Sound Generator

Abstract

The present application provides a sound generating device that includes a vibration membrane and a housing that includes a first sound conducting hole and a second sound conducting hole, the housing containing the vibration membrane, the first sound conducting hole and the second sound conducting hole being located on either side of the vibration membrane, and when a user wears the sound generating device, the distance between the first sound conducting hole and the user's ear canal opening is smaller than the distance between the vibration membrane and the user's ear canal opening, the range of the included angle between the connecting line connecting the first sound conducting hole and the second sound conducting hole and the connecting line connecting the center of gravity of the vibration membrane and the user's ear canal opening is smaller than 45°, and the distance between the second sound conducting hole and the user's ear canal opening is greater than the distance between the vibration membrane and the user's ear canal opening.

Description

[Technical field]

[0001] This application claims priority to International Application No. PCT / CN2020 / 140815, filed December 29, 2020, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of audio devices, and in particular to sound generating devices. [Background technology]

[0003] Compared with conventional canal-type earphones, open-type audio devices have the advantages of not blocking the ear canal, being safe, and being comfortable. When an open-type audio device is combined with a wearable device (e.g., glasses, VR), the structure of the wearable device (e.g., temples) exists as a structural support member of the audio device, while the audio device can complement the unity of the function of the conventional wearable device that is worn. For example, the audio device can be combined with a wearable device used in a special scene (e.g., cycling glasses, running glasses, etc.) to greatly improve the enjoyment during exercise, and the open design of the audio device can also ensure safety during exercise. Combining an audio device with a wearable device increases the weight of the wearable device, and the interference between the audio device and the ear (e.g., blocking the ear canal) affects the wearing experience of the user.

[0004] Based on the above problems, the present application provides a sound generating device having an excellent wearing experience, high listening effect, and high sound leakage reduction effect. Summary of the Invention [Means for solving the problem]

[0005] An acoustic generating device according to an embodiment of the present application includes a diaphragm, and a housing including a first sound guide hole and a second sound guide hole, the diaphragm is housed inside, and the first sound guide hole and the second sound guide hole are located on either side of the diaphragm, and when a user wears the acoustic generating device, the distance between the first sound guide hole and the user's ear canal opening is smaller than the distance between the diaphragm and the user's ear canal opening, the range of the included angle between a connecting line connecting the first sound guide hole and the second sound guide hole and a connecting line connecting the center of gravity of the diaphragm and the user's ear canal opening is smaller than 45°, and the distance between the second sound guide hole and the user's ear canal opening is greater than the distance between the diaphragm and the user's ear canal opening.

[0006] In some embodiments, the distance between the first sound guide hole and the user's ear canal is between 0.5 cm and 2.5 cm.

[0007] In some embodiments, the distance between the second sound guide hole and the user's ear canal is between 1.5 cm and 5 cm.

[0008] In some embodiments, the distance between the diaphragm and the user's ear canal is between 1.5 cm and 3 cm.

[0009] In some embodiments, a ratio of a distance between the diaphragm and the user's ear canal opening to a distance between the first sound guide hole and the user's ear canal opening is 1.4-3.

[0010] In some embodiments, a ratio of a distance between the second sound guide hole and the user's ear canal opening to a distance between the first sound guide hole and the user's ear canal opening is 1.4-5.

[0011] In some embodiments, the housing and the diaphragm form a first acoustic cavity for radiating sound, the first acoustic cavity being acoustically coupled to the first sound guide hole, the first sound guide hole being located on a different side wall of the housing corresponding to the first acoustic cavity.

[0012] In some embodiments, the first sound conducting hole includes a first hole portion and a second hole portion, the first hole portion is connected to the second hole portion, and the first hole portion and the second hole portion are located on different side walls of the housing corresponding to the first acoustic cavity.

[0013] In some embodiments, the length of the sidewall in which the first hole is located is greater than the length of the sidewall in which the second hole is located.

[0014] In some embodiments, the ratio of the length of the second hole to the length of the side wall on which it is located ranges from 1 / 6 to 2 / 3.

[0015] In some embodiments, the length of the second hole is greater than or equal to 1 / 6 of the length of the sidewall in which it resides.

[0016] In some embodiments, the sound generating device further includes a magnetic circuit structure, the magnetic circuit structure is connected to the housing, the vibrating membrane is connected to the magnetic circuit structure by a voice coil, the housing and the magnetic circuit structure form a second acoustic cavity for radiating sound, the second acoustic cavity is acoustically coupled to the second sound guide hole, and the second sound guide hole is located on a side wall corresponding to the second acoustic cavity.

[0017] In some embodiments, the magnetic circuit structure of the sound generating device includes a magnetic flux conducting cover, the magnetic flux conducting cover is separate from the vibration membrane, a partial structure of the magnetic flux conducting cover is one side wall of the housing, and the second sound conducting hole is located in the magnetic flux conducting cover.

[0018] In some embodiments, the ratio of the difference between the effective area of ​​the second sound guide hole and the effective area of ​​the first sound guide hole to the effective area of ​​the first sound guide hole or the effective area of ​​the second sound guide hole is 40% or less.

[0019] In some embodiments, the sound-generating device includes a mounting member including a connection segment and a downwardly concave segment connected to the connection segment, the downwardly concave segment causing an upper edge of the mounting member to have a downwardly concave recess in the mounting member, and the housing is connected to the downwardly concave segment.

[0020] In some embodiments, the downward concave segment is positioned adjacent to the user's ear when the user is wearing the wearing member, and the downward concave segment positions the first sound guide hole near the user's ear.

[0021] In some embodiments, the downward concave segment includes an attachment portion and a transition portion connected at an angle, the housing is mounted to the attachment portion or the transition portion, and the transition portion is bent and connected to the connection segment and extends downward.

[0022] In some embodiments, the angle ranges from 15° to 150°.

[0023] In some embodiments, the connection segment includes a first connection segment, and the transition portion is connected between the mounting portion and the first connection segment and is bent over and connected to the first connection segment and extends downward.

[0024] In some embodiments, the connecting segment further includes a second connecting segment, the second connecting segment being connected to one end of the mounting portion.

[0025] In some embodiments, the first sound conducting hole is located at at least one of an inner side of the downward concave segment facing the user's head, an edge of the downward concave segment facing the user's tragus, and a side of the downward concave segment facing the user's tragus.

[0026] In some embodiments, the mounting member includes a left ear mounting portion and a right ear mounting portion that span the left and right ears of a user, respectively. [Brief description of the drawings]

[0027] [Figure 1] FIG. 1 is an exemplary block diagram of a sound-generating device according to some embodiments of the present application. [Diagram 2] 1 is a schematic diagram of a sound generating device according to some embodiments of the present application. [Diagram 3] FIG. 2 is a schematic diagram of another sound generating device according to some embodiments of the present application. [Figure 4] FIG. 2 is a sound pressure level diagram at different positions of an acoustic unit according to some embodiments of the present application. [Diagram 5] 1 is a schematic diagram showing the distribution of acoustic units at different positions according to some embodiments of the present application; [Figure 6] FIG. 1 is a schematic diagram of an acoustic unit according to some embodiments of the present application. [Figure 7] 1A-1D are schematic diagrams of different acoustic units according to some embodiments of the present application. [Figure 8] 4A-4C are frequency response curve diagrams of different acoustic units according to some embodiments of the present application. [Figure 9] FIG. 2 is a schematic diagram of the distribution of different acoustic units at the ears according to some embodiments of the present application. [Figure 10A] FIG. 2 is a radiation directivity diagram of an acoustic unit according to some embodiments of the present application. [Figure 10B] FIG. 2 is a radiation directivity diagram of an acoustic unit according to some embodiments of the present application. [Figure 11] FIG. 2 is an exemplary principle diagram of dipole facial reflection according to some embodiments of the present application. [Figure 12] 1 is a schematic diagram of a sound generating device according to some embodiments of the present application. [Figure 13] 1 is a schematic diagram of a mounting member according to some embodiments of the present application; [Figure 14A] 1 is a schematic diagram of a mounting member according to some embodiments of the present application; [Figure 14B] 1 is a schematic diagram of a mounting member according to some embodiments of the present application, shown at a different viewing angle. [Figure 15] 1 is a schematic diagram of a mounting member according to some embodiments of the present application; [Figure 16] FIG. 2 is a schematic diagram of another mounting member shown in some embodiments of the present application. [Figure 17] FIG. 1 is a schematic diagram of an acoustic unit shown in some embodiments of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] In order to more clearly describe the technical means of the embodiments of the present application, the drawings necessary for the description of the embodiments will be briefly described below. Obviously, the drawings described below are only some examples or embodiments of the present application, and those skilled in the art can apply the present application to other similar scenarios based on these drawings without creative efforts. Unless it is obvious from the language environment or specified, the same symbols in the drawings represent the same structures or operations.

[0029] It should be understood that the terms "system," "apparatus," "unit," and / or "module" used herein are ways of distinguishing between different levels of assemblies, elements, components, parts, or structures, however, other terms may be used in place of the above terms if they achieve the same purpose.

[0030] As used herein and in the claims, unless otherwise clearly indicated through context, terms such as "a," "one," "one kind," and / or "the" do not specifically refer to the singular but may include the plural. In general, the terms "comprise" and "containing" are merely intended to indicate the inclusion of explicitly identified steps and elements, and these steps and elements are not intended to be an exclusive listing, and a method or apparatus may include other steps or elements.

[0031] In the embodiments of the present specification, a sound generating device is described. In some embodiments, the sound generating device may include a diaphragm and a housing. In some embodiments, the housing includes a first sound guide hole and a second sound guide hole, the diaphragm is in the housing, the first sound guide hole and the second sound guide hole are located on both sides of the diaphragm, respectively, and when a user wears the sound generating device, the distance between the first sound guide hole and the user's ear canal opening is smaller than the distance between the diaphragm and the user's ear canal opening, and the distance between the second sound guide hole and the user's ear canal opening is larger than the distance between the diaphragm and the user's ear canal opening, so that the first sound guide hole is close to the user's ear canal opening and the second sound guide hole is close to the user's ear canal opening. The second sound guide hole is away from the user's ear canal, and the sound output from the first sound guide hole and the sound output from the second sound guide hole that meets a specific condition (for example, the phase difference is about 180°) can form a dipole-like radiation, and in the far field, the sound output from the first sound guide hole and the sound output from the second sound guide hole are offset in antiphase, thereby reducing the sound leakage volume in the far field of the sound generating device and preventing the sound output from the sound generating device from being heard by nearby people. In some embodiments, the range of the included angle between the connecting line connecting the first sound guide hole and the second sound guide hole and the connecting line connecting the center of gravity of the diaphragm and the user's ear canal is less than 45°. When the user wears the sound generating device, the angle between the connecting line connecting the first sound guide hole and the second sound guide hole and the connecting line connecting the center of gravity of the diaphragm and the user's ear canal is a specific angle (e.g., smaller than 45°), and the direction of the dipole-like radiation formed by the sound output from the first sound guide hole and the sound output from the second sound guide hole is directed to the user's ear canal, further increasing the listening volume when the user wears the sound generating device and reducing the sound leakage volume in the far field. In some embodiments, when the sound generating device is a wearable device (e.g., glasses, smart helmet, etc.) with an audio function, the acoustic unit of the sound generating device does not interfere with the user's ear (e.g., block the ear canal), improving the user's experience when wearing it, while the installation of the first sound guide hole and the second sound guide hole can guarantee the acoustic performance and reduce sound leakage.

