A headset

Abstract

The present specification relates to the field of acoustic technology, and in particular to an earphone, comprising: a sound-emitting portion, the sound-emitting portion being at least partially inserted into the concha cavity; an earhook, the earhook being arranged between the auricle and the head of the user, and extending toward the side of the auricle away from the head and connected to the sound-emitting portion, so that the sound-emitting portion is worn near the ear canal but does not block the ear canal opening; wherein, in a non-worn state, the earhook and the sound-emitting portion form a first projection on a first plane, the first projection comprising an outer contour, a first end contour, an inner contour, and a second end contour, and the outer contour, the first end contour, the second end contour, and a tangent segment connecting the first end contour and the second end contour of the first projection jointly define a first closed curve, and the ratio of the projected area of ​​the sound-emitting portion on the first plane to the first area of ​​the first closed curve is between 0.25 and 0.4.

Description

[0001] Cross-references

[0002] This specification claims priority to Chinese application No. 202211336918.4 filed on October 28, 2022, application No. 202223239628.6 filed on December 1, 2022, priority to PCT application No. PCT / CN2022 / 144339 filed on December 30, 2022, priority to PCT application No. PCT / CN2023 / 079401 filed on March 2, 2023, and priority to PCT application No. PCT / CN2023 / 079412 filed on March 2, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This specification relates to the field of acoustic technology, and in particular to a headset. Background Art

[0004] With the development of acoustic output technology, acoustic output devices (such as headphones) have become widely used in people's daily lives. They can be used with electronic devices such as mobile phones and computers to provide users with an auditory feast. Based on the user's wearing method, acoustic devices can generally be divided into head-mounted, ear-hook, and in-ear types. The output performance and wearing experience of acoustic devices have a significant impact on user comfort.

[0005] Therefore, it is necessary to provide a headset to improve the output performance and wearing experience of the acoustic output device. Summary of the Invention

[0006] One of the embodiments of the present specification provides an earphone, comprising: a sound-emitting part, which is at least partially inserted into the concha cavity; an earhook, which is arranged between the auricle and the head of the user, and extends to the side of the auricle away from the head and is connected to the sound-emitting part, so that the sound-emitting part is worn near the ear canal but does not block the ear canal opening; wherein, in a non-worn state, the earhook and the sound-emitting part form a first projection on a first plane, the first projection includes an outer contour, a first end contour, an inner contour, and a second end contour, and the outer contour, the first end contour, the second end contour of the first projection, and a tangent segment connecting the first end contour and the second end contour jointly define a first closed curve, and the ratio of the projected area of ​​the sound-emitting part on the first plane to the first area of ​​the first closed curve is between 0.25 and 0.4.

[0007] One of the embodiments of the present specification also provides an earphone, which includes: a sound-emitting part, which at least partially covers the antihelix area; an ear hook, which is hung between the user's auricle and the head, and extends to the side of the auricle away from the head and connects to the sound-emitting part, so that the sound-emitting part is worn near the ear canal but does not block the ear canal opening; wherein, in a non-worn state, the ear hook and the sound-emitting part form a fifth projection on the first plane, and the fifth projection includes an outer contour, a first end contour, an inner contour, and a second end contour, and the outer contour, the first end contour, the second end contour of the fifth projection, and the tangent segment connecting the first end contour and the second end contour jointly define a fifth closed curve; the ratio of the projected area of ​​the sound-emitting part on the first plane to the fifth area of ​​the fifth closed curve is between 0.4 and 0.75. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] This specification 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:

[0009] Figure 1 is an exemplary ear schematic diagram shown in some embodiments of this specification;

[0010] Figure 2 is an exemplary wearing diagram of headphones according to some embodiments of this specification;

[0011] Figure 3 is an exemplary wearing diagram of headphones according to some other embodiments of this specification;

[0012] Figure 4 is a schematic diagram of an acoustic model formed by headphones according to some embodiments of this specification;

[0013] Figure 5 is a schematic diagram of the structure of the earphone in a non-wearing state according to some embodiments of this specification;

[0014] Figure 6 A first projection formed by projecting the earphone in a non-worn state onto the first plane according to some embodiments of this specification;

[0015] Figure 7 is an exemplary wearing diagram of headphones according to some other embodiments of this specification;

[0016] Figure 8 is a schematic diagram showing the difference in appearance of headphones in a worn state and a non-worn state according to some embodiments of this specification;

[0017] Figure 9is a listening index curve diagram of a cavity-like structure having leakage structures of different sizes according to some embodiments of this specification;

[0018] Figure 10 is a schematic diagram of exemplary frequency response curves corresponding to different overlapping ratios of the projection area of ​​the first projection and the projection area of ​​the user's cavum conchae on the human body sagittal plane according to some embodiments of this specification;

[0019] Figure 11 Schematic diagram of exemplary frequency response curves corresponding to different overlapping ratios between the projected area of ​​the sound-producing part and the projected area of ​​the user's cavum conchae on the sagittal plane of the human body according to some embodiments of this specification;

[0020] Figure 12A is a schematic diagram of different exemplary mating positions of an earphone and a user's ear canal according to this specification;

[0021] Figure 12B is a schematic diagram of different exemplary mating positions of another earphone and a user's ear canal according to this specification;

[0022] Figure 12C is a schematic diagram of different exemplary mating positions of another earphone and a user's ear canal according to this specification;

[0023] Figure 13 Schematic diagram of exemplary frequency response curves corresponding to different distances between the projection of the end of the vocal part on the sagittal plane of the human body and the projection of the edge of the cavum concha on the sagittal plane of the human body according to some embodiments of this specification;

[0024] Figure 14A is a schematic diagram of exemplary frequency response curves corresponding to different overlapping ratios between the area of ​​the first projection and the area of ​​the projection of the cavum concha on the sagittal plane of the human body according to some embodiments of this specification;

[0025] Figure 14B is a schematic diagram of exemplary frequency response curves corresponding to different distances between the centroid of the first projection and the centroid of the projection of the ear canal opening on the sagittal plane of the human body according to some embodiments of this specification;

[0026] Figure 15 is an exemplary wearing diagram of headphones according to some other embodiments of this specification;

[0027] Figure 16 is a schematic diagram of an acoustic model formed by headphones according to some embodiments of this specification;

[0028] Figure 17 is a schematic diagram showing the difference in appearance between headphones in a worn state and a non-worn state according to some embodiments of this specification;

[0029] Figure 18 Schematic diagram of exemplary frequency response curves corresponding to different overlapping ratios of the projection of the vocal part on the sagittal plane of the human body and the projection of the cavum concha on the sagittal plane of the human body according to some embodiments of this specification;

[0030] Figure 19A is an exemplary wearing diagram of an earphone according to other embodiments of this specification;

[0031] Figure 19B is an exemplary wearing diagram of another type of earphone according to other embodiments of this specification;

[0032] Figure 19C is an exemplary wearing diagram of another headset according to other embodiments of this specification;

[0033] Figure 19D is an exemplary wearing diagram of another earphone according to other embodiments of this specification;

[0034] Figure 19E is an exemplary wearing diagram of another earphone according to other embodiments of this specification;

[0035] Figure 20 Shown Figure 19E Schematic diagram of exemplary frequency response curves corresponding to different distances between the projection of the end of the middle vocal part on the human sagittal plane and the projection of the edge of the concha cavity on the human sagittal plane;

[0036] Figure 21A Schematic diagrams of exemplary frequency response curves corresponding to different overlapping ratios between the area of ​​the first projection of the sound-emitting part on the human sagittal plane and the area of ​​the projection of the cavum concha on the human sagittal plane, according to other embodiments of this specification, when the sound-emitting part does not extend into the cavum concha;

[0037] Figure 21B This is a schematic diagram of exemplary frequency response curves corresponding to different distances between the centroid of the first projection of the sound-emitting part on the sagittal plane of the human body and the centroid of the projection of the ear canal opening on the sagittal plane of the human body in a wearing scenario when the sound-emitting part does not extend into the concha cavity as shown in other embodiments of this specification. DETAILED DESCRIPTION

[0038] To more clearly illustrate the technical solutions of the embodiments of this specification, the following briefly describes the drawings required for describing the embodiments. Obviously, the drawings described below are merely examples or embodiments of this specification. Those skilled in the art can apply this specification 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.

[0039] Figure 1 is an exemplary ear diagram according to some embodiments of this specification. Figure 1The 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 the 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 locations on the ear 100 besides the external auditory canal 101. For example, the acoustic device can be worn by utilizing the bacula concha 103, the triangular fossa 104, the antihelix 105, the scaphoid 106, the helix 107, or a combination thereof. In some embodiments, to improve the comfort and reliability of the acoustic device, the device can further utilize locations such as the user's earlobe 108. By utilizing locations on the ear 100 besides the external auditory canal 101 to facilitate wearing the acoustic device and sound transmission, the user's external auditory canal 101 can be "liberated." When a user wears an acoustic device (such as headphones), the acoustic device does not block the user's external auditory canal 101. The user can receive both sound from the acoustic device and ambient sounds (e.g., horns, car bells, surrounding voices, traffic signals, etc.), thereby reducing the likelihood 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, so that the entire or partial structure of the ear sound-producing part is placed in front of the helix crus 109 (e.g., Figure 1 For another example, when a user wears an earphone, the entire or partial structure of the sound-producing part may be in contact with the upper portion of the external auditory canal 101 (for example, 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 an earphone, 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 cymba concha 103, the triangular fossa 104, etc.) (for example, Figure 1The middle dotted line encloses an area M1 that includes at least the bacula concha 103 and the triangular fossa 104 and an area M2 that includes at least the cavum concha 102).

[0040] Different users may have individual differences, resulting in different shapes, sizes and other dimensional differences in the 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, such as GRAS 45BC KEMAR, made based on ANSI: S3.36, S3.25 and IEC: 60318-7 standards, can be used as a reference for wearing the acoustic device, thereby presenting the scenario in which most users normally wear the acoustic device. Just as an example, the ear used as a reference may have the following relevant characteristics: the projection area of ​​the auricle on the sagittal plane of the human body is 1300mm 2 ~1700mm 2 Therefore, in this specification, descriptions such as "user wears", "in a wearing state" and "in a wearing state" may refer to the acoustic device described in this specification being worn on the ear of the aforementioned simulator. Of course, taking into account the individual differences between different users, the structure, shape, size, thickness, etc. of one or more parts of the ear 100 may be differentiated 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. mentioned below) may have different ranges of values ​​to adapt to different ears.

[0041] It should be noted that in fields such as medicine and anatomy, the human body is defined as three fundamental planes: the sagittal plane, the coronal plane, and the horizontal plane, as well as three fundamental axes: the sagittal axis, the coronal axis, and the vertical axis. The sagittal plane is a plane perpendicular to the ground, drawn along the anterior-posterior direction of the body, dividing the body into left and right halves. The coronal plane is a plane perpendicular to the ground, drawn along the lateral-lateral direction of the body, dividing the body into anterior-posterior halves. The horizontal plane is a plane perpendicular to the ground, drawn along the lateral-lateral direction of the body, dividing the body into upper and lower halves. Accordingly, the sagittal axis is the axis along the lateral-lateral direction of the body and perpendicular to the coronal plane; the coronal axis is the axis along the lateral-lateral direction of the body and perpendicular to the sagittal plane; and the vertical axis is the axis along the lateral-lateral direction of the body and perpendicular to the horizontal plane. Furthermore, the "front side of the ear" mentioned in this specification is a concept relative to the "back side of the ear". The front side of the ear refers to the side of the ear that is located along the sagittal axis and faces the human face, and the back side of the ear refers to the side of the ear that is located along the sagittal axis and faces away from the human face. Figure 1 Schematic diagram of the front profile of the ear shown.

[0042] The description of the ear portion 100 is for illustrative purposes only and is not intended to limit the scope of this specification. A person skilled in the art can make various changes and modifications based on the description of this specification. For example, a portion of the structure of the acoustic device may shield part or all of the external auditory canal 101. Such changes and modifications remain within the scope of this specification.

[0043] Figure 2 : is an exemplary wearing diagram of the earphones according to some embodiments of this specification. Figure 2 As shown, 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 may be an ear hook, and the sound-emitting portion 11 is connected to one end of the ear hook, and the ear hook may be configured to be adapted to the user's ear. For example, the ear hook may be an arc-shaped structure. In some embodiments, the suspension structure 12 may also be a clamping structure adapted to 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 may include but is not limited to an ear hook, an elastic band, etc., so that the earphone 10 can be better fixed to the user to prevent the user from falling during use.

[0044] In some embodiments, the sound-emitting portion 11 can be worn on the user's body and can be equipped with a speaker 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 fixed 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.

[0045] Combine Figure 1 and Figure 2 In some embodiments, when a user wears the earphone 10, at least a portion of the sound-emitting portion 11 may be located above, below, or in front of the user's ear 100 (e.g., Figure 1 The area in front of the tragus is shown in J) or inside the auricle (e.g. Figure 1 The following will provide an exemplary description of the different wearing positions (11A, 11B, and 11C) of the sound-emitting portion 11.

[0046] In some embodiments, the wearing position 11A is located on the side of the user's ear 100 facing the human face area along the sagittal axis, that is, the sound-emitting portion 11 is located on the side of the ear 100 facing the human face area (for example, Figure 1 Furthermore, a speaker is provided inside the housing of the sound-emitting portion 11, and at least one sound-emitting hole ( Figure 2(not shown in the figure), the sound outlet can be located on the side wall of the shell facing or close to the external auditory canal of the user, and the speaker can output sound to the ear canal of the user through the sound outlet. In some embodiments, the speaker may include a diaphragm, and the chamber inside the shell is divided into at least a front cavity and a rear cavity by the diaphragm. The sound outlet 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. In some embodiments, the shell 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 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 can be transmitted to the outside through the pressure relief holes. For example, in some embodiments, the speaker in the sound-emitting portion 11 can output sounds with a phase difference (e.g., opposite phases) through the sound outlet and the pressure relief holes. The sound outlet can be located on the side wall of the sound-emitting portion 11 housing facing the user's external auditory canal 101, and the pressure relief hole can be located on the side of the sound-emitting portion 11 housing facing away from the user's external auditory canal 101. In this case, the housing can act as a baffle, increasing the acoustic path difference between the sound outlet and the pressure relief holes 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 major axis direction Y and a minor axis direction Z that are perpendicular to the thickness direction X and orthogonal to each other. The long axis direction Y 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 of the human body) (for example, when the projection shape is a rectangle or an approximate rectangle, the long axis direction is the length direction of the rectangle or the approximate rectangle), and the short axis direction Z can be defined as the direction perpendicular to the long axis direction Y in the shape of the projection shape of the sound-emitting part 11 on the sagittal plane of the human body (for example, when the projection shape is a rectangle or an approximate rectangle, the short axis direction is the width direction of the rectangle or the approximate rectangle). The thickness direction X can be defined as the direction perpendicular to the two-dimensional projection surface, for example, consistent with the direction of the coronal axis, both pointing in the left and right directions of the body.

[0047] In some embodiments, when the sound-emitting portion 11 is in a tilted state when worn, the long axis direction Y and the short axis direction Z are still parallel or approximately parallel to the sagittal plane of the human body, and the long axis direction Y can have a certain angle with the direction of the sagittal axis, that is, the long axis direction Y is also tilted accordingly, and the short axis direction Z can have a certain angle with the direction of the vertical axis, that is, the short axis direction Z is also tilted, such as Figure 2In some embodiments, the entire or partial structure of the shell of the sound-emitting portion 11 can extend into the concha cavity, that is, the projection of the shell of the sound-emitting portion 11 on the sagittal plane of the human body overlaps with the projection of the concha cavity on the sagittal plane of the human body. For details about the wearing position 11B, please refer to other contents in this manual, for example, Figure 3 and the corresponding instruction manual.

[0048] In some embodiments, the sound-emitting portion can also be in a horizontal state or a nearly horizontal state when worn, such as Figure 2 As shown in the wearing position 11C, the long axis direction Y can be consistent or approximately consistent with the direction of the sagittal axis, both pointing to the front and back direction of the body, and the short axis direction Z can be consistent or approximately consistent with the direction of the vertical axis, both pointing to the up and down direction of the body. It should be noted that in the wearing state, the sound-emitting part 11 is in an approximately horizontal state, which can refer to Figure 2 The angle between the long axis direction of the wearing position 11C shown and the sagittal axis is within a specific range (for example, not greater than 20°).

[0049] In addition, the wearing position of the sound-emitting part 11 is not limited to Figure 2 The wearing positions 11A, 11B and 11C shown in FIG. satisfy Figure 1 For example, the entire or partial structure of the sound-producing portion 11 may be located in front of the helix crus 109 (e.g., Figure 1 For another example, the entire or partial structure of the sound-producing portion may be in contact with the upper portion of the external auditory canal 101 (for example, the location of one or more portions such as the crus helix 109, cymba concha 103, triangular fossa 104, antihelix 105, scaphoid 106, and helix 107). For another example, the entire or partial structure of the sound-producing portion of the acoustic device may be located within a cavity formed by one or more portions of the ear (for example, the cavum concha 102, cymba concha 103, and triangular fossa 104). Figure 1 The middle dotted line encloses an area M1 that includes at least the bacula concha 103 and the triangular fossa 104 and an area M2 that includes at least the cavum concha 102).

[0050] To improve the stability of the earphone 10 when worn, the earphone 10 may employ any one or a combination of the following methods. 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 back of the ear 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 rest 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 side of the ear away from the head along the coronal axis, 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 cavum concha areas from the front and back sides of the ear 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.

[0051] For example, combined Figure 3 When worn, the end FE of the sound-emitting portion 11 (also referred to as the free end) can extend into the cavum concha. Optionally, the sound-emitting portion 11 and the suspension structure 12 can be configured to 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 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 X. For another example, the end FE abuts the cavum concha in the major axis direction Y and / or the minor axis direction Z (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 of the sound-emitting portion 11 opposite the fixed end connected to the suspension structure 12, also referred to as the free end. The sound-emitting portion 11 can have a regular or irregular shape. To further illustrate the end FE of the sound-emitting portion 11, an exemplary illustration is provided here. For example, when the sound-emitting portion 11 is a rectangular parallelepiped structure, the end wall 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, ellipsoid, or 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 Z and the thickness direction X). The ratio of the dimension of this specific region along the major axis direction Y to the dimension of the sound-emitting portion along the major axis direction Y may be in the range of 0.05 to 0.2.

