouth, thereby improving the sound reception of the first microphone when collecting the sound emitted by the user's mouth. The first sound receiving hole 1191 and the second sound receiving hole 1192 are both located close to the user's mouth. Therefore, the sound emitted by the user's mouth is perceived as near-field sound by the first and second microphones. Furthermore, the first sound receiving hole 1191 and the second sound receiving hole 1192 are located at different distances from the user's mouth, resulting in differences between the sounds emitted by the user's mouth received by the first and second microphones (e.g., different amplitudes or phases). Noise from the environment can be considered far-field sound by both the first and second microphones. The first and second microphones receive substantially the same noise (for example, the amplitude or phase of the sound is substantially the same). By subtracting the signal received by the second microphone from the signal received by the first microphone and amplifying the signal, a better noise-canceling vocal effect can be achieved. Therefore, a certain distance needs to be set between the first sound receiving hole 1191 and the second sound receiving hole 1192 to facilitate subsequent signal processing. When the earphone 10 is worn, at least a portion of the sound-emitting portion 11 extends into the cavum concha. While ensuring that the first sound receiving hole 1191 is positioned near the user's mouth and that there is sufficient distance between the first sound receiving hole 1191 and the second sound receiving hole 1192, the second sound receiving hole 1192 may be closer to the antihelix. This can cause the antihelix to reflect sound waves generated by the user's speech or external sound waves when they are transmitted to the sound waves. This can cause the sound received by the second microphone to be louder than that received by the first microphone, particularly in the frequency range of 3kHz-8kHz, thereby affecting the subsequent noise reduction and sound reception. Based on the above issues, in some embodiments, the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192, as well as the distance between the second sound receiving hole 1192 and the edge of the user's antihelix, can be adjusted to ensure the noise reduction and sound reception of the earphones. As shown in Figure 6, when the earphones 10 are in the worn state, the first sound receiving hole 1191 can have a first projection point P on the user's sagittal plane (e.g., the TS plane shown in Figure 6), and the second sound receiving hole 1192 can have a second projection point O on the user's sagittal plane.In some embodiments, in order to more clearly describe the positional relationship between the first sound receiving hole 1191, the second sound receiving hole 1192, and the antihelix of the user's auricle, the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 can be reflected by a first distance OP between a first projection point P of the first sound receiving hole 1191 on the sagittal plane and a second projection point O of the second sound receiving hole 1192 on the sagittal plane. In some embodiments, an extension line of a line connecting the first projection point P of the first sound receiving hole on the user's sagittal plane and the second projection point O of the second sound receiving hole on the sagittal plane has an intersection A with the projection of the user's antihelix on the sagittal plane, and the distance between the second sound receiving hole 1192 and the user's antihelix can be reflected by a second distance OA between the second projection point O of the second sound receiving hole 1192 on the sagittal plane and the intersection A. The cavum concha refers to the concave area below the crus of the helix. That is, the edge of the cavum concha is comprised of at least the sidewall below the crus of the helix, the outline of the tragus, the intertragic notch, the antitragic apex, the tragic notch, and the outline of the antihelical body corresponding to the cavum concha. Based on this, in some embodiments, to ensure that the first and second microphones in the earphone 10 provide excellent sound reception and noise reduction, 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 is set between 1.8 and 4.4. To reduce the influence of the antihelix on the second microphone, the distance between the second sound receiving hole 1192 and the antihelix can be increased, while the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 can be increased to facilitate subsequent signal processing. 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 is set between 2.5 and 3.8. Preferably, when the earphone is worn in the same position, to further reduce the effect of the antihelix on the second microphone, the distance between the second sound receiving hole 1192 and the antihelix can be increased, while the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 can be increased. This facilitates subsequent signal processing. 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 can be between 2.8 and 3.5. To reduce the effect of the antihelix on the second microphone and facilitate subsequent signal processing, the distance between the second sound receiving hole 1192 and the antihelix can be further increased, while the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 can be further increased. 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 can be between 3.0 and 3.3.

[0064] It should be noted that, in this specification, the first projection point P may refer to the centroid of the projection of the first sound receiving hole 1191 on the user's sagittal plane. Similarly, the second projection point O may refer to the centroid of the projection of the second sound receiving hole 1192 on the user's sagittal plane. When the sizes of the first sound receiving hole 1191 and the second sound receiving hole 1192 are relatively small (for example, the diameter is less than 2 mm), the projections of the first sound receiving hole 1191 and the second sound receiving hole 1192 on the sagittal plane can be directly approximated as a single point.

[0065] Considering that when the second sound receiving hole 1192 is close to the antihelix, sound waves generated by the user's speech or external sound waves will be reflected by the antihelix when they are transmitted to the antihelix, especially in the frequency range of 3kHz-8kHz. This can cause the sound received by the second microphone to be louder than that received by the first microphone, thus affecting the subsequent noise reduction and sound reception. Furthermore, due to the limited size of the sound-emitting portion 11, a large distance must be maintained between the first sound receiving hole 1191 and the second sound receiving hole 1192. When the second sound receiving hole 1192 is far from the antihelix, the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 becomes smaller, affecting subsequent signal processing. Based on this, in some embodiments, to ensure sufficient difference between the sounds emitted by the user's mouth received by the first and second microphones, while reducing the sound enhancement effect of the antihelix on the second sound receiving hole 1192, the distance between the second projection point O of the second sound receiving hole 1192 on the sagittal plane and the intersection point A can be set to between 2mm and 10mm. To reduce the sound amplification effect of the antihelix on the second sound receiving hole 1192 and improve the sound reception of the first and second microphones, the distance between the second sound receiving hole 1192 and the antihelix can be increased. In some embodiments, the distance between the second projection point O and the intersection point A can be between 4 mm and 10 mm. To further reduce the reflection effect of the antihelix on sound waves and further improve the sound reception of the first and second microphones, the distance between the second sound receiving hole 1192 and the antihelix can be further increased. Preferably, the distance between the second projection point O and the intersection point A can be between 6 mm and 10 mm. When the second sound receiving hole 1192 is positioned farther from the antihelix, the reflection effect of the antihelix on sound waves will hardly affect the second sound receiving hole 1192. More preferably, the distance between the second projection point O and the intersection point A can be between 8 mm and 10 mm.

[0066] When the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 is too small, the amplitude and phase difference of the low-frequency sound signals received by the first microphone and the second microphone will be too small, resulting in increased difficulty in subsequent processing of the low-frequency signal. Therefore, the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 should not be too small.

[0067] In some embodiments, in order to ensure that the first microphone and the second microphone have a good sound reception effect and facilitate subsequent signal processing, the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 may be no less than 10 mm. In order to ensure the portability of the earphones and the comfort of the user when wearing the earphones, the size of the sound-emitting part 11 itself should not be too large. Correspondingly, the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 is limited by the size of the sound-emitting part 11. In some embodiments, the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 is no more than 50 mm. In some embodiments, taking into account the size limitation of the sound-emitting part 11 itself and in order to ensure that the first microphone and the second microphone have a good sound reception effect and facilitate subsequent signal processing, the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 can be between 10 mm and 50 mm. The distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 mentioned here refers to the straight-line distance between the centers of the openings of the first sound receiving hole 1191 and the second sound receiving hole 1192 on the outer surface of the sound-emitting portion 11 or the ear hook 12 (for example, the distance D12 shown in FIG5 ). Considering that an excessively large size of the sound-emitting portion 11 may affect the stability and comfort of carrying and wearing the earphone, the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 can be appropriately reduced, while ensuring that the first microphone and the second microphone can have good sound receiving effects and facilitate subsequent signal processing, so that the size of the sound-emitting portion 11 can be relatively small. Preferably, in some embodiments, the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 can be between 20 mm and 47 mm. More preferably, in order to ensure that the sound signals received by the first microphone and the second microphone are sufficiently different and the sound-emitting portion 11 has an appropriate size, the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 can be between 27 mm and 32 mm. As a specific example, the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 may be 26 mm.

[0068] In some embodiments, the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 can also be reflected by the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the second projection point O of the second sound receiving hole 1192 on the sagittal plane. It can be understood that when the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 is not parallel to the user's sagittal plane, there may be a certain difference between the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 compared to the distance between the first projection point P and the second projection point O, which is specifically manifested in that the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 is greater than the distance between the first projection point P and the second projection point O. With reference to the above-mentioned content regarding the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192, and taking into account the size limitation of the sound-emitting part 11 itself and the good sound receiving effect of the first microphone and the second microphone and the convenience of subsequent signal processing, in some embodiments, the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the second projection point O of the second sound receiving hole 1192 on the sagittal plane can be between 8mm and 48mm. Preferably, the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the second projection point O of the second sound receiving hole 1192 on the sagittal plane can be between 18mm and 45mm. More preferably, the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the second projection point O of the second sound receiving hole 1192 on the sagittal plane can be between 25mm and 30mm.

[0069] In this wearing state, the distance between the first sound receiving hole 1191 and the user's mouth (refer to point Q in Figure 6) is smaller than the distance between the second sound receiving hole 1192 and the user's mouth to facilitate subsequent signal processing. As shown in Figure 6, when the earphone 10 is in the wearing state, the first sound receiving hole 1191 can have a first projection point P on the user's sagittal plane (for example, the TS plane shown in Figure 6), the second sound receiving hole 1192 can have a second projection point O on the user's sagittal plane, and the third projection point Q is used to represent the projection of the user's mouth (for example, the lip bead) on the user's sagittal plane. The user's mouth has a third projection point Q on the user's sagittal plane, wherein the distance between PQ is smaller than the distance between OQ.

[0070] In some embodiments, the line connecting the first projection point P of the first sound receiving hole 1191 on the user's sagittal plane and the second projection point O of the second sound receiving hole 1192 on the same sagittal plane is approximately oriented toward the third projection point Q of the user's mouth on the same sagittal plane. This allows a directivity algorithm to be constructed based on the sound received by the first and second microphones, enhancing the clarity of the received user's voice. In some embodiments, the line PQ connecting the first projection point P and the third projection point Q can be at an angle relative to the line OQ connecting the second projection point O and the third projection point Q. To ensure directivity of the first and second sound receiving holes 1191 and 1192, the angle between PQ and OQ can be less than 30°. In some embodiments, the angle between PQ and OQ can be 5°-25°. Preferably, the angle between PQ and OQ can be 8°-15°. For example, in some embodiments, the angle between PQ and OQ can be 0°, 3°, 9°, or 15°.

[0071] Referring to Figure 5, in some embodiments, the first sound receiving hole 1191 can be located in the second portion 112 of the earhook (the portion of the earhook near the sound-emitting portion). Specifically, in some embodiments, the first sound receiving hole 1191 can be located near the connection between the second portion 122 of the earhook and the sound-emitting portion 11. For example, the first sound receiving hole 1191 can be located on the second portion 122 of the earhook or on the sound-emitting portion 11. In this specification, "the first sound receiving hole 1191 can be located near the connection between the second portion 122 of the earhook and the sound-emitting portion 11" can be understood as meaning that the minimum distance between the first sound receiving hole 1191 and the connection is no greater than 4 mm. In some embodiments, the positional relationship of the first sound receiving hole 1191 relative to the second portion 122 of the earhook and the sound-emitting portion 11 can also be characterized by the distance between the projection of the first sound receiving hole 1191 on the sagittal plane and the projection of the connection on the sagittal plane. For example, in some embodiments, the minimum distance between the projection of the first sound receiving hole 1191 on the sagittal plane and the projection of the connection can be no greater than 4 mm. When the user wears the earphones, the sound-emitting part 11 is closer to the user's mouth. In order to improve the sound reception effect of the first microphone, preferably, the minimum distance between the projection of the first sound receiving hole 1191 on the sagittal plane and the projection of the connection on the sagittal plane may be no more than 3 mm. In some embodiments, the first sound receiving hole 1191 can also be provided at the connection between the sound-emitting part 11 and the second part 122 of the ear hook. In this case, the first sound receiving hole 1191 is closer to the user's mouth, and the sound reception effect of the first microphone is better. In some embodiments, the sound-emitting part 11 and the second part 122 of the ear hook can be independent structures, and the two can be connected by splicing, embedding, plugging, etc. The connection between the sound-emitting part 11 and the second part 122 of the ear hook can refer to the connection gap between the two. The projection of the connection between the sound-emitting part 11 and the second part 122 of the ear hook on the sagittal plane refers to the projection of the connection gap between the two on the sagittal plane. In some embodiments, the first sound receiving hole 1191 is arranged near the connection between the sound-emitting part 11 and the second part 122 of the ear hook (for example, the first sound receiving hole 1191 is arranged on the second part 122 of the ear hook) to ensure that the first sound receiving hole 1191 is close to the user while not occupying the internal cavity space of the sound-emitting part 11, thereby facilitating the installation of the transducer and the routing of internal circuits, and effectively improving production efficiency.

[0072] It should also be noted that in some embodiments, when the first sound receiving hole 1191 and the second sound receiving hole 1192 are relatively small, they can be approximately considered a single point. In some embodiments, when the first sound receiving hole 1191 and the second sound receiving hole 1192 are relatively large, the distance between the first sound receiving hole 1191 and the connection between the sound-emitting portion 11 and the second portion 122 of the earhook can be understood as the minimum distance between the center of the first sound receiving hole 1191 and the connection between the sound-emitting portion 11 and the second portion 122 of the earhook. Correspondingly, when the first sound receiving hole 1191 is relatively small, the projection of the first sound receiving hole 1191 on the sagittal plane can be approximately considered a single point, and the minimum distance between the projection of the first sound receiving hole 1191 on the sagittal plane and the projection of the connection between the sound-emitting portion 11 and the second portion 122 of the earhook on the sagittal plane refers to the minimum distance between the projection point of the first sound receiving hole 1191 on the sagittal plane and the projection of the connection on the sagittal plane. When the first sound receiving hole 1191 is relatively large, the minimum distance between the projection of the first sound receiving hole 1191 on the sagittal plane and the projection of the connection between the sound-emitting portion 11 and the second portion 122 of the ear hook on the sagittal plane refers to the minimum distance between the centroid of the projection of the first sound receiving hole 1191 on the sagittal plane and the projection of the connection on the sagittal plane. Similarly, the distance between the sound receiving hole and a side surface of the sound-emitting portion 11 (e.g., the inner side surface, the upper side surface) described elsewhere in this specification can be understood as the minimum distance from the center of the sound receiving hole to the side surface of the sound-emitting portion 11.