[0032] 1 is an exemplary block diagram of a sound-generating device according to some embodiments of the present application. As shown in FIG. 1, the sound-generating device 100 may include an acoustic unit 110 and a mounting member 120.

[0033] In some embodiments, the sound generating device 100 may include glasses, a smart bracelet, earphones, hearing aids, a smart helmet, a smart watch, smart clothing, a smart backpack, a smart accessory, etc., or any combination thereof. For example, the sound generating device 100 may be functional nearsighted glasses, reading glasses, cycling glasses, sunglasses, etc., smart glasses such as audio glasses with earphone function, or a head-mounted device such as a helmet, an augmented reality (AR) device, or a virtual reality (VR) device. In some embodiments, the augmented reality device or virtual reality device may include a virtual reality helmet, virtual reality glasses, augmented reality helmet, augmented reality glasses, etc., or any combination thereof. For example, the virtual reality device and / or the augmented reality device may include Google Glass, Oculus Rift, Hololens, Gear VR, etc.

[0034] The acoustic unit 110 may convert a signal including audio information into an audio signal. In some embodiments, the audio signal may include bone-conducted sound waves or air-conducted sound waves. For example, the acoustic unit 110 may generate mechanical vibrations to output sound waves (i.e., an audio signal) in response to receiving a signal including audio information. For example, when the acoustic unit 110 is an air conduction speaker, the acoustic unit 110 may include a housing 111, a vibrating member 112, and a magnetic circuit structure 113, the vibrating member 112 and the magnetic circuit structure 113 are accommodated in the housing 111, the vibrating member 112 and the magnetic circuit structure 113 are connected by a voice coil (not shown in FIG. 1), the vibrating member 112 is a vibrating membrane, the internal magnetic field of the magnetic circuit structure 113 changes in response to a signal (i.e., an electric signal) including sound, the voice coil vibrates under the action of the magnetic circuit structure 113, the vibrating member 112 (vibrating membrane) vibrates in response to the vibration of the voice coil, and the air inside the housing 111 is vibrated by the vibrating member 112 to generate sound waves. In some embodiments, the acoustic unit 110 may further include one or more sound guide holes, and the sound waves generated by the vibrating member 112 can be radiated to the outside through the sound guide holes. For example, when the acoustic unit 110 is a bone conduction speaker, the acoustic unit 110 may include a vibration member 112 and / or a vibration transmission element (e.g., at least a part of the housing of the mounting member 120 of the sound generating device 100) connected to the vibration member 112. The acoustic unit 110 involves the conversion of energy when mechanical vibration is generated, and the acoustic unit 110 can realize the conversion of a signal containing audio information into mechanical vibration, which can be transmitted to the user's auditory nerve in the manner of bone conduction by the acoustic transmission element. It is to be noted that when the acoustic unit 110 is a bone conduction speaker, the acoustic unit 110 may generate air-conducted sound waves while outputting mechanical vibration (i.e., bone-conducted sound waves). The above conversion process may include the coexistence and conversion of multiple different types of energy. For example, an electrical signal (i.e., a signal containing audio information) is directly converted into mechanical vibration by the vibration member 112 of the acoustic unit 110, and the mechanical vibration is transmitted by the vibration transmission component to transmit the sound wave.Further for example, audio information may be included in an optical signal, and a particular acoustic unit 110 may implement a process for converting the optical signal into an audio signal. Other energy types that may coexist and be converted during operation of the acoustic unit 110 include thermal energy, magnetic energy, etc. In some embodiments, the type of acoustic unit 110 may include one or more of moving coil, electrostatic, piezoelectric, balanced armature, pneumatic, electromagnetic, etc.

[0035] In some embodiments, the acoustic unit 110 may include one or more air conduction speakers. In some embodiments, the acoustic unit 110 may include one or more bone conduction speakers. In some embodiments, the acoustic unit 110 may include a combination of one or more bone conduction speakers and one or more air conduction speakers at the same time. In some embodiments, the acoustic unit 110 may be disposed on the mounting member 120 to transmit the emitted sound to the user. In some embodiments, the acoustic unit 110 may be disposed on an end of the mounting member 120 or any other position. For example, the acoustic unit 110 may be disposed on an end of the mounting member 120, but not on other positions of the mounting member 120. In some embodiments, multiple acoustic units 110 may be disposed on multiple positions of the mounting member 120. For example, at least one acoustic unit 110 is disposed on each of the end or other positions of the mounting member 120. In some embodiments, the acoustic unit 110 may be disposed on an outer surface of the mounting member 120 or on the inside of the mounting member 120. For example, the acoustic unit 110 may be located near a position where the mounting member 120 comes into contact with the user (e.g., at a position on the mounting member 120 from the temple to near the ear). For another example, the mounting member 120 may include a cavity for accommodating the acoustic unit 110, and at least a portion of the acoustic unit 110 may be accommodated within the cavity. For another example, the acoustic unit 110 and the mounting member 120 are an integral structure.

[0036] In some embodiments, the sound-generating device 100 may further include a visible member (not shown in FIG. 1 ). The visible member is bridged over a certain part of the user's body, such as an eye, a hand, or the like. The mounting member 120 may be connected to one or both ends of the visible member to maintain stable contact between the sound-generating device 100 and the user. In some embodiments, the visible member may be a lens, a display screen, or a display screen having a lens effect. In some embodiments, the visible member may further be a lens and its auxiliary member, or a display and its auxiliary member, and the auxiliary member may be a member such as a rim or a frame. In some embodiments, the visible member may be an auxiliary member that does not include a lens or a display.

[0037] In some embodiments, the mounting member 120 may be a member such as a temple or a headband. For example, if the mounting member 120 is a temple, the sound generating device 100 may include a visible member and two mounting members 120, each of which is connected to both ends of the visible member and spans the corresponding left and right ears. For example, if the mounting member 120 is a headband-type member, the headband-type member may be adjusted to fit the user's head shape, and various functional members may be installed thereon, and the sound generating device 100 may include a visible member and a mounting member 120 whose both ends are connected to both ends of the visible member. Note that the structure of the mounting member 120 can be adaptively adjusted according to the type of the sound generating device 100 or a specific application scene.

[0038] It should be understood that the block diagram shown in FIG. 1 is for illustrative purposes only and is not intended to limit the scope of the present application. Those skilled in the art may make various modifications and modifications under the guidance of the present application. All of these modifications and modifications are within the scope of protection applied for. In some embodiments, the number of parts shown in the figures may be adjusted according to the actual situation. In some embodiments, one or more parts shown in FIG. 1 may be omitted, and one or more other parts may be added or deleted. For example, the sound generating device 100 may not include the mounting member 120, and the housing 111 may have the mounting function of the mounting member 120. In some embodiments, one part may be replaced by another part that can achieve a similar function. In some embodiments, one part may be divided into multiple sub-parts, or multiple parts may be integrated into a single part. For example, the housing 111 and the mounting member 120 may be integrated into one part.

[0039] In order to further explain the sound generating device, the sound generating device will be exemplarily described below. FIG. 2 is a schematic diagram of a sound generating device according to some embodiments of the present application. The sound generating device 200 shown in FIG. 2 is a VR device or an AR device. As shown in FIG. 2, the sound generating device 200 may include a sound unit 210, a wearing member 220, and a visible member 230. In some embodiments, the wearing member 220 is a headband-type member, and may be made of an elastic material or have an adjustable length. Both ends of the wearing member 220 are connected to both ends of the visible member 230, respectively. When the user wears the sound generating device 200, the wearing member 220 and the visible member 230 surround the user's head, and the wearing of the sound generating device 200 is realized by the pressure of the wearing member 220 and the visible member 230 against the user's head. In some embodiments, the connection between the mounting member 220 and the visible member 230 may include, but is not limited to, a movable connection, such as a rotatable connection or a telescoping connection, or may be a relatively fixed connection, such as a locking, threaded or integrally molded connection.

[0040] In some embodiments, the mounting member 220 may include a lower recess 240 for disposing the acoustic unit 210. When the user wears the sound generating device 200, the lower recess 240 may be located near the user's ear (e.g., on the front side, upper side, etc.). In this way, the acoustic unit 210 can be located at a position close to the user's ear and not block the user's ear canal, and the user can hear the sound emitted from the acoustic unit 210 and receive sounds from the external environment at the same time. In some embodiments, the acoustic unit 210 may be located on the outer surface of the lower recess 240. For example, if the acoustic unit 210 is a bone conduction speaker, the acoustic unit 210 may be located on a side of the lower recess 240 that contacts the user. Also, for example, if the acoustic unit 210 is an air conduction speaker, the acoustic unit 210 may be located on a side of the lower recess 240 that does not contact the user. In some embodiments, the acoustic unit 210 may be located inside the lower recess 240. For example, the lower recess 240 may have a chamber (not shown in FIG. 2) in which the acoustic unit 210 is disposed, and the acoustic unit 210 may be located in the chamber. When the acoustic unit 210 is located in the chamber, the lower recess 240 may be a housing for the acoustic unit 210, and other members of the acoustic unit 210 (e.g., a magnetic circuit structure, a diaphragm, etc.) may be located in the lower recess 240. Taking an air conduction speaker as an example, in some embodiments, the acoustic unit 210 may include a diaphragm and a magnetic circuit structure (not shown in FIG. 2), the diaphragm and the magnetic circuit structure are connected by a voice coil, the magnetic circuit structure is connected to the housing (or the lower recess 240) of the acoustic unit 210, the side of the diaphragm facing the magnetic circuit structure forms the front side of the acoustic unit 210, and the side of the magnetic circuit structure facing the diaphragm forms the back side of the acoustic unit 210, and the diaphragm vibrates, causing the acoustic unit to emit sound to the outside from its front side and back side, respectively.In some embodiments, the housing (or the lower recess 240) of the acoustic unit 210 may include at least two sound guide holes (not shown in FIG. 2), which may include a first sound guide hole (also called a sound outlet) and a second sound guide hole (also called a vent hole), where the first sound guide hole outputs the sound emitted from the front side of the acoustic unit 210, and the second sound guide hole outputs the sound emitted from the rear side of the acoustic unit 210. By considering that the phase of the sound output from the first sound guide hole and the phase of the sound output from the second sound guide hole are opposite, the sound output from the first sound guide hole and the sound output from the second sound guide hole can construct a dipole. When the user wears the sound generating device 200, the first sound guide hole is close to the user's ear canal opening and the second sound guide hole is facing away from the user's ear canal opening, so that the acoustic unit 210 has an excellent sound output effect. In some embodiments, the number of the first sound guide holes and the second sound guide holes may be one or more. In some embodiments, the listening effect and the sound leakage reduction effect of the sound generating device 200 can be further improved by adjusting parameters such as the number, size, position, and acoustic resistance of the first sound guide holes or the second sound guide holes. For details of the first sound guide holes, the second sound guide holes, and the lower recess 240, reference can be made to other parts of this specification, for example, Figures 4 to 11 and their related descriptions.