[0052] By extending at least partially the sound-emitting portion 11 into the cavum concha, the listening volume at the listening position (e.g., at the ear canal opening) can be increased, particularly for mid- and low-frequency sounds, while still maintaining a good far-field sound leakage cancellation effect. For illustrative purposes only, when all or part of the sound-emitting portion 11 extends into the cavum concha 102, the sound-emitting portion 11 and the cavum concha 102 form a structure similar to a cavity (hereinafter referred to as a quasi-cavity). In the embodiments of this specification, a quasi-cavity can be understood as a semi-enclosed structure enclosed by the sidewalls of the sound-emitting portion 11 and the cavum concha 102 structure. This semi-enclosed structure is not completely sealed from the external environment, but rather has leakage structures (e.g., openings, gaps, ducts, etc.) that acoustically connect 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 part 11 close to or facing the user's ear canal, and one or more pressure relief holes may be provided on the other side walls of the shell of the sound-emitting part 11 (for example, the side walls away from or facing away from the user's ear canal). The sound outlet holes are acoustically coupled with the front cavity of the earphone 10, and the pressure relief holes are acoustically coupled with the back cavity of the earphone 10. Taking the sound-emitting part 11 including a sound outlet hole and a pressure relief hole as an example, 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, and the sound of the two sound sources are equal in magnitude and opposite in phase. The inner walls corresponding to the sound-emitting part 11 and the cavum concha 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 a cavity-like structure. Figure 4 The acoustic model shown in Figure 4As shown, the cavity-like structure 402 may include a listening position and at least one sound source 401A. The "include" here may mean that at least one of the listening position and the sound source 401A is inside the cavity-like structure 402, or it may 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 may be equivalent to the entrance of the ear canal, or it may be an acoustic reference point of the ear, such as the ear reference point (ERP), the ear-drum reference point (DRP), etc., or it may be an entrance structure leading to the listener. The sound source 401B is located outside the cavity-like structure 402. The sound sources 401A and 401B with opposite phases radiate sound into the surrounding space respectively and cause interference and destructive sound waves to achieve a sound leakage cancellation effect. 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, in the absence of 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 structure 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 the anti-phase sound source 401B outside the cavity-like structure 402 will enter the cavity-like structure 402 through the leakage structure 403 of the cavity-like structure 402. This is equivalent to generating a secondary sound source 401B' at the leakage structure 403, whose intensity is significantly smaller than that of the sound source 401B and also significantly smaller than that of the sound source 401A. The sound generated by the secondary sound source 401B' has a weak anti-phase cancellation effect on the sound source 401A in the cavity, which significantly increases the listening volume at the listening position. As for sound leakage, the sound source 401A radiating sound to the outside through the leakage structure 402 of the cavity is equivalent to generating a secondary sound source 401A' at the leakage structure 402. Since almost all the sound radiated by the sound source 401A is output from the leakage structure 403, and the scale of the cavity-like structure 402 is much smaller than the spatial scale of the evaluated sound leakage (the difference is at least one order of magnitude), it can be considered that the intensity of the secondary sound source 401A' is equivalent to that of the sound source 401A, and still maintains a considerable leakage reduction effect.

[0053] 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, and the contour of the user's concha cavity is an uneven structure. By extending part or all of the sound-emitting part 11 into the concha cavity, a cavity-like structure communicating with the outside world is formed between the sound-emitting part 11 and the contour of the concha cavity. 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 cavity, and the pressure relief hole is set at a position where the sound-emitting part 11 faces away from or away from the ear canal opening. Figure 4The acoustic model shown enables the user to improve the listening position at the ear when wearing headphones and reduce the sound leakage effect in the far field.

[0054] In some embodiments, the sound-producing portion of the earphone may include a transducer and a housing that houses the transducer. A transducer is a component that receives electrical signals and converts them into sound signals for output. In some embodiments, the transducer types can be categorized by frequency, including low-frequency (e.g., 30Hz-150Hz), mid-low-frequency (e.g., 150Hz-500Hz), mid-high-frequency (e.g., 500Hz-5kHz), high-frequency (e.g., 5kHz-16kHz), or full-frequency (e.g., 30Hz-16kHz), or any combination thereof. The terms "low-frequency" and "high-frequency" here only represent approximate frequency ranges; different classification methods may be used in different application scenarios. For example, a crossover point can be determined, with low frequency representing the frequency range below the crossover point and high frequency representing the frequency range above the crossover point. This crossover point can be any value within the human audible range, for example, 500Hz, 600Hz, 700Hz, 800Hz, 1000Hz, etc.

[0055] 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) is provided in the housing at the front side of the diaphragm for transmitting sound. The front cavity is acoustically coupled to the sound outlet, and sound from the front side of the diaphragm can be emitted from the sound outlet through the front cavity. A rear cavity (not shown) is provided in the housing at the rear side of the diaphragm for transmitting sound. The rear cavity is acoustically coupled to the pressure relief hole, and sound from the rear side of the diaphragm can be emitted from the pressure relief hole through the rear cavity.

[0056] Reference Figure 3 Here, an earhook is used as an example of the suspension structure 12. In some embodiments, the earhook can include a first portion 121 and a second portion 122 connected in sequence. The first portion 121 can be positioned between the user's auricle and head, and the second portion 122 can extend toward the outside of the ear (the side of the ear facing away from the head along the coronal axis) and connect to the sound-emitting portion, thereby securing the sound-emitting portion near the user's ear canal without blocking the ear canal opening. In some embodiments, a sound outlet can be provided on the side wall of the housing facing the auricle, thereby directing the sound generated by the transducer out of the housing and toward the user's ear canal opening.

[0057] In some embodiments, the earhook itself is elastic, and the relative position of the sound-emitting portion 11 and the earhook may differ between the worn and unworn states. For example, to facilitate wearing and ensure stability when worn, the distance between the end FE of the sound-emitting portion 11 and the earhook when unworn is smaller than when worn. This causes the sound-emitting portion 11 to move closer to the earhook when worn, creating a clamping force that grips the auricle. The worn and unworn states of the earphone 10 will be described separately below.

[0058] In order to facilitate understanding and description of the shape of the earphone 10 in a non-worn state or a worn state, the earphone 10 can be projected onto a specific plane, and the earphone 10 can be described by parameters related to the projection shape on the plane. As an example only, in the worn state, the earphone 10 can be projected onto the sagittal plane of the human body to form a corresponding projection shape. In the non-worn state, a first plane similar to this can be selected with reference to the relative positional relationship between the sagittal plane of the human body and the earphone 10, so that the projection shape formed by the projection of the earphone 10 on the first plane is close to the projection shape formed by the projection of the earphone 10 on the sagittal plane of the human body. For the convenience of description, refer to Figure 6 In some embodiments, when the user is not wearing the earphones 10, the first plane can be determined based on the shape of the ear hook. For example, the first plane can be determined as follows: the ear hook is placed on a flat support surface (such as a horizontal table, a ground plane, etc.). When the ear hook is in contact with the support surface and is placed stably, the support plane is the first plane corresponding to the earphone 10 at this time. Of course, in order to maintain the uniformity of the specific planes corresponding to the wearing state and the non-wearing state, the first plane can also be the sagittal plane of the human body. The non-wearing state here can be manifested as removing the auricle structure in the user's head model, and using a fixing part or glue to fix the sound-emitting part 11 to the human head model in the same posture as in the wearing state. In some embodiments, the first plane can also refer to the plane formed by the bisector that bisects the ear hook along its length extension direction or approximately bisects it.

[0059] Figure 5 is a schematic diagram of the structure of the earphone in a non-wearing state according to some embodiments of this specification; Figure 6 It is a first projection formed by projecting the earphone in a non-worn state onto the first plane according to some embodiments of this specification.

[0060] Combine Figure 5 and Figure 6In some embodiments, the first projection includes an outer contour, a first end contour, an inner contour, and a second end contour. The first end contour may be a projection contour of the end FE of the sound-emitting portion 11 on the first plane. The two endpoints P0 and P1 of the first end contour are the projection points of the intersection of the end FE and other parts of the sound-emitting portion 11 on the first plane. For the division of the end FE, please refer to the specification. Figure 3 The second end contour may be the projection of the free end BE of the suspension structure 12 onto the first plane. The two endpoints Q0 and Q1 of the second end contour are the projection points of the intersection of the free end BE and the rest of the suspension structure 12 onto the first plane. The outer contour may be the contour whose first projection is between points P1 and Q1. The inner contour may be the contour whose first projection is between points P0 and Q0.

[0061] It should be noted that the free end BE of the suspension structure 12 may be at least a portion of the end of the first portion of the suspension structure 12 that is distal to the second portion. The end of the first portion of the suspension structure 12 that is distal to the second portion may be a regular or irregularly shaped structure. To further illustrate the free end BE of the suspension structure 12, an exemplary description is provided. For example, if the end of the first portion of the suspension structure 12 that is distal to the second portion is a rectangular parallelepiped structure with a flat end wall, the free end BE of the suspension structure 12 may be the sidewall of the end of the first portion of the suspension structure 12 that is distal to the second portion. For another example, if the end of the first portion of the suspension structure 12 that is distal to the second portion is a sphere, ellipsoid, or irregularly shaped structure, the free end BE of the suspension structure 12 may be the region extending from the farthest point distal to the second portion in the direction of extension of the first portion of the suspension structure 12, extending a specific distance toward the second portion. The ratio of this specific distance to the total extension distance of the first portion of the suspension structure 12 may be in the range of 0.05 to 0.2.

[0062] Taking the projection of the sound-emitting portion 11 on the first plane as a rectangular shape (e.g., a runway shape), the projection of the sound-emitting portion 11 includes parallel or nearly parallel upper and lower sidewall projections, as well as a first end contour connecting the upper and lower sidewall projections. The first end contour can be a straight line segment or a circular arc, with points P0 and P1 representing the two ends of the first end contour, respectively. For illustrative purposes only, point P0 can be the intersection of the arc formed by the projection of the end FE and the line segment of the projection of the upper side wall. Similarly, point P1 can be the intersection of the arc formed by the projection of the end FE and the line segment of the projection of the lower side wall. Similarly, the earhook also has a free end at the end facing away from the sound-emitting portion 11. The projection of the free end of the earhook on the first plane forms a second end contour, which can be a straight line segment or a circular arc. Points Q0 and Q1 represent the two ends of the second end contour, respectively. In some embodiments, point Q0 and point Q1 can be the two end points of a line segment or arc projected from the free end of the first part 121 of the ear hook in the direction away from the second part 122 of the ear hook on the first plane. Furthermore, in the long axis direction Y of the sound-emitting part 11, the endpoint close to the sound-emitting part 11 is point Q0, and the endpoint away from the sound-emitting part 11 is Q1.

[0063] The projection shape of the earphone 10 in the first plane and the sagittal plane of the human body can reflect how the earphone 10 is worn on the ear. For example, the area of ​​the first projection can reflect the area of ​​the auricle that the earphone 10 can cover when worn, as well as the contact between the sound-emitting portion 11 and the ear hook and the ear. In some embodiments, because the sound-emitting portion 11 does not contact the first portion 121 of the ear hook, the inner contour, outer contour, first end contour, and second end contour in the first projection form a non-closed area. The size of this area is closely related to the wearing effect of the earphone 10 (for example, wearing stability, sound emission position, etc.). For ease of understanding, in some embodiments, a tangent segment 50 connecting the first end contour and the second end contour can be determined, and the area enclosed by the first closed curve defined by the tangent segment 50, the outer contour, the first end contour, and the second end contour is used as the area of ​​the first projection (also referred to as the "first area").

[0064] In order to make the whole or part of the structure of the sound-emitting part 11 extend into the concha cavity to improve the sound-emitting efficiency of the sound-emitting part 11, wherein the sound-emitting efficiency can be understood as the ratio of the listening volume at the ear canal opening to the sound leakage volume in the far field. Figure 2The wearing position 11B shown in the figure is relative to the position of the ear, so the size of the sound-emitting part 11 can be set smaller to adapt to the size of the concha cavity. In addition, in order to provide a suitable clamping force between the first part 121 of the ear hook and the sound-emitting part 11 at the edge of the concha cavity, so that the earphone 10 can be worn more stably, in the non-wearing state, the distance between the sound-emitting part 11 and the first part 121 of the ear hook should not be too far. In this way, by providing a suitable clamping force, it can be ensured that the earphone 10 is not completely supported by the upper edge of the ear in the wearing state, thereby improving the wearing comfort. Taking the above factors into consideration, the first area enclosed by the first closed curve can be set smaller in the non-wearing state. In some embodiments, the range of the first area enclosed by the first closed curve is not greater than 1500mm 2 .

[0065] In some embodiments, since the ear hook is at least partially configured to rest against the ear and / or head when worn, thereby exerting a force to press the ear, a first area that is too small may cause some people (e.g., those with larger auricles) to experience a foreign body sensation when wearing the ear hook. Therefore, considering the wearing method and ear size, the first area of ​​the first closed curve is not less than 1000 mm. 2 At the same time, in some embodiments, considering that the relative position of the sound-emitting part 11 and the user's ear canal (such as the concha cavity) will affect the number of leakage structures of the cavity-like structure formed by the sound-emitting part 11 and the user's concha cavity and the size of the opening of the leakage structure, and the size of the opening of the leakage structure will directly affect the listening quality. Specifically, if the first area is too small, the sound-emitting part 11 may not be able to abut the edge of the concha cavity, resulting in an increase in the sound component directly radiated outward by the sound-emitting part 11, and less sound reaching the listening position, thereby reducing the sound efficiency of the sound-emitting part 11. In summary, in some embodiments, the first area of ​​the first closed curve can be within the range of 1000mm 2 ~1500mm 2 between.

[0066] In some embodiments, considering the overall structure of the earphone 10 and the shape of the ear hook needs to adapt to the space between the ear and the head, the first area of ​​the first closed curve is not less than 1150mm 2 In some embodiments, in order to ensure the sound efficiency of the sound-emitting portion 11 and the appropriate clamping force, the first area of ​​the first closed curve is not greater than 1350mm. 2 Therefore, in some embodiments, the first area of ​​the first closed curve may be within the range of 1150 mm. 2 ~1350mm 2The first area is between the two sides of the earphone 10 to ensure the sound efficiency of the sound-emitting part 11 and the comfort of the user wearing the earphone 10. At the same time, the appropriate first area can ensure the listening volume of the earphone 10 at the listening position (for example, at the opening of the ear canal), especially the listening volume of the mid- and low-frequency sounds, while maintaining a good far-field sound leakage cancellation effect.

[0067] In order to allow the entire or partial structure of the sound-producing portion 11 to extend into the concha cavity, for example, Figure 2 The wearing position 11B shown in FIG is relative to the ear and forms a Figure 4 The acoustic model shown can set the relative size between the projected area of ​​the sound-emitting portion 11 on the first plane and the first area. In some embodiments, when the earphone 10 is not worn, the projected area of ​​the sound-emitting portion 11 on the first plane and the first area can be relatively small to ensure that the ear canal opening is not blocked when the earphone 10 is worn. This also reduces the load on the user during wear, making it easier for the user to obtain ambient sound or daily communication during daily wear. For example, the projected area of ​​the sound-emitting portion 11 on the first plane can be no more than half of the first area (i.e., the ratio is no greater than 0.5). In some embodiments, the ratio of the projected area of ​​the sound-emitting portion 11 on the first plane to the first area can be between 0.22 and 0.43. Furthermore, the ratio of the projected area of ​​the sound-emitting portion 11 on the first plane to the first area can be between 0.25 and 0.4, thereby reducing the user's wearing sensation.

[0068] Since the size and contour shape of the cavum concha may vary among different users (for example, different ages, different genders, different heights and weights), the overall size of the sound-emitting portion 11 (especially the size along its long axis and short axis) should not be too large or too small. For example, if the projection area of ​​the sound-emitting portion 11 is too small, the sound-emitting portion 11 cannot fully cover the cavum concha, and the gap formed between the sound-emitting portion 11 and the cavum concha is large, resulting in a low listening volume at the user's ear canal opening. When the projection area of ​​the sound-emitting portion 11 is too large, the sound-emitting portion 11 may cover the user's ear canal opening, making it impossible for the ear canal opening to remain open, affecting the user's ability to obtain sounds from the external environment. In order to ensure the listening effect of the user wearing the earphones 10 and at the same time keep the ear canal opening in an open state to obtain sounds from the external environment, in some embodiments, the projection area of ​​the sound-emitting portion 11 can be within 202mm 2 ~560mm 2 On this basis, in order to ensure that the sound-emitting portion 11 has a high sound-emitting efficiency and that the force exerted by the ear hook on the ear when worn is moderate, the first area can be within the range of 1000mm 2 ~1500mm 2 Furthermore, in order to make the sound-emitting portion 11 produce a better listening effect, the first area can be within the range of 1150mm.2 ~1350mm 2 The projection area of ​​the sound-producing part 11 is 330mm 2 ~440mm 2 and the ratio of the projection area of ​​the sound-emitting portion 11 on the first plane to the first area is between 0.25 and 0.4.

[0069] refer to Figure 5 In some embodiments, when the earphone 10 is not being worn, the inner contour, the first end contour, the second end contour, and the tangent segment 50 connecting the first and second end contours collectively define a third closed curve. For ease of understanding, similar to the first area, in some embodiments, the area enclosed by the third closed curve can be used as the area of ​​the third projection (also referred to as the "third area"). The third closed curve can reflect the fit of the sound-emitting portion 11 and the earhook against the ear when the earphone 10 is being worn.