[0073] It should be understood that the positions of the first sound receiving hole 1191 and the second sound receiving hole 1192 shown in FIG. 5 are merely exemplary. In some embodiments, the first sound receiving hole 1191 and / or the second sound receiving hole 1192 may be located in other unobstructed locations. For example, in some embodiments, the first sound receiving hole 1191 and the second sound receiving hole 1192 may be located together on the outer side of the sound-emitting portion 11. For another example, in some embodiments, the first sound receiving hole 1191 may be located on the outer side of the sound-emitting portion 11, and the second sound receiving hole 1192 may be located on the upper side of the sound-emitting portion 11. It should be noted that, in this specification, the inner side surface of the sound-emitting portion 11 may refer to the surface of the earphone 10 that is closest to the user's head when the earphone is worn (refer to the inner side surface IS in Figures 15A and 15B), and the upper side surface of the sound-emitting portion 11 may refer to the surface of the earphone 10 that is farthest from the ground when the earphone is worn (refer to the upper side surface US in Figures 15A and 15B). Accordingly, the surface opposite to the inner side surface may be regarded as the outer side surface of the sound-emitting portion 10 (refer to the outer side surface OS in Figure 15A), and the surface opposite to the upper side surface may be regarded as the lower side surface of the sound-emitting portion 10 (refer to the lower side surface LS in Figure 15B). In some embodiments, each of the upper side surface, lower side surface, inner side surface and outer side surface of the sound-emitting portion 11 may be a plane and / or a non-plane. The specific distribution positions of the first sound receiving hole 1191 and the second sound receiving hole 1192 will be described below in conjunction with Figures 7 to 16B.

[0074] FIG7 is a schematic diagram of exemplary wearing of headphones according to other embodiments of this specification.

[0075] 7 , the shape of the projection of the sound-emitting part 11 on the sagittal plane may include a long axis direction X and a short axis direction Y. FIG8 is a schematic diagram of an exemplary coordinate system established according to the projection of the sound-emitting part on the sagittal plane shown in some embodiments of the present specification. Referring to FIG8 , a coordinate system is established with the long axis direction X and the short axis direction Y, and the coordinates in the coordinate system are used to characterize the relative position of the first sound receiving hole 1191 relative to the sound-emitting part 11, wherein the Y axis is a tangent parallel to the short axis direction Y and tangent to the projection of the front side of the sound-emitting part 11 on the sagittal plane, and the X axis is a tangent parallel to the long axis direction X and tangent to the projection of the lower side of the sound-emitting part 11 on the sagittal plane. In some embodiments, the position of the Y-axis can be determined by: first determining the projection of the sound-emitting part 11 on the sagittal plane; finding the tangent line (referred to as "tangent line I") that is parallel to the short-axis direction Y and tangent to the projection of the posterior side of the sound-emitting part 11 on the sagittal plane; determining the center of the projection of the diaphragm or magnetic circuit assembly in the sound-emitting part 11 on the sagittal plane; finding the symmetry line of the tangent line I about the center, and using the symmetry line as the straight line where the Y-axis is located.

[0076] Referring to Figure 8 , on the Y-axis, 1X can represent the line Y=1, 2X can represent the line Y=2, 3X can represent the line Y=3, 4X can represent the line Y=4, and so on. Similarly, on the X-axis, Y1 can represent the line X=1, Y2 can represent the line X=2, Y3 can represent the line X=3, and so on. In some embodiments, the coordinates of points in this coordinate system can be represented as YX. For example, on the line Y=2, which is parallel to the X-axis, since the value of Y=2 remains constant, the coordinates of points on this line can be uniformly represented as 2X. When X takes different values, different positions can be obtained, such as position 21, position 22, position 23, and so on. As shown in Figures 7 and 8 , in some embodiments, the sound-emitting portion 11 can be divided into four equal parts along the major axis X and four equal parts along the minor axis Y. In some embodiments, the sound-emitting portion 11 can also be divided into other equal parts along the major axis X and minor axis Y. The following describes the sound reception conditions of the first sound receiving hole 1191 at different positions based on the coordinate system.

[0077] Figure 9 is a schematic diagram of sound reception curves for different positions of the first sound receiving hole according to some embodiments of this specification. As shown in Figure 9 , when Y = 1, the coordinates along the X-axis on the line Y = 1 can be uniformly represented as 1X. When X takes different values, corresponding positions can be determined, such as position 11, position 12, position 13, position 14, and so on. Figure 9 illustrates that to achieve a good sound reception effect for the first microphone while ensuring that the second sound receiving hole maintains a specific spacing from the first sound receiving hole and is as far away from the antihelix as possible, the ratio of the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the front side of the sound-emitting part 11 on the sagittal plane along the longitudinal axis X to the dimension of the projection of the sound-emitting part 11 on the sagittal plane along the longitudinal axis X is no greater than 0.75. That is, when the sound-emitting part 11 is divided into four equal parts along the longitudinal axis X, the first projection point P is located in the region where X ≤ 3. In order to bring the first sound receiving hole 1191 closer to the user's mouth and improve the sound receiving effect of the first microphone, preferably, the ratio of the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the front side of the sound-emitting part 11 on the sagittal plane in the long axis direction X to the size of the projection of the sound-emitting part 11 on the sagittal plane along the long axis direction X may be no greater than 0.5. More preferably, in order to bring the first sound receiving hole 1191 closer to the user's mouth and improve the sound receiving effect of the first microphone, the ratio of the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the front side of the sound-emitting part 11 on the sagittal plane in the long axis direction X to the size of the projection of the sound-emitting part 11 on the sagittal plane along the long axis direction X may be no greater than 0.3. More preferably, in order to bring the first sound receiving hole 1191 closer to the user's mouth to improve the sound receiving effect of the first microphone, the ratio of the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the front side of the sound-emitting part 11 on the sagittal plane in the long axis direction X to the size of the projection of the sound-emitting part 11 on the sagittal plane along the long axis direction X can be no greater than 0.2. Placing the first sound receiving hole 1191 close to the front side of the sound-emitting part can also provide more options for the position of the second sound receiving hole 1192, ensuring that the second sound receiving hole can maintain a specific distance from the first sound receiving hole and that the second sound receiving hole can be as far away from the antihelix as possible. Based on the above considerations, more preferably, the ratio of the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the front side of the sound-emitting part 11 on the sagittal plane in the long axis direction X to the size of the projection of the sound-emitting part 11 on the sagittal plane along the long axis direction X can be no greater than 0.1. Further preferably, in some embodiments, the first sound receiving hole 1191 can also be located on the front side of the sound-emitting part 11. In this case, the first sound receiving hole 1191 is closer to the user's mouth in the horizontal direction, and the sound receiving effect of the first microphone is better.It should be noted that, for the sake of ease of understanding, the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the front side of the sound-emitting part 11 on the sagittal plane in the long axis direction X can refer to the distance between the first projection point P and the Y axis, that is, the distance between the first projection point P and the tangent along the short axis direction Y and tangent to the projection of the front side of the sound-emitting part 11 on the sagittal plane.

[0078] FIG10 is a schematic diagram of the sound reception curve of the first sound receiving hole at different positions according to other embodiments of this specification. As shown in FIG10 , when X=1, the coordinates along the Y-axis on the straight line X=1 can be uniformly represented as Y1. When Y takes different values, the corresponding positions can be determined, such as position 11, position 21, position 31, position 41, etc. FIG10 shows the sound reception of the first microphone at positions 11, 21, 31, and 41, respectively. As can be seen from FIG10 , on Y1, the smaller the Y-axis coordinate is and the closer it is to the user's mouth, the better the sound reception effect of the microphone.

[0079] Based on this, in some embodiments, in order to make the first microphone have a better sound receiving effect, the ratio of the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the lower side of the sound-emitting part on the sagittal plane in the short axis direction Y to the size of the projection of the sound-emitting part 11 on the sagittal plane along the short axis direction Y can be no more than 1. Taking into account that the first sound receiving hole 1191 and the second sound receiving hole 1192 are both located on the sound-emitting part 11, if the first sound receiving hole 1191 is located at the maximum distance from the upper side or the front side of the sound-emitting part relative to the long axis direction X, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 cannot point to the user's mouth, which will affect the sound receiving effect. Preferably, the ratio of the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the lower side of the sound-emitting part on the sagittal plane in the short axis direction Y to the size of the projection of the sound-emitting part 11 on the sagittal plane along the short axis direction Y can be made not greater than 0.5, that is, when the sound-emitting part is divided into 4 equal parts along the short axis direction Y, the first projection point P is located in the area where Y≤2. Preferably, to bring the first sound receiving hole 1191 closer to the user's mouth and improve the sound receiving effect of the first microphone, in some embodiments, the ratio of the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the lower side of the sound-emitting part 11 on the sagittal plane in the short axis direction Y to the size of the projection of the sound-emitting part 11 on the sagittal plane along the short axis direction Y may be no greater than 0.4. Preferably, the ratio of the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the lower side of the sound-emitting part 11 on the sagittal plane in the short axis direction Y to the size of the projection of the sound-emitting part 11 on the sagittal plane along the short axis direction Y may be no greater than 0.3. Placing the first sound receiving hole 1191 closer to the lower side of the sound-emitting part also provides more options for the position of the second sound receiving hole 1192, ensuring that the second sound receiving hole maintains a specific distance from the first sound receiving hole and that the line connecting the first and second sound receiving holes can be more accurately directed toward the user's mouth. Based on the above considerations, it is more preferred that the ratio of the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the lower side surface of the sound-emitting part 11 on the sagittal plane in the short axis direction Y to the size of the projection of the sound-emitting part 11 on the sagittal plane along the short axis direction Y can be less than or equal to 0.1. More preferably, the first sound receiving hole 1911 can be located on the lower side surface of the sound-emitting part 11. In this case, the first sound receiving hole 1191 is closer to the user's mouth in the vertical direction, and the sound receiving effect of the first microphone is better. It should be noted that, for ease of understanding, the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the lower side surface of the sound-emitting part 11 on the sagittal plane in the short axis direction Y can refer to the distance between the first projection point P and the X-axis, that is, the distance between the first projection point P and the tangent line along the long axis direction X and tangent to the projection of the lower side surface of the sound-emitting part 11 on the sagittal plane.

[0080] FIG11 is a schematic diagram of the sound reception curves of the second sound receiving hole at different positions according to other embodiments of the present specification. As shown in FIG11 , when Y=4, the coordinates along the X-axis on the straight line Y=4 can be uniformly expressed as 4X. When X takes different values, the corresponding positions can be determined, such as position 41, position 42, position 43, position 44, etc. FIG11 shows the sound reception conditions at positions 41, 42, 43, and 44, respectively. As can be seen from FIG11 , on 4X, as X increases, the distance from the second sound receiving hole to the user's antihelix becomes smaller, and the influence of the antihelix reflection becomes greater. For example, when X is larger, the second microphone will significantly increase the sound reception in the frequency band after 3kHz, resulting in different change patterns of the second microphone before and after 3kHz. That is, if the second sound receiving hole 1192 is set at a position closer to the antihelix, the sound receiving effect of the second sound receiving hole 1192 after 3kHz will be stronger than that of the first sound receiving hole 1191, resulting in the first microphone and the second microphone to pick up the sound of the user's mouth worse.

[0081] Figure 12 is a schematic diagram of the sound reception curves when the sound receiving holes are located at different positions according to other embodiments of this specification. As shown in Figure 12, the sound reception effect of the microphone at position 21 is better than the sound reception of the microphones at positions 33, 34, 43, and 44. In some embodiments, the first sound receiving hole 1191 can be set at position 21, and the second sound receiving hole 1192 can be set at position 33, 34, 43, or 44. At this time, the sound reception effect of the first sound receiving hole 1191 is better than that of the second sound receiving hole 1192 in the full frequency band. When the second sound receiving hole 1192 is set at position 33 or position 34, the sound reception effect of the second sound receiving hole 1192 is better, and is more consistent with the sound reception curve at the first sound receiving hole 1191. After processing, the signals of the first and second microphones can obtain the sound of the user's mouth in a wider frequency band. When the second sound receiving hole 1192 is located at position 43 or position 44, the distance between the second sound receiving hole 1192 and the first sound receiving hole 1191 is greater, which is more conducive to noise reduction. After the signals of the first microphone and the second microphone are processed, the sound of the user's mouth can be obtained more clearly in the low-frequency range.

[0082] Figure 13 is a schematic diagram of the sound reception curve when the sound receiving holes are located at different positions according to other embodiments of this specification. As shown in Figure 13, it shows the sound reception conditions of the microphones at positions 11 and 14. The microphone at position 11 has better sound reception effect over the entire frequency band than the microphone at position 14. In some embodiments, the first sound receiving hole 1191 can be set at position 11, and the second sound receiving hole 1192 can be set at position 14. At this time, the sound reception effects of the first sound receiving hole 1191 and the second sound receiving hole 1192 are both good. After processing, the signals of the first microphone and the second microphone can obtain the sound of the user's mouth in a wider frequency band.