[0041] FIG. 3 is a schematic diagram of another sound generating device according to some embodiments of the present application. The sound generating device 300 shown in FIG. 3 is a pair of glasses, and as shown in FIG. 3, the sound generating device 300 may include an acoustic unit 310, a mounting member 320, and a visible member 330 (i.e., rims or lenses). In some embodiments, the mounting member 320 includes two temple structures, one end of the mounting member 320 is connected to an end of the visible member 330, and the two temple structures are respectively hung on the left and right ears of the user. When the user wears the sound generating device 300, the mounting member 320 is supported by the user's ear, and the visible member 230 is supported by the user's nose bridge, thereby realizing the wearing of the sound generating device 200. In some embodiments, the connection manner between the mounting member 320 and the visible member 330 includes, but is not limited to, a movable connection such as a rotatable connection or a stretchable connection, and may be a relatively fixed connection manner such as a locking, screwing, or integrally molded connection. The structure of the acoustic unit 310 is similar to that of the acoustic unit 210 shown in FIG. 2, and the structure of the lower recess 340 is similar to that of the lower recess 240 shown in FIG. 2, so that the description thereof will be omitted here.

[0042] The above description of the sound-generating device 200 and the sound-generating device 300 is merely for illustrative purposes and does not limit the scope of application of this specification. Those skilled in the art may make various modifications and changes to the sound-generating device 200 and the sound-generating device 300 under the guidance of this specification. However, these modifications and changes are still within the scope of this specification. For example, the mounting member 220 of the sound-generating device 200 may be a temple structure, and the mounting member 320 of the sound-generating device 300 may be a headband-type member.

[0043] When a user wears a sound generating device, in order to prevent the acoustic unit (e.g., acoustic unit 210, acoustic unit 310) from interfering with the user's ear and not affecting the user's reception of sounds from the external environment other than the acoustic unit, the acoustic unit may be located near the user's ear, and at least a part of the acoustic unit may be located within the projection area of ​​the user's ear onto the face. FIG. 4 is a sound pressure level diagram at different positions of the acoustic unit according to some embodiments of the specification of the present application, which shows the influence of the sound wave (i.e., the sound output from the first sound guide hole of the acoustic unit) obtained by actual testing on the volume of the sound heard at different positions in front of the ear. As shown in FIG. 4, as an exemplary explanation, the distribution positions of the first sound guide hole of the acoustic unit in front of the user's pinna are region 1, region 2, region 3, region 4, region 5, region 6, region 7, region 8 and region 9, and the lighter the color of the grayscale diagram in the right diagram of FIG. 4, the greater the sound pressure level heard in the human ear when the first sound guide hole is located near this region. For example, when the first sound guide hole of the acoustic unit is located in region 9, the listening volume is approximately 88 dB. For example, when the first sound guide hole of the acoustic unit is located in region 6, the listening volume is approximately 86 dB. For example, when the first sound guide hole of the acoustic unit is located in region 7, the listening volume is approximately 76 dB. As can be seen from FIG. 4, when the first sound guide hole of the acoustic unit is located near region 3, region 5, region 6, region 8, or region 9, the listening volume is large. Preferably, when the first sound guide hole of the acoustic unit is located near region 5, region 6, region 8, or region 9, it can be ensured that a large volume is heard by the listener. More preferably, when the first sound guide hole of the acoustic unit is located near region 6 or region 9, it can be ensured that a large volume is heard by the listener. In some embodiments, to ensure that a user can hear a loud sound volume when wearing the sound generating device, the first sound guide hole (see FIG. 7, view (a)) should be as close as possible to the user's ear canal opening. However, to ensure that the ear canal opening is open, the first sound guide hole needs to maintain a certain distance from the ear canal opening.The distance between the first sound guide hole and the user's ear canal opening may be the distance between the center of the first sound guide hole and the center position of the user's ear canal opening, or may be the distance between the center of the first sound guide hole and the plane on which the user's ear canal opening is located. In some embodiments, the distance between the first sound guide hole and the user's ear canal opening may be less than 4 cm. In some embodiments, the distance between the first sound guide hole and the user's ear canal opening may be less than 3 cm. In some embodiments, the distance range between the first sound guide hole and the user's ear canal opening may be 0.5 cm to 2.5 cm. In some embodiments, the distance range between the first sound guide hole and the user's ear canal opening may be 1 cm to 2 cm. The sound emitted from the diaphragm of the acoustic unit needs to be transmitted to the user's ear canal opening via an acoustic structure (e.g., an acoustic cavity, a sound guide tube, a sound guide hole, etc.), and in some embodiments, the hearing effect of the sound generating device can be improved by adjusting the distance between the center of gravity of the diaphragm and the user's ear canal opening. The center of gravity of the diaphragm here refers to the center of mass of the diaphragm. For example, the diaphragm has a circular structure, and the center of gravity of the diaphragm is the center of the circle of the circular diaphragm. Also, for example, the diaphragm has a rectangular structure, and the center of gravity of the diaphragm is the geometric center of the rectangle. The ear canal opening is an opening of the external ear canal of the human body, and the distance between the diaphragm and the user's ear canal opening may be the distance between the center of gravity of the diaphragm and the center position of the user's ear canal opening. In other embodiments, the distance between the diaphragm and the user's ear canal opening may be the distance between the center of gravity of the diaphragm and the plane on which the user's ear canal opening is located. In some embodiments, the distance between the center of gravity of the diaphragm and the user's ear canal opening may be less than 5 cm. In some embodiments, the distance between the center of gravity of the diaphragm and the user's ear canal opening may be less than 4 cm. In some embodiments, the distance range between the center of gravity of the diaphragm and the user's ear canal opening may be 1 cm to 4 cm. In some embodiments, the range of distance between the center of gravity of the diaphragm and the user's ear canal may be 1.5 cm to 3.5 cm. In some embodiments, the range of distance between the center of gravity of the diaphragm and the user's ear canal may be 2 cm to 3 cm. In some embodiments, the ratio of the distance between the center of gravity of the diaphragm and the user's ear canal to the distance between the first sound guide hole and the user's ear canal may be greater than 1.2.In some embodiments, the ratio of the distance between the center of gravity of the diaphragm and the user's ear canal to the distance between the first sound guide hole and the user's ear canal may be in the range of 1.2 to 4. In some embodiments, the ratio of the distance between the center of gravity of the diaphragm and the user's ear canal to the distance between the first sound guide hole and the user's ear canal may be in the range of 1.4 to 3. In some embodiments, the ratio of the distance between the center of gravity of the diaphragm and the user's ear canal to the distance between the first sound guide hole and the user's ear canal may be in the range of 1.5 to 2. In some embodiments, the ratio of the distance between the center of gravity of the diaphragm and the user's ear canal to the distance between the first sound guide hole and the user's ear canal may be in the range of 1.6 to 1.8.

[0044] Under the same sound source, different positions near the user's ears will affect the sound output effect of the sound unit. In some embodiments, the sound output effect of the sound unit in the sound generating device can be improved by adjusting the position of the first sound guide hole in the sound unit. Figure 5 is a distribution schematic diagram of the sound unit at different positions according to some embodiments of the present specification.

[0045] As shown in FIG. 5A, the sound generating device is a pair of glasses, and may include a mounting member 510 and an acoustic unit 511, where the mounting member 510 has a temple structure and the acoustic unit 511 has a rectangular parallelepiped structure, and the longer side of the acoustic unit 511 is connected to the mounting member 510, and the shorter side of the acoustic unit 511 is installed approximately perpendicular to the mounting member 510. When a user wears the sound generating device, the acoustic unit 511 may be located in front of the upper part of the auricle, and the shorter side of the acoustic unit 511 faces the auricle of the user. In some embodiments, the acoustic unit 511 may include a first sound guide hole (not shown in FIG. 5A) for outputting the sound generated in front of the acoustic unit 511 to the outside, and the first sound guide hole is located at the lower right corner of the acoustic unit 511, so that the first sound guide hole of the acoustic unit 511 is close to the ear canal of the user. Here, the position of the first sound conducting hole can be regarded as being near region 2 or region 3 shown in FIG.

[0046] The sound generating device shown in Fig. 5(b) has a structure almost the same as that of the sound generating device shown in Fig. 5(a), but differs in that the connection position between the sound unit 512 and the temple structure of the sound generating device shown in Fig. 5(b) is different from the connection position between the sound unit 511 and the temple structure of the sound generating device shown in Fig. 5(a). As shown in Fig. 5(b), the side of the sound unit 512 with a small length is connected to the mounting member, and the side of the sound unit 512 with a large length is installed almost perpendicular to the mounting member. When the user wears the sound generating device, the sound unit 512 may be located in front of the auricle, and the side of the sound unit 512 with a large length faces the auricle of the user. In some embodiments, the acoustic unit 512 may include a first sound guide hole (not shown in FIG. 5B) for outputting the sound generated in front of the acoustic unit 512 to the outside, and the first sound guide hole is located at the lower right corner of the acoustic unit 512, so that the first sound guide hole of the acoustic unit 512 is close to the user's ear canal. Taking the height of the user's ear canal as a reference plane, the position of the first sound guide hole shown in FIG. 5B is lower than the position of the first sound guide hole shown in FIG. 5A, i.e., the position of the first sound guide hole shown in FIG. 5B is closer to the user's ear canal, and the position of the first sound guide hole shown in FIG. 5B can be regarded as being near the region 5 or region 8 shown in FIG. 4.