[0070] Considering that the relative position of the sound-emitting portion 11 and the user's ear canal (e.g., the cavum concha) affects the number of leakage structures in the cavity-like structure formed by the sound-emitting portion 11 and the cavum concha, as well as the size of the openings in these leakage structures, the size of these leakage structures directly affects listening quality. Specifically, if the third area is too large, the sound-emitting portion 11 may not abut the edge of the cavum concha, resulting in an increase in the sound components directly radiated outward from the sound-emitting portion 11 and a decrease in the sound reaching the listening position, which in turn reduces the sound emission efficiency of the sound-emitting portion 11. In some embodiments, considering the overall structure of the earphone 10 and the shape of the earhook that needs to accommodate the space between the ear and the head, the third area should not be too large. Therefore, the ratio of the projected area of ​​the sound-emitting portion 11 on the first plane to the extent of the third area of ​​the third closed curve should be no less than 0.6. An excessively small third area can result in excessive clamping force between the earhook and the sound-emitting portion 11 on the user's auricle. Therefore, in some embodiments, the ratio of the projected area of ​​the sound-emitting portion 11 on the first plane to the extent of the third area of ​​the third closed curve should be no greater than 1.12. In summary, in some embodiments, the ratio of the projected area of ​​the sound-emitting portion 11 on the first plane to the range of the third area of ​​the third closed curve is between 0.6 and 1.12. Furthermore, an excessively large third area may reduce the clamping effect between the ear hook and the sound-emitting portion 11. In this case, the weight of the earphone 10 is supported by the upper edge of the user's ear, resulting in an increased foreign body sensation. To ensure user wearing comfort and prevent an excessively small third area from affecting the sound-emitting portion 11's insertion into the concha cavity, the ratio of the projected area of ​​the sound-emitting portion 11 on the first plane to the range of the third area is between 0.67 and 1.06.

[0071] In some embodiments, based on the ratio of the projection area of ​​the sound-emitting portion 11 on the first plane to the third area of ​​the third closed curve, the third area can be within a range of 200 mm. 2~600mm 2 Furthermore, in order to ensure the listening volume of the earphone 10 at the listening position (for example, at the ear canal opening) and improve the comfort of the user when wearing it, the range of the third area is 300mm 2 ~500mm 2 between.

[0072] In some embodiments, the difference between the first area and the third area is equal to the projected area of ​​the earphone 10 on the first plane (i.e., the sum of the projected area of ​​the sound-emitting portion 11 on the first plane and the projected area of ​​the earhook on the first plane). Generally, to enable users to achieve higher listening volume at the listening position, it is necessary to increase the size of the transducer or increase the battery input power (or input voltage) to the transducer. Increasing the size of the transducer results in an increase in the size of the sound-emitting portion 11. While not affecting the battery life of the earphone 10, increasing the battery input power to the transducer also results in an increase in the battery compartment area. In some embodiments, because the sound-emitting portion 11 is at least partially inserted into the cavum conchae when worn, the sound-emitting portion 11 can improve its sound emission efficiency. Therefore, the sound-emitting portion 11 can be smaller in size (i.e., the earphone 10 has a smaller volume), ensuring that the sound-emitting portion 11 can provide higher listening volume at the listening position. In this case, the ratio of the projected area of ​​the sound-emitting portion 11 on the first plane to the projected area of ​​the earphone 10 on the first plane is no greater than 0.65. In some embodiments, in order to avoid a large gap between the sound-emitting part 11 and the cavum conchae, which results in a decrease in the listening volume at the user's ear canal opening, the size of the sound-emitting part 11 should not be too small. At this time, the ratio of the projected area of ​​the sound-emitting part 11 on the first plane to the projected area of ​​the earphone 10 on the first plane is not less than 0.28. In order to ensure that the sound-emitting part can provide sufficient listening volume in the worn state, correspondingly, in the non-worn state, the ratio of the projected area of ​​the sound-emitting part 11 on the first plane to the projected area of ​​the earphone 10 on the first plane is between 0.28 and 0.65. Furthermore, in order to improve the listening effect when the user wears the earphone 10, the ratio of the projected area of ​​the sound-emitting part 11 on the first plane to the projected area of ​​the earphone 10 on the first plane is between 0.35 and 0.59.

[0073] As described above, the difference between the first area and the third area is equal to the projected area of ​​the earphone 10 on the first plane. In some embodiments, when not wearing the earphone, the ratio of the projected area of ​​the sound-emitting portion 11 on the first plane to the projected area of ​​the earphone 10 on the first plane is between 0.28 and 0.65, and the projected area of ​​the earphone 10 on the first plane is within a range of 500 mm. 2 ~1180mm 2Furthermore, in order to control the size of the sound-emitting portion 11 within an appropriate range to improve the wearing comfort of the earphone 10 when the sound-emitting portion 11 can be inserted into the concha cavity, the ratio of the projected area of ​​the sound-emitting portion 11 on the first plane to the projected area of ​​the earphone 10 on the first plane is between 0.35 and 0.59, and the projected area of ​​the earphone 10 on the first plane is within a range of 650 mm. 2 ~970mm 2 between.

[0074] Figure 8 Schematic diagram of the difference in shape between the earphone 10 in the wearing state and the non-wearing state according to some embodiments of this specification. The dotted area represents the first part of the ear hook in the wearing state, which is farther from the end FE of the sound-emitting part 11 than the first part of the ear hook in the non-wearing state. In the wearing state, the ear hook and the sound-emitting part 11 form a second projection on the sagittal plane of the human body, similar to Figure 5 The first projection shown in the figure also includes an outer contour, a first end contour, an inner contour, and a second end contour, and the outer contour, the first end contour, the second end contour, and the tangent segment connecting the first end contour and the second end contour together define a second closed curve. As described above, the projection shape of the earphone 10 when projected on the first plane is close to the projection shape of the earphone 10 when projected on the sagittal plane of the human body. Therefore, in the second projection, the following method can still be used: Figure 5 The contour boundary points of the second projection, namely point P0, point P1, point Q0 and point Q1, are used to describe the division of each contour in the second projection. That is to say, the definitions of the outer contour, the first end contour, the inner contour, the second end contour and the tangent segment in the second projection are similar to those of the first contour and are not repeated here. The area enclosed by the second closed curve is deemed to be the area of ​​the second projection (also referred to as the "second area"). In some embodiments, the second area can reflect the fit of the earphone 10 to the user's ear when worn.

[0075] In some embodiments, the second area of ​​the second closed curve can be obtained by simulating the shape of the earphone 10 when worn. For example, the relative positions of the various components of the earphone 10 can be fixed when worn, ensuring that they remain unchanged after the earphone is removed from the ear (or the ear model is removed). This allows the earphone's shape to be determined when worn. Furthermore, the second area can be determined based on the projection of the earphone in this shape onto the first plane.

[0076] Because the distance between the ear hook and the sound-emitting portion 11 increases when the earphone 10 is worn, the second area enclosed by the second closed curve is larger than the first area enclosed by the first closed curve. In some embodiments, in order to allow the sound-emitting portion 11 to extend into the concha cavity and the ear hook to fit the ear better when worn, the difference between the second area and the first area should be within a certain range. For example, the second area can be 20 mm larger than the first area. 2 ~500mm 2 In some embodiments, the second area may be 50 mm larger than the first area. 2 ~400mm 2 In some embodiments, the second area may be 60 mm larger than the first area. 2 ~100mm 2 .

[0077] Since the difference between the second area and the first area is within a certain range, the ratio of the projected area of ​​the sound-emitting portion 11 on the first plane to the second area of ​​the second closed curve is slightly smaller than the ratio of the projected area of ​​the sound-emitting portion 11 on the first plane to the first area of ​​the first closed curve. For example, the ratio of the projected area of ​​the sound-emitting portion 11 on the first plane to the second area is in the range of 0.18 to 0.42. Furthermore, in order to ensure that the user's ear canal opening is not blocked when wearing the earphones 10, and at the same time reduce the load on the user when wearing the earphones, so as to facilitate the user to obtain ambient sound or daily communication during daily wear, the ratio of the projected area of ​​the sound-emitting portion 11 on the first plane to the second area of ​​the second closed curve is in the range of 0.2 to 0.35.

[0078] Based on similar reasons as the first area, an appropriate second area can ensure the listening volume of the earphone 10 at the listening position (e.g., at the ear canal opening), especially the listening volume of mid- and low-frequency sounds, while maintaining a good far-field sound leakage cancellation effect. In some embodiments, the second area is within the range of 1100mm 2 ~1700mm 2 Furthermore, considering the ratio range of the projection area of ​​the sound-emitting portion 11 to the second area, the second area can be in the range of 1300mm 2 ~1650mm 2 In order to take into account both listening quality and leakage reduction effect.

[0079] In some embodiments, when the earphone 10 is worn, the inner contour, the first end contour, the second end contour, and the tangent segment 50 connecting the first and second end contours collectively define a fourth closed curve. Similar to the third area, in some embodiments, the area enclosed by the fourth closed curve can be used as the area of ​​the fourth projection (also referred to as the "fourth area"). The difference between the fourth closed curve and the third closed curve can reflect the fit of the sound-emitting portion 11 and the earhook against the ear when the earphone 10 is worn.

[0080] In some embodiments, due to the earhook's elasticity, the distance between the earhook and the sound-emitting portion 11 increases when the earphone 10 is worn. Therefore, the fourth area formed when the earphone 10 is worn is larger than the third area formed when the earphone 10 is not worn. In some embodiments, if the fourth area is too large, the sound-emitting portion 11 may not contact the edge of the cavum concha, resulting in an increase in the sound component directly radiated outward by the sound-emitting portion 11 and a decrease in the sound reaching the listening position, which in turn reduces the sound emission efficiency of the sound-emitting portion 11. On the other hand, if the fourth area is too small, the earhook and the sound-emitting portion 11 may clamp the user's auricle too tightly. Therefore, in some embodiments, the ratio of the projected area of ​​the sound-emitting portion 11 on the first plane to the fourth area of ​​the fourth closed curve is between 0.46 and 0.77. Furthermore, to ensure user comfort while preventing an excessively small third area from affecting the sound-emitting portion 11's penetration into the cavum concha, the ratio of the projected area of ​​the sound-emitting portion 11 to the fourth area is between 0.51 and 0.72.

[0081] In some embodiments, based on the ratio range of the projection area of ​​the sound-emitting portion 11 to the fourth area, the fourth area of ​​the fourth closed curve is within the range of 350 mm 2 ~900mm 2 Furthermore, an excessively large fourth area may reduce the clamping effect between the ear hook and the sound-emitting portion 11. At this time, the weight of the earphone 10 is supported by the upper edge of the user's ear, resulting in an increased wearing feeling. In order to ensure the user's wearing comfort, as well as to ensure the listening volume of the earphone 10 at the listening position (for example, at the ear canal opening), and to improve the user's wearing comfort, the fourth area is within the range of 450mm. 2 ~750mm 2 between.

[0082] Reference again Figure 5 and Figure 6 As described above, considering the differences in ear shapes and sizes of different users, the wearing effect of the earphone 10 can be effectively improved by designing the relative size between the first area and the projection area of ​​the auricle on the human sagittal plane. Since the ear shapes and sizes of different users may vary, this manual will take the average range of the projection area of ​​the auricle on the human sagittal plane as a reference, which is within 1300mm. 2~1700mm 2 In some embodiments, the ratio of the projection area of ​​the sound-emitting part 11 on the first plane to the projection area of ​​the auricle on the sagittal plane of the human body is between 0.15 and 0.35. The ratio of the projection area of ​​the sound-emitting part 11 on the first plane to the projection area of ​​the auricle on the sagittal plane of the human body is within the aforementioned range, which can ensure good sound efficiency and listening effect of the sound-emitting part 11. It should be noted that for some users, due to individual differences among users, the projection area of ​​the auricle on the sagittal plane of the human body may be less than 1300mm 2 or greater than 1700mm 2 In this case, the ratio of the first area to the projected area of ​​the auricle on the sagittal plane of the human body may be greater than 0.33 or less than 0.15. For example, the ratio of the projected area of ​​the sound-producing part 11 on the first plane to the projected area of ​​the auricle on the sagittal plane of the human body is between 0.1 and 0.38.

[0083] As described above, when the user wears the earphone 10, at least part of the sound-emitting portion 11 thereof can extend into the user's concha cavity, forming a Figure 4 As the sound-producing part 11 cannot fit tightly with the concha cavity, a gap is formed. Figure 4 That is, when the earphone 10 is worn, part or all of the sound-emitting portion 11 extends into the concha cavity, the projection of the sound-emitting portion 11 on the sagittal plane of the human body and the projection of the concha cavity on the sagittal plane of the human body have an overlapping area. Furthermore, the ratio of the overlapping area will affect Figure 4 The opening area of ​​the leakage structure 403 of the cavity-like structure 402 in the acoustic model shown in . For example, when the overlap ratio between the sound-producing portion 11 and the cavum concha is relatively large, the sound-producing portion 11 can cover a larger area of ​​the cavum concha. In this case, the gap between the sound-producing portion 11 and the cavum concha is smaller, that is, the opening area of ​​the leakage structure 403 of the cavity-like structure 402 is smaller.

[0084] Figure 9 is a schematic diagram of a cavity-like structure according to some embodiments of this specification; Figure 10 : is a listening index curve diagram of a cavity-like structure with leakage structures of different sizes according to some embodiments of this specification. Figure 9 As shown, the opening area of ​​the leakage structure on the cavity-like structure is S, and the sound source contained in the cavity-like structure is ( Figure 9 The area of ​​direct action is S0. Here, "direct action" means that the sound emitted by the contained sound source directly acts on the wall of the cavity-like structure without passing through the leakage structure. The distance between the two sound sources is d0, and the distance from the center of the opening shape of the leakage structure to the other sound source (with Figure 9The distance between the “-” shown in the figure is L. Figure 10 As shown, keeping L / d0=1.09 unchanged, the larger the relative opening size S / S0, the smaller the listening index. The listening index here may refer to the sound pressure level intensity measured at the listening position. This is because the larger the relative opening, the more sound components directly radiated outward by the contained sound source, and the less sound reaching the listening position, causing the listening volume to decrease as the relative opening increases, which in turn leads to a smaller listening index. It can be inferred that the larger the opening, the smaller the listening volume at the listening position. In some embodiments, in order to ensure the listening volume at the ear canal opening when the user wears the earphones 10, the projection area of ​​the sound-emitting part 11 can be compared with the projection area of ​​the concha cavity on the sagittal plane of the human body (for example Figure 7 The overlap ratio (the area enclosed by the dotted box 1015 in the figure) is controlled within a specific range to control the size of the opening. It should be noted that in the embodiments of this specification, the overlap ratio can be understood as the ratio of the overlapping area of ​​the projected area of ​​the sound-producing part 11 and the projected area of ​​the cavum concha on the human sagittal plane to the projected area of ​​the cavum concha on the human sagittal plane.

[0085] Figure 11 This is a schematic diagram of exemplary frequency response curves corresponding to different overlapping ratios of the projection area of ​​the sound-producing part 11 and the projection area of ​​the user's concha cavity on the sagittal plane of the human body according to some embodiments of this specification. Figure 11 In the figure, the horizontal axis represents the frequency (unit: Hz), and the vertical axis represents the frequency response at the ear canal opening corresponding to different overlap ratios (unit: dB). Figure 11 It can be seen that when the user wears the earphones 10 and at least part of the structure of the sound-emitting part 11 covers the cavum concha, that is, when the projection of the sound-emitting part 11 and the projection of the cavum concha on the human body sagittal plane have an overlapping area, the listening volume at the user's ear canal opening is significantly improved compared to when the projection of the sound-emitting part 11 and the projection of the cavum concha on the human body sagittal plane do not have an overlapping area (the overlapping ratio is 0%), especially in the mid- and low-frequency range. In some embodiments, in order to improve the listening effect when the user wears the earphones 10, the overlapping ratio of the projection area of ​​the sound-emitting part 11 and the projection area of ​​the user's cavum concha on the human body sagittal plane can be no less than 9.26%. Continue to refer to Figure 11As the overlap ratio between the projected area of ​​the sound-emitting portion 11 and the projected area of ​​the user's concha on the sagittal plane increases, the user's listening volume at the ear canal opening is significantly improved. In particular, when the overlap ratio between the projected area of ​​the sound-emitting portion 11 and the projected area of ​​the user's concha on the sagittal plane increases from 36.58% to 44.01%, the listening experience is significantly improved. Therefore, to further enhance the user's listening experience, the overlap ratio between the projected area of ​​the sound-emitting portion 11 and the projected area of ​​the user's concha on the sagittal plane is no less than 44.01%. Furthermore, the overlap ratio between the projected area of ​​the sound-emitting portion 11 and the projected area of ​​the user's concha on the sagittal plane is no less than 57.89%. It should be noted that the frequency response curve corresponding to the overlapping ratio of the projected area of ​​the sound-emitting part 11 and the projected area of ​​the user's concha on the sagittal plane of the human body measured in the embodiment of this specification is measured by changing the wearing position of the sound-emitting part 11 (for example, translating along the sagittal axis or vertical axis) when the wearing angle of the sound-emitting part 11 (the angle between the upper side wall or the lower side wall and the horizontal direction) and the size of the sound-emitting part 11 are constant.

[0086] The earphone 10 provided in the embodiment of the present specification can make the sound-emitting portion 11 and the user's cavum concha better cooperate to form a sound-emitting portion 11 and the user's cavum concha by extending at least part of the sound-emitting portion 11 into the cavum concha, and the overlap ratio of the projection area of ​​the sound-emitting portion 11 and the projection area of ​​the user's cavum concha on the sagittal plane of the human body is controlled to be not less than 44.01%. Figure 4 The acoustic model shown in FIG. 1 is used to improve the listening volume of the earphone 10 at the listening position (e.g., at the opening of the ear canal), especially the listening volume of mid- and low-frequency sounds. On this basis, the size of the transducer or battery can be appropriately reduced, thereby reducing the ratio of the second area to the projected area of ​​the auricle on the human sagittal plane. In some embodiments, to ensure that the earphone 10 is worn in a manner that extends into the cavum concha and that the sound-emitting portion 11 has high sound emission efficiency and wearing comfort, the overlap ratio between the projected area of ​​the sound-emitting portion 11 and the projected area of ​​the user's cavum concha on the human sagittal plane can be no less than 44.01%, and the ratio of the second area to the projected area of ​​the auricle on the human sagittal plane can be between 0.8 and 1.1. Furthermore, in order to enable the sound-emitting portion 11 to form a more ideal cavity-like structure with the cavum conchae, the overlap ratio between the projected area of ​​the sound-emitting portion 11 and the projected area of ​​the cavum conchae on the human body sagittal plane can be not less than 57.89%, and the ratio of the second area to the projected area of ​​the auricle on the human body sagittal plane is between 0.85 and 1.03. It should be noted that this ratio is based on the average range of the projected area of ​​the auricle on the human body sagittal plane as a reference, and the average range is 1300mm. 2 ~1700mm 2 For some users, the projection area of ​​their auricle on the sagittal plane may be less than 1300mm.2 or greater than 1700mm 2 In this case, the ratio of the first area to the projection area of ​​the auricle on the sagittal plane of the human body may be greater than 1.1 or less than 0.8. For example, the ratio of the second area to the projection area of ​​the auricle on the sagittal plane of the human body is between 0.65 and 1.3.