[0083] Figure 14 is a schematic diagram of the sound reception curves when the sound receiving holes are located at different positions according to other embodiments of this specification. As shown in Figure 14, the sound reception conditions of the microphones at positions 31 and 43 are shown. The microphone at position 31 has better sound reception effect than the microphone at position 43 in the entire frequency band. In some embodiments, the first sound receiving hole 1191 can be set at position 31, and the second sound receiving hole 1192 can be set at position 43. At this time, the sound reception effects of the first sound receiving hole 1191 and the second sound receiving hole 1192 are both good. After processing, the signals of the first microphone and the second microphone can obtain the sound of the user's mouth in a wider frequency band.

[0084] In some embodiments, the projection of the sound-emitting part 11 on the sagittal plane can be runway-shaped, and the extension lines of the two sides of the runway-shaped projection close to the mouth (i.e., the projection of the lower side and the front side of the sound-emitting part 11) have an intersection, 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 Figure 7, the origin of the XY coordinate system shown in Figure 8). In order to make the first sound receiving hole 1191 as close to the user's mouth as possible, the distance between the first projection point P and the fourth projection point of the first sound receiving hole 1191 on the sagittal plane needs to meet a preset condition. The larger the distance, the farther the first projection point P is from the intersection G shown in Figure 7 and the origin of the XY coordinate system shown in Figure 8. Correspondingly, the farther the distance between the first sound receiving hole 1191 and the user's mouth is, and the worse the sound reception effect of the first microphone is. Based on this, in some embodiments, in order to ensure the sound reception effect of the first microphone, the distance between the first projection point and the fourth projection point can be made no greater than 5mm. In order to improve the sound reception effect of the first microphone, the first sound receiving hole 1191 can be set at a position on the sound-emitting part 11 that is closer to the user's mouth. In some embodiments, the distance between the first projection point P and the fourth projection point may be no more than 3 mm. In some embodiments, the distance between the first projection point P and the fourth projection point may be no more than 1 mm. Here, the first sound receiving hole 1191 is closer to the user's mouth to further improve the sound reception effect of the first microphone. It should be noted that the projection of the sound-emitting part 11 on the sagittal plane is not limited to the above-mentioned runway shape, but can also be other regular (for example, rectangular, elliptical, circular, etc.) or irregular shapes, as long as the first sound receiving hole 1191 is set at a position close to the user's mouth or close to the origin of the XY coordinate system.

[0085] 15A and 15B are schematic diagrams of exemplary structures of headphones according to other embodiments of this specification.

[0086] 15A and 15B , in some embodiments, the first sound receiving hole 1191 may also be located on the lower side surface LS or the front side surface CE of the sound-emitting portion 11. FIG16A and FIG16B are schematic diagrams of exemplary coordinate systems established according to the sound-emitting portion according to other embodiments of the present specification. Specifically, as shown in FIG16A , when the first sound receiving hole 1191 is located on the front side surface CE of the sound-emitting portion 11, the coordinate of the first sound receiving hole 1191 in the long axis direction X of the sound-emitting portion 11 is 0, and the positional relationship of the first sound receiving hole 1191 relative to the sound-emitting portion 11 can be represented by a YZ coordinate system, wherein the Z axis is the thickness direction of the sound-emitting portion 11, which is perpendicular to both the long axis direction X and the short axis direction Y of the sound-emitting portion 11. Similarly, as shown in Figure 16B , when the first sound receiving hole 1191 is located on the lower side surface LS of the sound-emitting portion 11, the coordinate of the first sound receiving hole 1191 in the short axis direction Y of the sound-emitting portion 11 is 0. The positional relationship of the first sound receiving hole 1191 relative to the sound-emitting portion 11 can be expressed using an XZ coordinate system. A larger Z value indicates a greater distance between the first sound receiving hole 1191 and the inner side surface of the sound-emitting portion 11; a larger X value indicates a greater distance between the first sound receiving hole 1191 and the front side surface of the sound-emitting portion 11; and a larger Y value indicates a greater distance between the first sound receiving hole 1191 and the lower side surface of the sound-emitting portion 11.

[0087] Considering that when the first sound outlet hole 1191 is too close to the inner side of the sound-emitting part 11 (for example, less than 2 mm), not only may the first sound receiving hole 1191 be blocked by the user's ear during wearing, but the first microphone may also collect the noise generated by the friction between the user's ear and the sound-emitting part 11. It can be seen that no matter whether the first sound receiving hole 1191 is located on the lower side or the front side of the sound-emitting part 11, the distance between the first sound receiving hole 1191 and the inner side of the sound-emitting part 11 should not be too close. In addition, the two ears and mouth of the human body are regarded as three points in space, and the three points form an approximately isosceles triangle area. When the earphones are worn, the sound-emitting part 11 needs to be tilted to extend into the concave concha cavity, that is, the line connecting any two points on the outer side of the sound-emitting part 11 will not point to the triangular area. If the first sound receiving hole 1191 is too close to the outer side of the sound-emitting part 11 (for example, the distance from the outer side is less than 2 mm), even if the second sound receiving hole 1192 is set on the outer side of the sound-emitting part 11, it cannot be guaranteed that the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 points to the user's mouth. Based on this, in some embodiments, when the first sound hole 1191 is located on the lower side or front side of the sound-emitting part 11, in order to ensure the sound receiving effect of the first sound hole 1191 and the connecting line between the first sound hole 1191 and the second sound hole 1192 can point to the area in front of the user, the ratio of the distance between the first sound hole 1191 and the inner side of the sound-emitting part 11 in the thickness direction Z of the sound-emitting part to the size of the sound-emitting part 11 along its thickness direction Z can be between 0.25-0.7. Preferably, the ratio of the distance between the first sound receiving hole 1191 and the inner side surface of the sound-emitting portion 11 in the thickness direction Z of the sound-emitting portion to the dimension of the sound-emitting portion 11 along the thickness direction Z can be 0.25-0.65. Placing the first sound receiving hole 1191 relatively far from the inner side surface of the sound-emitting portion 11 can reduce the impact of noise generated by friction between the sound-emitting portion 11 and the ear. At the same time, by reducing the distance between the first sound receiving hole 1191 and the outer side surface of the sound-emitting portion 11, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 can be directed toward the user's mouth. More preferably, the ratio of the distance between the first sound receiving hole 1191 and the inner side surface of the sound-emitting portion 11 in the thickness direction Z of the sound-emitting portion to the dimension of the sound-emitting portion 11 along the thickness direction Z can be 0.3-0.6. Preferably, the ratio of the distance between the first sound hole 1191 and the inner side surface of the sound-emitting part 11 in the thickness direction Z of the sound-emitting part to the size of the sound-emitting part 11 along its thickness direction Z can be 0.3-0.4. Here, by further reducing the distance between the first sound hole 1191 and the outer side surface of the sound-emitting part 11, the connecting line between the first sound hole 1191 and the second sound hole 1192 can be made to point more accurately to the user's mouth.In some embodiments, the inner side surface of the sound-emitting part 11 is a curved surface. In this case, the distance between the first sound hole 1191 and the inner side surface of the sound-emitting part 11 in the thickness direction Z of the sound-emitting part can be equivalent to the distance between the center of the first sound hole 1191 and the tangent plane of the inner side surface of the sound-emitting part 11, wherein the tangent plane of the inner side surface of the sound-emitting part 11 is a plane parallel to the major axis direction X and the minor axis direction Y, and tangent to the inner side surface.

[0088] In some embodiments, the first sound receiving hole 1191 may also be provided on the ear hook (e.g., at the position on the ear hook closest to the user's mouth). Accordingly, to ensure the directionality of the line connecting the second sound receiving hole 1192 and the first sound receiving hole 1191, when the first sound receiving hole 1191 is provided on the ear hook, the second sound receiving hole 1192 may be provided near the connection between the upper side and the front side of the sound-emitting portion 11. In some embodiments, the structure or shape of the ear hook of the earphone 10 may be modified to meet the positional requirements for providing the second sound receiving hole 1192. This ensures that the line connecting the second sound receiving hole 1192 and the first sound receiving hole 1191 is approximately directed toward the user's mouth while ensuring that the distance between the second sound receiving hole 1192 and the first sound receiving hole 1191 is greater than a preset requirement.

[0089] In some embodiments, the second sound receiving hole 1192 can be provided on a side of the sound-emitting part 11 that does not form an auxiliary cavity with the cavum concha. In some embodiments, the second sound receiving hole 1192 can 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-emitting part 11, and the first sound receiving hole 1191 and the second sound receiving hole 1192 are both provided away from components (such as speakers, main control circuit boards, etc.) inside the shell of the sound-emitting part 11. For example, the second sound receiving hole 1192 can 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-emitting part 11. For another example, the second sound receiving hole 1192 can be provided at the connection of any two of the upper side surface US, the lower side surface LS, and the outer side surface OS of the sound-emitting part 11. In some embodiments, to ensure a larger spacing between the first and second sound receiving holes 1191, 1192 while also ensuring the directivity of the line connecting the first and second sound receiving holes 1191, 1192, the first sound receiving hole 1191 is typically positioned diagonally. For example, the first sound receiving hole 1191 is positioned in the lower left corner as shown in FIG6, and the second sound receiving hole 1192 is positioned in the upper right corner as shown in FIG6. To more clearly illustrate the location of the second sound receiving hole 1192, the upper side surface US, lower side surface LS, and rear side surface FE of the sound-emitting portion 11 are used as references. In some embodiments, the second sound receiving hole 1192 can be located on the outer side surface OS of the sound-emitting portion 11. In some embodiments, to avoid the distance between the second sound receiving hole 1192 and the user's antihelix being too close, which could affect the sound reception quality, the distance d6 between the second sound receiving hole 1192 and the rear side surface FE can be 8 mm to 12 mm. Preferably, the distance d6 between the second sound receiving hole 1192 and the rear side surface FE is 9 mm to 10 mm. To prevent the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 from not pointing toward the user's mouth, the distance between the second sound receiving hole 1192 and the upper side US or the lower side LS of the sound-emitting portion 11 should not be too large or too small. The distance d5 between the second sound receiving hole 1192 and the upper side US of the sound-emitting portion 11 can be 1mm-3mm, or the distance d8 between the second sound receiving hole 1192 and the lower side LS can be 4mm-8mm. Preferably, in some embodiments, the distance d5 between the second sound receiving hole 1192 and the upper side US is 2mm-2.5mm, or the distance d8 between the second sound receiving hole 1192 and the lower side LS can be 6mm-8mm. To prevent the distance between the second sound receiving hole 1192 and the first sound receiving hole 1191 from being too small, in some embodiments, the distance d7 between the second sound receiving hole 1192 and the front side CE is 8mm-12mm. It should be noted that, in this specification, the distance from the second sound hole 1192 to the upper side, front side, rear side and lower side of the sound-emitting part 11 may refer to the distance from the center of the opening of the second sound hole 1192 on the outer surface of the shell of the sound-emitting part 11 to the upper side, front side or rear side of the sound-emitting part 11.When the side surface (e.g., the upper side surface, the front side surface, the rear side surface, or the lower side surface) of the sound-emitting portion 11 is a plane, the distance is the distance from the center of the opening of the second sound receiving hole 1192 on the outer surface of the housing of the sound-emitting portion 11 to the plane. When the side surface of the sound-emitting portion 11 is a curved surface, the distance may be the distance from the center of the opening of the second sound receiving hole 1192 on the outer surface of the housing of the sound-emitting portion 11 to a tangent plane of the curved surface. In this specification, the cross-section corresponding to the upper side surface of the sound-emitting part 11 may refer to a plane parallel to the XZ plane (or coordinate system) shown in Figure 16B and tangent to the upper side surface of the sound-emitting part 11. Similarly, the cross-section corresponding to the lower side surface of the sound-emitting part 11 may refer to a plane parallel to the XZ plane (or coordinate system) shown in Figure 16B and tangent to the lower side surface of the sound-emitting part 11. The cross-section corresponding to the front side surface of the sound-emitting part 11 may refer to a plane parallel to the YZ plane (or coordinate system) shown in Figure 16A and tangent to the front side surface of the sound-emitting part 11. The cross-section corresponding to the rear side surface of the sound-emitting part 11 may refer to a plane parallel to the XZ plane (or coordinate system) shown in Figure 16A and tangent to the rear side surface of the sound-emitting part 11.

[0090] FIG17 is a schematic diagram illustrating an exemplary positional relationship between the first sound receiving hole 1191, the second sound receiving hole 1192, and the user's mouth according to some embodiments of this specification. As shown in FIG17 , in some embodiments, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 can point toward the user's mouth so that the first sound receiving hole 1191 and the second sound receiving hole 1192 have a good sound receiving effect. As shown in FIG17 , point O can represent the position of the second sound receiving hole 1192, points P and P′ respectively represent two different positions of the first sound receiving hole 1191, and point Q represents the position of the user's mouth. In some embodiments, the angle between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the line connecting the first sound receiving hole 1191 and the user's mouth Q is approximately 150°, that is, the angle OPQ and / or the angle OP′Q are approximately 150°. As an example only, in some embodiments, the angle OPQ or the angle OP′Q may be between 140° and 180°, that is, the first sound receiving hole 1191 , the second sound receiving hole 1192 and the user's mouth may be roughly located on the same straight line.

[0091] FIG18 is a schematic diagram of exemplary wearing of headphones according to other embodiments of this specification.

[0092] When the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 points to the user's face (for example, when located in the middle area between the sagittal axis S and the vertical axis T in FIG18 ), the first microphone and the second microphone can have a better sound receiving effect. In particular, when the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 points to the area between the user's mouth and the bottom end point of the mandible, the sound receiving effect of the first microphone and the second microphone is relatively good. Based on this, in some embodiments, in order to improve the sound receiving effect of the earphone 10, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 can be made to point to or approximately point to the area between the user's mouth and the bottom end point of the mandible. In some embodiments, the bottom end point of the mandible of the user may refer to the point on the user's mandible that is farthest from the user's ear.