[0047] The sound generating device shown in FIG. 5(c) has a structure similar to that of the sound generating device shown in FIG. 5(b), but differs in that the connection position between the sound unit 513 and the temple structure of the sound generating device shown in FIG. 5(c) is different from the connection position between the sound unit 512 and the temple structure of the sound generating device shown in FIG. 5(b). As shown in FIG. 5(c), the shorter side of the sound unit 513 is connected to the mounting member, and the longer side of the sound unit 513 is connected to the mounting member at an angle (for example, less than 90°), so that the first sound guide hole of the sound unit 513 is closer to the user's ear canal opening. When the user wears the sound generating device, the sound unit 513 may be located in front of the auricle, and the longer side of the sound unit 513 is inclined toward the user's ear canal opening, so that the first sound guide hole of the sound unit 513 is closer to the user's ear canal opening. Here, the position of the first sound conducting hole shown in FIG. 5(b) can be regarded as being in the vicinity of region 6 or region 9 shown in FIG.

[0048] FIG. 6 is a schematic diagram of an acoustic unit according to some embodiments of the present application. As shown in FIG. 6, the acoustic unit includes a housing 610 for mounting a diaphragm and a magnetic circuit structure (not shown in FIG. 6) of the acoustic unit. The diaphragm and the magnetic circuit structure are connected by a voice coil, and the magnetic circuit structure is connected to the housing 610. The side of the diaphragm facing the magnetic circuit structure forms the front side of the acoustic unit, and the side of the magnetic circuit structure facing the diaphragm forms the back side of the acoustic unit. When the diaphragm vibrates, the acoustic unit radiates sound to the outside from the front and back sides, respectively. In some embodiments, the housing 610 and the diaphragm form a first acoustic cavity for radiating sound, and the first acoustic cavity is acoustically coupled to a first sound guide hole, and the first sound guide hole is located on a different side wall of the housing corresponding to the first acoustic cavity. When a user wears the sound generating device, the first sound guide hole is close to the user's ear canal. In some embodiments, the first sound guide hole may include a first hole 621 and a second hole 622, the first hole 621 is connected to the second hole 622, and the first hole 621 and the second hole 622 are located on different side walls of the housing corresponding to the first acoustic cavity. For example, the first hole 621 and the second hole 622 are located on two adjacent side walls of the housing corresponding to the first acoustic cavity. Also, for example, the first hole 621 and the second hole 622 are located on two adjacent edges of the housing corresponding to the first acoustic cavity. In some embodiments, the length of the side wall where the first hole 621 is located may be greater than the length of the side wall where the second hole 622 is located. That is, the first hole 621 is located on the side wall of the housing 610 that is longer, and the second hole 622 is located on the side wall of the housing 610 that is shorter. When the acoustic unit is located in a mounting member (for example, the mounting member 510 shown in FIG. 5(c)), the first hole 621 and the second hole 622 of the first sound guide hole can be closer to the position of the user's ear canal. For example, the first hole 621 and the second hole 622 shown in FIG. 6 are located in the lower right corner of the housing 610.When the user wears the sound generating device, the acoustic unit may be located in front of the user's pinna as shown in FIG. 6, where the acoustic unit is installed at an angle, and the first hole 621 may come into contact with other parts of the user's ear (e.g., the tragus), and at this time cannot be directly directed to the user's ear canal, which affects the user's hearing experience. In order to improve the sound output effect of the acoustic unit, a second hole 622 is installed on another side wall adjacent to the side wall of the housing 610 where the first hole 621 is located, so that the first sound guide hole can be directed to the user's ear canal. For ease of understanding, here, the first hole 621 and the second hole 622 are regarded as an equivalent sound outlet 623, and the equivalent sound outlet 623 can be regarded as the connecting line area at both ends where the distance between the first hole 621 and the second hole 622 is maximum. When the acoustic unit is installed at an angle, the equivalent sound outlet 623 can be directed to the user's ear canal. In some embodiments, the acoustic unit may include at least one resonance frequency, which is positively correlated with the area of ​​the first sound guide hole of the acoustic unit, i.e., the larger the area of ​​the first sound guide hole 620, the higher the resonance frequency. When the acoustic unit has a high resonance frequency, the frequency response curve corresponding to the acoustic unit is flat in a frequency band lower than the resonance frequency, and in this case, the acoustic unit has a higher sound output effect in a wider frequency range. In this embodiment, the second hole portion 622 is installed on the acoustic unit based on the first hole portion 621, so that the first sound guide hole can be directed toward the user's ear canal, and the area of ​​the first sound guide hole can be increased, improving the resonance frequency of the acoustic unit, and thereby improving the sound output effect of the acoustic unit.

[0049] The first hole 621 is the main output part of the front sound of the acoustic unit, and the length of the first hole 621 may be relatively large. The longer the length of the first hole 621, the higher the resonance frequency of the first acoustic cavity and the first sound guide hole of the acoustic unit, so that the acoustic unit has a better acoustic output effect in a wider frequency band range. In some embodiments, the ratio of the length of the first hole 621 to the length of the side wall on which it is located is less than 0.9. In some embodiments, the ratio of the length of the first hole 621 to the length of the side wall on which it is located is in the range of 0.3 to 0.8. In some embodiments, the ratio of the length of the first hole 621 to the length of the side wall on which it is located is in the range of 0.4 to 0.8. In some embodiments, the ratio of the length of the first hole 621 to the length of the side wall on which it is located is in the range of 0.5 to 0.7.

[0050] In some embodiments, the length of the second hole 622 is 1 / 6 or more of the length of the sidewall on which it is located. In some embodiments, the ratio of the length of the second hole 622 to the length of the sidewall on which it is located ranges from 0.1 to 0.8. In some embodiments, the ratio of the length of the second hole 622 to the length of the sidewall on which it is located ranges from 1 / 6 to 2 / 3. In some embodiments, the ratio of the length of the second hole 622 to the length of the sidewall on which it is located ranges from 0.2 to 0.6. In some embodiments, the ratio of the length of the second hole 622 to the length of the sidewall on which it is located ranges from 0.3 to 0.5. In some embodiments, the first hole 621 and the second hole 622 may have a regular or irregular shape, such as a rectangle, a circle, a triangle, an ellipse, or a semicircle.

[0051] 6, the housing 610 of the acoustic unit is not limited to the rectangular parallelepiped structure, and may be other regular or irregular structures such as a cylinder, a stepped structure, a triangular prism, etc. In some embodiments, the length of the side wall where the first hole 621 is located may be the same as the length of the side wall where the second hole 622 is located, or may be smaller than the length of the side wall where the second hole 622 is located.

[0052] It should be understood that the schematic diagram shown in FIG. 6 is for illustrative purposes only and is not intended to limit the scope of the present application. Those skilled in the art can make various modifications and modifications under the guidance of the present application. All of these modifications and modifications are within the scope of protection applied for. In some embodiments, one or more features of the parts shown in the drawings, such as the shape, size, position, etc., may be adjusted according to actual circumstances. For example, the length of the first hole 621 may be greater than, equal to, or smaller than the length of the second hole 622, and the cross-sectional area of ​​the first hole 621 may be greater than, equal to, or smaller than the cross-sectional area of ​​the second hole 622.

[0053] To further explain the acoustic unit, some acoustic units are taken as examples as shown in Fig. 7. Fig. 7 is a schematic diagram of different acoustic units according to some embodiments of the present application.

[0054] As shown in FIG. 7 (a), the acoustic unit 710 may include a housing 711 and an acoustic transducer 712. In some embodiments, the housing 711 may be a rectangular parallelepiped structure with a hollow interior. In other embodiments, the housing 711 may further be other regular or irregular structures such as a cylinder, a stepped structure, a triangular prism, etc. The acoustic transducer 712 converts a signal including audio information into an audio signal. In some embodiments, the acoustic transducer 712 may include a diaphragm and a magnetic circuit structure, the diaphragm and the magnetic circuit structure are connected by a voice coil, and the magnetic circuit structure is connected to the housing 711. The internal magnetic field of the magnetic circuit structure changes in response to a signal including audio (i.e., an electric signal), the voice coil vibrates under the action of the magnetic circuit structure, the diaphragm vibrates in response to the vibration of the voice coil, and the air inside the housing 711 is vibrated by the diaphragm, thereby generating sound waves. In some embodiments, the side of the diaphragm of the acoustic transducer 712 away from the magnetic circuit structure is the front side of the diaphragm, and the other side of the diaphragm of the acoustic transducer 712 is the back side of the diaphragm, and the diaphragm radiates sound from the front side and the back side, respectively, by vibrating. In some embodiments, the housing 711 and the diaphragm form a first acoustic cavity 713 for radiating sound, and the housing 711 and the magnetic circuit structure form a second acoustic cavity 714 for radiating sound. In some embodiments, the acoustic unit 710 may further include a first sound guide hole 715 for outputting the sound generated in front of the diaphragm in the direction of the user's ear canal. The first sound guide hole 715 is acoustically coupled to the first acoustic cavity 713, and specifically, the first sound guide hole 715 is located in a side wall of the housing 711 where the first acoustic cavity 713 is located. In some embodiments, the first sound guiding hole 715 may include a first hole portion 7151 and a second hole portion 7152, where the first hole portion 7151 is located on a different side wall of the housing 711 corresponding to the first acoustic cavity 713.In some embodiments, the length of the side wall where the first hole 7151 is located is greater than the length of the side wall where the second hole 7152 is located, i.e., the first hole 7151 is located on the side wall where the length of the housing 711 is greater, and the second hole 7152 is located on the side wall where the length of the housing 711 is smaller. When the acoustic unit 710 is located on a mounting member (e.g., the mounting member 510 shown in FIG. 5), the first hole 7151 and the second hole 7152 can be closer to the position of the user's ear canal. For example, the first hole 7151 and the second hole 7152 shown in FIG. 7 (a) are located at the lower right corner of the housing 711. When the user wears the sound generating device, the sound unit 710 may be located in front of the user's pinna, where the sound unit 710 is installed at an angle, and the first hole 7151 may contact other parts of the user's ear (e.g., the tragus), and at this time cannot be directed toward the user's ear canal, affecting the user's hearing experience. In order to improve the sound output effect of the sound unit 710, the second hole 7152 is installed on another side wall adjacent to the side wall of the housing 711 where the first hole 7151 is located, so that the first sound guide hole 715 can be better directed toward the user's ear canal. For details of the first hole 7151 and the second hole 7152, please refer to FIG. 6 and its related description in this specification, and the description will be omitted here.