[0087] It should also be noted that in order to ensure that the ear canal opening is not blocked when the user wears the earphone 10, and to keep the ear canal opening open so that the user can hear both the sound output by the earphone 10 and the sound in the external environment, the overlap ratio between the projected area of ​​the sound-emitting portion 11 and the projected area of ​​the cavum concha on the sagittal plane of the human body should not be too large. When worn, if the overlap ratio between the projected area of ​​the sound-emitting portion 11 and the projected area of ​​the cavum concha on the sagittal plane of the human body is too small, the size of the sound-emitting portion 11 extending into the cavum concha is too small, resulting in a small contact area between the sound-emitting portion 11 and the cavum concha. The cavum concha cannot provide sufficient support and position-limiting effect for the sound-emitting portion 11, resulting in unstable wearing and easy falling off. On the other hand, the gap formed between the sound-emitting portion 11 and the cavum concha is too large, affecting the listening volume at the ear canal opening of the user. In order to ensure that the earphone 10 does not block the user's ear canal, ensure the stability and comfort of the user wearing the earphone 10 and have a good listening effect, in some embodiments, the overlap ratio of the projected area of ​​the sound-emitting portion 11 and the projected area of ​​the user's cavum concha on the sagittal plane of the human body can be 44.01% to 77.88%, so that when part or the entire structure of the sound-emitting portion 11 extends into the cavum concha, the force exerted by the cavum concha on the sound-emitting portion 11 can play a certain supporting and limiting role on the sound-emitting portion 11, thereby improving its wearing stability and comfort. At the same time, the sound-emitting portion 11 can also form a Figure 4 The acoustic model shown ensures the user's listening volume at the listening position (e.g., at the ear canal opening) while reducing far-field sound leakage. Furthermore, the overlap ratio between the projected area of ​​the sound-emitting portion 11 and the projected area of ​​the user's cavum concha on the sagittal plane can be 46% to 71.94%. Furthermore, the overlap ratio between the projected area of ​​the sound-emitting portion 11 and the projected area of ​​the user's cavum concha on the sagittal plane can be 57.89% to 62%, thereby optimizing the gap size in the cavity-like structure formed between the sound-emitting portion 11 and the user's cavum concha for improved listening volume.

[0088] The ratio of the overlapping area between the projection of the sound-producing portion 11 on the sagittal plane and the projection of the cavum concha on the sagittal plane to the projected area of ​​the sound-producing portion 11 on the sagittal plane (i.e., the overlapping ratio between the projected area of ​​the sound-producing portion 11 and the projected area of ​​the user's cavum concha on the sagittal plane) can reflect the overall extent of the sound-producing portion 11's penetration into the cavum concha, thereby affecting the sound production efficiency of the sound-producing portion 11. In some embodiments, to ensure stability and comfort for the user while wearing the earphone 10 without blocking the user's ear canal and achieving good sound production efficiency, the overlapping ratio between the projected area of ​​the sound-producing portion 11 and the projected area of ​​the user's cavum concha on the sagittal plane can be 46% to 71.94%, and the overlapping ratio between the projected area of ​​the sound-producing portion 11 and the projected area of ​​the cavum concha on the sagittal plane to the projected area of ​​the sound-producing portion 11 on the sagittal plane can be no less than 40.4%. Preferably, the overlapping ratio of the projection area of ​​the sound-emitting part 11 and the projection area of ​​the user's cavum concha on the sagittal plane of the human body can be 57.89% to 62%, and the overlapping area of ​​the projection of the sound-emitting part on the sagittal plane of the human body and the projection of the cavum concha on the sagittal plane of the human body to the projection area of ​​the sound-emitting part 11 on the sagittal plane of the human body is not less than 42.16%, so that the sound-emitting part 11 extends to the appropriate position in the cavum concha, thereby ensuring the listening effect.

[0089] Figures 12A to 12C Schematic diagram of different exemplary fitting positions of the earphone 10 and the user's ear canal according to this specification.

[0090] The size of the gap between the sound-producing part 11 and the edge of the cavum concha is also related to the distance between the distal end FE of the sound-producing part 11 and the edge of the cavum concha. This distance can be characterized by the distance between the midpoint of the projection of the distal end FE of the sound-producing part 11 onto the human sagittal plane and the projection of the edge of the cavum concha onto the human sagittal plane. The cavum concha refers to the concave area below the crus of the helix. In other words, the edge of the cavum concha is composed of at least the lateral wall below the crus of the helix, the outline of the tragus, the intertragic notch, the apex of the antihelix, the tragus notch, and the outline of the antihelical body corresponding to the cavum concha. The projection of the edge of the cavum concha onto the human sagittal plane is the outline of the cavum concha projected onto the human sagittal plane. Specifically, one end of the sound-producing portion 11 is connected to the suspension structure 12 (the second portion 122 of the earhook). When worn by a user, part or all of the sound-producing portion 11 extends into the cavum concha. The position of the distal end FE (free end) of the sound-producing portion 11 relative to the edge of the cavum concha affects the overlap ratio between the projected area of ​​the sound-producing portion 11 and the projected area of ​​the cavum concha on the human sagittal plane, thereby affecting the size of the gap formed between the sound-producing portion 11 and the cavum concha, and thus the volume at the user's ear canal opening. Furthermore, the distance between the midpoint of the projection of the distal end FE of the sound-producing portion 11 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane can reflect the position of the distal end FE of the sound-producing portion 11 relative to the cavum concha and the extent to which the sound-producing portion 11 covers the user's cavum concha. It should be noted that when the projection of the terminal FE of the sound-producing part 11 on the sagittal plane of the human body is a curve or a broken line, the midpoint of the projection of the terminal FE of the sound-producing part 11 on the sagittal plane of the human body can be selected by the following exemplary method: the two points of the projection of the terminal FE on the sagittal plane of the human body along its short axis with the largest distance can be selected to make a line segment, the midpoint of the line segment can be selected as the perpendicular bisector, and the point where the perpendicular bisector intersects with the projection is the midpoint of the projection of the terminal FE of the sound-producing part 11 on the sagittal plane of the human body. In some embodiments, when the terminal FE of the sound-producing part 11 is a curved surface, the tangent point of the tangent line parallel to the short axis direction Z on its projection can also be selected as the midpoint of the projection of the terminal FE of the sound-producing part 11 on the sagittal plane of the human body.

[0091] like Figure 12A As shown, when the sound-producing part 11 is not against the edge of the concha 102, the end FE of the sound-producing part 11 is located in the concha 102, that is, the midpoint of the projection of the end FE of the sound-producing part 11 on the sagittal plane of the human body does not overlap with the projection of the edge of the concha 102 on the sagittal plane of the human body. Figure 12B As shown, the sound-emitting portion 11 of the earphone 10 extends into the concha cavity 102, and the end FE of the sound-emitting portion 11 abuts against the edge of the concha cavity 102. In other words, the midpoint of the projection of the end FE of the sound-emitting portion 11 on the sagittal plane of the human body overlaps with the projection of the edge of the concha cavity 102 on the sagittal plane of the human body. Figure 12CAs shown, the sound-emitting portion 11 of the earphone 10 covers the cavum concha, and the end FE of the sound-emitting portion 11 is located between the edge of the cavum concha 102 and the inner contour 1014 of the auricle.

[0092] Combine Figures 12A to 12C When the distal end FE of the sound-producing part 11 is located within the edge of the cavus concha 102, if the distance between the midpoint C3 of the projection of the distal end FE of the sound-producing part 11 on the human sagittal plane and the projection of the edge of the cavus concha 102 on the human sagittal plane is too large, the overlap ratio between the projection area of ​​the sound-producing part 11 and the projection area of ​​the cavus concha 102 on the human sagittal plane is too small, and the gap formed between the sound-producing part 11 and the edge of the cavus concha 102 is large, affecting the listening volume at the user's ear canal opening. When the midpoint C3 of the projection of the distal end FE of the sound-producing part 11 on the human sagittal plane is located between the projection of the edge of the cavus concha 102 on the human sagittal plane and the projection of the inner contour 1014 of the auricle on the human sagittal plane, if the distance between the midpoint C3 of the projection of the distal end FE of the sound-producing part 11 on the human sagittal plane and the projection of the edge of the cavus concha 102 on the human sagittal plane is too large, the distal end FE of the sound-producing part 11 will interfere with the auricle, and the coverage ratio of the sound-producing part 11 over the cavus concha 102 will not be increased. Furthermore, when worn by a user, if the distal end FE of the sound-producing portion 11 is not located within the cavum concha 102, the edge of the cavum concha 102 will not be able to restrain the sound-producing portion 11, making it prone to falling off. Furthermore, an increase in the size of the sound-producing portion 11 increases its weight, affecting the user's wearing comfort and portability. It should be noted that when the projection of the distal end FE of the sound-producing portion 11 on the sagittal plane of the human body is a curve or a broken line, the midpoint of the projection of the distal end FE of the sound-producing portion 11 on the sagittal plane of the human body can be selected using the following exemplary method: a line segment can be drawn from the starting and ending points of the projection of the distal end FE on the sagittal plane of the human body, and the midpoint of the line segment can be selected as the perpendicular midpoint. The point where the perpendicular midpoint intersects the projection is the midpoint of the projection of the distal end FE of the sound-producing portion 11 on the sagittal plane of the human body. In some embodiments, when the distal end FE of the sound-producing portion 11 is a curved surface, the tangent point of a tangent to the projection parallel to the minor axis Z can also be selected as the midpoint of the projection of the distal end FE of the sound-producing portion 11 on the sagittal plane of the human body.

[0093] Figure 13 This is a schematic diagram of exemplary frequency response curves corresponding to different distances between the projection of the end of the sound-producing part 11 on the sagittal plane of the human body and the projection of the edge of the concha cavity on the sagittal plane of the human body according to some embodiments of this specification. Figure 13, where the horizontal axis represents frequency (unit: Hz), and the vertical axis represents the sound pressure level at the ear canal opening at different frequencies (unit: dB). The frequency response curve 1201 is the frequency response curve when the projection distance between the midpoint C3 of the projection of the end of the sound-emitting part 11 on the human sagittal plane and the edge of the cavum concha on the human sagittal plane is 0 mm (for example, when worn, the end of the sound-emitting part 11 abuts against the edge of the cavum concha). The frequency response curve 1202 is the frequency response curve when the projection distance between the midpoint C3 of the projection of the end of the sound-emitting part 11 on the human sagittal plane and the edge of the cavum concha on the human sagittal plane is 4.77 mm. The frequency response curve 1203 is the frequency response curve when the projection distance between the midpoint C3 of the projection of the end of the sound-emitting part 11 on the human sagittal plane and the edge of the cavum concha on the human sagittal plane is 4.77 mm. The frequency response curve is when the distance between point C3 and the edge of the cavum concha projected on the human body sagittal plane is 7.25 mm. The frequency response curve 1204 is when the distance between the midpoint C3 of the projection of the end of the sound-producing part 11 on the human body sagittal plane and the edge of the cavum concha projected on the human body sagittal plane is 10.48 mm. The frequency response curve 1205 is when the distance between the midpoint C3 of the projection of the end of the sound-producing part 11 on the human body sagittal plane and the edge of the cavum concha projected on the human body sagittal plane is 15.3 mm. The frequency response curve 1206 is when the distance between the midpoint C3 of the projection of the end of the sound-producing part 11 on the human body sagittal plane and the edge of the cavum concha projected on the human body sagittal plane is 19.24 mm. Figure 13It can be seen that when the distance between the midpoint C3 of the projection of the distal end of the sound-emitting portion 11 on the human sagittal plane and the edge of the cavum concha on the human sagittal plane is 0 mm (for example, when worn, the distal end of the sound-emitting portion 11 abuts the edge of the cavum concha), 4.77 mm, and 7.25 mm, the sound pressure level measured at the ear canal opening is relatively high. When the distance between the midpoint C3 of the projection of the distal end of the sound-emitting portion 11 on the human sagittal plane and the edge of the cavum concha on the human sagittal plane is 19.24 mm (for example, when worn, the distal end of the sound-emitting portion 11 abuts the edge of the cavum concha), the sound pressure level measured at the ear canal opening is relatively low. That is, when worn, the greater the distance between the midpoint C3 of the projection of the distal end of the sound-emitting portion 11 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane, that is, the less the structure of the sound-emitting portion 11 extends into the cavum concha, the smaller the overlap ratio between the area of ​​the first projection of the sound-emitting portion 11 on the human sagittal plane and the area of ​​the projection of the edge of the cavum concha on the human sagittal plane, and the worse the listening experience at the ear canal opening. Based on this, to ensure that the earphone 10 provides a good listening experience while also ensuring user comfort and stability, in some embodiments, the distance between the midpoint C3 of the projection of the distal end FE of the sound-emitting portion 11 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane is no greater than 16 mm. Furthermore, the distance between the midpoint C3 of the projection of the distal end FE of the sound-emitting portion 11 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane is no greater than 13 mm. Furthermore, the distance between the midpoint C3 of the projection of the distal end FE of the sound-emitting portion 11 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane can be 0 mm to 10.92 mm. In this case, the size of the gap in the cavity-like structure formed between the sound-emitting portion 11 and the user's cavum concha is more conducive to improving the listening volume. By way of example only, in some embodiments, the distance between the midpoint C3 of the projection of the distal end FE of the sound-emitting portion 11 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane can be 0 mm to 15.3 mm. Furthermore, the distance between the midpoint C3 of the projection of the distal end FE of the sound-emitting portion 11 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane can be 0 mm to 10.48 mm. Still further, the distance between the midpoint C3 of the projection of the distal end FE of the sound-emitting portion 11 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane can be 0 mm to 7.25 mm. Furthermore, the distance between the midpoint C3 of the projection of the end FE of the sound-producing part 11 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane can be 0 mm to 4.77 mm. In some embodiments, the end of the sound-producing part 11 can abut against the edge of the cavum concha, which can be understood as the projection of the end FE of the sound-producing part 11 on the human sagittal plane overlaps with the projection of the edge of the cavum concha on the human sagittal plane (for example, Figure 12AThe position of the sound-emitting part 11 relative to the cavum concha shown in the figure), that is, when the distance between the projection of the end of the sound-emitting part 11 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane is 0 mm, the sound-emitting part 11 can have a better frequency response. At this time, the end of the sound-emitting part 11 is against the edge of the cavum concha, which can support and limit the sound-emitting part 11, thereby improving the stability of the user wearing the earphone 10. It should be noted that, in some embodiments, the distance between the midpoint C3 of the projection of the end FE of the sound-emitting part 11 on the human sagittal plane and the projection of the edge of the cavum concha 102 on the human sagittal plane can refer to the minimum distance from the midpoint C3 of the projection of the end FE of the sound-emitting part 11 on the human sagittal plane to the projection of the edge of the cavum concha 102 on the human sagittal plane. In some embodiments, the distance between the midpoint C3 of the projection of the end FE of the sound-emitting part 11 on the human sagittal plane and the projection of the edge of the cavum concha 102 on the human sagittal plane can also refer to the distance along the sagittal axis. In addition, Figure 13The distances between the projection of the end of the sound-emitting part 11 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane involved in the figure are all measured in the scenario where the end of the sound-emitting part 11 extends into the cavum concha. It should be noted that, in a specific wearing scenario, other points other than the midpoint C3 of the projection of the end FE of the sound-emitting part 11 on the human sagittal plane may be against the edge of the cavum concha. At this time, the distance between the midpoint C3 of the projection of the end FE of the sound-emitting part 11 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane may be greater than 0 mm. Preferably, the distance between the midpoint C3 of the projection of the end FE of the sound-emitting part 11 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane may be 2 mm to 16 mm. Furthermore, the distance between the midpoint C3 of the projection of the distal end FE of the sound-producing portion 11 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane can be 4 mm to 10.48 mm. This allows the size of the gap in the cavity-like structure formed between the sound-producing portion 11 and the user's cavum concha to be more conducive to improving listening volume. Furthermore, the cavum concha 102 is a concave structure, and the sidewalls corresponding to the cavum concha 102 are not flat. The projection of the edge of the cavum concha on the human sagittal plane is an irregular two-dimensional shape. The projection of the sidewalls corresponding to the cavum concha 102 on the human sagittal plane may be within or outside the contour of this shape. Therefore, the midpoint of the projection of the distal end FE of the sound-producing portion 11 on the human sagittal plane and the projection of the edge of the cavum concha 102 on the human sagittal plane may not overlap. For example, the midpoint of the projection of the distal end FE of the sound-producing portion 11 on the human sagittal plane may be inside or outside the projection of the edge of the cavum concha 102 on the human sagittal plane. In the embodiments of the present specification, when the end FE of the sound-emitting part 11 is located in the cavum concha 102, the distance between the midpoint of the projection of the end FE of the sound-emitting part 11 on the sagittal plane of the human body and the projection of the edge of the cavum concha 102 on the sagittal plane of the human body can be considered as the end FE of the sound-emitting part 11 abutting the edge of the cavum concha 102 within a specific range (for example, not more than 6 mm).

[0094] In some embodiments, the distance between the projection of the end of the sound-emitting portion 11 and the projection of the edge of the cavum concha is within a suitable range, which can achieve higher sound emission efficiency. On this basis, the size of the transducer or battery can be appropriately reduced, thereby reducing the ratio of the second area to the projected area of ​​the auricle on the human sagittal plane. In some embodiments, the distance between the projection of the end of the sound-emitting portion 11 and the projection of the edge of the cavum concha on the human sagittal plane is no greater than 16 mm, and the ratio of the second area to the projected area of ​​the auricle on the human sagittal plane is between 0.8 and 1.1. In some embodiments, the distance between the projection of the end of the sound-emitting portion 11 and the projection of the edge of the cavum concha on the human sagittal plane is between 0 mm and 15.3 mm, and the ratio of the second area to the projected area of ​​the auricle on the human sagittal plane is between 0.76 and 1.05. This reduces sound leakage from the cavity-like structure formed by the sound-emitting portion 11 and the user's ear, allowing more sound to enter the ear canal and ensure a good listening experience.