[0093] Referring to Figure 18, when the earphone 10 is in the worn state, the user's mandibular bottom endpoint may have a fifth projection point Q' on the user's sagittal plane, and the centroid of the projection of the user's ear canal opening on the sagittal plane (for example, the dotted area 1015 in Figure 18) is B. Since at least part of the sound-emitting part 11 of the earphone 10 needs to extend into the user's concha cavity when worn, the line connecting the fifth projection point Q' and the centroid B of the projection of the user's ear canal opening on the sagittal plane can reflect the relative positional relationship between the sound-emitting part 11 and the user's mandibular bottom endpoint to a certain extent.

[0094] Continuing with FIG18 , the first sound receiving hole 1191 may have a first projection point P on the user's sagittal plane, and the second sound receiving hole 1192 may have a second projection point O on the user's sagittal plane. In some embodiments, in order to ensure that the first sound receiving hole 1191 and the second sound receiving hole 1192 have better directivity, that is, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 points to the area between the user's mouth and the bottom end point of the mandible, the 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 on the sagittal plane may be no greater than 45°. In some embodiments, the 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 on the sagittal plane may be 6°-35°. In this case, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 can point to the area near the user's mouth. Preferably, the 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 on the sagittal plane can be 10°-25°. At this time, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 can point more accurately to the user's mouth.

[0095] Taking into account that when the line between the first projection point P of the first sound receiving hole 1191 in the sagittal plane and the second projection point O of the second sound receiving hole 1192 in the sagittal plane points to the area between the user's mouth and the end point of the bottom of the mandible, the first microphone and the second microphone can have a better sound receiving effect. Here, the distribution position of the first projection point P and the second projection point O is further explained with reference to the user's vertical axis. Continuing to refer to Figure 18, in order to make the line between the first projection point P and the second projection point O point to the area between the user's mouth and the end point of the bottom of the mandible, so as to better obtain the sound of the user when speaking, accordingly, the line between the first projection point P and the second projection point O here has a corresponding critical direction, for example, the sagittal axis S and the vertical axis T shown in Figure 18, wherein, when the line between the first projection point P and the second projection point O is in the coordinate system ST, it can ensure that the first microphone and the second microphone can collect the sound of the user when speaking. Here, the critical direction is explained in conjunction with the wearing state of the earphones. As shown in FIG18 , the mouth is located at the lower left of the ear. If the line connecting the first projection point P and the second projection point O points to the upper left, upper, lower right, upper right or right of the ear, the sound signal of the user speaking obtained by the first microphone and the second microphone is extremely small. Therefore, the line connecting the first projection point P and the second projection point O points to the left side of the ear as a critical direction, and the line connecting the first projection point P and the second projection point O points to the lower side of the ear as a critical direction. Based on the above description, it can be understood that the critical direction mentioned in the embodiments of this specification is used to represent the critical value of the line connecting the first projection point P and the second projection point O (or the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192). For example, as shown in FIG18 , when the line connecting the first projection point P and the second projection point O points between the two critical directions, the first microphone and the second microphone can have better directivity. Here, the sagittal axis S and the vertical axis T of the user represent the above two critical directions. Based on this, in some embodiments, the angle θ2 between the line connecting the first projection point P and the second projection point O and the user's vertical axis can be less than 90°. To ensure that the line connecting the first projection point P and the second projection point O points toward an area near the user's mouth or the bottom of the mandible, thereby improving the sound pickup quality of the first microphone and the second microphone when capturing the user's speech, in some embodiments, the angle θ2 between the line connecting the first projection point P and the second projection point O and the user's vertical axis can be in the range of 20°-80°. Preferably, the angle θ2 between the line connecting the first projection point P and the second projection point O and the user's vertical axis can be in the range of 40°-70°, in which case the line connecting the first projection point P and the second projection point O points toward the user's mouth or the bottom of the mandible. Preferably, the angle θ2 between the line connecting the first projection point P and the second projection point O and the user's vertical axis can be in the range of 42°-65°, in which case the line connecting the first projection point P and the second projection point O can more accurately point toward the user's mouth area.

[0096] FIG19 is a schematic diagram of exemplary wearing of headphones according to other embodiments of this specification.

[0097] To further illustrate the distribution of the first sound receiving hole 1191 and the second sound receiving hole 1192 in the earphone, the following description is made in conjunction with the user's coronal axis R. If the angle between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the coronal axis is too small, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 can be approximately regarded as pointing to the left or right side of the human head, resulting in poor sound quality when the microphone is capturing the user's speech. If the angle between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the coronal axis is too large, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 points directly to the user's head, similarly resulting in poor sound quality when the microphone is capturing the user's speech. In order to ensure that the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 can point to the front of the human face as much as possible, the angle between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the user's coronal axis (such as the R axis in Figure 18, which is perpendicular to the user's sagittal plane (ST plane)) can be set between -30° and 135° to ensure that the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 has an area that can point to the front of the human face. For more explanation on the angle between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the user's coronal axis, please refer to Figure 19 and its related description.

[0098] Referring to FIG. 19 , FIG. 19 illustrates the relative relationship between the user's head and the corresponding coronal and sagittal axes of the user, wherein reference numeral 20 may represent the user's head, and 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 rays L3 and L4 may represent the critical direction of the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192. That is, when the direction of the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 is between rays L3 and L4, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 may point toward the front of the user's face. In some embodiments, the angle α1 between ray L3 and the coronal axis R is approximately 30°, and the angle α2 between ray L4 and the sagittal axis S is approximately 45°. Based on this, the angle α3 between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the user's coronal axis R can be between -30° and 135°. Preferably, the angle between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the user's coronal axis can be between -50° and 125°. In this case, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 points to the area around the user's mouth. More preferably, the angle between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the user's coronal axis can be between -90° and 115°. In this case, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 points to the user's mouth. When the angle between the first sound receiving hole 1191 and the second sound receiving hole 1192 and the user's coronal axis is -90°, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 is parallel to the user's sagittal plane. It should be noted that the angle here is determined with the clockwise direction as positive.

[0099] FIG20 is a schematic diagram of exemplary wearing of headphones according to other embodiments of this specification.

[0100] 20 , the first sound receiving hole 1191 may have a first projection point P on the user's sagittal plane, and the second sound receiving hole 1192 may have a second projection point O on the user's sagittal plane. The angle between the line connecting the first projection point P and the second projection point O and the long axis X of the projection shape of the sound-emitting part 11 on the sagittal plane can be expressed as θ3. It can be understood that when the earphone 10 is in a worn state, the position of the sound-emitting part 11 relative to the ear can be considered unchanged. At this time, the angle θ4 formed by the line connecting the fifth projection point Q′ of the user's mandibular bottom end point on the user's sagittal plane and the centroid B of the projection of the user's ear canal opening on the sagittal plane and the long axis X of the projection shape of the sound-emitting part 11 on the sagittal plane can be approximately considered unchanged. The closer the angle θ3 is to θ4, the better the directivity of the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192. Based on this, in some embodiments, the sound receiving effects of the first sound receiving hole 1191 and the second sound receiving hole 1192 can be adjusted by controlling 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 projection shape of the sound-emitting part 11 on the sagittal plane.

[0101] As shown in FIG20 , the sagittal axis S and the vertical axis T can represent the critical direction of the line connecting the first projection point P and the second projection point O relative to the long axis direction X of the projection shape of the sound-emitting part 11 on 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 reception effect of the first microphone and the second microphone when collecting the user's speech can be guaranteed. Specifically, in some embodiments of the present specification, when the earphone 10 is in a worn state, the angle β1 between the long axis direction X and the sagittal axis S can be approximately 20°, the angle β2 between the long axis direction X and the vertical axis T can be approximately 45°, and the angle θ4 formed by the line connecting the fifth projection point Q′ of the user's mandibular bottom endpoint on the user's sagittal plane and the centroid B of the projection of the user's ear canal opening on the sagittal plane and the long axis direction X of the projection shape of the sound-emitting part 11 on the sagittal plane can be between 50° and 75°. Based on this, in some embodiments, if the negative direction of the long axis direction X shown in FIG. 20 is 0° and the counterclockwise direction is positive, the angle formed by the line connecting the first projection point P and the second projection point O relative to the long axis direction X of the projection shape of the sound-emitting part 11 on the sagittal plane is expressed, then 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 projection shape of the sound-emitting part 11 on the sagittal plane can be between 20° and 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 projection shape of the sound-emitting part 11 on the sagittal plane can be 45° to 70°. In this case, the line connecting the first projection point P and the second projection point O can more accurately point to the area between the user's mouth and the end point of the mandibular bottom.

[0102] Figure 21A is a schematic diagram of an exemplary wearing method of an earphone according to some other embodiments of this specification. Figure 21B is a schematic diagram of the angle between the line connecting the first sound receiving hole and the second sound receiving hole and the outer side surface of the sound-emitting part according to some embodiments of this specification.

[0103] Referring to Figures 21A and 21B, in some embodiments, the angle between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the outer side surface of the sound-emitting portion 11 can be represented as θ5. In some embodiments, the outer side surface of the sound-emitting portion 11 can be a plane. In this case, the angle between the line connecting the first sound receiving hole 1191 and the second sound receiving hole and the outer side surface is the angle between the line connecting the first sound receiving hole 1191 and the second sound receiving hole and the plane. In some embodiments, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 can be a curved surface. In this case, the angle between the line connecting the first sound receiving hole 1191 and the second sound receiving hole and the outer side surface is the angle between the plane tangent to the curved surface of the outer side surface. For example, when the outer side surface is a plane, in some embodiments, the outer side surface of the sound-emitting portion 11 can be represented by four points M1, M2, M3, and M4 located on the outer side surface. In some embodiments, the first sound receiving hole 1191 and the second sound receiving hole 1192 can be located on the same side surface of the sound-emitting portion 11 or on different sides. For example, in some embodiments, the first sound receiving hole 1191 and the second sound receiving hole 1192 may both be located on the outer side of the sound-emitting portion 11. For another example, in some embodiments, the first sound receiving hole 1191 may be located on the front side of the sound-emitting portion 11, and the second sound receiving hole 1192 may be located on the outer side of the sound-emitting portion 11. For another example, in some embodiments, the first sound receiving hole 1191 may be located on the lower side of the sound-emitting portion 11, and the second sound receiving hole 1192 may be located on the outer side of the sound-emitting portion 11.

[0104] As shown in Figure 21B , the first sound receiving hole 1191 has a projection point M5 on the outer surface M1M2M3M4, and the second sound receiving hole 1192 has a projection point M6 on the outer surface M1M2M3M4. The angle θ5 formed by the line connecting the first and second sound receiving holes 1191, 1192, and the outer surface of the sound-emitting portion 11 can refer to the angle formed by the line connecting the projection points M5 and M6 and the line connecting the first and second sound receiving holes 1191, 1192.

[0105] It can be understood that the angle θ5 can reflect the relative positional relationship between the first sound receiving hole 1191 and the second sound receiving hole 1192 in the thickness direction of the sound-emitting portion 11, and can also reflect, to a certain extent, the directionality of the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 relative to the user's mouth. In some embodiments, to ensure that the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 has better directionality and thus ensures that the first sound receiving hole 1191 and the second sound receiving hole 1192 have better sound receiving effect, the angle θ5 between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the outer surface of the sound-emitting portion 11 can be controlled to be between 0° and 60°. In this case, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 can be roughly directed toward the front area of ​​the user's face, thereby ensuring that the first microphone and the second microphone can have better sound receiving effect. In some embodiments, the angle θ5 formed between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the outer surface of the sound-emitting portion 11 can be 10°-50°. In this case, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 can be roughly directed toward the area around the user's mouth, thereby improving the sound reception effect of the first microphone and the second microphone. Preferably, the angle θ5 formed between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the outer surface of the sound-emitting portion 11 can be 25°-38°. In this case, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 can be directed toward the user's mouth, thereby further improving the sound reception effect of the first microphone and the second microphone.

[0106] In some embodiments, to enhance the sound reception of the first and second sound receiving holes 1191, 1192, they may need to have larger dimensions. In some embodiments, the diameters of the first and second sound receiving holes may be greater than 0.8 mm. In some embodiments, the diameters of the first and second sound receiving holes may be greater than 0.85 mm to further enhance the sound reception of the first and second sound receiving holes 1191, 1192. In some embodiments, the diameters of the first and second sound receiving holes may be 0.9 mm.

[0107] In some embodiments, to improve the dust and water resistance of the first and second sound receiving holes 1191, 1192, the area of ​​the first and second sound receiving holes 1191, 1192 should not be too large. Based on this, in some embodiments, to simultaneously ensure both the sound reception and dust and water resistance of the first and second sound receiving holes 1191, 1192, the diameters of the first and second sound receiving holes 1191, 1192 can be between 0.8 mm and 3 mm. For example, in some embodiments, the diameters of the first and second sound receiving holes 1191, 1192 can be between 0.8 mm and 2.5 mm to further improve the dust and water resistance of the first and second sound receiving holes 1191, 1192. Preferably, the diameters of the first and second sound receiving holes 1191, 1192 can be between 0.85 mm and 1.5 mm to further improve the sound reception and dust and water resistance of the first and second sound receiving holes 1191, 1192. It should be noted that, in this specification, the first sound receiving hole 1191 and the second sound receiving hole 1192 may have the same or different apertures. When the first sound receiving hole 1191 and / or the second sound receiving hole 1192 are irregularly shaped, their diameters may be understood as the maximum inner diameter or the average inner diameter.