[0055] In order to reduce sound leakage from the acoustic unit 710, in some embodiments, the acoustic unit 710 may further include a second sound guide hole 716 for outputting sound emitted from the rear surface of the diaphragm to the outside environment. In some embodiments, the second sound guide hole 716 is located on one side wall of the housing 711 corresponding to the second acoustic cavity 714, and is acoustically coupled with the second acoustic cavity 714. In some embodiments, the second sound guide hole 716 is installed back to back with the first sound guide hole 715. Here, back to back installation can be understood as considering that the opening directions of the second sound guide hole 716 and the first sound guide hole 715 are reversed or nearly reversed. For example, the first sound guiding hole 715 is located in a first side wall and a second side wall of the housing 711, the first side wall and the second side wall are two adjacent side walls in the housing 711, the first hole portion 7151 of the first sound guiding hole 715 is located in the first side wall, the second hole portion 7152 of the first sound guiding hole 715 is located in the second side wall, the first hole portion 7151 communicates with the second hole portion 7152, and the first hole portion 7151 and the second hole portion 7152 are acoustically coupled to the first acoustic cavity 713. The second sound guiding hole 716 is located in a third side wall opposite to the second side wall, and the second sound guiding hole 716 is acoustically coupled to the second acoustic cavity 714. When a user wears the sound generating device, the first hole 7151 and the second hole 7152 of the first sound guide hole 715 face the user's ear canal, and the second sound guide hole 716 faces away from the user's ear canal. The sound output from the first sound guide hole 715 and the sound output from the second sound guide hole 716 that meets a specific condition (for example, a phase difference of about 180°) can form a dipole-like radiation, and in the far field, the sound output from the first sound guide hole 715 and the sound output from the second sound guide hole 716 are offset in antiphase, thereby reducing the sound leakage volume in the far field of the acoustic unit 710 and preventing the sound output from the acoustic unit 710 from being heard by nearby people.When the user wears the sound generating device, if the distance between the second sound guide hole 715 and the user's ear canal is too small, the sound output from the second sound guide hole 715 near the user's ear canal cancels out the sound output from the first sound guide hole 715, ensuring the listening volume at the user's ear canal and reducing the sound leakage volume in the far field, in some embodiments, the distance between the second sound guide hole 716 and the user's ear canal may be greater than 1 cm. Also, if the distance between the first sound guide hole 715 and the second sound guide hole 716 is too large or the distance between the second sound guide hole 716 and the ear canal is too large, the volume of the sound generating device is too large, which affects the user's wearing experience, and in order to ensure the user's wearing experience, in some embodiments, the distance between the second sound guide hole 716 and the user's ear canal is less than 8 cm. Preferably, the distance range between the second sound guide hole 716 and the user's ear canal opening may be 1.5 cm to 7 cm. More preferably, the distance range between the second sound guide hole 716 and the user's ear canal opening may be 1.5 cm to 5 cm. More preferably, the distance range between the second sound guide hole 716 and the user's ear canal opening may be 2 cm to 4.5 cm. More preferably, the distance range between the second sound guide hole 716 and the user's ear canal opening may be 2.5 cm to 4 cm. When the user wears the sound generating device, in order to ensure the listening volume at the user's ear canal opening and the sound leakage reduction effect in the far field of the sound generating device, the ratio of the distance between the second sound guide hole 716 and the user's ear canal opening and the distance between the first sound guide hole 715 and the user's ear canal opening may be increased as much as possible. In some embodiments, the ratio of the distance between the second sound guide hole 716 and the user's ear canal to the distance between the first sound guide hole 715 and the user's ear canal may be greater than 1.2. In some embodiments, the ratio of the distance between the second sound guide hole 716 and the user's ear canal to the distance between the first sound guide hole 715 and the user's ear canal may be in a range of 1.2 to 8. In some embodiments, the ratio of the distance between the second sound guide hole 716 and the user's ear canal to the distance between the first sound guide hole 715 and the user's ear canal may be in a range of 1.2 to 7. In some embodiments, the ratio of the distance between the second sound guide hole 716 and the user's ear canal to the distance between the first sound guide hole 715 and the user's ear canal may be in a range of 1.3 to 6.In some embodiments, the ratio of the distance between the second sound guide hole 716 and the user's ear canal to the distance between the first sound guide hole 715 and the user's ear canal may be in a range of 1.4 to 5. In some embodiments, the ratio of the distance between the second sound guide hole 716 and the user's ear canal to the distance between the first sound guide hole 715 and the user's ear canal may be in a range of 1.5 to 3. In some embodiments, the ratio of the distance between the second sound guide hole 716 and the user's ear canal to the distance between the first sound guide hole 715 and the user's ear canal may be in a range of 1.5 to 2.5.

[0056] As shown in FIG. 6, in some embodiments, by adjusting the included angle θ formed by the connecting line L connecting the first sound guide hole and the second sound guide hole 630 and the connecting line M connecting the center of gravity O of the diaphragm and the opening of the user's ear canal, the direction of the dipole-like radiation formed by the sound output from the first sound guide hole (including the first hole portion 621 and the second hole portion 622) and the sound output from the second sound guide hole 630 can be directed toward the user's ear canal, thereby increasing the listening volume when the user is wearing the acoustic unit and reducing the volume of sound leakage in the far field. In addition, the center of gravity O of the diaphragm can be regarded as approximately the center point of the diaphragm, and the process of adjusting the included angle θ can be regarded as a process of the acoustic unit rotating around the center of gravity O of the diaphragm, and at this time, the connecting line M connecting the center of gravity O of the diaphragm and the user's ear canal opening can be regarded as a straight line whose position is approximately fixed, and by adjusting (e.g., decreasing) the included angle θ, the first hole portion 621 of the first sound guide hole is installed at an angle with respect to the user's tragus, and the facing area between the first hole portion 621 and the user's tragus is reduced, thereby reducing the influence on the sound output from the first hole portion 621 of the tragus. Also, by adjusting the included angle θ, the second hole portion 622 adjacent to the first hole portion 621 is closer to the user's ear canal opening, and the user's listening volume can be further increased. In order to reduce the impact on the user's tragus and ensure that the sound volume heard in the user's ear canal is large, in some embodiments, the included angle θ formed by the connecting line L connecting the first sound guide hole and the second sound guide hole 630 and the connecting line M connecting the center of gravity O of the diaphragm and the user's ear canal may be smaller than 60°. In order to further reduce the impact on the user's tragus and increase the sound volume heard in the user's ear canal, in some embodiments, the included angle θ formed by the connecting line L connecting the first sound guide hole and the second sound guide hole 630 and the connecting line M connecting the center of gravity O of the diaphragm and the user's ear canal may be smaller than 45°. Preferably, the included angle θ formed by the connecting line L connecting the first sound guide hole and the second sound guide hole 630 and the connecting line M connecting the center of gravity O of the diaphragm and the user's ear canal may be smaller than 35°. More preferably, the included angle θ formed by the connecting line L connecting the first sound guide hole and the second sound guide hole 630 and the connecting line M connecting the center of gravity O of the vibrating membrane and the user's ear canal may be smaller than 20°.More preferably, the included angle θ formed by the connecting line L connecting the first sound guide hole and the second sound guide hole 630 and the connecting line M connecting the center of gravity O of the diaphragm and the user's ear canal may be smaller than 10°. In some embodiments, the smaller the included angle θ formed by the connecting line L connecting the first sound guide hole and the second sound guide hole 630 and the connecting line M connecting the center of gravity O of the diaphragm and the user's ear canal, the larger the distance difference between the first sound guide hole and the second sound guide hole 630 and the user's ear canal, and at this time, the degree of overlap cancellation between the sound transmitted from the second sound guide hole 630 to the user's ear canal and the sound transmitted from the first sound guide hole to the user's ear canal becomes smaller, and the volume heard by the user becomes larger. In order to further increase the listening volume at the user's ear canal, in some embodiments, the position and size of the first hole portion 621 and the second hole portion 622 in the first sound guide hole may be further adjusted. For details of the positions and dimensions of the first hole 621 and the second hole 622, reference can be made to the details of FIG.

[0057] The connecting line connecting the first sound guide hole and the second sound guide hole 620 may be a connecting line of the geometric centers of the two sound guide holes, or may be a connecting line of the geometric center of the equivalent sound guide hole 623 corresponding to the first sound guide hole and the geometric center of the equivalent sound guide hole of the second sound guide hole 630. The diaphragm may be installed parallel, vertical or inclined to the contact surface between the acoustic unit and the user's face, and specifically, can be adaptively adjusted according to the actual application scene. For the parameters of the first sound guide hole, the center of gravity of the diaphragm, and the ear canal opening, reference can be made to the explanations in other parts of the specification of this application, for example, FIG. 4 and its related explanations.

[0058] 7B is a schematic diagram of another acoustic unit according to some embodiments of the present application. The acoustic unit 720 shown in FIG. 7B has a structure similar to that of the acoustic unit 710 shown in FIG. 7A, but differs in that the structure and distribution of the second sound guide hole 726 of the acoustic unit 720 shown in FIG. 7B are different from that of the second sound guide hole 716 of the acoustic unit 710 shown in FIG. 7A. The housing 721, the acoustic transducer 722, the first acoustic cavity 723, the second acoustic cavity 724, and the first sound guide hole 725 in FIG. 7B are similar to the structures of the housing 711, the acoustic transducer 712, the first acoustic cavity 713, the second acoustic cavity 714, and the first sound guide hole 715 shown in FIG. 7A, respectively, and will not be described here. As shown in FIG. 7B, the second sound guide hole 726 may include a third hole portion 7261 and a second hole portion 7262, and the third hole portion 7261 and the second hole portion 7262 are acoustically coupled with the second acoustic cavity 724 to output sound emitted from the rear surface of the acoustic unit 720. In some embodiments, the third hole portion 7261 and the first hole portion of the first sound guide hole 725 (see the first hole portion 7151 in FIG. 7A) are installed back to back, and the fourth hole portion 7262 and the second hole portion of the first sound guide hole 725 (see the second hole portion 7152 in FIG. 7A) are installed back to back. Specifically, the third hole 7261 is located on a fourth side wall facing the first side wall where the first hole of the first sound guiding hole 725 is located, and the fourth hole 7262 is located on a third side wall facing the second side wall where the second hole of the first sound guiding hole 725 is located. When a user wears the sound generating device, the first hole and the second hole of the first sound guiding hole 725 face toward the user's ear canal, and the third hole 7261 and the fourth hole 7262 of the second sound guiding hole 726 face away from the user's ear canal.The sound output from the first sound guide hole 725 and the sound output from the second sound guide hole 726 that meets certain conditions (for example, a phase difference of approximately 180°) can form a dipole-like radiation, and in the far field, the sound output from the first sound guide hole 725 and the sound output from the second sound guide hole 726 cancel each other out in phase, thereby reducing the volume of sound leakage from the acoustic unit 720 in the far field and preventing people nearby from hearing the sound output from the acoustic unit 720.