[0095] It should be noted that the frequency response curves corresponding to different distances between the midpoint of the projection of the end FE of the sound-emitting part 11 on the sagittal plane of the human body and the projection of the edge of the concha on the sagittal plane of the human body measured in the embodiments of this specification are measured by changing the wearing position of the sound-emitting part 11 (for example, translating along the sagittal axis) when the wearing angle of the sound-emitting part 11 (the angle between the upper side wall or the lower side wall and the horizontal direction), and the dimensions in the long axis direction, the short axis direction and the thickness direction are constant.

[0096] For the convenience of description, Figure 7 The projection of the sound-producing part 11 is surrounded by a rectangular area indicated by a solid-line frame P, and the centroid O of the rectangular area indicated by the solid-line frame P is approximately regarded as the centroid of the projection of the sound-producing part 11. It should be noted that the above description of the projection of the sound-producing part 11 and its centroid is only an example. The shape of the projection of the sound-producing part 11 is related to the shape of the sound-producing part 11 or the wearing condition of the sound-producing part 11 relative to the ear.

[0097] In some embodiments, reference Figures 12A to 12C When the earphone 10 is in the wearing state, the projection of the sound-producing part 11 and the projection of the ear canal opening on the sagittal plane of the human body (for example Figures 12A to 12CThe dashed area 1016 shown can at least partially overlap. The distance between the centroid O of the projection of the sound-emitting part 11 and the centroid P of the projection of the ear canal opening on the sagittal plane of the human body can reflect the relative positional relationship between the sound-emitting part 11 and the ear canal opening, as well as the overlap ratio between the projection area of ​​the sound-emitting part 11 and the projection area of ​​the ear canal opening on the sagittal plane of the human body. This overlap ratio affects the number of leakage structures in the cavity-like structure formed by the sound-emitting part 11 and the user's ear, as well as the size of the opening of the leakage structure. The size of the opening of the leakage structure directly affects the listening quality. Specifically, the larger the opening of the leakage structure, the more sound components directly radiated outward from the sound-emitting part 11, and the less sound reaching the listening position.

[0098] Figure 14A is a schematic diagram of exemplary frequency response curves corresponding to different overlapping ratios of the projected area of ​​the sound-producing part 11 and the projected area of ​​the cavum conchae on the sagittal plane of the human body according to some embodiments of this specification. Figure 14B Schematic diagram of exemplary frequency response curves corresponding to different distances between the centroid of the projection of the sound-producing part 11 and the centroid of the projection of the ear canal opening on the sagittal plane of the human body according to some embodiments of this specification.

[0099] Reference Figure 14A , wherein the abscissa is the overlap ratio between the projection area of ​​the sound-producing part 11 and the projection area of ​​the cavum concha on the sagittal plane of the human body, and the ordinate is the sound pressure level at the ear canal opening corresponding to different overlap ratios. Straight line 1301 represents the linear relationship between the overlap ratio between the area of ​​the first projection and the projection area of ​​the cavum concha on the sagittal plane of the human body and the sound pressure level at the ear canal opening at a frequency of 500 Hz; straight line 1322 represents the linear relationship between the overlap ratio between the area of ​​the first projection and the projection area of ​​the cavum concha on the sagittal plane of the human body and the sound pressure level at the ear canal opening at a frequency of 1 kHz; straight line 1303 represents the linear relationship between the overlap ratio between the area of ​​the first projection and the projection area of ​​the cavum concha on the sagittal plane of the human body and the sound pressure level at the ear canal opening at a frequency of 3 kHz. Figure 14A The hollow circular points in the figure represent the test data corresponding to different overlapping ratios between the area of ​​the first projection and the projection area of ​​the concha cavity on the sagittal plane of the human body at a frequency of 500 Hz; Figure 14A The lighter grayscale dots in the figure represent the test data corresponding to the different overlapping ratios between the area of ​​the first projection and the projection area of ​​the concha cavity on the sagittal plane of the human body at a frequency of 1 kHz. Figure 14A The black circular points in the figure represent the test data corresponding to the different overlapping ratios of the first projection area and the projection area of ​​the concha cavity on the sagittal plane of the human body at a frequency of 3kHz. Figure 14AIt can be seen that at different frequencies, the overlapping ratio of the area of ​​the first projection and the projection area of ​​the cavum concha on the human sagittal plane is approximately positively correlated with the sound pressure level at the user's ear canal opening. When the projection area of ​​the sound-emitting part 11 overlaps with the projection area of ​​the cavum concha on the human sagittal plane, the sound of a specific frequency (for example, 500Hz, 1kHz, 3kHz) measured at the ear canal opening is significantly improved relative to when the projection area of ​​the sound-emitting part 11 and the projection area of ​​the cavum concha on the human sagittal plane do not overlap (the overlapping ratio is 0). Based on this, in order to ensure the acoustic output quality of the sound-emitting part 11, the overlapping ratio of the projection of the sound-emitting part 11 and the projection of the cavum concha on the human sagittal plane can be made between 44.01% and 80%. Combined with Figure 14A When the overlap ratio is 22% or 32%, the sound pressure level of the sound at the ear canal opening is relatively high. However, the structure of the sound-emitting part 11 extending into the concha cavity is limited, and the edge of the concha cavity cannot support and limit the end of the sound-emitting part 11. When the overlap ratio is too large (for example, the overlap ratio is greater than 80%), although the sound pressure level of the sound at the ear canal opening is relatively high, it will affect the opening state of the ear canal opening. Furthermore, in some embodiments, the overlap ratio between the projection of the sound-emitting part 11 and the projection of the concha cavity on the sagittal plane of the human body can be between 45% and 71.49%, so as to take into account the connectivity between the ear canal opening and the external environment and the listening effect.

[0100] Reference Figure 14B , where the horizontal axis is the distance between the centroid O of the projection of the sound-emitting part 11 and the centroid P of the projection of the ear canal opening on the human sagittal plane, and the vertical axis is the sound pressure level at the ear canal opening corresponding to different distances. Line 1304 represents the linear relationship between the distance between the centroid O of the projection of the sound-emitting part 11 and the centroid P of the projection of the ear canal opening on the human sagittal plane and the sound pressure level at the ear canal opening at a frequency of 500 Hz; line 1305 represents the linear relationship between the distance between the centroid O of the projection of the sound-emitting part 11 and the centroid P of the projection of the ear canal opening on the human sagittal plane and the sound pressure level at the ear canal opening at a frequency of 1 kHz; and line 1306 represents the linear relationship between the distance between the centroid O of the projection of the sound-emitting part 11 and the centroid P of the projection of the ear canal opening on the human sagittal plane and the sound pressure level at the ear canal opening at a frequency of 3 kHz. Figure 14B The hollow circular points in the figure represent the test data corresponding to different distances between the centroid O of the projection of the sound-producing part 11 and the centroid P of the projection of the auditory canal opening on the sagittal plane of the human body when the frequency is 500 Hz; Figure 14B The black circular points in the figure represent the test data corresponding to different distances between the centroid O of the projection of the sound-producing part 11 and the centroid P of the projection of the auditory canal opening on the sagittal plane of the human body when the frequency is 1 kHz; Figure 14BThe lighter grayscale dots in the figure represent the test data corresponding to the different distances between the projection centroid O of the sound-producing part 11 and the projection centroid P of the ear canal opening on the sagittal plane of the human body when the frequency is 3kHz. Figure 14B It can be seen that at different frequencies, the distance between the centroid O of the projection of the sound-emitting part 11 and the centroid P of the projection of the ear canal opening on the sagittal plane of the human body is approximately negatively correlated with the sound pressure level at the user's ear canal opening. Overall, the sound pressure level of the sound of a specific frequency (for example, 500 Hz, 1 kHz, 3 kHz) measured at the ear canal opening shows a downward trend as the distance between the centroid O of the projection of the sound-emitting part 11 and the centroid P of the projection of the ear canal opening on the sagittal plane of the human body increases. Here, combined with Figure 14A and Figure 14B , the greater the distance between the centroid O of the projection of the sound-emitting part 11 and the centroid P of the projection of the ear canal opening on the sagittal plane of the human body, the smaller the overlap ratio between the projection area of ​​the sound-emitting part 11 and the projection area of ​​the ear canal opening on the sagittal plane of the human body. This overlap ratio will affect the number of leakage structures of the cavity-like structure formed by the sound-emitting part 11 and the user's ear and the size of the opening of the leakage structure, and the opening size of the leakage structure will directly affect the listening quality. Specifically, the larger the opening of the leakage structure, the more sound components directly radiated outward from the sound-emitting part 11, and the less sound reaching the listening position. In addition, when the distance between the centroid O of the projection of the sound-emitting part 11 and the centroid P of the projection of the ear canal opening on the sagittal plane of the human body is too small, the overlap ratio between the projection area of ​​the sound-emitting part 11 and the projection area of ​​the ear canal opening on the sagittal plane of the human body is too large, and the sound-emitting part 11 may cover the user's ear canal opening, affecting the user's acquisition of sound information in the external environment. According to Figure 14BIt can be seen that, taking a frequency of 3 kHz as an example, when the distance between the centroid O of the projection of the sound-emitting part 11 and the centroid P of the projection of the ear canal opening on the human sagittal plane is 7 mm and 11 mm, the sound pressure levels at the ear canal opening measured are ~72 dB and ~70 dB, respectively. When the distance between the centroid O of the projection of the sound-emitting part 11 and the centroid P of the projection of the ear canal opening on the human sagittal plane is 18 mm and 22 mm, the sound pressure levels at the ear canal opening measured are ~80 dB and ~84.3 dB, respectively. This shows that the distance between the centroid O of the projection of the sound-emitting part 11 and the centroid P of the projection of the ear canal opening on the human sagittal plane should not be too large. In some embodiments, in order to ensure the acoustic output quality of the sound-emitting portion 11 (for example, the sound pressure level at the ear canal opening is greater than 80 dB) while ensuring that the user can receive sound information from the external environment, the distance between the centroid O of the projection of the sound-emitting portion 11 and the centroid Q of the projection of the ear canal opening on the human body's sagittal plane can be 3 mm to 15 mm. Furthermore, the distance between the centroid O of the projection of the sound-emitting portion 11 and the centroid P of the projection of the ear canal opening on the human body's sagittal plane can be 4 mm to 13 mm. Still further, the distance between the centroid O of the projection of the sound-emitting portion 11 and the centroid P of the projection of the ear canal opening on the human body's sagittal plane can be 8 mm to 10 mm to ensure the listening volume at the user's ear canal.

[0101] In some embodiments, the distance between the centroid of the projection of the sound-emitting portion 11 on the human sagittal plane and the centroid of the projection of the ear canal opening on the human sagittal plane is within an appropriate range, which can achieve higher sound production efficiency. On this basis, the size of the transducer or battery can be appropriately reduced, thereby reducing the ratio of the second area to the projected area of ​​the auricle on the human sagittal plane. In some embodiments, the distance between the centroid of the projection of the sound-emitting portion 11 on the human sagittal plane and the centroid of the projection of the ear canal opening on the human sagittal plane is between 4 mm and 13 mm, and the ratio of the second area to the projected area of ​​the auricle on the human sagittal plane is between 0.88 and 1.2. In some embodiments, the distance between the centroid of the projection of the sound-emitting part 11 on the sagittal plane of the human body and the centroid of the projection of the ear canal opening on the sagittal plane of the human body is between 8 mm and 12 mm, and the ratio of the second area to the projection area of ​​the auricle on the sagittal plane of the human body is between 0.8 and 1.1, so as to reduce the sound leakage to the outside from the cavity-like structure formed by the sound-emitting part 11 and the user's ear, so that more sound enters the ear canal to ensure the listening effect.

[0102] It should be noted that the frequency response curves corresponding to different overlapping ratios and the frequency response curves corresponding to the centroid of the first projection and the centroid of the projection of the ear canal opening on the sagittal plane of the human body measured in the embodiments of this specification are measured by changing the wearing position of the sound-emitting part 11 (for example, translating along the sagittal axis) when the wearing angle of the sound-emitting part 11 (the angle between the upper side wall or the lower side wall and the horizontal direction) and the dimensions in the long axis direction, the short axis direction and the thickness direction are constant.

[0103] It should be noted that the positional relationship between the sound-producing part 11 and the auricle, the cavum concha or the opening of the ear canal involved in the embodiments of this specification can be determined by the following exemplary method: first, at a specific position, a photo of a human head model with an ear is taken in the direction facing the sagittal plane of the human body, and the edge of the cavum concha, the outline of the opening of the ear canal and the outline of the auricle (for example, the inner outline and the outer outline) are marked. These marked outlines can be regarded as the projection outlines of various structures of the ear on the sagittal plane of the human body; then, at the specific position, a photo of the earphone 10 is taken on the human head model at the same angle, and the outline of the sound-producing part 11 is marked. The outline can be regarded as the projection of the sound-producing part 11 on the sagittal plane of the human body. The positional relationship between the sound-producing part 11 (for example, the centroid, the end, etc.) and the edge of the cavum concha, the opening of the ear canal, the inner outline or the outer outline can be determined by comparative analysis.

[0104] The foregoing Figures 1 to 14B The corresponding description is about the situation where the whole or part of the sound-emitting part of the earphone is inserted into the concha cavity when the earphone is worn. In some embodiments, the sound-emitting part may not be inserted into the concha cavity. For example, Figure 15 At least part of the sound-producing portion 1201 shown covers the antihelix area. For another example, the sound-producing portion 1201 can be suspended relative to the concha cavity. Figure 15 Taking the earphone 1200 shown in FIG. 1 as an example, the earphone 1200 is described in detail. It should be noted that, without violating the corresponding acoustic principles, Figure 15 The structure of the earphone 1200 and its corresponding parameters can also be applied to the earphone mentioned above in which the sound-producing part extends into the concha cavity.

[0105] By positioning the sound-emitting portion 1201 at least partially near the user's antihelix 105, the output effect of the earphone 1200 can be improved, namely, increasing the sound intensity at the near-field listening position while reducing the volume of far-field sound leakage. When the user wears the earphone 1200, one or more sound outlets can be provided on the side of the housing of the sound-emitting portion 1201 that is close to or facing the user's ear canal, and one or more pressure relief holes can be provided on the other sidewalls of the housing of the sound-emitting portion 1201 (for example, the sidewall that is away from or facing away from the user's ear canal). The sound outlets are acoustically coupled to the front cavity of the earphone 1200, and the pressure relief holes are acoustically coupled to the rear cavity of the earphone 1200. Taking the example of a sound-emitting portion 1201 including a sound outlet and a pressure relief hole, the sound output from the sound outlet and the sound output from the pressure relief hole can be approximately regarded as two sound sources, with the sound of the two sound sources being equal in magnitude and opposite in phase. The sound from the sound hole can be directly transmitted to the user's ear canal without hindrance, while the sound from the pressure relief hole needs to bypass the shell of the sound-emitting part 1201 or pass through the sound-emitting part 1201 to form a similar Figure 16 The acoustic model shown in Figure 16As shown, when a baffle is placed between point sound sources A1 and A2, in the near field, the sound field of point sound source A2 needs to bypass the baffle to interfere with the sound waves of point sound source A1 at the listening position, effectively increasing the sound path from point sound source A2 to the listening position. Therefore, assuming that point sound sources A1 and A2 have the same amplitude, the amplitude difference between the sound waves of point sound sources A1 and A2 at the listening position increases compared to the case without the baffle, thereby reducing the degree of cancellation between the two sounds at the listening position and increasing the volume at the listening position. In the far field, because the sound waves generated by point sound sources A1 and A2 can interfere over a larger spatial range without bypassing the baffle (similar to the case without the baffle), far-field sound leakage is not significantly increased compared to the case without the baffle. Therefore, placing a baffle structure around either point sound source A1 or point sound source A2 can significantly increase the volume at the near-field listening position without significantly increasing the far-field sound leakage.

[0106] like Figure 17 As shown, the ear hook 1202 and the sound-emitting portion 1201 form a fifth projection on the first plane, and the fifth projection includes an outer contour, a first end contour, an inner contour, and a second end contour. Figure 3 The structure of the middle earphone 10 is similar. The first end contour in the fifth projection can be the projection contour of the end FE of the sound-emitting part 1201 on the first plane, and the two endpoints P0 and P1 of the first end contour are the projection points of the intersection of the end FE and other parts of the sound-emitting part 1201 on the first plane. The second end contour can be the projection contour of the free end BE of the suspension structure 1202 on the first plane, and the two endpoints Q0 and Q1 of the second end contour are the projection points of the intersection of the free end BE and other parts of the suspension structure 12 on the first plane. The outer contour can be the contour of the first projection between point P1 and point Q1. The inner contour can be the contour of the fifth projection between point P0 and point Q0. For the division of the end FE and the free end BE of the suspension structure 1202, please refer to the relevant description of the earphone 10 (such as the description in this specification). Figure 3 and Figure 5 Related description).

[0107] For example, if the projection of the sound-emitting portion 1201 on a first plane is rectangular (e.g., runway-shaped), the projection of the sound-emitting portion 1201 includes parallel or nearly parallel upper and lower sidewall projections, as well as a first end contour connecting the upper and lower sidewall projections. The first end contour can be a straight line segment or a circular arc, with points P0 and P1 representing the two ends of the first end contour, respectively. By way of example only, point P0 can be the intersection of the arc formed by the projection of the free end of the sound-emitting portion 1201 and the line segment of the projection of the upper sidewall. Similarly, point P1 can be the intersection of the arc formed by the projection of the free end of the sound-emitting portion 1201 and the line segment of the projection of the lower sidewall. Similarly, the ear hook 1202, facing away from the sound-emitting portion 1201, also has a free end. The projection of the free end of the ear hook 1202 on the first plane forms a second end contour, which can be a straight line segment or a circular arc. Points Q0 and Q1 represent the two ends of the second end contour, respectively. In some embodiments, point Q0 and point Q1 can be the two end points of a line segment or arc projected from the free end of the first part of the ear hook 1202 in the direction away from the second part of the ear hook on the first plane. Furthermore, in the long axis direction Y of the sound-emitting part 1201, the endpoint close to the sound-emitting part 1201 is point Q0, and the endpoint away from the sound-emitting part 1201 is Q1.