[0108] In some embodiments, considering that an excessive depth of the first and second sound receiving holes 1191, 1192 (e.g., greater than 8 mm) may cause sound loss during transmission to the first and second microphones, and may also make mid- and high-frequency sounds sharper, to ensure the sound reception of the first and second sound receiving holes 1191, 1192, the depth of the first and second sound receiving holes 1191, 1192 can be less than 4 mm. In some embodiments, the depth of the first and second sound receiving holes 1191, 1192 can refer to the distance from their openings to the corresponding microphones. In some embodiments, when the first and second microphones are positioned close to the housing, the depth of the first and second sound receiving holes 1191, 1192 can be equal to the thickness of the housing. For example, in some embodiments, the depth of the first and second sound receiving holes 1191, 1192 can both be less than 2.5 mm to further reduce sound loss during transmission to the first and second microphones and improve the reception of mid- and high-frequency sounds.

[0109] In some embodiments, to maintain the sound reception effect of the first sound receiving hole 1191 and the second sound receiving hole 1192, the depths of the first sound receiving hole 1191 and the second sound receiving hole 1192 can be consistent. If the depths of the first sound receiving hole 1191 and the second sound receiving hole 1192 are inconsistent, some sound will propagate an additional distance, resulting in inconsistent noise response of the first sound receiving hole 1191 and the second sound receiving hole 1192, thus affecting the noise reduction effect and call quality of the earphone 10.

[0110] In some embodiments, the first sound receiving hole 1191 and the second sound receiving hole 1192 may be provided with a dustproof and waterproof net. The first sound receiving hole 1191 and the second sound receiving hole 1192 may be sealed, for example, by a silicone sleeve and double-sided tape.

[0111] In some embodiments, the headset 10 can also be designed with a corresponding adjustment algorithm to ensure that the low-frequency boost is noticeable at low volumes while maintaining no change at high volumes, thereby preventing distortion and speaker damage. By adjusting the algorithm settings, users can independently adjust the headset sound effects.

[0112] FIG22 is a schematic diagram of an exemplary structure of headphones according to other embodiments of this specification.

[0113] 22 , in some embodiments, the sound-emitting portion 11 may further include at least one sound-emitting hole (e.g., sound-emitting hole 111a) and at least one pressure-relief hole (e.g., pressure-relief hole 111c), wherein the sound-emitting hole 111a is disposed on the inner side of the sound-emitting portion 11, and the pressure-relief hole 111c is disposed on the lower side of the sound-emitting portion 11. In some embodiments, the pressure-relief hole 111c may also be located on any of the upper side, front side, rear side, or outer side of the sound-emitting portion. In some embodiments, the distances between the first sound receiving hole 1191 and the pressure-relief hole 111c and the sound-emitting hole 111a need to satisfy a certain relationship to prevent the sound emitted from the sound-emitting hole 111a and the pressure-relief hole 111c from echoing at the first sound receiving hole 1191 and the second sound receiving hole 1192.

[0114] Referring to Figure 22, in some embodiments, the distance between the first sound receiving hole 1191 and the pressure relief hole 111c can be represented as d1, and the distance between the first sound receiving hole 1191 and the sound outlet hole 111a can be represented as d2. In some embodiments, the first sound receiving hole 1191, which primarily receives sound, can be positioned near the acoustic null point (e.g., the area where sound leakage between the sound outlet hole 111a and the pressure relief hole 111c cancels out) to reduce speaker interference with the first microphone. Specifically, in some embodiments, to position the first sound receiving hole 1191 near the acoustic null point, the difference between d1 and d2 can be less than 10 mm. The smaller the difference between d1 and d2, the more effectively sound leakage between the sound outlet hole 111a and the pressure relief hole 111c cancels out. In some embodiments, the difference between d1 and d2 can be less than 6 mm. Preferably, the difference between d1 and d2 can be less than 4 mm to further reduce speaker interference with the first microphone.

[0115] FIG23 is a schematic diagram of an exemplary cross-sectional structure of the sound-emitting portion of an earphone according to other embodiments of this specification.

[0116] 23 , in some embodiments, a first acoustic resistance net 1193 may be provided in the first sound receiving hole 1191, and a second acoustic resistance net 1192 may be provided in the second sound receiving hole 1192. The first acoustic resistance net 1193 and the second acoustic resistance net 1194 may be structures that have a certain acoustic resistance effect but do not completely block sound propagation. In some embodiments, the first acoustic resistance net 1193 and / or the second acoustic resistance net 1194 may include a gauze mesh and / or a steel mesh. In some embodiments, the first acoustic resistance net 1193 and the second acoustic resistance net 1194 may be respectively fixed to the first sound receiving hole 1191 and the second sound receiving hole 1192 using double-sided tape or glue. In some embodiments, the first acoustic resistance net 1193 and the second acoustic resistance net 1194 may improve the waterproof and dustproof performance of the first sound receiving hole 1191 and the second sound receiving hole 1192.

[0117] 23 , in some embodiments, the distance between the first acoustic resistance net 1193 and the outer surface of the shell of the sound-emitting portion 11 where the first acoustic resistance net 1193 is located can be represented as d3, and the distance between the second acoustic resistance net 1194 and the outer surface of the shell of the sound-emitting portion 11 where the second acoustic resistance net 1194 is located can be represented as d4. It should be noted that, in this specification, d3 and d4 can be the same or different. For example, when the distances d3 and d4 are the same, the propagation efficiency of sound through the first sound receiving hole 1191 and the second sound receiving hole 1192 can be approximately the same, ensuring the sound receiving effect of the first microphone and the second microphone. For example, in some embodiments, the distance d3 between the first acoustic resistance net 1193 and the outer surface of the shell of the sound-emitting portion 11 can be between 0.5 mm and 2 mm, and the distance d4 between the second acoustic resistance net 1194 and the outer surface of the shell of the sound-emitting portion 11 can also be between 0.5 mm and 2 mm. In some embodiments, the distance d3 between the first acoustic resistance net 1193 and the outer surface of the shell of the sound-emitting part 11 can be between 0.5mm-1.5mm, and the distance d4 between the second acoustic resistance net 1194 and the outer surface of the shell of the sound-emitting part 11 can also be between 0.5mm-1.5mm.

[0118] In some embodiments, to ensure a relatively flat frequency response of the sound received by the first and second microphones and improve the signal-to-noise ratio of the sound received by the first and second microphones, the first and second acoustic resistance nets 1193 and 1194 need to have a certain acoustic resistance, for example, greater than 45 Mrayls. For example, as the acoustic resistance of the first and second acoustic resistance nets 1193 and 1194 increases, the corresponding resonant frequency at the first and second microphones shifts toward lower frequencies, and the peak value of the resonant peak gradually flattens. Furthermore, to ensure sound propagation efficiency at the first and second sound receiving holes 1191 and 1192 and thus ensure the sound reception quality of the first and second microphones, the acoustic resistance of the first and second acoustic resistance nets 1193 and 1194 should not be too large. Therefore, in some embodiments, to ensure the sound reception quality of the first and second sound receiving holes 1191 and 1192, the acoustic resistance of the first and second acoustic resistance nets 1193 and 1194 can be set between 45 Mrayls and 320 Mrayls. Preferably, the acoustic impedance of the first acoustic impedance net 1193 and the second acoustic impedance net 1194 can be 80 Mrayls-260 Mrayls. In this case, the frequency response of the sound received at the first microphone or the second microphone is relatively flat, the quality of the sound signal collected at the first microphone or the second microphone is high, and it can also ensure that the first microphone or the second microphone has a high sensitivity to the sound signal. More preferably, the acoustic impedance of the first acoustic impedance net 1193 and the second acoustic impedance net 1194 can be 120 Mrayls-200 Mrayls. Here, while ensuring that the first microphone or the second microphone has a high sensitivity to the sound signal, the frequency response of the sound received at the first microphone or the second microphone is flatter, thereby improving the quality of the sound signal collected at the first microphone or the second microphone. It should be noted that the acoustic impedance measurement of the first acoustic impedance net 1193 and the second acoustic impedance net 1194 can be measured using ultrasonic echo measurement, or determined by multiplying the density of the acoustic impedance net by the speed of sound.

[0119] Because the denser the mesh of the acoustic resistance net, the greater the acoustic resistance corresponding to the acoustic resistance net, the more obvious the suppression effect on the user's voice from the user's mouth, and the lower the sound intensity received by the microphone. Based on this, the parameters of the first acoustic resistance net 1193 and the second acoustic resistance net 1194 (such as mesh density, mesh size, thickness, etc.) can be designed so that the first acoustic resistance net 1193 and the second acoustic resistance net 1194 have a preset acoustic resistance range.

[0120] For example, in some embodiments, the first acoustic resistance net 1193 and / or the second acoustic resistance net 1194 may include a plurality of holes, wherein the aperture of each hole may be within a range of 15 μm to 51 μm. Preferably, in some embodiments, to ensure the waterproof and dustproof performance of the first sound receiving hole 1191 and the second sound receiving hole 1192 while taking into account the sound propagation efficiency, the aperture of each hole in the first acoustic resistance net 1193 and the second acoustic resistance net 1194 may be controlled to be within a range of 18 μm to 44 μm.

[0121] In some embodiments, the porosity of the first acoustic resistance mesh 1193 and / or the second acoustic resistance mesh 1194 can be in the range of 11%-18%, where the term "porosity" can be understood as the ratio of the area of ​​the openings in the acoustic resistance mesh to the total area of ​​the acoustic resistance mesh. A larger porosity indicates a greater number of openings per unit area, given a given size of a single opening, and a lower acoustic resistance of the acoustic resistance mesh. In some embodiments, to ensure that the acoustic resistance of the first acoustic resistance mesh 1193 and / or the second acoustic resistance mesh 1194 is between 45 Mrayls and 320 Mrayls, the porosity of the first acoustic resistance mesh 1193 and / or the second acoustic resistance mesh 1194 can be in the range of 11%-18%. Similarly, in some embodiments, in order to make the acoustic impedance of the first acoustic resistance mesh 1193 and / or the second acoustic resistance mesh 1194 between 45 Mrayls and 320 Mrayls, the thickness of the first acoustic resistance mesh 1193 and / or the second acoustic resistance mesh 1194 can be in the range of 55μm-108μm.

[0122] FIG24 is a schematic diagram of exemplary wearing of headphones according to other embodiments of this specification.

[0123] 24 , in some embodiments, when the earphone 10 is worn, at least a portion of the sound-emitting portion 11 can cover the user's antihelix region (e.g., located at the triangular fossa, the superior crus of the antihelix, the inferior crus of the antihelix, or the antihelix, as shown in FIG2 , where the sound-emitting portion 11C is located relative to the ear). Similarly, in some embodiments, to ensure good sound reception by the first and second microphones, the line connecting the first and second sound receiving holes 1191 and 1192 can be directed toward the user's mouth in this worn state.

[0124] In some embodiments, when the earphone 10 is worn with at least a portion of the sound-emitting portion 11 covering the user's antihelix (hereinafter referred to as the second wearing state), the first sound receiving hole 1191 can be located on the earphone 10 near the mouth, thereby improving the sound reception effect of the first microphone when collecting sound emitted by the user's mouth. Similar to the wearing state in which at least a portion of the sound-emitting portion 11 extends into the user's cavum concha, when the earphone 10 is worn with at least a portion of the sound-emitting portion 11 covering the user's antihelix, a certain distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 is also required to facilitate subsequent signal processing. Furthermore, since the earphone 10 is worn with at least a portion of the sound-emitting portion 11 covering the user's antihelix area, at least a portion of the sound-emitting portion 11 will abut the inner wall of the user's auricle (e.g., the inner contour 1014). While ensuring that the first sound receiving hole 1191 is positioned close to the user's mouth and that there is a certain distance between the first sound receiving hole 1191 and the second sound receiving hole 1192, the second sound receiving hole 1192 may be closer to the inner contour 1014. This may cause the inner contour 1014 to reflect the sound waves generated by the user's speech or external sound waves when they are transmitted to the inner contour 1014. This may cause the sound received by the second microphone to be louder than the sound received by the first microphone, especially in the frequency range of 3kHz-4kHz, thereby affecting the subsequent noise reduction and sound reception effects. Based on the above issues, in some embodiments, the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192, as well as the distance between the second sound receiving hole 1192 and the inner contour 1014 of the user's auricle, can be adjusted to ensure the noise reduction and sound reception effects of the earphone. As shown in FIG24 , when the earphone 10 is in the second wearing state, the first sound receiving hole 1191 may have a first projection point P on the user's sagittal plane (e.g., the TS plane shown in FIG24 ), and the second sound receiving hole 1192 may have a second projection point O on the user's sagittal plane. In some embodiments, in order to more clearly describe the positional relationship between the first sound receiving hole 1191, the second sound receiving hole 1192, and the inner contour 1014 of the user's auricle, the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 may be represented by a first distance OP between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the second projection point O of the second sound receiving hole 1192 on the sagittal plane. In some embodiments, the extension line of the line connecting the first projection point P of the first sound receiving hole in the user's sagittal plane and the second projection point O of the second sound receiving hole in the sagittal plane has an intersection C with the projection of the inner contour 1014 of the user's auricle in the sagittal plane, and the distance between the second sound receiving hole 1192 and the inner contour 1014 of the auricle can be represented by the second distance OC between the second projection point O of the second sound receiving hole 1192 in the sagittal plane and the intersection C.In some embodiments, to ensure that the first microphone and the second microphone in the headset 10 have good sound reception and noise reduction effects 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 C can be set between 1.8 and 4.4. To reduce the influence of the inner contour of the auricle on the second microphone, the distance between the second sound receiving hole 1192 and the inner contour of the auricle can be increased, and the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 can be increased to facilitate subsequent signal processing. 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 C can be set between 2.5 and 3.8. Preferably, when the earphone is worn in the same position, to further reduce the effect of the antihelix on the second microphone, the distance between the second sound receiving hole 1192 and the antihelix can be increased, while the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 can be increased. This facilitates subsequent signal processing. 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 can be between 2.8 and 3.5. To reduce the effect of the antihelix on the second microphone and facilitate subsequent signal processing, the distance between the second sound receiving hole 1192 and the antihelix can be further increased, while the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 can be further increased. 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 can be between 3.0 and 3.3.