[0059] FIG. 7(c) is a schematic diagram of another acoustic unit according to some embodiments of the present application. The acoustic unit 730 shown in FIG. 7(c) is almost the same as the acoustic unit 710 shown in FIG. 7(a), except that the acoustic unit 730 shown in FIG. 7(c) does not have a second acoustic cavity. The housing 731, the acoustic transducer unit 732, the first acoustic cavity 733, and the first sound guide hole 735 in FIG. 7(c) are similar to the housing 711, the acoustic transducer 712, the first acoustic cavity 713, and the first sound guide hole 715 shown in FIG. 7(a), respectively, and their descriptions are omitted here. As shown in FIG. 7(c), the acoustic unit 730 may include a housing 731 and an acoustic transducer unit 732. The magnetic circuit structure of the acoustic transducer unit 732 may include a magnetic flux conducting cover (not shown in FIG. 7C), the magnetic flux conducting cover is separated from the diaphragm, and a partial structure of the magnetic flux conducting cover is one side wall of the housing of the acoustic unit. As understood herein, the magnetic flux conducting cover may be one side wall of the housing 731. In some embodiments, the acoustic unit 730 may include one or more second sound conducting holes 736, and the second sound conducting holes 736 may be located in the magnetic flux conducting cover. In some embodiments, the shape of the second sound conducting holes 736 may be a regular or irregular shape, such as a circle, a semicircle, an ellipse, a triangle, a square (e.g., a rectangle), a pentagon, etc. In some embodiments, when the number of the second sound conducting holes 736 is plural, the shapes of the second sound conducting holes 736 may be the same or different. When a user wears the sound generating device, the first and second hole portions of the first sound guiding hole 735 face toward the user's ear canal and the second sound guiding hole 736 faces away from the user's facial area, where the sound output from the first and second sound guiding holes 735 and 736 can be considered to be approximately perpendicular to the face, and the sound output from the first and second sound guiding holes 735 and 736 becomes a quadrupole due to reflection off the face (which can be considered approximately as a baffle), generating a sound radiation directional diagram similar to a dipole.For details on the fact that the first sound guide hole 735 and the second sound guide hole 736 of the acoustic unit 730 can be considered to be installed approximately back-to-back, please refer to the descriptions elsewhere in the embodiments of this specification, for example, Figures 10A, 10B, 11 and their related descriptions.

[0060] 7(d) is a schematic diagram of another acoustic unit according to some embodiments of the present application. The acoustic unit 740 shown in FIG. 7(d) is almost the same as the acoustic unit 710 shown in FIG. 7(a), but differs in that the structure and distribution of the second sound guide hole 746 of the acoustic unit 720 shown in FIG. 7(b) and the second sound guide hole 716 of the acoustic unit 710 shown in FIG. 7(a) are different. The housing 741, acoustic transducer 742, first acoustic cavity 743, second acoustic cavity 744, and first sound guide hole 745 in FIG. 7(d) are similar to the structures of the housing 711, acoustic transducer 712, first acoustic cavity 713, second acoustic cavity 714, and first sound guide hole 715 shown in FIG. 7(a), respectively, and their description is omitted here. As shown in FIG. 7(d), the second sound guide hole 746 is located on the side wall of the housing 741 facing the magnetic flux conducting plate, and is acoustically coupled with the second acoustic cavity 744 to output the sound emitted from the rear surface of the acoustic unit 742. When the user wears the sound generating device, the first and second holes of the first sound guide hole 745 face the user's ear canal, and the second sound guide hole 746 faces away from the user's face area. The sound output from the first and second sound guide holes 745 and 746 is reflected by the face (which can be considered as a baffle) and the dipole becomes a quadrupole, generating a sound radiation directional diagram similar to that of a dipole.

[0061] To further explain the acoustic output effect of different acoustic units (e.g., acoustic unit 710, acoustic unit 720, and acoustic unit 730) in FIG. 7, reference will be made to FIG. 8 for more details. FIG. 8 is a frequency response curve diagram of different acoustic units according to some embodiments of the present application. In FIG. 8, the solid line (a) is the frequency response curve of the acoustic unit 710 in FIG. 7 (a), the dashed line b is the frequency response curve of the acoustic unit 720 in FIG. 7 (b), and the dashed line c is the frequency response curve of the acoustic unit 730 in FIG. 7 (c). As shown in Fig. 8, the three frequency response curves have a resonance peak 810 near 4kHz, which is mainly formed by the first acoustic cavity (e.g., the first acoustic cavity 713, the first acoustic cavity 723, and the first acoustic cavity 733) and the first sound guide hole (e.g., the first sound guide hole 715, the first sound guide hole 725, and the first sound guide hole 735). Since the structures of the first acoustic cavity and the first sound guide hole of the three types of acoustic units in Fig. 7(a), Fig. 7(b), and Fig. 7(c) are the same, the resonance peaks near 4kHz of the three frequency response curves overlap each other. In the acoustic unit 710 shown in Fig. 7(a), due to the structure of the second acoustic cavity 714 and the second sound guide hole 716, the corresponding frequency response curve a has a resonance peak 811 near 2.6kHz. In the acoustic unit 720 shown in FIG. 7(b), due to the structure of the second acoustic cavity 724 and the second acoustic hole 726, the corresponding frequency response curve b has a resonance peak 812 near 3.2 kHz. In the acoustic unit 730 shown in FIG. 7(c), due to the acoustic unit 730 only having the second acoustic hole 736 and no second acoustic cavity, the resonance frequency of the resonance frequency peak 813 in the corresponding frequency response curve c is relatively high, and the resonance frequency of the resonance frequency peak 813 is near 7 kHz. As can be seen from the above, in a specific frequency band (for example, 1000 Hz to 1000 Hz), if the acoustic unit does not have a second acoustic cavity, the frequency response curve is flatter and has a higher acoustic output effect.In some embodiments, reducing the volume of the second acoustic cavity can also improve the resonant frequency corresponding to the resonant peaks due to the second acoustic cavity (e.g., resonant peak 811 and resonant peak 812).

[0062] In some embodiments, the first sound guide hole and the second sound guide hole are arranged back-to-back or nearly back-to-back, and when the user wears the sound generating device, a connecting line connecting the center of the first sound guide hole and the center of the second sound guide hole may be directed to the user's ear canal. The first sound guide hole and the second sound guide hole are arranged back-to-back or nearly back-to-back, and the first sound guide hole is arranged close to the user's ear canal, so that the acoustic unit can ensure that the user can hear a large volume of sound. On the other hand, the second sound guide hole is arranged back-to-back to the user's ear canal, so that the sound output from the first sound guide hole and the sound output from the second sound guide hole are prevented from interfering with each other at the position of the user's ear canal, and the sound output from the first sound guide hole and the sound output from the second sound guide hole can be regarded as forming a dipole and canceled in the far field. Hereinafter, the positional relationship between the first sound guide hole, the second sound guide hole, and the user's ear canal opening will be described by way of example with reference to FIG.

[0063] It should be noted that the one or more embodiments described above are merely for illustration purposes and are not intended to limit the structure and shape of the acoustic unit. After fully understanding the principles of the acoustic unit, the acoustic unit can be modified to obtain an acoustic unit different from the embodiments of the present application. For example, the second sound guide hole of the acoustic unit may be partially located on the corresponding side wall of the second acoustic cavity, and the other partially located on the magnetic flux conducting cover of the magnetic circuit structure.

[0064] FIG. 9 is a schematic diagram of the distribution of different acoustic units at the ear according to some embodiments of the present application. The acoustic units in FIG. 9, FIG. a, FIG. b, FIG. c, and FIG. d may correspond to FIG. 7, FIG. a, FIG. b, FIG. c, and FIG. d, respectively. As shown in FIG. 9, FIG. 9, the first sound guide hole 715 is located at the lower right corner of the acoustic unit 710, and the second sound guide hole 716 is located at the upper left corner of the acoustic unit 710. When the user wears the acoustic unit 710, the first hole portion 7151 and the second hole portion 7152 of the first sound guide hole 715 are close to the user's ear canal, the second sound guide hole 716 faces away from the user's ear canal, and the connecting line connecting the center of the first sound guide hole 715 and the center of the second sound guide hole 716 is directed to the user's ear canal. As understood here, the center of the first sound guide hole 715 and the center of the second sound guide hole 716 are substantially collinear with the user's ear canal. The center of the sound guide hole here may be the geometric center of the sound guide hole or the geometric center of the equivalent sound guide hole. For example, in FIG. 9 (a), the equivalent sound guide hole of the first sound guide hole 715 can be regarded as the connecting line area at both ends where the distance between the first hole portion 7151 and the second hole portion 7152 is maximum, and here, the center of the first sound guide hole 715 may be the geometric center of the equivalent sound guide hole. The second sound guide hole 716 is rectangular, and the center of the second sound guide hole 716 is the geometric center of the rectangle. Also, for example, in FIG. 9 (b), the center of the first sound guide hole 725 may be the geometric center of the equivalent sound guide hole. The second sound guide hole 726 includes a third hole portion and a fourth hole portion, and the equivalent sound guide hole of the second sound guide hole 726 can be regarded as the connecting line area of ​​both ends where the distance between the third hole portion and the fourth hole portion is maximum, and the center of the second sound guide hole 726 may be the center of the equivalent sound guide hole. For example, in FIG. 9 (c), the center of the first sound guide hole 735 is the center of the equivalent sound guide hole. The second sound guide hole 736 includes multiple sub sound guide holes, and the center of the second sound guide hole 736 may be the geometric center of the multiple sub sound guide holes. For example, in FIG. 9 (d), the center of the first sound guide hole 745 is the center of the equivalent sound guide hole. The center of the second sound guide hole 746 is its geometric center.