[0108] like Figure 15 As shown, the projections of the earphone 1200 on the first plane and the sagittal plane of the human body can reflect how the earphone 1200 fits on the ear. For example, the area of ​​the first projection can reflect the area of ​​the auricle covered by the earphone 1200 when worn, as well as the contact between the sound-emitting portion 1201 and the earhook 1202 and the ear. In some embodiments, because the sound-emitting portion 1201 and the first portion of the earhook 1202 do not contact each other, the inner contour, outer contour, first end contour, and second end contour in the first projection form a non-enclosed area. The size of this area is closely related to the wearing experience of the earphone 1200 (e.g., wearing stability, sound emission location, etc.). For ease of understanding, in some embodiments, a tangent segment 1250 connecting the first end contour and the second end contour can be determined, and the area enclosed by a fifth closed curve defined by the tangent segment 1250, the outer contour, the first end contour, and the second end contour is used as the area of ​​the fifth projection (also referred to as the "fifth area").

[0109] In some embodiments, the headset 1200 and Figure 5 The differences of the earphone 10 shown include: the sound-emitting portion 1201 of the earphone 1200 is located at the user's antihelix 105 when worn, so the range of the fifth area is smaller than the first area. In some embodiments, the fifth area can be 0.2 to 0.6 times the first area. In some embodiments, the fifth area can be 0.3 to 0.5 times the first area. The range of the fifth area of ​​the fifth closed curve can be 250 mm. 2~1000mm 2 To ensure the sound efficiency of the sound-emitting portion 1201 and the appropriate clamping force, and to avoid the foreign body sensation of the earphone 1200 when worn, the fifth area of ​​the fifth closed curve is within the range of 400mm. 2 ~800mm 2 between.

[0110] In some embodiments, to ensure that the sound-emitting portion 1201 is close to the anti-helix when the user wears the earphones 1200, while also reducing the user's wearing load and facilitating the user's ability to capture ambient sound or conduct daily conversations during daily wear, in some embodiments, when the earphones 1200 are not worn, the ratio of the projected area of ​​the sound-emitting portion 1201 on the human sagittal plane to the fifth area is between 0.3 and 0.85. In some embodiments, the ratio of the projected area of ​​the sound-emitting portion 1201 on the human sagittal plane to the fifth area is between 0.4 and 0.75.

[0111] In the wearing mode where the sound-emitting portion 1201 at least partially covers the user's antihelix, since the sound-emitting portion 1201 does not extend into the user's concha cavity, the angle between the sound-emitting portion 1201 and the sagittal plane of the human body is smaller than that of the Figure 3 The wearing mode in which at least part of the sound-emitting portion 11 of the earphone shown in FIG. 1 extends into the concha cavity is slightly smaller. Therefore, in the wearing mode in which at least part of the sound-emitting portion 1201 covers the antihelix area of ​​the user, Figure 15 The projected area of ​​the sound-emitting portion 1201 on the human body sagittal plane of the earphone shown is slightly larger than the projected area of ​​the sound-emitting portion 11 on the human body sagittal plane when the earphone is worn in a manner that at least partially extends into the concha cavity. For example, in some embodiments, the projected area of ​​the sound-emitting portion 1201 on the human body sagittal plane when the earphone is worn may be 236 mm. 2 ~565mm 2 In some embodiments, in order to avoid the projection area of ​​the sound-emitting part 1201 being too small, which would result in a poor baffle effect, and to avoid the projection area of ​​the sound-emitting part 1201 being too large, which would cover the ear canal opening and affect the user's ability to obtain the sound of the external environment, the projection area of ​​the sound-emitting part 1201 on the sagittal plane of the human body can be between 250mm when worn. 2 ~550mm 2 In some embodiments, the projection area of ​​the sound-producing part 1201 on the sagittal plane of the human body can be 320mm 2 ~410mm 2 .

[0112] Also refer to Figure 3 and Figure 15In some embodiments, the projection area of ​​the sound-emitting portion 1201 on the first plane is slightly larger than the projection area of ​​the sound-emitting portion 11 of the earphone 10 on the sagittal plane of the human body, and the projection area of ​​the earphone 1200 on the first plane is slightly larger than the projection area of ​​the earphone 10 on the first plane. In some embodiments, the projection area of ​​the earphone 1200 on the first plane is within a range of 550mm 2 ~1220mm 2 Furthermore, the projection area of ​​the earphone 1200 on the first plane is within the range of 650mm. 2 ~1050mm 2 To ensure the wearing comfort of earphones 1200.

[0113] In some embodiments, when the sound-emitting portion 1201 is worn in a manner that at least a portion of the user's anti-auricular helix is ​​covered, the sound-emitting portion 1201 can be smaller in size and can also provide a higher listening volume at the listening position. At the same time, in order to avoid the projected area of ​​the sound-emitting portion 1201 being too small, which would result in a small baffle effect, in the non-wearing state, the ratio of the projected area of ​​the sound-emitting portion 1201 on the first plane to the projected area of ​​the earphone 1200 on the first plane is between 0.33 and 0.69. In some embodiments, the projected area of ​​the sound-emitting portion 1201 on the first plane can be between 250mm 2 ~550mm 2 and the ratio of the projection area of ​​the sound-emitting portion 1201 on the first plane to the projection area of ​​the earphone 1200 on the first plane is between 0.4 and 0.65. In some embodiments, the projection area of ​​the sound-emitting portion 1201 on the first plane can be 320mm 2 ~410mm 2 , and the ratio of the projected area of ​​the sound-emitting part 1201 on the first plane to the projected area of ​​the earphone 1200 on the first plane is between 0.44 and 0.62, so as to improve the sound efficiency of the sound-emitting part.

[0114] Taking into account the differences in ear shapes and sizes of different users, the wearing effect of the earphones can be effectively improved by designing the relative size between the projection area of ​​the sound-emitting part 1201 and the projection area of ​​the auricle on the sagittal plane of the human body. In some embodiments, when the earphones are not worn, the ratio of the projection area of ​​the sound-emitting part 1201 on the first plane to the projection area of ​​the auricle on the sagittal plane of the human body is between 0.17 and 0.35. It should be noted that this ratio is based on the average range of the projection area of ​​the auricle on the sagittal plane of the human body as a reference, and the average range is 1300mm. 2 ~1700mm 2 For some users, the projection area of ​​the auricle on the sagittal plane may be less than 1300mm due to individual differences.2 or greater than 1700mm 2 In this case, the ratio of the projection area of ​​the sound-emitting part 1201 on the first plane to the projection area of ​​the auricle on the sagittal plane of the human body may be greater than 0.35 or less than 0.17. For example, the ratio of the projection area of ​​the sound-emitting part 1201 on the first plane to the projection area of ​​the auricle on the sagittal plane of the human body is between 0.12 and 0.39.

[0115] Figure 17 This is the morphological difference between the earphone 1200 in the worn and unworn states, as described in some embodiments of this specification. The dashed area represents the first portion of the earhook in the worn state, which is farther from the free end of the sound-emitting portion 1201 than in the unworn state. In the worn state, the earhook 1202 and the sound-emitting portion 1201 form a sixth projection on the sagittal plane. Similar to the fifth projection shown in the figure, the sixth projection also includes an outer contour, a first end contour, an inner contour, and a second end contour. The outer contour, the first end contour, the second end contour, and the tangent segment 1250 connecting the first and second end contours collectively define a second closed curve. As described above, the projection of the earphone 1200 on the first plane is similar to the projection of the earphone 1200 on the sagittal plane. Therefore, in the sixth projection, the contour boundary points in the unworn state, namely points P0, P1, Q0, and Q1, can still be used to describe the divisions of the contours in the second projection. In other words, the definitions of the outer contour, first end contour, inner contour, second end contour, and tangent segment 1250 in the sixth projection are similar to those for the fifth contour and are not further described here. The area enclosed by the sixth closed curve is considered the area of ​​the sixth projection (also referred to as the "sixth area"). In some embodiments, the sixth area can reflect the fit of the earphone 1200 against the user's ear when worn.

[0116] If the ratio of the fifth area to the sixth area is too large, the clamping force of the user's auricle may be too small, which may lead to unstable wearing. If the ratio of the fifth area to the sixth area is too small, the elasticity of the ear hook may be poor, which may make it inconvenient for the user to wear and cause a foreign body sensation in the ear after wearing. Therefore, in some embodiments, in order to ensure the appropriate elasticity of the ear hook 1202, the ratio of the fifth area to the sixth area is between 0.6 and 0.98. In some embodiments, since the sound-emitting portion 1201 and the ear hook 1202 do not need to be as Figure 5 The earphone 10 shown is clamped on the auricle, so in some embodiments, the ratio of the fifth area to the sixth area ranges from 0.75 to 0.95.

[0117] Based on similar reasons as the fifth area, an appropriate sixth area can ensure the listening volume of the earphone 1200 at the listening position (e.g., at the anti-helix) while maintaining a good far-field sound leakage cancellation effect. In some embodiments, the sixth area is within the range of 400mm 2 ~1100mm 2 In some embodiments, considering the elasticity of the ear hook 1202, the sixth area ranges from 500mm to 2 ~900mm 2 between.

[0118] In some embodiments, based on the relationship between the fifth and sixth areas, the ratio of the projected area of ​​the sound-emitting portion 1201 on the first plane to the sixth area of ​​the sixth closed curve is slightly smaller than the ratio of the projected area of ​​the sound-emitting portion 1201 on the first plane to the fifth area of ​​the fifth closed curve. Thus, the ratio of the projected area of ​​the sound-emitting portion 1201 on the first plane to the sixth area is between 0.35 and 0.75. To ensure a good listening experience, the ratio of the projected area of ​​the sound-emitting portion 1201 to the sixth area is between 0.38 and 0.66.

[0119] Figure 18 This is a diagram of exemplary frequency response curves corresponding to different overlapping ratios of the projection of the sound-emitting portion 1201 on the human body sagittal plane and the projection of the cavum concha on the human body sagittal plane, according to some embodiments of this specification, when the sound-emitting portion 1201 at least partially covers the antihelix area. Figure 18 In the figure, the horizontal axis represents the frequency (unit: Hz), and the vertical axis represents the sound pressure level (unit: dB) measured at the ear canal opening at different frequencies. Figure 18 It can be seen that in a specific experiment, since the three-dimensional structure and overall size of the sound-emitting part 1201 are certain, in order to ensure that the projection area of ​​the sound-emitting part 1201 is a constant value, the experimental values ​​of different coverage ratios are obtained by translation along the sagittal axis and / or the vertical axis. The position of the sound-emitting part 1201 relative to the antihelix area will change by translation, and correspondingly, the effect of the baffle formed by the sound-emitting part 1201 and the antihelix area will be weakened. In the worn state, the sound hole is usually set on the side wall of the sound-emitting part 1201 close to or facing the ear canal opening. At this time, if the overlap ratio of the projection area of ​​the sound-emitting part 1201 on the human body sagittal plane and the projection area of ​​the concha cavity on the human body sagittal plane is larger, it means that the sound hole of the sound-emitting part 1201 will usually be closer to the ear canal opening. Therefore, even if the baffle effect of the antihelix area and the sound-emitting part 1201 is weakened, the listening volume at the ear canal opening can also be improved. Continue to refer to Figure 18When the overlap ratio between the projected area of ​​the sound-emitting portion 1201 on the human sagittal plane and the projected area of ​​the cavum concha on the human sagittal plane is no less than 11.82%, the listening volume at the ear canal opening is significantly improved compared to when the overlap ratio is less than 11.82%. This means that the sound-emitting portion 1201 can produce a better frequency response even when it covers part of the cavum concha and the antihelix. Based on this, in some embodiments, to improve the user's listening experience when wearing headphones, the projected area of ​​the sound-emitting portion 1201 on the human sagittal plane, while covering the antihelix, must also meet the requirement that the overlap ratio between the projected area of ​​the sound-emitting portion 1201 on the human sagittal plane and the projected area of ​​the user's cavum concha on the same sagittal plane is no less than 11.82%. Furthermore, in some embodiments, the overlap ratio between the projected area of ​​the sound-emitting portion 1201 on the human sagittal plane and the projected area of ​​the user's cavum concha on the same sagittal plane can be no less than 31.83%. Considering that the overlap ratio between the projected area of ​​the sound-emitting portion 1201 on the human body's sagittal plane and the projected area of ​​the cavum concha on the human body's sagittal plane is too large, the sound-emitting portion 1201 will cover the ear canal opening, preventing the ear canal opening from remaining fully open, affecting the user's ability to obtain sounds from the external environment. Furthermore, in some embodiments, the overlap ratio between the projected area of ​​the sound-emitting portion 1201 on the human body's sagittal plane and the projected area of ​​the user's cavum concha on the human body's sagittal plane can be 11.82% to 62.50%. Furthermore, in some embodiments, the overlap ratio between the projected area of ​​the sound-emitting portion 1201 on the human body's sagittal plane and the projected area of ​​the user's cavum concha on the human body's sagittal plane can be 31.83% to 50.07%. Even further, the overlap ratio between the projected area of ​​the sound-emitting portion 1201 on the human body's sagittal plane and the projected area of ​​the user's cavum concha on the human body's sagittal plane can be 35.55% to 45%. It should be noted that, with respect to the frequency response curve corresponding to the overlapping ratio of the projection area of ​​the sound-emitting part 1201 on the sagittal plane of the human body and the projection area of ​​the user's cavum concha on the sagittal plane of the human body in the embodiment of this specification, the wearing angle of the sound-emitting part 1201 (the angle between the upper side wall or the lower side wall and the horizontal direction, for example, the angle between the upper side wall and the horizontal direction is 0°) and the size of the sound-emitting part 1201 are constant, and the wearing position of the sound-emitting part 1201 is changed (for example, translation along the sagittal axis or the vertical axis).

[0120] In some embodiments, increasing the overlap ratio between the projected area of ​​the sound-emitting portion 1201 on the human sagittal plane and the projected area of ​​the user's cavum concha on the human sagittal plane can achieve higher sound production efficiency. On this basis, the size of the transducer or battery can be appropriately reduced, thereby reducing the ratio of the sixth area to the projected area of ​​the auricle on the human sagittal plane. In some embodiments, to ensure that the earphone 10 has a wearing style that at least partially covers the antihelix and that the sound-emitting portion 1201 has high sound production efficiency and wearing comfort, the ratio of the projected area of ​​the sound-emitting portion 1201 on the first plane to the sixth area can be between 0.35 and 0.75. Furthermore, to ensure the wearing comfort of the earphone 1200, the ratio of the projected area of ​​the sound-emitting portion 1201 on the first plane to the sixth area can be between 0.35 and 0.62.

[0121] In some embodiments, the ratio of the overlapping area between the projection of the sound-producing part 1201 on the sagittal plane and the projection of the cavum concha on the sagittal plane to the projected area of ​​the sound-producing part 1201 on the sagittal plane can reflect the overall position of the sound-producing part 1201 relative to the cavum concha, and is therefore related to the sound production efficiency of the sound-producing part 1201. In some embodiments, to ensure stability and comfort while wearing the earphones without blocking the user's ear canal and to achieve good sound production efficiency, the ratio of the overlapping area between the projection of the sound-producing part 1201 on the sagittal plane and the projection of the cavum concha on the sagittal plane to the projected area of ​​the sound-producing part 1201 on the sagittal plane is no less than 10.6%. In some embodiments, to further enhance earphone comfort, the ratio of the overlapping area between the projection of the sound-producing part 1201 on the sagittal plane and the projection of the cavum concha on the sagittal plane to the projected area of ​​the sound-producing part 1201 on the sagittal plane is no less than 11.18%. Furthermore, when the size of the transducer or battery is appropriately reduced, the ratio of the sixth area to the projection area of ​​the auricle on the sagittal plane of the human body is between 0.3 and 0.5, and the ratio of the overlapping area of ​​the projection area of ​​the sound-emitting part 1201 on the sagittal plane of the human body and the projection area of ​​the concha cavity on the sagittal plane of the human body to the projection area of ​​the sound-emitting part 1201 on the sagittal plane of the human body is not less than 13.68%, so as to ensure that the sound-emitting part at least partially covers the listening effect when wearing it in the antihelix mode.

[0122] Figures 19A to 19E Schematic diagram of wearing an earphone according to other embodiments of this specification. Figure 19A 、 Figure 19D and Figure 19EIn some embodiments, the projection of the end FE of the sound-producing part 1201 on the human sagittal plane may be located in the region between the projection of the inner contour 1014 of the auricle on the human sagittal plane and the projection of the edge of the cavum concha 102 on the human sagittal plane. In other words, the midpoint of the projection of the end FE of the sound-producing part 1201 on the human sagittal plane is located between the projection of the inner contour 1014 of the auricle on the human sagittal plane and the projection of the edge of the cavum concha 102 on the human sagittal plane. Figure 19D As shown, in some embodiments, the end FE of the sound-emitting portion 1201 may abut against the edge of the cavum concha 102, the fixed end of the sound-emitting portion 1201 may be located in front of the tragus, and at least part of the sound-emitting portion 1201 may cover the cavum concha 102 of the user. Figure 19E As shown, in some embodiments, the midpoint of the projection of the end FE of the sound-emitting part 1201 on the sagittal plane of the human body can be located within the projection area of ​​the concha 102 on the sagittal plane of the human body, and the projection of the fixed end of the sound-emitting part 1201 on the sagittal plane of the human body can be located outside the projection area of ​​the user's auricle on the sagittal plane of the human body.

[0123] Reference Figure 19B and Figure 19C In some embodiments, the upper side wall 111 or the lower side wall 112 of the sound emitting portion 1201 may also be inclined at a certain angle relative to the horizontal plane when worn. Figure 19B As shown, in some embodiments, the end FE of the sound-emitting portion 1201 can be tilted toward the top of the auricle relative to the fixed end of the sound-emitting portion 1201, and the end FE of the sound-emitting portion 1201 can be against the inner contour 1014 of the auricle. Figure 19C As shown, in some embodiments, the fixed end of the sound-producing part 1201 can be tilted toward the area of ​​the top of the auricle relative to the end FE of the sound-producing part 1201, and the end FE of the sound-producing part 1201 can be located between the edge of the cavum concha 102 and the inner contour 1014 of the auricle, that is, the midpoint C3 of the projection of the end FE of the sound-producing part 1201 on the sagittal plane of the human body is located between the projection of the inner contour 1014 of the auricle on the sagittal plane of the human body and the projection of the edge of the cavum concha 102 on the sagittal plane of the human body.