[0125] In some embodiments, when the second sound receiving hole 1192 is relatively close to the inner contour 1014 of the auricle, the sound waves generated by the user's speech or external sound waves may be reflected by the inner contour 1014 of the auricle when they are transmitted to the inner contour 1014 of the auricle. This may cause the sound received by the second microphone to be louder than the sound received by the first microphone within the frequency range of 3kHz-8kHz, thus affecting the subsequent noise reduction and sound reception effects. In addition, due to the limited size of the sound-emitting portion 11, it is necessary to ensure a large distance between the first sound receiving hole 1191 and the second sound receiving hole 1192. When the second sound receiving hole 1192 is relatively far from the inner contour 1014 of the auricle, the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 will become smaller, affecting the subsequent signal processing.

[0126] 25A-25D are schematic diagrams of frequency response curves corresponding to different distances between the second projection point O and the intersection point C according to some embodiments of this specification.

[0127] Referring to Figure 25A , curves 2501 and 2502 are schematic diagrams of the frequency response curves of the first microphone and the second microphone when a first distance OP between the first projection point P and the second projection point O is 20 mm, and a second distance OC between the second projection point O and the intersection point C is 8 mm. In particular, the second sound receiving hole 1192 is located on the upper side of the sound-emitting portion 11. As can be seen from Figure 25A , when the second sound receiving hole 1192 is located on the upper side of the sound-emitting portion 11 and the second distance OC between the second projection point O and the intersection point C is 8 mm, the first microphone performs better than the second microphone across the entire frequency range, and the first and second microphones respond to sound more consistently, resulting in relatively ideal overall sound reception.

[0128] Referring to Figure 25B , curves 2503 and 2504 are schematic diagrams of the 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. Similar to the scenario shown in Figure 25A , the second sound receiving hole 1192 is located on the upper side of the sound-emitting portion 11. As can be seen from Figure 25B , when the second sound receiving hole 1192 is located on the upper side of the sound-emitting portion 11 and the second distance OC between the second projection point O and the intersection point C is 6 mm, the difference in amplitude between the first microphone and the second microphone in the frequency band above 4 kHz is already minimal. At this point, the overall microphone assembly's ability to pick up the user's voice from their mouth is affected, and some high-frequency components may be lost.

[0129] Referring to Figure 25C , curves 2505 and 2506 are schematic diagrams of the frequency response curves of the first and second microphones 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. Similar to the scenario shown in Figures 25A and 25B , the second sound receiving hole 1192 is located on the upper side of the sound-emitting portion 11. As can be seen in Figure 25C , when the second sound receiving hole 1192 is located on the upper side of the sound-emitting portion 11 and the second distance OC between the second projection point O and the intersection point C is 4 mm, the difference in the sound amplitudes between the first and second microphones in the 2.2 kbps-4 kbps frequency band is significantly reduced, further narrowing the speech frequency band with good sound reception.

[0130] Referring to Figure 25D , curves 2507 and 2508 are schematic diagrams of the 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. Similar to the scenario shown in Figures 25A-25D , the second sound receiving hole 1192 is located on the upper side of the sound-emitting portion 11. As can be seen in Figure 25D , when the second sound receiving hole 1192 is located on the upper side of the sound-emitting portion 11 and the second distance OC between the second projection point O and the intersection point C is 2 mm, the amplitude of the speech picked up by the first microphone and the second microphone in the frequency band above 2.2 kHz is essentially the same, and the microphone assembly's ability to pick up the user's voice from their mouth is significantly affected.

[0131] In some embodiments, to ensure that the first microphone and the second microphone have good sound reception and noise reduction effects, the distance between the second projection point O of the second sound receiving hole 1192 in the sagittal plane and the intersection C can be set between 2 mm and 10 mm. For example, in order to reduce the reflection effect of the inner concha 1014 of the auricle on sound waves and improve the sound reception effect of the first microphone and the second microphone, the distance between the second sound receiving hole 1192 and the inner concha 1014 of the auricle can be increased. In some embodiments, the distance between the second projection point O and the intersection C can be set between 4 mm and 10 mm. In order to further reduce the reflection effect of the inner concha 1014 of the auricle on sound waves and further improve the sound reception effect of the first microphone and the second microphone, the distance between the second sound receiving hole 1192 and the inner concha 1014 of the auricle can be further increased. Preferably, the distance between the second projection point O and the intersection C can be set between 6 mm and 10 mm. When the second sound receiving hole 1192 is set at a position farther away from the inner concha 1014 of the auricle, the reflection of the sound waves by the inner concha 1014 of the auricle will hardly affect the second sound receiving hole 1192. Preferably, the distance between the second projection point O and the intersection point C can be between 8mm-10mm.

[0132] It should be noted that the above description is mainly aimed at the situation where the second sound receiving hole 1192 is located on the upper side of the sound-emitting part 11. When the second sound receiving hole 1192 is set on the outer side of the sound-emitting part 11, since the second sound receiving hole 1192 is basically in the same plane as the user's auricle, the distance between the second projection point O and the intersection point C has no significant effect on the sound receiving effect of the second microphone. At this time, it is only necessary to ensure that the user's auricle is not significantly higher than the location of the second sound receiving hole 1192.

[0133] Continuing to refer to Figure 24, in the second wearing state, the distance between the first sound receiving hole 1191 and the user's mouth (refer to point Q in Figure 24) is smaller than the distance between the second sound receiving hole 1192 and the user's mouth to facilitate subsequent signal processing. As shown in Figure 24, when the earphone 10 is in the second wearing state, the first sound receiving hole 1191 can have a first projection point P on the user's sagittal plane (for example, the TS plane shown in Figure 24), the second sound receiving hole 1192 can have a second projection point O on the user's sagittal plane, and the third projection point Q is used to represent the projection of the user's mouth (for example, the lip bead) on the user's sagittal plane. The user's mouth has a third projection point Q on the user's sagittal plane, wherein the distance between PQ is smaller than the distance between OQ.

[0134] In some embodiments, the line connecting the first projection point P of the first sound receiving hole 1191 on the user's sagittal plane and the second projection point O of the second sound receiving hole 1192 on the same sagittal plane is approximately oriented toward the third projection point Q of the user's mouth on the same sagittal plane. This allows a directivity algorithm to be constructed based on the sound received by the first and second microphones, enhancing the clarity of the received user's voice. In some embodiments, the line PQ connecting the first projection point P and the third projection point Q can be at a certain angle relative to the line OQ connecting the second projection point O and the third projection point Q. To ensure directivity of the first and second sound receiving holes 1191 and 1192, the angle between PQ and OQ can be less than 30°. In some embodiments, the angle between PQ and OQ can be between 0° and 25°. Preferably, the angle between PQ and OQ can be between 5° and 20°. For example, in some embodiments, the angle between PQ and OQ can be 0°, 3°, 9°, or 15°.

[0135] If the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 is too small, it will make it more difficult to process low-frequency signals (mainly because the phase difference of low-frequency signals will be very small), making it difficult to achieve accurate calculations. Therefore, the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192 should not be too small. For details about the distance between the first sound receiving hole 1191 and the second sound receiving hole 1192, please refer to other parts of this manual, such as Figure 7 and its corresponding content, and will not be repeated here.

[0136] FIG26 is a schematic diagram of exemplary wearing of headphones according to other embodiments of this specification.

[0137] Referring to Figure 26, when the earphone 10 is in the second wearing state, the user's mandibular bottom endpoint may have a fifth projection point Q' on the user's sagittal plane, and the centroid of the projection of the user's ear canal opening on the sagittal plane (for example, the dotted area 1015 in Figure 26) is B. The line formed by the fifth projection point Q' and the centroid B of the projection of the user's ear canal opening on the sagittal plane can reflect the relative position relationship between the sound-emitting part 11 and the user's mandibular bottom endpoint to a certain extent.

[0138] Continuing with FIG. 26 , the first sound receiving hole 1191 may have a first projection point P on the user's sagittal plane, and the second sound receiving hole 1192 may have a second projection point O on the user's sagittal plane. In some embodiments, to ensure that the first and second sound receiving holes 1191, 1192 have better directivity, that is, the line connecting the first and second sound receiving holes 1191, 1192 points toward the area between the user's mouth and the bottom of the mandible, the angle θ6 between the line connecting the first and second projection points P and O and the line connecting the fifth projection point Q' and the centroid B of the projection of the user's ear canal opening on the sagittal plane can be no greater than 45°. In some embodiments, when the earphone 10 is in the second wearing state, the angle θ6 between the line connecting the first and second projection points P and O and the line connecting the fifth projection point Q' and the centroid B of the projection of the user's ear canal opening on the sagittal plane can be 6°-35°. In this case, the line connecting the first and second sound receiving holes 1191, 1192 can point toward the area near the user's mouth. Preferably, the 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 on the sagittal plane can be 10°-25°. At this time, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 can point more accurately to the user's mouth.

[0139] Continuing with FIG. 26 , the sagittal axis S and the vertical axis T may represent the critical directions of the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192. In other words, in some embodiments of this specification, to ensure that the first microphone and the second microphone can effectively capture the sound of the user speaking, the direction of the line connecting the first sound receiving hole 1191 and the second sound receiving 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 angle θ7 with the vertical axis of the user. This angle θ7 may reflect the directionality of the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192. Based on this, in some embodiments, to ensure that the first sound receiving hole 1191 and the second sound receiving hole 1192 can capture the sound effectively, the 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°-80°. In this case, the line connecting the first projection point P and the second projection point O points toward an area near the user's mouth or the bottom end of the mandible. Preferably, the angle θ7 between the line connecting the first projection point P and the second projection point O and the vertical axis of the user can be in the range of 40°-70°. In this case, the line connecting the first projection point P and the second projection point O points to the user's mouth or the area of ​​the bottom end of the mandible. Preferably, the angle θ7 between the line connecting the first projection point P and the second projection point O and the vertical axis of the user can be in the range of 42°-65°. In this case, the line connecting the first projection point P and the second projection point O can more accurately point to the user's mouth area.

[0140] FIG27 is a schematic diagram of exemplary wearing of headphones according to other embodiments of this specification.

[0141] 27 , the projection of the sound-emitting portion 11 on the sagittal plane may include a long axis direction X and a short axis direction Y, wherein the long axis direction X may refer to the length extension direction of the sound-emitting portion 11, and the short axis direction Y may refer to the height (or width) extension direction of the sound-emitting portion 11. When the earphone 10 is in the second wearing state, the first sound receiving hole 1191 may have a first projection point P on the user's sagittal plane, and the second sound receiving hole 1192 may have a second projection point O on the user's sagittal plane. 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 projection shape of the sound-emitting portion 11 on the sagittal plane may be expressed as θ8. In some embodiments, the sound receiving effects of the first sound receiving hole 1191 and the second sound receiving hole 1192 may be controlled by controlling 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 projection shape of the sound-emitting portion 11 on the sagittal plane.

[0142] As shown in FIG27 , the sagittal axis S and the vertical axis T can represent the critical direction of the line connecting the first projection point P and the second projection point O relative to the long axis X of the projection shape of the sound-emitting part 11 on the sagittal plane. In other words, in some embodiments of this specification, the direction of the line connecting the first projection point P and the second projection point O can be between the sagittal axis S and the vertical axis T to ensure that the first microphone and the second microphone can effectively collect the sound of the user's speech. In some embodiments, the angle formed by the line connecting the first projection point P and the second projection point O relative to the long axis X of the projection shape of the sound-emitting part 11 on the sagittal plane can be represented, with the negative direction of the long axis X shown in FIG27 being 0° and the counterclockwise direction being positive. Specifically, in some embodiments of this specification, to ensure that the first microphone and the second microphone have better sound collection, the angle θ8 formed by the line connecting the first projection point P and the second projection point O and the long axis X of the projection shape of the sound-emitting part 11 on the sagittal plane can be set to between -45° and 45°. Preferably, the angle θ8 formed by the line connecting the first projection point P and the second projection point O and the long axis X of the projection shape of the sound-emitting part 11 on the sagittal plane can be -25°-30°. In this case, the line connecting the first projection point P and the second projection point O can point to the area between the user's mouth and the bottom of the mandible. More preferably, the angle θ8 formed by the line connecting the first projection point P and the second projection point O and the long axis X of the projection shape of the sound-emitting part 11 on the sagittal plane can be -20°-25°. In this case, the line connecting the first projection point P and the second projection point O can more accurately point to the area between the user's mouth and the bottom of the mandible. It should be noted that in some embodiments, the earphones can also be in the wearing state shown in Figure 28A, in which case the upper or lower side of the sound-emitting part is approximately parallel to the horizontal direction. In this case, the angle formed by the line connecting the first projection point P and the second projection point O and the long axis X of the projection shape of the sound-emitting part 11 on the sagittal plane can be 0-90°.

[0143] Similar to the wearing method in which at least a portion of the sound-emitting portion 11 extends into the user's cavum conchae, in some embodiments, when the earphone 10 is worn so that at least a portion of the sound-emitting portion 11 covers the user's antihelix region, to ensure that the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 has good directivity, the angle between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the user's coronal axis (e.g., the R axis in FIG. 27 , which is perpendicular to the user's sagittal plane (ST plane)) can be between -30° and 135°. Preferably, the angle between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 relative to the user's coronal axis can be between -50° and 125°. In this case, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 points to the area near the left and right sides of the user's mouth. Preferably, the angle between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 relative to the user's coronal axis can be between -90° and -115°. In this case, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 points to the user's mouth area. Specifically, when the angle between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 relative to the user's coronal axis is -90°, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 is parallel to the user's sagittal plane.