[0065] FIG. 10A is a radiation directivity diagram when the first sound guide hole and the second sound guide hole of the acoustic unit in FIG. 7(b) are installed back to back. As shown in FIG. 10A, the radiation directivity diagram is approximately in the shape of a letter "8", and the main lobe direction of the "8" shape corresponds to the direction of the connecting line in FIG. 9(b) (see the dashed line in FIG. 10A), where the darker the color, the higher the sound pressure level of the sound. When a user wears a sound generating device, the person's ear is in the main lobe area of ​​the "8" shape (for example, the main lobe area 1010 and the main lobe area 1020), the sound pressure level of the sound heard by the user's ear is maximum, the sound pressure level perpendicular to the main lobe direction is relatively small, and the space perpendicular to the main lobe direction faces the external space, so that the sound leakage in the space can be effectively reduced and a certain degree of privacy protection effect can be achieved.

[0066] Fig. 10B is a radiation directivity diagram of the acoustic unit not including the second acoustic cavity in Fig. 7(c). Fig. 10B is almost the same as the radiation directivity diagram of the acoustic unit in Fig. 7(b) in which the openings of the acoustic unit face back to back with respect to Fig. 10A. As can be seen from this, from the structural point of view, the first sound guide hole 715 and the second sound guide hole 716 in Fig. 7(c) are not installed back to back, but due to the presence of boundary conditions (e.g., face), the sound output from the first sound guide hole 715 and the sound output from the second sound guide hole 716 are considered to be acoustically almost back to back.

[0067] In order to easily understand the boundary conditions, description will be given with reference to FIG. 11. FIG. 11 is an exemplary principle diagram of dipole face radiation according to some embodiments of the present application. As shown in FIG. 11, when a user wears a sound generating device, the first sound guide hole of the sound unit faces the user's ear canal and the second sound guide hole faces away from the user's face, where the sound output from the first sound guide hole is a sound wave 1110, and the sound output from the second sound guide hole is a sound wave 1120, and the sound wave 1110 and the sound wave 1120 can form a dipole radiation. The sound radiated outward by sound waves 1110 and 1120 can be considered to be approximately perpendicular to the human face, and sound waves 1110 and 1120 are reflected by the user's face to form sound waves 1130 and 1140 that are symmetrical to sound waves 1110 and 1120, and the dipole formed by sound waves 1110 and 1120 becomes a quadrupole, generating a sound radiation directional diagram similar to a dipole.

[0068] In order to ensure that the sound radiation amount at the first sound guide hole and the second sound guide hole is approximately the same so as to form the "8" shaped dipole, in some embodiments, the ratio of the difference between the effective area of ​​the second sound guide hole and the effective area of ​​the first sound guide hole to the effective area of ​​the first sound guide hole or the effective area of ​​the second sound guide hole is 40% or less. In some embodiments, the ratio of the difference between the effective area of ​​the second sound guide hole and the effective area of ​​the first sound guide hole to the effective area of ​​the first sound guide hole or the effective area of ​​the second sound guide hole is 30% or less. In some embodiments, the ratio of the difference between the effective area of ​​the second sound guide hole and the effective area of ​​the first sound guide hole to the effective area of ​​the first sound guide hole or the effective area of ​​the second sound guide hole is 20% or less. In some embodiments, the ratio of the difference between the effective area of ​​the second sound guide hole and the effective area of ​​the first sound guide hole to the effective area of ​​the first sound guide hole or the effective area of ​​the second sound guide hole is 20% or less. In some embodiments, the effective area of ​​the second sound guide hole may be equal to the effective area of ​​the first sound guide hole. Here, the effective area may be defined as the product of its actual area and the porosity of the covering acoustic resistive mesh, that is, the area through which air can pass from the opening. For example, when the outlet end of the sound guide hole is covered with an acoustic resistive mesh, the effective area of ​​the sound guide hole is the product of the actual area of ​​the sound guide hole and the porosity of the covering acoustic resistive mesh. Also, for example, when the outlet end of the vent hole is not covered with an acoustic resistive mesh, the effective area of ​​the sound guide hole is the actual area of ​​the sound guide hole.

[0069] FIG. 12 is a schematic diagram of a sound generating device according to some embodiments of the present application. As shown in FIG. 12, the sound generating device may include a mounting member 1210 and an acoustic unit 1220. The acoustic unit 1220 has a rectangular parallelepiped structure, and the side of the acoustic unit 1220 with a smaller length is connected to the mounting member 1210, and the side of the acoustic unit 1220 with a larger length is connected to the mounting member at an angle, so that the first sound guide hole at the lower right corner of the acoustic unit 1220 is closer to the user's ear canal opening, and the second sound guide hole at the upper left corner of the acoustic unit 1220 faces away from the ear canal opening. The acoustic unit 1220 is installed at an angle to the mounting member 1210, so that when the user wears the sound generating device, the first sound guide hole of the acoustic unit 1220 can be closer to the user's ear canal opening. In some embodiments, the included angle θ between the side of the acoustic unit 1220 with a larger length and the mounting member 1210 may be 5° to 85°. In some embodiments, the included angle θ may be 10° to 70°. In some embodiments, the included angle θ may be 15° to 60°. In some embodiments, the included angle θ may be 20° to 45°. In some embodiments, the included angle θ may be 30° to 90°. In some embodiments, the acoustic unit and the mounting member may be an integrally molded structure, and the acoustic unit may be located within the mounting member. FIG. 13 is a schematic diagram of a mounting member according to some embodiments of the present application. FIGS. 14A and 14B are schematic diagrams of the mounting member in FIG. 13 at different viewing angles. Referring to FIGS. 13, 14A, and 14B, the mounting member 1300 is provided with a lower concave segment 1320 and a connecting segment 1310 connected to the lower concave segment 1320. The lower concave segment 1320 causes the upper edge of the mounting member 1300 to have a concave recess downwardly in the mounting member. In this embodiment, since the lower concave segment 1320 is in a folded state, the flexibility of the lower concave segment 1320 can be improved. As a result, the mounting member 1300 is suitable for adaptively deforming according to the head shape of the user due to the presence of the lower concave segment 1320, and is further easily worn by the user. In some embodiments, an acoustic unit (not shown) is included in the lower concave segment 1320.The concave downward segment 1320 mounts the acoustic unit in close proximity to the user's ear. The connection segment 1310 connects the concave downward segment 1320 to the visible member of the sound-generating device and spans the user's pinna. The concave downward segment 1320 may be physically connected (e.g., glued, fitted, welded, riveted, screwed, snapped, etc.) to the connection segment 1310.

[0070] In some embodiments, the concave downward segment 1320 allows the acoustic unit to be located in front of the user's ear. In this context, the concave downward segment 1320 may be understood as the side of the user's ear that faces the user's face. For example, when the user wears the sound generating device, the concave downward segment 1320 may be located on the side of the ear that faces the user's eye, and thus, the acoustic unit located on the concave downward segment 1320 is closer to the user's ear canal opening, and the sound signal emitted from the acoustic unit is more easily transmitted to the user's ear.

[0071] In some embodiments, the lower concave segment 1320 may be set to any possible shape. The form of the lower concave segment 1320 may be understood as the shape of the structure of the lower concave segment 1320 or the shape of the concave of the lower concave segment 1320. Exemplary shapes of the lower concave segment 1320 may include, but are not limited to, a Y-shape, a V-shape, and a folded shape. Some exemplary lower concave segments are described below.

[0072] The concave lower segment 1320 may include a transition portion 1321 and a mounting portion 1322 connected at an angle. The acoustic unit may be installed in the mounting portion 1322. The transition portion 1321 is bent and connected to the connecting segment 1310 and extends downwards, so that when worn, it extends toward the ear canal of the user and reduces the distance between the acoustic unit installed therein and the ear canal. The transition portion 1321 may be a portion of the concave lower segment 1320 that is closer to the visible member. The mounting portion 1322 may be a portion of the concave lower segment 1320 that is closer to the ear of the user. In some embodiments, the shapes of the transition portion 1321 and the mounting portion 1322 may be different or the same. The mounting portion 1322 and the transition portion 1321 of the concave lower segment 1320 may be connected at any angle to form a concave lower segment 1320 of a different shape. Here, the fact that the mounting portion 1322 and the transition portion 1321 of the lower concave segment 1320 are connected to each other at an arbitrary angle means that the included angle formed by the mounting portion 1322 and the transition portion 1321 being connected may be any angle. In some embodiments, the included angle formed by the mounting portion 1322 and the transition portion 1321 may be in a range of 15° to 150°. In some embodiments, the included angle formed by the mounting portion 1322 and the transition portion 1321 may be in a range of 30° to 150°. In some embodiments, the included angle formed by the mounting portion 1322 and the transition portion 1321 may be in a range of 45° to 135°. In some embodiments, the included angle formed by the mounting portion 1322 and the transition portion 1321 may be in a range of 60° to 120°. In some embodiments, the angle formed by mounting portion 1322 and transition portion 1321 may be in the range of 75° to 90°. For example, the angle formed by mounting portion 1322 and transition portion 1321 may be 30°, 60°, 90°, or 120°, etc.

[0073] In some embodiments, the attachment portion 1322 and the transition portion 1321 may be connected in a removable manner, such as a threaded connection or an insertion connection. In some embodiments, the connection segment 1310 and the lower concave segment 1320 may be fixedly connected, for example, the connection segment 1310 and the lower concave segment 1320 may be connected in a manner such as welding, riveting, adhesive bonding, etc. In some embodiments, the attachment portion 1322 and the transition portion 1321 may be directly connected or may be connected by an adjustment structure. The adjustment structure may be a hinge, a ball joint, a telescopic rod, etc. The adjustment structure allows the attachment portion 1322 to rotate or translate relative to the transition portion 1321. In some embodiments, the attachment portion 1322 and the transition portion 1321 may further be a unitary structure.

[0074] As an exemplary illustration, in some embodiments, the downward concave segment 1320 may be V-shaped, i.e., the concave shape formed by the attachment portion 1322 and the transition portion 1321 may be V-shaped. The attachment portion 1322 is connected at one end to a portion of the connection segment 1310 away from the visible member (e.g., the first connection segment 1312) and extends downward at the other end, and the included angle formed by the attachment portion 1322 and the connection segment 1310 is approximately 90°. The transition portion 1321 is connected at one end to a portion of the connection segment 1310 close to the visible member (e.g., the second connection segment 1311) and extends toward the tragus of the user and is inclined at a certain angle relative to the connection segment 1310. The attachment portion 1322 is connected to the transition portion 1321 to form a downward V-shaped concave.