[0124] It is understandable that when worn by a user, if the distance between the midpoint C3 of the projection of the end FE of the sound-emitting portion 1201 on the human sagittal plane and the projection of the inner contour 1014 of the auricle on the human sagittal plane is too large, the end FE of the sound-emitting portion 1201 will not be able to rest against the inner contour 1014 of the auricle, which will result in the sound-emitting portion 1201 being unable to function as a limiter and being prone to falling off. In addition, if the distance between the centroid O of the first projection and a point in a certain area of ​​the boundary of the second projection is too large, there may be a gap between the end FE of the sound-emitting portion 1201 and the inner contour 1014 of the auricle. The sound emitted by the sound outlet and the sound emitted by the pressure relief hole will be acoustically short-circuited in the area between the end FE of the sound-emitting portion 1201 and the inner contour 1014 of the auricle, resulting in a decrease in the listening volume at the user's ear canal opening. The larger the area between the end FE of the sound-emitting portion 1201 and the inner contour 1014 of the auricle, the more obvious the acoustic short-circuit phenomenon. It should be noted that the inner contour 1014 of the auricle may refer to the inner wall of the helix, and correspondingly, the outer contour of the auricle may refer to the outer wall of the helix. In some embodiments, in order to make the earphone have better wearing stability, the distance between the midpoint C3 of the projection of the end FE of the sound-emitting part 1201 on the sagittal plane of the human body and the projection of the inner contour 1014 of the auricle on the sagittal plane of the human body may be no more than 8 mm. Furthermore, the distance between the midpoint C3 of the projection of the end FE of the sound-emitting part 1201 on the sagittal plane of the human body and the projection of the inner contour 1014 of the auricle on the sagittal plane of the human body may be 0 mm to 6 mm. Furthermore, the distance between the midpoint C3 of the projection of the end FE of the sound-emitting part 1201 on the sagittal plane of the human body and the projection of the inner contour 1014 of the auricle on the sagittal plane of the human body may be 0 mm to 5.5 mm. In some embodiments, the distance between the midpoint C3 of the projection of the distal end FE of the sound-emitting portion 1201 on the sagittal plane and the projection of the inner contour 1014 of the auricle on the sagittal plane can be 0. When this distance is 0, it indicates that the distal end FE of the sound-emitting portion 1201 abuts against the inner contour 1014 of the auricle. In this case, the sound-emitting portion 1201 abuts against the inner contour 1014 of the auricle when worn, thereby improving the stability of the earphone when worn. In addition, the area between the distal end FE of the sound-emitting portion 1201 and the inner contour 1014 of the auricle can be minimized to reduce the acoustic short-circuit area around the sound-emitting portion 1201, thereby improving the listening volume at the user's ear canal opening. It should be noted that in a specific scenario, other points other than the midpoint C3 of the projection of the end FE of the sound-emitting part 1201 on the human sagittal plane may abut against the edge of the inner contour 1014 of the auricle. In this case, the distance between the midpoint C3 of the projection of the end FE of the sound-emitting part 1201 on the human sagittal plane and the projection of the inner contour 1014 of the auricle on the human sagittal plane may be greater than 0 mm. In some embodiments, the distance between the midpoint C3 of the projection of the end FE of the sound-emitting part 1201 on the human sagittal plane and the projection of the inner contour 1014 of the auricle on the human sagittal plane may be 2 mm to 10 mm.Furthermore, the distance between the midpoint C3 of the projection of the end FE of the sound-producing part 1201 on the sagittal plane of the human body and the projection of the inner contour 1014 of the auricle on the sagittal plane of the human body may be 4 mm to 8 mm.

[0125] It should also be noted that, in this specification, the terminal end FE of the sound-emitting portion 1201 refers to the end of the sound-emitting portion 1201 away from the connection between the sound-emitting portion 1201 and the ear hook. When the projection of the terminal end FE of the sound-emitting portion 1201 on the human sagittal plane is a curve or a broken line, the midpoint C3 of the projection of the terminal end FE of the sound-emitting portion 1201 on the human sagittal plane can be selected using the following exemplary method: the starting and ending points of the projection of the terminal end FE on the human sagittal plane can be selected to form a line segment, the midpoint of the line segment can be selected as the perpendicular midpoint, and the point where the perpendicular midpoint intersects the projection is the midpoint C3 of the projection of the terminal end of the sound-emitting portion 1201 on the human sagittal plane. In some embodiments, when the terminal end FE of the sound-emitting portion 1201 is a curved surface, the tangent point of the tangent line parallel to the short axis direction Z on its projection can also be selected as the midpoint of the projection of the terminal end FE of the sound-emitting portion 1201 on the human sagittal plane.

[0126] In addition, in some embodiments of the present specification, the distance between the midpoint of the projection of the end FE of the sound-producing part 1201 on the human sagittal plane and the projection of the inner contour 1014 of the auricle on the human sagittal plane may refer to the minimum distance between the projection of the end FE of the sound-producing part 1201 on the human sagittal plane and the projection area of ​​the inner contour 1014 of the auricle on the human sagittal plane. Alternatively, the distance between the midpoint C3 of the projection of the end FE of the sound-producing part 1201 on the human sagittal plane and the projection of the inner contour 1014 of the auricle on the human sagittal plane may refer to the distance between the midpoint C3 of the projection of the end FE of the sound-producing part 1201 on the human sagittal plane and the projection of the inner contour 1014 of the auricle on the human sagittal plane on the sagittal axis.

[0127] The length of the baffle formed by the sound-producing part 1201 and the antihelix area is related to the distance range between the end FE of the sound-producing part 1201 and the midpoint C3 of the projection on the human sagittal plane and the projection of the inner contour 1014 of the auricle on the human sagittal plane. For example, the smaller the distance between the end FE of the sound-producing part 1201 and the midpoint C3 of the projection on the human sagittal plane and the projection of the inner contour 1014 of the auricle on the human sagittal plane, the longer the length of the baffle formed by the sound-producing part 1201 and the antihelix area, the greater the sound path difference between the sound outlet and the pressure relief hole to the external auditory canal 101, and the greater the sound intensity received at the external auditory canal 101.

[0128] In some embodiments, the shape of the sound-emitting portion 1201 can be a regular shape such as a cuboid, a cuboid-like shape (eg, a racetrack shape), a cylinder, or other irregular shapes. Figure 19A 、 Figure 19D and Figure 19EIn some embodiments, when the sound-emitting portion 1201 is a rectangular parallelepiped structure, the upper side wall 111 or the lower side wall 112 of the sound-emitting portion 1201 can be parallel or approximately parallel to the horizontal direction when worn. In this case, the distance between the midpoint C3 of the projection of the end FE of the sound-emitting portion 1201 on the sagittal plane of the human body and the projection of the inner contour 1014 of the auricle on the sagittal plane of the human body is in the range of 0 mm to 18 mm. For example, when using Figure 19A When the wearing method shown in FIG. 1 is used, the distance between the midpoint C3 of the projection of the end FE of the sound-producing part 1201 on the human body sagittal plane and the projection of the inner contour 1014 of the auricle on the human body sagittal plane can be 0 mm to 11 mm; when the wearing method shown in FIG. Figure 19D When the wearing method shown in FIG. 1 is used, the distance between the midpoint C3 of the projection of the end FE of the sound-producing part 1201 on the human body sagittal plane and the projection of the inner contour 1014 of the auricle on the human body sagittal plane can be 3 mm to 12 mm; Figure 19E In the wearing configuration shown, the distance between the midpoint C3 of the projection of the distal end FE of the sound-emitting portion 1201 on the human sagittal plane and the projection of the inner contour 1014 of the auricle on the human sagittal plane can be 8 mm to 12 mm. In some embodiments, when the earphones are worn, the distal end FE of the sound-emitting portion 1201 can rest against the inner contour 1014 of the auricle, while the earhook fits against the back of the user's ear. This allows the sound-emitting portion 1201 and the earhook to cooperate and clamp the user's ear from both the front and back, increasing resistance to prevent the earphone 10 from falling off the ear and improving the wearing stability of the earphone 10.

[0129] Continue to refer to Figure 19B and Figure 19C In some embodiments, the upper side wall 111 or the lower side wall 112 of the sound-emitting portion 1201 may be tilted at a certain angle relative to the horizontal plane. However, if the tilt angle of the upper side wall 111 or the lower side wall 112 of the sound-emitting portion 1201 is too large relative to the horizontal plane, the sound-emitting portion 1201 may extend beyond the user's auricle, causing discomfort and instability in wearing. Therefore, in order to ensure that the sound-emitting portion 1201 covers the area of ​​the antihelix, so that the ear canal opening has good sound intensity, and at the same time ensure that the earphone has good wearing stability and comfort, when using the following method: Figure 19B and Figure 19C When worn in the manner shown, the distance between the midpoint C3 of the projection of the end FE of the sound-producing part 1201 on the sagittal plane of the human body and the projection of the inner contour 1014 of the auricle on the sagittal plane of the human body is in the range of 0 mm to 15 mm.

[0130] It should be noted that Figure 15 The sound-emitting portion 1201 of the earphone shown may not cover the antihelix area, for example Figure 19EIn the wearing position shown, the sound-emitting part 1201 does not extend into the concha cavity, but is suspended relative to the concha cavity of the user, facing the side wall outside the user's ear, that is, the sound-emitting part 1201 itself acts as a baffle. The greater the overlap ratio between the projection area of ​​the sound-emitting part 1201 and the projection area of ​​the concha cavity on the sagittal plane of the human body, the closer the sound outlet of the sound-emitting part 1201 is to the ear canal opening, and the louder the sound volume at the ear canal opening of the user will be. Here, the distance between the projection of the end of the sound-emitting part 1201 on the sagittal plane of the human body and the projection of the edge of the concha cavity on the sagittal plane of the human body is positively correlated with the overlap ratio between the projection area of ​​the sound-emitting part 1201 and the projection area of ​​the concha cavity on the sagittal plane of the human body. Furthermore, the position of the sound outlet of the sound-emitting part 1201 relative to the ear canal opening is positively correlated with the distance between the projection of the end of the sound-emitting part 1201 on the sagittal plane of the human body and the projection of the edge of the concha cavity on the sagittal plane of the human body. The following is combined with Figure 20 Provide specific instructions.

[0131] Figure 20 Shown Figure 19E Schematic diagram of exemplary frequency response curves corresponding to different distances between the projection of the end of the middle sounding part 1201 on the human sagittal plane and the projection of the edge of the concha cavity on the human sagittal plane. Figure 20 , where the horizontal axis represents frequency (unit: Hz), the vertical axis represents the sound pressure level at the ear canal opening at different frequencies (unit: dB), curve 1801 is the frequency response curve when the distance between the projection of the end of the sound-producing part 1201 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane is 0, curve 1802 is the frequency response curve when the distance between the projection of the end of the sound-producing part 1201 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane is 3.72 mm, and curve 1803 is the frequency response curve when the distance between the projection of the end of the sound-producing part 1201 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane is 10.34 mm. According to Figure 20It can be seen that the frequency response when the distance between the projection of the end of the sound-emitting part 1201 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane is 0 mm and 3.72 mm is better than the frequency response when it is 10.34 mm. Based on this, in some embodiments, in order to ensure that the earphone 10 has a better listening effect, the distance between the projection of the end FE of the sound-emitting part 1201 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane can be no more than 10.34 mm. Furthermore, the distance between the projection of the end FE of the sound-emitting part 1201 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane can be 0 mm to 7 mm. More specifically, the distance between the projection of the end FE of the sound-emitting part 1201 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane can be 0 mm to 5 mm. Furthermore, the distance between the projection of the end FE of the sound-emitting part 1201 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane can be 0mm to 3.72mm. It should be noted that in a specific scenario, other points other than the midpoint C3 of the projection of the end FE of the sound-emitting part 1201 on the human sagittal plane can be against the edge of the cavum concha. In this case, the distance between the midpoint C3 of the projection of the end FE of the sound-emitting part 1201 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane can be greater than 0mm. In some embodiments, the distance between the midpoint C3 of the projection of the end FE of the sound-emitting part 1201 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane can be 2mm to 7mm. Furthermore, the distance between the midpoint C3 of the projection of the end FE of the sound-emitting part 1201 on the human sagittal plane and the projection of the edge of the cavum concha on the human sagittal plane can be 2mm to 3.74mm. It should be noted that the frequency response curves corresponding to different distances between the end FE of the sound-emitting part 1201 and the midpoint of the projection on the sagittal plane of the human body and the projection of the edge of the concha on the sagittal plane of the human body measured in the embodiments of this specification are measured by changing the wearing position of the sound-emitting part 1201 (for example, translating along the sagittal axis) when the wearing angle of the sound-emitting part 1201 (the angle between the upper side wall or the lower side wall and the horizontal direction, for example, the angle between the upper side wall and the horizontal direction is 0°), and the dimensions in the long axis direction, the short axis direction and the thickness direction are constant.

[0132] In some embodiments, the distance between the projection of the end of the sound-emitting portion 1201 and the projection of the edge of the cavum concha is within a suitable range, which can achieve higher sound production efficiency. Based on this, the size of the transducer or battery can be appropriately reduced, thereby reducing the ratio of the sixth area to the projected area of ​​the auricle on the human sagittal plane. In some embodiments, the distance between the projection of the end of the sound-emitting portion 1201 and the projection of the edge of the cavum concha is no greater than 8 mm, and the ratio of the sixth area to the projected area of ​​the auricle on the human sagittal plane is between 0.3 and 0.5. Furthermore, to ensure that the sound-emitting portion 1201 forms a more ideal cavity-like structure with the cavum concha, the distance between the projection of the end of the sound-emitting portion 1201 and the projection of the edge of the cavum concha can be set to 0 mm to 5.5 mm, and the ratio of the sixth area to the projected area of ​​the auricle on the human sagittal plane can be set to between 0.35 and 0.46, to ensure that the sound-emitting portion at least partially covers the hearing effect when worn in the antihelix configuration.

[0133] Continue to refer to Figures 19A to 19C , when the dimensions of the sound-emitting part 1201 and the user's auricle are constant and the inclination angle of the sound-emitting part 1201 relative to the horizontal direction is constant when worn, the centroid O of the first projection of the sound-emitting part 1201 on the sagittal plane of the human body and the ear canal opening (for example Figures 19A to 19E The distance between the centroid Q of the projection of the first projection of the sound-producing part 1201 on the human sagittal plane (shown as the dotted area 1016) on the human sagittal plane affects the baffle effect formed by the sound-producing part 1201 and the antihelix region, as well as the position of the sound outlet of the sound-producing part 1201 relative to the ear canal opening, ultimately affecting the sound intensity at the ear canal opening. For example, the smaller the distance between the centroid O of the first projection of the sound-producing part 1201 on the human sagittal plane and the centroid Q of the projection of the ear canal opening on the human sagittal plane, the smaller the contact area between the sound-producing part 1201 and the antihelix region, and the weaker the baffle effect formed by the sound-producing part 1201 and the antihelix region. However, at this time, the increased overlap ratio between the first projection area of ​​the sound-producing part 1201 on the human sagittal plane and the projection area of ​​the cavum concha on the human sagittal plane means that the sound outlet of the sound-producing part 1201 will be closer to the ear canal opening, which can also improve the listening experience at the ear canal opening. Therefore, under the premise that the overall volume and wearing method of the sound-emitting part 1201 are certain, the distance between the centroid O of the first projection of the sound-emitting part 1201 on the sagittal plane of the human body and the centroid Q of the projection of the ear canal opening on the sagittal plane of the human body also needs to be considered.

[0134] Figure 21A 1 is a schematic diagram of exemplary frequency response curves corresponding to different overlapping ratios between the projection area of ​​the sound-emitting portion 1201 and the projection area of ​​the concha cavity on the sagittal plane of the human body in a wearing scenario where the sound-emitting portion 1201 does not extend into the concha cavity as shown in other embodiments of this specification. Figure 21BThis is a schematic diagram of exemplary frequency response curves corresponding to different distances between the centroid of the projection of the sound-emitting part 1201 and the centroid of the projection of the ear canal opening on the sagittal plane of the human body in a wearing scenario when the sound-emitting part 1201 does not extend into the concha cavity as shown in other embodiments of this specification.

[0135] Reference Figure 21A , wherein the abscissa is the overlap ratio between the projection area of ​​the sound-producing part 1201 and the projection area of ​​the cavum concha on the human sagittal plane, and the ordinate is the sound pressure level at the ear canal opening corresponding to different overlap ratios. A straight line 1601 represents the simulated linear relationship between the overlap ratio between the area of ​​the first projection and the projection area of ​​the cavum concha on the human sagittal plane and the sound pressure level at the ear canal opening at a frequency of 500 Hz; a straight line 1602 represents the simulated linear relationship between the overlap ratio between the area of ​​the first projection and the projection area of ​​the cavum concha on the human sagittal plane and the sound pressure level at the ear canal opening at a frequency of 1 kHz; and a straight line 1603 represents the simulated linear relationship between the overlap ratio between the area of ​​the first projection and the projection area of ​​the cavum concha on the human sagittal plane and the sound pressure level at the ear canal opening at a frequency of 3 kHz. Figure 21A The hollow circular points in the figure represent the test data corresponding to different overlapping ratios between the area of ​​the first projection and the projection area of ​​the concha cavity on the sagittal plane of the human body at a frequency of 500 Hz; Figure 21A The black circular points in the figure represent the test data corresponding to different overlapping ratios between the area of ​​the first projection and the projection area of ​​the concha cavity on the sagittal plane of the human body at a frequency of 1 kHz; Figure 21A The lighter grayscale dots in the figure represent the test data corresponding to the different overlapping ratios between the area of ​​the first projection and the projection area of ​​the concha cavity on the sagittal plane of the human body at a frequency of 3kHz. Figure 21AIt can be seen that at different frequencies, the overlap ratio between the first projection area and the projection area of ​​the cavum concha on the human sagittal plane varies approximately linearly with the sound pressure level at the user's ear canal opening. When the overlap ratio between the projection area of ​​the sound-emitting portion 1201 and the projection area of ​​the cavum concha on the human sagittal plane is greater than 10%, the sound pressure level measured at the ear canal opening at specific frequencies (e.g., 500 Hz, 1 kHz, 3 kHz) is significantly improved compared to when the projection area of ​​the sound-emitting portion 1201 and the projection area of ​​the cavum concha on the human sagittal plane do not overlap (the overlap ratio is 0). Furthermore, because an excessive overlap ratio between the projection area of ​​the sound-emitting portion 1201 and the projection area of ​​the cavum concha on the human sagittal plane may affect the opening of the ear canal, thereby affecting the user's ability to perceive sounds from the external environment, the overlap ratio between the projection area of ​​the sound-emitting portion 1201 and the projection area of ​​the cavum concha on the human sagittal plane should not be too large. For example, the overlap ratio between the projection area of ​​the sound portion 11 on the human body and the projection area of ​​the cavum concha on the human sagittal plane should not exceed 62%. Based on this, in order to ensure the acoustic output quality of the sound-producing part 1201, the overlap ratio between the projection of the sound-producing part 1201 and the projection of the cavum concha on the human body's sagittal plane can be between 10% and 60%. Furthermore, the overlap ratio between the projection of the sound-producing part 1201 and the projection of the cavum concha on the human body's sagittal plane can be between 10% and 45%. Still further, the overlap ratio between the projection of the sound-producing part 1201 and the projection of the cavum concha on the human body's sagittal plane can be between 11.82% and 40%. Further, the overlap ratio between the projection of the sound-producing part 1201 and the projection of the cavum concha on the human body's sagittal plane can be between 18% and 38%. Still further, the overlap ratio between the projection of the sound-producing part 1201 and the projection of the cavum concha on the human body's sagittal plane can be between 25% and 38%.