[0144] In some embodiments, when the earphone 10 is in the second wearing state, a coordinate system can be established based on the long axis X, short axis Y, and thickness direction Z of the sound-emitting portion 11, and the coordinates in the coordinate system can be used to represent the relative positions of the first sound receiving hole 1191 and / or the second sound receiving hole 1192 relative to the sound-emitting portion 11. For example, the Z value in the coordinate system can represent the distance of the first sound receiving hole 1191 and / or the second sound receiving hole 1192 relative to the inner side of the sound-emitting portion 11, the X value in the coordinate system can represent the distance of the first sound receiving hole 1191 and / or the second sound receiving hole 1192 relative to the front side of the sound-emitting portion 11, and the Y value in the coordinate system can represent the distance of the first sound receiving hole 1191 and / or the second sound receiving hole 1192 relative to the lower side of the sound-emitting portion 11. In some embodiments, a larger Z value in the coordinate system indicates that the first sound receiving hole 1191 is farther away from the inner side of the sound-emitting part 11; a larger X value indicates that the first sound receiving hole 1191 is farther away from the front side of the sound-emitting part 11; and a larger Y value indicates that the first sound receiving hole 1191 is farther away from the lower side of the sound-emitting part 11.

[0145] Similar to the wearing configuration in which at least a portion of the sound-emitting portion 11 extends into the user's cavum conchae, in some embodiments, when the earphone 10 is in the second wearing configuration, to ensure that the first microphone has better sound reception, the ratio of the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the front side of the sound-emitting portion 11 on the sagittal plane in the longitudinal direction X to the size of the projection of the sound-emitting portion 11 on the sagittal plane along the longitudinal direction X can be set to no greater than 0.75. That is, when the sound-emitting portion 11 is divided into four equal parts along the longitudinal direction X, the first projection point P is located in an area where X ≤ 3. To position the first sound receiving hole 1191 close to the user's mouth and improve the sound reception of the first microphone, the ratio of the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the front side of the sound-emitting portion 11 on the sagittal plane in the longitudinal direction X to the size of the projection of the sound-emitting portion 11 on the sagittal plane along the longitudinal direction X can be set to no greater than 0.5. Preferably, to position the first sound receiving hole 1191 closer to the user's mouth and thus improve the sound pickup effect of the first microphone, the ratio of the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the front side of the sound-emitting part 11 on the sagittal plane along the longitudinal axis X to the dimension of the projection of the sound-emitting part 11 on the sagittal plane along the longitudinal axis X may be no greater than 0.3. Preferably, to position the first sound receiving hole 1191 closer to the user's mouth and thus improve the sound pickup effect of the first microphone, the ratio of the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the front side of the sound-emitting part 11 on the sagittal plane along the longitudinal axis X to the dimension of the projection of the sound-emitting part 11 on the sagittal plane along the longitudinal axis X may be no greater than 0.2. Positioning the first sound receiving hole 1191 closer to the front side of the sound-emitting part also provides more options for the position of the second sound receiving hole 1192, ensuring that the second sound receiving hole maintains a specific spacing from the first sound receiving hole and that the second sound receiving hole is as far away from the antihelix as possible. Based on the above considerations, more preferably, the ratio of the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the front side of the sound-emitting part 11 on the sagittal plane along the long axis X to the dimension of the projection of the sound-emitting part 11 on the sagittal plane along the long axis X may be no greater than 0.1. Further preferably, in some embodiments, the first sound receiving hole 1191 may be located on the front side of the sound-emitting part 11. In this case, the first sound receiving hole 1191 is closer to the user's mouth in the horizontal direction, thereby improving the sound reception effect of the first microphone.

[0146] In some embodiments, to ensure that the first microphone has a better sound reception effect, the ratio of the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the lower side of the sound-emitting part on the sagittal plane in the short axis direction Y to the size of the projection of the sound-emitting part 11 on the sagittal plane along the short axis direction Y can be set to no more than 0.5. That is, when the sound-emitting part is divided into four equal parts along the short axis direction Y, the first projection point P is located in the area where Y ≤ 2. More preferably, in order to bring the first sound receiving hole 1191 closer to the user's mouth and improve the sound reception effect of the first microphone, in some embodiments, the ratio of the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the lower side of the sound-emitting part 11 on the sagittal plane in the short axis direction Y to the size of the projection of the sound-emitting part 11 on the sagittal plane along the short axis direction Y can be set to no more than 0.4. Preferably, the ratio of the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the lower side surface of the sound-emitting part 11 on the sagittal plane in the short axis direction Y to the size of the projection of the sound-emitting part 11 on the sagittal plane along the short axis direction Y can be no greater than 0.3. Setting the first sound receiving hole 1191 at a position close to the lower side surface of the sound-emitting part can also provide more options for the position of the second sound receiving hole 1192, ensuring that the second sound receiving hole can maintain a specific distance from the first sound receiving hole and that the line connecting the first sound receiving hole and the second sound receiving hole can be more accurately pointed to the user's mouth. Based on the above considerations, it is more preferred that the ratio of the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and the projection of the lower side surface of the sound-emitting part 11 on the sagittal plane in the short axis direction Y to the size of the projection of the sound-emitting part 11 on the sagittal plane along the short axis direction Y can be less than or equal to 0.1. More preferably, the first sound receiving hole 1911 can be located on the lower side of the sound-emitting part 11. In this case, the first sound receiving hole 1191 is closer to the user's mouth in the vertical direction, and the sound receiving effect of the first microphone is better.

[0147] Similar to the wearing method in which at least a portion of the sound-emitting portion 11 extends into the user's cavum conchae, in some embodiments, when the earphone 10 is worn so that at least a portion of the sound-emitting portion 11 covers the user's antihelix area, the first sound receiving hole 1192 may be located on the lower side or front side of the sound-emitting portion 11. In some embodiments, if the first sound outlet hole 1191 is too close to the inner side of the sound-emitting portion 11 (e.g., less than 2 mm), not only may the first sound receiving hole 1191 be blocked by the user's ear during wearing, but the first microphone may also collect noise generated by the friction between the user's ear and the sound-emitting portion 11. On the other hand, when the first sound receiving hole 1191 is located on the lower side or front side of the sound-emitting portion 11, the farther the first sound receiving hole 1191 is from the inner side of the sound-emitting portion 11, the lower the volume of the sound received by the first sound receiving hole 1191 from the user's mouth. Therefore, in some embodiments, to ensure both the sound reception effect of the first sound receiving hole 1191 and the volume of the sound received from the user's mouth, the ratio of the distance between the first sound receiving hole 1191 and the inner side surface of the sound-emitting portion 11 in the thickness direction Z of the sound-emitting portion to the size of the sound-emitting portion 11 in the thickness direction Z can be set between 0.25 and 0.7. For example, in some embodiments, the ratio of the distance between the first sound receiving hole 1191 and the inner side surface of the sound-emitting portion 11 in the thickness direction Z to the size of the sound-emitting portion 11 in the thickness direction Z can be set between 0.25 and 0.65. Placing the first sound receiving hole 1191 relatively far from the inner side surface of the sound-emitting portion 11 can reduce the impact of noise generated by friction between the sound-emitting portion 11 and the ear. Furthermore, by reducing the distance between the first sound receiving hole 1191 and the outer side surface of the sound-emitting portion 11, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 can be directed toward the user's mouth. Preferably, the ratio of the distance between the first sound hole 1191 and the inner side surface of the sound-emitting part 11 in the thickness direction Z of the sound-emitting part to the size of the sound-emitting part 11 along its thickness direction Z can be 0.3-0.65. Here, by further reducing the distance between the first sound hole 1191 and the outer side surface of the sound-emitting part 11, the connecting line between the first sound hole 1191 and the second sound hole 1192 can be made to point more accurately to the user's mouth.

[0148] Referring to Figure 27, in some embodiments, the projection of the front side of the sound-emitting portion 11 on the user's sagittal plane (or the extension of the projection) and the projection of the lower side of the sound-emitting portion 11 on the user's sagittal plane (or the extension of the projection) can have an intersection G. The greater the distance between the first projection point P of the first sound receiving hole 1191 on the sagittal plane and this intersection G, the farther the first projection point P is from the user's mouth, and the worse the sound reception effect of the first microphone. Based on this, in some embodiments, to ensure the sound reception effect of the first microphone, the distance between the first projection point P and the intersection G can be no greater than 5mm. In some embodiments, the distance between the first projection point and the fourth projection point can be no greater than 3mm. To improve the sound reception effect of the first microphone, the first sound receiving hole 1191 can be positioned closer to the user's mouth on the sound-emitting portion 11. In some embodiments, the distance between the first projection point and the fourth projection point can be no greater than 1mm. In this case, the first sound receiving hole 1191 is closer to the user's mouth, further improving the sound reception effect of the first microphone.

[0149] Similar to the wearing method in which at least a portion of the sound-emitting portion 11 extends into the user's cavum concha, in some embodiments, when the earphone 10 is worn in a manner in which at least a portion of the sound-emitting portion 11 covers the user's anti-helix area, the second sound receiving hole 1192 can be provided on a side of the sound-emitting portion 11 that does not form an auxiliary cavity with the user's anti-helix. For example, the second sound receiving hole 1192 can be provided on the upper side surface US, the lower side surface LS, the outer side surface OS, etc. of the sound-emitting portion 11. In some embodiments, the second sound receiving hole 1192 can be located on the outer side surface OS of the sound-emitting portion 11. In some embodiments, in order to avoid the distance between the second sound receiving hole 1192 and the user's auricle being too small, thereby affecting the sound reception quality of the earphone 10, the distance between the second sound receiving hole 1192 and the upper side surface US of the sound-emitting portion 11 can be 1 mm to 3 mm, and the distance between the second sound receiving hole 1192 and the rear side surface FE (also referred to as the end FE of the sound-emitting portion 11) can be 8 mm to 12 mm. Preferably, in some embodiments, the distance between the second sound receiving hole 1192 and the upper side surface US may be 2mm-2.5mm, and the distance between the second sound receiving hole 1192 and the rear side surface FE may be 9mm-10mm. In some embodiments, the distance between the position of the second sound receiving hole 1192 and the upper side surface US may be 2.47mm, and the distance between the second sound receiving hole 1192 and the rear side surface FE may be 9.96mm. Similarly, in order to avoid the distance between the second sound receiving hole 1192 and the first sound receiving hole 1191 being too small, in some embodiments, the distance between the second sound receiving hole 1192 and the front side surface CE may be 8mm-12mm. Preferably, the distance between the second sound receiving hole 1192 and the front side surface CE may be 8.5mm-12mm. In some embodiments, the distance between the second sound receiving hole 1192 and the lower side surface LS may be 4mm-8mm. Preferably, the distance between the second sound receiving hole 1192 and the lower side surface LS may be 6mm-8mm. It should be noted that, in this specification, the distance from the first sound receiving hole 1192 to the upper side, front side, rear side and lower side of the sound-emitting part 11 may refer to the distance from the center of the opening of the first sound receiving hole 1192 on the outer surface of the shell of the sound-emitting part 11 to the upper side, front side or rear side of the sound-emitting part 11. Specifically, when the side of the sound-emitting part 11 (such as the upper side, front side, rear side and lower side) is a plane, the distance may refer to the distance from the center of the opening of the first sound receiving hole 1192 on the outer surface of the shell of the sound-emitting part 11 to the side. When the side of the sound-emitting part 11 is a curved surface, the distance may refer to the distance from the center of the opening of the first sound receiving hole 1192 on the outer surface of the shell of the sound-emitting part 11 to the tangent plane corresponding to the curved surface.

[0150] Figure 28A is a schematic diagram of an exemplary wearing method of an earphone according to some other embodiments of this specification. Figure 28B is a schematic diagram of the angle between the line connecting the first sound receiving hole and the second sound receiving hole and the outer side surface of the sound-emitting part according to some embodiments of this specification.

[0151] Referring to Figures 28A and 28B, in some embodiments, when the earphone 10 is used in the second wearing position, the angle between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the outer side surface of the sound-emitting portion 11 can be represented as θ9. In some embodiments, the outer side surface of the sound-emitting portion 11 can be a plane. In this case, the angle between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the outer side surface is the angle between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the plane. In some embodiments, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 can be a curved surface. In this case, the angle between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the outer side surface is the angle between the first sound receiving hole 1191 and the second sound receiving hole 1192 and the plane tangent to the curved surface of the outer side surface. For example, when the outer side surface is a plane, in some embodiments, the outer side surface of the sound-emitting portion 11 can be represented by four points M1, M2, M3, and M4 located on the outer side surface. In some embodiments, the first sound receiving hole 1191 and the second sound receiving hole 1192 can be located on the same side surface of the sound-emitting portion 11 or on different sides. For example, the first sound receiving hole 1191 and the second sound receiving hole 1192 may both be located on the outer side of the sound-emitting portion 11. For another example, the first sound receiving hole 1191 may be located on the front side of the sound-emitting portion 11, and the second sound receiving hole 1192 may be located on the outer side of the sound-emitting portion 11. For another example, in some embodiments, the first sound receiving hole 1191 may be located on the lower side of the sound-emitting portion 11, and the second sound receiving hole 1192 may be located on the outer side of the sound-emitting portion 11.

[0152] As shown in FIG28B , in some embodiments, the first sound receiving hole 1191 has a projection point M7 on the outer surface M1M2M3M4, and the second sound receiving hole 1192 can be located on the outer surface of the sound-emitting portion 11 (i.e., within the plane M1M2M3M4). The angle θ9 formed by the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the outer surface of the sound-emitting portion 11 can refer to the angle formed by the line connecting the projection point M7 and the second sound receiving hole 1192 and the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192. In some embodiments, when the second sound hole 1192 is not located on the outer surface of the sound-emitting part 11, the second sound hole 1192 may have a projection point M8 (not shown in the figure) on the outer surface M1M2M3M4, and the angle θ9 between the line connecting the first sound hole 1191 and the second sound hole 1192 and the outer surface of the sound-emitting part 11 may refer to the angle formed by the line connecting the projection point M7 and the projection point M8 and the line connecting the first sound hole 1191 and the second sound hole 1192.

[0153] It can be understood that the angle θ9 can reflect the relative positional relationship between the first sound receiving hole 1191 and the second sound receiving hole 1192 in the thickness direction of the sound-emitting portion 11, and can also reflect, to a certain extent, the directionality of the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 relative to the user's mouth. Based on this, in some embodiments, in order to ensure that the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 has better directionality and thus ensures that the first sound receiving hole 1191 and the second sound receiving hole 1192 have better sound receiving effect, the angle θ9 between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the outer surface of the sound-emitting portion 11 can be controlled to be between 0° and 60°. In this case, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 can be roughly directed toward the front area of ​​the user's face, thereby ensuring that the first microphone and the second microphone can have better sound receiving effect. For example, in some embodiments, the angle θ9 formed between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the outer side surface of the sound-emitting portion 11 can be 10°-40°. In this case, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 can be roughly directed toward the area around the user's mouth, thereby improving the sound reception effect of the first microphone and the second microphone. Preferably, the angle θ9 formed between the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 and the outer side surface of the sound-emitting portion 11 can be 25°-38°. In this case, the line connecting the first sound receiving hole 1191 and the second sound receiving hole 1192 can be directed toward the user's mouth, thereby further improving the sound reception effect of the first microphone and the second microphone.

[0154] For more details about the second wearing method, you can refer to the content described elsewhere in this manual (such as the relevant content about the wearing method in which at least part of the sound-emitting part extends into the user's concha cavity) without conflict, and will not be repeated in this manual.

[0155] The basic concepts have been described above. It will be apparent to those skilled in the art that the detailed disclosure above is merely illustrative and does not limit the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and amendments to the present application. Such modifications, improvements, and amendments are suggested in the present application and remain within the spirit and scope of the exemplary embodiments of the present application.

[0156] At the same time, this application uses specific terms to describe the embodiments of this application. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that "one embodiment," "an embodiment," or "an alternative embodiment" mentioned twice or multiple times in different locations in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application may be appropriately combined.

[0157] Similarly, it should be noted that, in order to simplify the presentation of this application and thus facilitate understanding of one or more embodiments of the invention, the foregoing descriptions of the embodiments of this application sometimes combine multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not mean that the subject matter of this application requires more features than those recited in the claims. In fact, an embodiment may have fewer features than all of the features of a single embodiment disclosed above.

[0158] Finally, it should be understood that the embodiments described in this application are only intended to illustrate the principles of the embodiments of this application. Other variations may also fall within the scope of this application. Therefore, as examples and not limitations, the alternative configurations of the embodiments of this application may be considered consistent with the teachings of this application. Accordingly, the embodiments of this application are not limited to the embodiments explicitly introduced and described in this application. The specific implementation methods recorded in this application are merely exemplary, and one or more technical features in the specific implementation methods are optional or additional, and do not constitute necessary technical features of the inventive concept of this application. In other words, the scope of protection of this application covers and is far greater than the specific implementation methods.

Claims

1. A headset, comprising: Vocal part; an ear hook configured to place the sound-emitting portion near the ear canal without blocking the ear canal opening, with at least a portion of the sound-emitting portion extending into the cavum conchae; as well as A microphone assembly including at least a first microphone and a second microphone, wherein the first microphone or the second microphone is disposed in the sound-emitting portion or the ear hook, and the sound-emitting portion or the ear hook is provided with a first sound receiving hole and a second sound receiving hole corresponding to the first microphone and the second microphone, respectively; Among them, the extension line of the line connecting the projection of the first sound receiving hole on the user's sagittal plane and the projection of the second sound receiving hole on the sagittal plane has an intersection with the projection of the antihelix on the sagittal plane, the distance between the projection of the first sound receiving hole on the sagittal plane and the projection of the second sound receiving hole on the sagittal plane is a first distance, the distance between the projection of the second sound receiving hole on the sagittal plane and the intersection is a second distance, and the ratio of the first distance to the second distance is 1.8-4.

4.

2. The headset according to claim 1, wherein The ratio of the first distance to the second distance is 2.5-3.

8.

3. The earphone according to claim 1 or 2, wherein: The second distance is 2 mm-10 mm.

4. The earphone according to claim 3, wherein The second distance is 6 mm to 10 mm.

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

6. The earphone according to claim 5, wherein The first distance is 25mm-30mm.

7. The earphone according to any one of claims 1 to 6, wherein: The ear hook is hung between the user's auricle and head, the part of the ear hook close to the sound-emitting part extends toward the front and outer side of the auricle and is connected to the sound-emitting part, the first sound receiving hole is located at the part of the ear hook close to the sound-emitting part, and the minimum distance between the projection of the first sound receiving hole in the sagittal plane and the projection of the connection between the sound-emitting part and the part of the ear hook close to the sound-emitting part in the sagittal plane is not greater than 4 mm.

8. The earphone according to any one of claims 1 to 6, wherein the projection shape of the sound-emitting part on the sagittal plane includes a long axis direction and a short axis direction, wherein: The ratio of the distance between the projection of the first sound receiving hole on the sagittal plane and the projection of the front side of the sound emitting part on the sagittal plane in the long axis direction to the size of the projection of the sound emitting part on the sagittal plane along the long axis direction is not greater than 0.

75.

9. The earphone according to claim 8, wherein the ratio of the distance between the projection of the first sound receiving hole on the sagittal plane and the projection of the lower side surface of the sound-emitting part on the sagittal plane in the short axis direction to the size of the projection of the sound-emitting part on the sagittal plane along the short axis direction is not greater than 0.

5.

10. The earphone according to any one of claims 1 to 6, wherein: The distance between the intersection of the projection of the front side of the sound-emitting part on the sagittal plane and the projection of the lower side of the sound-emitting part on the sagittal plane and the projection of the first sound receiving hole on the sagittal plane is less than 3 mm.

11. The earphone according to any one of claims 1 to 6, wherein: The first sound receiving hole is located on the lower side or front side of the sound-emitting part, and the ratio of the distance between the first sound receiving hole and the inner side of the sound-emitting part in the thickness direction of the sound-emitting part to the size of the sound-emitting part along its thickness direction is 0.25-0.

4.

12. The earphone according to any one of claims 1 to 11, wherein: The second sound receiving hole is located on at least one side surface of the upper side surface, the lower side surface, and the outer side surface of the sound-emitting part.

13. The earphone according to any one of claims 1 to 11, wherein: The second sound receiving hole is located on the outer side of the sound emitting part, and the distance between the second sound receiving hole and the upper side of the sound emitting part is 1 mm-3 mm.

14. The headset according to claim 13, wherein The distance between the second sound receiving hole and the front side surface of the sound-emitting part is 8mm-12mm.

15. The earphone according to any one of claims 1 to 14, wherein: The angle between the line connecting the projection of the first sound receiving hole on the sagittal plane and the projection of the second sound receiving hole on the sagittal plane and the line connecting the projection of the user's mandibular bottom end point on the sagittal plane and the centroid of the projection of the ear canal opening on the sagittal plane is not greater than 45°.

16. The earphone according to any one of claims 1 to 15, wherein: An angle between a line connecting the projection of the first sound receiving hole on the sagittal plane and the projection of the second sound receiving hole on the sagittal plane and a vertical axis of the user is in the range of 40°-70°.

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

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

19. The earphone according to any one of claims 1 to 18, wherein: An angle between a line connecting the projection of the first sound receiving hole on the sagittal plane and the projection of the second sound receiving hole on the sagittal plane and a long axis direction of the projection shape of the sound emitting part on the sagittal plane is 20°-135°.

20. The earphone according to any one of claims 1 to 19, wherein: The aperture of the first sound receiving hole or the second sound receiving hole is greater than 0.8 mm, and / or the depth of the first sound receiving hole or the second sound receiving hole is less than 4 mm.

21. The earphone according to any one of claims 1 to 20, wherein: An acoustic resistance net is provided at the first sound receiving hole and the second sound receiving hole, and the acoustic resistance of the acoustic resistance net is 45 Mrayls-320 Mrayls.

22. The headset according to claims 1-21, wherein An acoustic resistance net is provided at the first sound receiving hole and the second sound receiving hole, the acoustic resistance net includes a plurality of holes, and the acoustic resistance net satisfies at least one of the following conditions; The pores have a pore diameter in the range of 15 μm to 51 μm; The opening rate of the acoustic resistance mesh is in the range of 11%-18%; The thickness of the acoustic resistance mesh is in the range of 55 μm to 108 μm.

23. The headset according to claims 1-21, wherein It also includes a sound outlet hole and a pressure relief hole, and the difference between the distance from the first sound receiving hole to the sound outlet hole and the distance from the first sound receiving hole to the pressure relief hole is less than 10 mm.

24. A headset comprising: Vocal part; as well as an ear hook configured to fix the sound-emitting portion in a position near the ear canal but not blocking the ear canal opening, wherein at least a portion of the sound-emitting portion covers the antihelix area; A microphone assembly including at least a first microphone and a second microphone, wherein the first microphone or the second microphone is disposed in the sound-emitting portion or the ear hook, and the sound-emitting portion or the ear hook is provided with a first sound receiving hole and a second sound receiving hole corresponding to the first microphone and the second microphone, respectively; Among them, the extension line of the line connecting the projection of the first sound receiving hole on the user's sagittal plane and the projection of the second sound receiving hole on the sagittal plane has an intersection with the projection of the inner contour of the auricle on the sagittal plane, the distance between the projection of the first sound receiving hole on the sagittal plane and the projection of the second sound receiving hole on the sagittal plane is a first distance, the distance between the projection of the second sound receiving hole on the sagittal plane and the intersection is a second distance, and the ratio of the first distance to the second distance is 1.8-4.

4.

25. The headset according to claim 24, wherein The ratio of the first distance to the second distance is 2.5-3.

8.

26. The headset according to claim 24 or 25, wherein The second distance is 2 mm-10 mm.

27. The headset according to claim 26, wherein The second distance is 6 mm-10 mm.

28. The headset according to claim 24 or 25, wherein The first distance is 10 mm to 50 mm.

29. The headset according to claim 28, wherein The first distance is 25mm-30mm.

30. The headset according to any one of claims 24-29, wherein: The ear hook is hung between the user's auricle and head, the part of the ear hook close to the sound-emitting part extends toward the front and outer side of the auricle and is connected to the sound-emitting part, the first sound receiving hole is located at the part of the ear hook close to the sound-emitting part, and the minimum distance between the projection of the first sound receiving hole in the sagittal plane and the projection of the connection between the sound-emitting part and the part of the ear hook close to the sound-emitting part in the sagittal plane is not greater than 4 mm.

31. The earphone according to any one of claims 24 to 29, wherein the projection shape of the sound-emitting portion on the sagittal plane includes a long axis direction and a short axis direction, wherein: The ratio of the distance between the projection of the first sound receiving hole on the sagittal plane and the projection of the front side of the sound emitting part on the sagittal plane in the long axis direction to the size of the projection of the sound emitting part on the sagittal plane along the long axis direction is not greater than 0.

75.

32. The earphone according to claim 31, wherein the ratio of the distance between the projection of the first sound receiving hole on the sagittal plane and the projection of the lower side surface of the sound-emitting part on the sagittal plane in the short axis direction to the size of the projection of the sound-emitting part on the sagittal plane along the short axis direction is not greater than 0.

5.

33. The headset according to any one of claims 24-29, wherein: The distance between the intersection of the projection of the front side of the sound-emitting part on the sagittal plane and the projection of the lower side of the sound-emitting part on the sagittal plane and the projection of the first sound receiving hole on the sagittal plane is less than 3 mm.

34. The headset according to any one of claims 24-29, wherein: The first sound receiving hole is located on the lower side or front side of the sound-emitting part, and the ratio of the distance between the first sound receiving hole and the inner side of the sound-emitting part in the thickness direction of the sound-emitting part to the size of the sound-emitting part along its thickness direction is 0.25-0.

4.

35. The headset according to any one of claims 24 to 34, wherein: The second sound receiving hole is located on at least one side surface of the upper side surface, the lower side surface, and the outer side surface of the sound-emitting part.

36. The headset according to any one of claims 24 to 34, wherein: The second sound receiving hole is located on the outer side of the sound emitting part, and the distance between the second sound receiving hole and the upper side of the sound emitting part is 1 mm-3 mm.

37. The headset according to claim 36, wherein The distance between the second sound receiving hole and the front side surface of the sound-emitting part is 8mm-12mm.

38. The headset according to any one of claims 24 to 37, wherein: The angle between the line connecting the projection of the first sound receiving hole on the sagittal plane and the projection of the second sound receiving hole on the sagittal plane and the line connecting the projection of the user's mandibular bottom end point on the sagittal plane and the centroid of the projection of the ear canal opening on the sagittal plane is not greater than 45°.

39. The headset according to any one of claims 24-38, wherein An angle between a line connecting the projection of the first sound receiving hole on the sagittal plane and the projection of the second sound receiving hole on the sagittal plane and a vertical axis of the user is in the range of 40°-70°.

40. The headset according to any one of claims 24-39, wherein The angle between the line connecting the first sound receiving hole and the second sound receiving hole and the user's coronal axis is -30° to 135°.

41. The headset according to any one of claims 24-40, wherein: An included angle between a line connecting the first sound receiving hole and the second sound receiving hole and the outer side surface is 10°-60°.

42. The headset according to any one of claims 24 to 41, wherein: An angle between a line connecting the projection of the first sound receiving hole on the sagittal plane and the projection of the second sound receiving hole on the sagittal plane and a long axis direction of the projection shape of the sound emitting part on the sagittal plane is 0°-90°.

Images