[0136] Reference Figure 21B , where the abscissa is the distance between the centroid O of the projection of the sound-emitting part 1201 and the centroid Q of the projection of the ear canal opening on the human sagittal plane, and the ordinate is the frequency response sound pressure level at the ear canal opening corresponding to different distances. Line 1604 represents the linear relationship between the distance between the centroid O of the projection of the sound-emitting part 1201 and the centroid Q of the projection of the ear canal opening on the human sagittal plane and the sound pressure level at the ear canal opening under ideal conditions at a frequency of 500 Hz; line 1605 represents the linear relationship between the distance between the centroid O of the projection of the sound-emitting part 1201 and the centroid Q of the projection of the ear canal opening on the human sagittal plane and the sound pressure level at the ear canal opening at a frequency of 1 kHz; and line 1606 represents the linear relationship between the distance between the centroid O of the projection of the sound-emitting part 1201 and the centroid Q of the projection of the ear canal opening on the human sagittal plane and the sound pressure level at the ear canal opening at a frequency of 3 kHz. Figure 21BThe hollow circular points in the figure represent the test data corresponding to different distances between the centroid O of the projection of the sound-producing part 1201 and the centroid Q of the projection of the auditory canal opening on the sagittal plane of the human body when the frequency is 500 Hz; Figure 21B The black circular points in the figure represent the test data corresponding to different distances between the centroid O of the projection of the sound-producing part 1201 and the centroid Q of the projection of the auditory canal opening on the sagittal plane of the human body when the frequency is 1 kHz; Figure 21B The lighter grayscale dots in the figure represent the test data corresponding to the centroid O of the projection of the sound-producing part 1201 and the centroid Q of the projection of the ear canal opening on the sagittal plane of the human body at different distances when the frequency is 3kHz. Figure 21B It can be seen that at different frequencies, the distance between the centroid O of the projection of the sound-emitting part 1201 and the centroid Q of the projection of the ear canal opening on the human body sagittal plane is approximately negatively correlated with the sound pressure level at the user's ear canal opening. Overall, the sound pressure level of the sound of a specific frequency (for example, 500Hz, 1kHz, 3kHz) measured at the ear canal opening shows a downward trend as the distance between the centroid O of the projection of the sound-emitting part 1201 and the centroid Q of the projection of the ear canal opening on the human body sagittal plane increases. Here, combined with Figure 21A and Figure 21B , the greater the distance between the centroid O of the projection of the sound-emitting part 1201 and the centroid Q of the projection of the ear canal opening on the sagittal plane of the human body, the smaller the overlap ratio between the projection area of ​​the sound-emitting part 1201 and the projection area of ​​the ear canal opening on the sagittal plane of the human body. The overlap ratio will affect the relative position between the sound outlet of the sound-emitting part 1201 and the ear canal opening. For example, the greater the distance between the centroid O of the projection of the sound-emitting part 1201 and the centroid Q of the projection of the ear canal opening on the sagittal plane of the human body, the greater the overlap ratio, and at this time, the closer the sound outlet of the sound-emitting part 1201 is to the ear canal opening, the better the listening effect at the ear canal opening. In addition, when the distance between the centroid O of the projection of the sound-emitting part 1201 and the centroid Q of the projection of the ear canal opening on the sagittal plane of the human body is too small, the overlap ratio between the projection area of ​​the sound-emitting part 1201 and the projection area of ​​the ear canal opening on the sagittal plane of the human body is too large, and the sound-emitting part 1201 may cover the user's ear canal opening, affecting the user's acquisition of sound information in the external environment. According to Figure 21BIt can be seen that, taking a frequency of 3 kHz as an example, when the distance between the centroid O of the projection of the sound-emitting part 1201 and the centroid Q of the projection of the ear canal opening on the human sagittal plane is 4 mm, 5.8 mm, and 12 mm, the sound pressure levels at the ear canal opening measured are ~73 dB, ~76 dB, and ~82 dB, respectively. When the distance between the centroid O of the projection of the sound-emitting part 1201 and the centroid Q of the projection of the ear canal opening on the human sagittal plane is 17 mm and 22 mm, the sound pressure levels at the ear canal opening measured are ~85 dB and ~83 dB, respectively. This shows that the distance between the centroid O of the projection of the sound-emitting part 1201 and the centroid Q of the projection of the ear canal opening on the human sagittal plane should not be too large. In some embodiments, to ensure that the earphones have good acoustic output quality when worn (for example, a sound pressure level greater than ~82dB at the ear canal opening) and to ensure that the user can receive sound information from the external environment, the distance between the centroid O of the projection of the sound-emitting portion 1201 and the centroid Q of the projection of the ear canal opening on the human sagittal plane can be 3mm to 13mm. Furthermore, the distance between the centroid O of the projection of the sound-emitting portion 1201 and the centroid Q of the projection of the ear canal opening on the human sagittal plane can be 4mm to 10mm. Furthermore, the distance between the centroid O of the projection of the sound-emitting portion 1201 and the centroid Q of the projection of the ear canal opening on the human sagittal plane can be 4mm to 7mm. Furthermore, the distance between the centroid O of the projection of the sound-emitting portion 1201 and the centroid Q of the projection of the ear canal opening on the human sagittal plane can be 4mm to 6mm.

[0137] In some embodiments, the distance between the centroid of the projection of the sound-emitting part 1201 on the human sagittal plane and the centroid of the projection of the ear canal opening on the human sagittal plane is within a suitable range, which can achieve higher sound production efficiency. On this basis, the size of the transducer or battery can be appropriately reduced, thereby reducing the ratio of the sixth area to the projection area of ​​the auricle on the human sagittal plane. In some embodiments, in order to enable the sound-emitting part 1201 to form a more ideal cavity-like structure with the cavum concha, the distance between the centroid of the projection of the sound-emitting part 1201 on the human sagittal plane and the centroid of the projection of the ear canal opening on the human sagittal plane can be between 4 mm and 7 mm, and the ratio of the second area to the projection area of ​​the auricle on the human sagittal plane is between 0.3 and 0.5. Furthermore, the distance between the centroid of the projection of the sound-emitting part 1201 on the sagittal plane of the human body and the centroid of the projection of the ear canal opening on the sagittal plane of the human body can be between 4 mm and 6 mm, and the ratio of the second area to the projection area of ​​the auricle on the sagittal plane of the human body is between 0.32 and 0.45. At this time, a baffle is formed between at least part of the sound-emitting part 1201 and the antihelix area, which is more conducive to increasing the sound intensity in the ear canal and ensuring the listening effect.

[0138] It should be noted that the frequency response curves corresponding to different overlapping ratios and the frequency response curves corresponding to the centroid of the first projection and the centroid of the projection of the ear canal opening on the sagittal plane of the human body measured in the embodiments of this specification are measured by changing the wearing position of the sound-emitting part 1201 (for example, translating along the sagittal axis) when the wearing angle of the sound-emitting part 1201 (the angle between the upper side wall or the lower side wall and the horizontal direction, for example, the angle between the upper side wall and the horizontal direction is 0°) and the dimensions in the long axis direction, the short axis direction and the thickness direction are constant.

[0139] While the basic concepts have been described above, it will be apparent to those skilled in the art that the detailed disclosure is merely illustrative and does not limit this specification. Although not explicitly stated herein, various modifications, improvements, and revisions to this specification may be made by those skilled in the art. Such modifications, improvements, and revisions are suggested in this specification and remain within the spirit and scope of the exemplary embodiments of this specification.

[0140] The specific embodiments described in this application are merely exemplary, and one or more technical features in the specific embodiments are optional or additional and do not constitute essential technical features of the inventive concept of this application. In other words, the scope of protection of this application encompasses and is far broader than the specific embodiments.

[0141] This specification also uses specific terms to describe the embodiments of this specification. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that the mention of "one embodiment," "an embodiment," or "an alternative embodiment" two or more times in different locations in this specification does not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of this specification may be appropriately combined.

[0142] Similarly, it should be noted that, in order to simplify the presentation of this specification and thus facilitate understanding of one or more embodiments of the invention, the foregoing descriptions of the embodiments of this specification sometimes combine multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not imply that the subject matter of this specification requires more features than those mentioned. In fact, an embodiment may have fewer features than all of the features of a single embodiment disclosed above.

[0143] Finally, it should be understood that the embodiments described in this specification are intended only to illustrate the principles of the embodiments of this specification. Other variations may also fall within the scope of this specification. Therefore, by way of example and not limitation, alternative configurations of the embodiments of this specification may be considered consistent with the teachings of this specification. Accordingly, the embodiments of this specification are not limited to the embodiments explicitly described and illustrated in this specification.

Claims

1. A headset, characterized in that: include: a sound-producing portion, the sound-producing portion being at least partially inserted into the concha cavity and being provided with at least one sound-emitting hole; An ear hook is provided between the auricle and the head of the user, and extends toward the side of the auricle away from the head and connects to the sound-producing part, so that the sound-producing part is worn near the ear canal but does not block the ear canal opening; Wherein, in a non-worn state, the ear hook and the sound-emitting portion form a first projection on a first plane, the first projection including an outer contour, a first end contour, an inner contour, and a second end contour, and the outer contour, the first end contour, the second end contour, and a tangent segment connecting the first end contour and the second end contour of the first projection jointly define a first closed curve, and the ratio of the projected area of ​​the sound-emitting portion on the first plane to the first area of ​​the first closed curve is between 0.25 and 0.4; The first plane is configured as a support surface for placing the ear hook, or as a human sagittal plane, or as a plane formed by a bisector that bisects the ear hook in a longitudinal extension direction or a deviated bisector.

2. The earphone according to claim 1, wherein: The first area is within the range of 1000mm 2 ~1500mm 2 The projection area of ​​the sound-emitting part on the first plane is between 202 mm and 2 ~560mm 2 between.

3. The earphone according to claim 2, wherein: The first area is within the range of 1150mm 2 ~1350mm 2 The projection area of ​​the sound-emitting part on the first plane is between 330mm and 2 ~440mm 2 between.

4. The earphone according to any one of claims 1 to 3, characterized in that: In the non-worn state, the inner contour, the first end contour, the second end contour and the tangent segment connecting the first end contour and the second end contour jointly define a third closed curve, and the ratio of the projected area of ​​the sound-emitting part on the first plane to the third area of ​​the third closed curve is between 0.67 and 1.

06.

5. The earphone according to any one of claims 1 to 3, characterized in that: In a non-wearing state, a ratio of a projected area of ​​the sound-emitting portion on the first plane to a projected area of ​​the earphone on the first plane is between 0.35 and 0.

59.

6. The earphone according to claim 5, wherein: In the non-wearing state, the projected area of ​​the earphone on the first plane is within 650mm 2 ~970mm 2 between.

7. The earphone according to any one of claims 1 to 3, characterized in that: In the worn state, the ear hook and the sound-emitting part form a second projection on the sagittal plane of the human body, the second projection including an outer contour, a first end contour, an inner contour, and a second end contour, and the first end contour, the second end contour, and a tangent segment connecting the first end contour and the second end contour of the second projection jointly define a second closed curve; A ratio of a projected area of ​​the sound-emitting portion on the first plane to a second area of ​​the second closed curve is between 0.2 and 0.

35.

8. The earphone according to claim 7, wherein: In the worn state, the inner contour of the second projection, the first end contour, the second end contour, and a tangent segment connecting the first end contour and the second end contour together define a fourth closed curve; A ratio of a projected area of ​​the sound-emitting portion on the first plane to a fourth area of ​​the fourth closed curve is between 0.51 and 0.

72.

9. The earphone according to claim 7, wherein: The ratio of the projection area of ​​the sound-producing part on the first plane to the projection area of ​​the auricle on the sagittal plane of the human body is between 0.15 and 0.

33.

10. The earphone according to claim 7, wherein: When the earphones are worn, the overlap ratio between the projection area of ​​the sound-producing part on the sagittal plane of the human body and the projection area of ​​the cavum concha on the sagittal plane of the human body is not less than 44.01%; The ratio of the second area to the projection area of ​​the auricle on the sagittal plane of the human body is between 0.8 and 1.

1.

11. The earphone according to claim 7, wherein: When the device is worn, the ratio of the overlapping area of ​​the projection of the sound-producing part on the sagittal plane of the human body and the projection of the cavum concha on the sagittal plane of the human body to the projection area of ​​the sound-producing part on the sagittal plane of the human body is not less than 42.16%; The ratio of the second area to the projection area of ​​the auricle on the sagittal plane of the human body is between 0.8 and 1.

1.

12. The earphone according to claim 7, wherein: When the headset is worn, the distance between the projection of the end of the sound-producing part on the sagittal plane of the human body and the projection of the edge of the cavum concha on the sagittal plane of the human body is no more than 16 mm; The ratio of the second area to the projection area of ​​the auricle on the sagittal plane of the human body is between 0.8 and 1.

1.

13. The earphone according to claim 7, wherein: In the wearing state, the distance between the centroid of the projection of the sound-emitting part on the sagittal plane of the human body and the centroid of the projection of the ear canal opening on the sagittal plane of the human body is in the range of 8 mm to 12 mm; The ratio of the second area to the projection area of ​​the auricle on the sagittal plane of the human body is between 0.8 and 1.

1.

14. A headset, characterized in that: include: a sound-producing portion, the sound-producing portion at least partially covering the antihelix area; An ear hook is provided between the auricle and the head of the user, and extends toward the side of the auricle away from the head and connects to the sound-producing part, so that the sound-producing part is worn near the ear canal but does not block the ear canal opening; Wherein, in the non-wearing state, the ear hook and the sound-emitting part form a fifth projection on the first plane, the fifth projection including an outer contour, a first end contour, an inner contour, and a second end contour, and the outer contour, the first end contour, the second end contour, and the tangent segment connecting the first end contour and the second end contour of the fifth projection jointly define a fifth closed curve; a ratio of a projected area of ​​the sound-emitting portion on the first plane to a fifth area of ​​the fifth closed curve is between 0.4 and 0.75; The first plane is configured as a support surface for placing the ear hook, or as a human sagittal plane, or as a plane formed by a bisector that bisects the ear hook in a longitudinal extension direction or a deviated bisector.

15. The earphone according to claim 14, wherein: The fifth area is within the range of 400 mm 2 ~800mm 2 The projection area of ​​the sound-emitting part on the first plane is between 236 mm and 2 ~565mm 2 between.

16. The earphone according to claim 14 or 15, characterized in that: In a non-wearing state, a ratio of a projected area of ​​the sound-emitting portion on the first plane to a projected area of ​​the earphone on the first plane is between 0.4 and 0.

65.

17. The earphone according to any one of claims 14 to 15, characterized in that: The ratio of the projection area of ​​the sound-producing part on the first plane to the projection area of ​​the auricle on the sagittal plane of the human body is between 0.17 and 0.

35.

18. The earphone according to claim 17, wherein: In the non-wearing state, the projected area of ​​the earphone on the first plane is within 650mm 2 ~1050mm 2 between.

19. The earphone according to any one of claims 14 to 15, characterized in that: In the worn state, the ear hook and the sound-emitting portion form a sixth projection on the first plane, the sixth projection including an outer contour, a first end contour, an inner contour, and a second end contour, and the outer contour, the first end contour, the second end contour, and a tangent segment connecting the first end contour and the second end contour of the sixth projection jointly define a sixth closed curve; A ratio of a projected area of ​​the sound-emitting portion on the first plane to a sixth area of ​​the sixth closed curve is between 0.35 and 0.

75.

20. The earphone according to claim 19, wherein: When the headset is worn, the overlap ratio between the projection area of ​​the sound-producing part on the sagittal plane of the human body and the projection area of ​​the cavum concha on the sagittal plane of the human body is not less than 11.82%; The ratio of the sixth area to the projection area of ​​the auricle on the sagittal plane of the human body is between 0.3 and 0.

5.

21. The earphone according to claim 19, wherein: When the device is worn, the ratio of the overlapping area of ​​the projection of the sound-producing part on the sagittal plane of the human body and the projection of the cavum concha on the sagittal plane of the human body to the projection area of ​​the sound-producing part on the sagittal plane of the human body is not less than 11.18%; The ratio of the sixth area to the projection area of ​​the auricle on the sagittal plane of the human body is between 0.3 and 0.

5.

22. The earphone according to claim 19, wherein: When the wearer is in the wearing state, the distance between the projection of the end of the sound-producing part on the sagittal plane of the human body and the projection of the inner contour of the auricle on the sagittal plane of the human body is no more than 8 mm; The ratio of the sixth area to the projection area of ​​the auricle on the sagittal plane of the human body is between 0.3 and 0.

5.

23. The earphone according to claim 19, wherein: In the wearing state, the distance between the centroid of the projection of the sound-producing part on the sagittal plane of the human body and the centroid of the projection of the ear canal opening on the sagittal plane of the human body is in the range of 4 mm to 7 mm; The ratio of the sixth area to the projection area of ​​the auricle on the sagittal plane of the human body is between 0.3 and 0.5.

Images