[0075] It should be noted that the one or more embodiments described above are merely illustrative and are not intended to limit the shape or number of the lower concave segment 1320. After fully understanding the principle of the lower concave segment 1320, the lower concave segment 1320 can be modified to obtain a lower concave segment 1320 different from the embodiments of the present application. For example, the shapes of the attachment portion 1322 and the transition portion 1321 may be adjusted so that the shape of the lower concave segment 1320 formed by the attachment portion 1322 and the transition portion 1321 is U-shaped. In some embodiments, the mounting member 1300 may include multiple lower concave segments 1320, and each lower concave segment 1320 may have a different shape. For example, the mounting member 1300 may include two lower concave segments 1320, one of which is a V-shaped structure and the other of which is a Y-shaped structure.

[0076] In some embodiments, the connecting segment 1310 may include a first connecting segment 1312 and a second connecting segment 1311. The downward concave segment 1320 is connected between the first connecting segment 1312 and the second connecting segment 1311. The first connecting segment 1312 spans the pinna. The second connecting segment 1311 is connected to the visible member. In some embodiments, the second connecting segment 1311 may be straight and connected to one end of the mounting portion 1322 and extends in a direction away from the first connecting segment 1312. The downward concave segment 1320 extends downward relative to the first connecting segment 1312 and the second connecting segment 1311, forming a protrusion and forming a recess.

[0077] In some application scenarios, when the mounting member 1300 is placed across the user's pinna, the downward concave segment 1320 may be located on the side of the pinna facing the user's eye, so that when the user wears it, the downward concave segment 1320 extends to the tragus, and the acoustic unit installed on the downward concave segment 1320 is accordingly closer to the tragus and closer to the user's ear canal, thus shortening the distance between the acoustic unit and the user's ear and more easily transmitting sound to the user.

[0078] In some embodiments, an acoustic unit (not shown) may be located inside the mounting portion 1322, and the mounting portion 1322 may be a housing structure with a hollow interior, and may be a housing of the acoustic unit. In some embodiments, the diaphragm and the magnetic circuit structure of the acoustic unit are connected by a voice coil, and the magnetic circuit structure is connected to the mounting portion 1322, and the side of the diaphragm away from the magnetic circuit structure is the front side of the diaphragm, and the other side of the diaphragm is the back side of the diaphragm, and the diaphragm radiates sound to the outside from the front side and the back side, respectively, by vibrating. In some embodiments, the mounting portion 1322 and the diaphragm form a first acoustic cavity for radiating sound, and the first acoustic cavity is acoustically coupled to a first sound guide hole 1330, and the first sound guide hole 1330 is located on a different side wall of the mounting portion 1322 corresponding to the first acoustic cavity. Furthermore, the first sound guide hole 1330 is located on a side wall away from the transition portion 1321 of the mounting portion 1322. When the user wears the sound generating device, the first sound guide hole 1330 is adjacent to the user's ear canal. In some embodiments, the first sound guide hole 1330 may include a first hole portion 1331 and a second hole portion 1332, where the first hole portion 1331 is located in a side wall away from the transition portion 1321 of the mounting portion 1322 and the second hole portion 1332 is located in a bottom side wall of the mounting portion 1322, and the first hole portion 1331 is connected to the second hole portion 1332.

[0079] In some embodiments, the acoustic unit further includes a second sound guide hole 1340 for outputting sound generated from the rear surface of the acoustic unit to the outside environment. The second sound guide hole 1340 is located on a different side wall of the mounting portion 1322 corresponding to the second acoustic cavity, and is acoustically coupled with the second acoustic cavity. In some embodiments, the second sound guide hole 1340 is disposed opposite to the first sound guide hole 1330. Here, the opposite arrangement can be understood to be considered as the opening directions of the second sound guide hole 1340 and the first sound guide hole 1330 being opposite or nearly opposite. The second sound guide hole includes a third hole portion 1341 and a fourth hole portion 1342, the third hole portion 1341 being located on a side wall adjacent to the transition portion 1321 of the mounting portion 1322, and the fourth hole portion being located on the top of the mounting portion 1322. When the user wears the sound generating device, the first hole 1331 and the second hole 1332 of the first sound guide hole 1330 face the user's ear canal, and the third hole 1341 and the fourth hole 1342 of the second sound guide hole 1340 face away from the user's ear canal. The sound output from the first sound guide hole 1330 and the sound output from the second sound guide hole 1340 that satisfies a specific condition (for example, a phase difference of about 180°) can form a dipole-like radiation, and in the far field, the sound output from the first sound guide hole 1330 and the sound output from the second sound guide hole 1340 are offset in opposite phase, thereby reducing the sound leakage volume in the far field of the acoustic unit and preventing the sound output from the acoustic unit from being heard by nearby people.

[0080] It should be noted that the one or more embodiments described above are merely for the purpose of explanation and are not intended to limit the positions of the first sound guide hole 1330 and the second sound guide hole 1340. By modifying the first sound guide hole 1330 and the second sound guide hole 1340 after fully understanding the principle of the opposing arrangement of the first sound guide hole 1330 and the second sound guide hole 1340, it is possible to obtain a first sound guide hole 1330 and a second sound guide hole 1340 different from the embodiments of the present application. For example, the positions of the first sound guide hole 1330 and the second sound guide hole 1340 may be adjusted so that the first sound guide hole 1330 or the second sound guide hole 1340 is located on one side wall of the mounting portion 1322. For details of the first sound guide hole 1330 and the second sound guide hole 1340, reference can be made to other parts of this specification, for example, FIG. 7(b) and its related description.

[0081] Fig. 15 is a schematic diagram of a mounting member according to some embodiments of the present application. The mounting member 1500 shown in Fig. 15 is almost the same as the mounting member 1300 shown in Fig. 13, Fig. 14A, and Fig. 14B in its overall structure, but differs in that the position of the second sound guide hole 1540 of the mounting member 1500 shown in Fig. 15 is different from those of the mounting member 1300 shown in Fig. 13. The first connection segment 1512, the second connection segment 1511, the transition portion 1521, the mounting portion 1522, the first sound guide hole 1530, the first hole portion 1531, and the second hole portion 1532 in Fig. 15 are similar in structure to the first connection segment 1312, the second connection segment 1311, the transition portion 1321, the mounting portion 1322, the first sound guide hole 1330, the first hole portion 1331, and the second hole portion 1332 shown in Fig. 13, Fig. 14A, and Fig. 14B, respectively. The magnetic circuit structure of the acoustic unit may include a magnetic flux conducting cover (not shown in FIG. 15), the magnetic flux conducting cover is separated from the diaphragm, and a partial structure of the magnetic flux conducting cover is one side wall of the mounting portion 1522. As understood herein, the magnetic flux conducting cover may be a side wall of the mounting portion 1522. In some embodiments, the mounting portion 1522 may include one or more second sound conducting holes 1540, and the second sound conducting holes 1540 may be located in the magnetic flux conducting cover. Here, the first sound conducting hole 1530 and the second sound conducting hole 1540 in the acoustic unit may be disposed substantially opposite to each other. When the user wears the sound generating device, the first sound conducting hole 1530 faces the ear canal of the user, and the second sound conducting hole 1540 faces away from the user's face. Note that the number of the second sound conducting holes 1540 is not limited to two as shown in FIG. 15, and may be one, three, four, or the like. For details of the first sound guiding hole 1530 and the second sound guiding hole 1540, reference may be made to the contents elsewhere in this specification, for example, FIG. 7(c) and its related description.

[0082] Fig. 16 is a schematic diagram of another mounting member according to some embodiments of the present application. The mounting member 1600 shown in Fig. 16 is almost the same as the mounting member 1600 shown in Fig. 13, Fig. 14A, and Fig. 14B in overall structure, but differs in that the position of the second sound guide hole 1640 of the mounting member 1600 shown in Fig. 16 is different from those. The first connection segment 1612, the second connection segment 1611, the transition portion 1621, the mounting portion 1622, the first sound guide hole 1630, the first hole portion 1631, and the second hole portion 1632 in Fig. 16 are similar to the structures of the first connection segment 1312, the second connection segment 1311, the transition portion 1321, the mounting portion 1322, the first sound guide hole 1330, the first hole portion 1331, and the second hole portion 1332 shown in Fig. 13, Fig. 14A, and Fig. 14B, respectively. As shown in Fig. 16, the second sound guide hole 1640 is located on one side wall of the mounting portion 1622 corresponding to the second acoustic cavity. When a user wears the sound generating device, the first sound guide hole 1630 faces the user's ear canal, and the second sound guide hole 1640 faces away from the user's face. For details of the first sound guide hole 1630 and the second sound guide hole 1640, reference may be made to other parts of this specification, for example, Fig. 7(d) and its related description.

[0083] It should be understood that the schematic diagrams shown in Figures 15 and 16 are for illustrative purposes only and are not intended to limit the scope of the present application. Those skilled in the art may make various modifications and modifications under the guidance of the present application. All of these modifications and modifications are within the scope of protection applied for. In some embodiments, one or more features, such as the shape, size, position, etc. of the parts shown in the figures may be adjusted according to actual conditions.

[0084] In some embodiments, the volume of the second acoustic cavity can be reduced to lower the resonance frequency corresponding to the resonance peak of the acoustic unit, and further improve the acoustic output effect of the acoustic unit. The shape or volume of the second acoustic cavity of the acoustic unit is related to the position of the acoustic transducer member (e.g., the diaphragm, the magnetic circuit structure) in the housing. For example, the second acoustic cavity is formed between the diaphragm and the housing, and the larger the gap between the side walls where the diaphragm and the housing are located, the larger the volume of the second acoustic cavity. In some embodiments, the volume of the second acoustic cavity can be reduced by reducing the gap between the diaphragm and the housing. In some embodiments, the volume of the second acoustic cavity can also be reduced by adjusting the structure of the housing.

[0085] FIG. 17 is a schematic diagram of a different acoustic unit according to some embodiments of the present application. As shown in FIG. 17 (a), an acoustic unit 1710 may include a housing 1711 and an acoustic transducer 1712. In some embodiments, the housing 1711 may be a rectangular parallelepiped structure with a hollow interior, and may include a protrusion 17111 protruding from one side wall of the housing to the outside. The acoustic transducer 1712 converts a signal including audio information into an audio signal. In some embodiments, the acoustic transducer 1712 may include a diaphragm and a magnetic circuit structure, the diaphragm and the magnetic circuit structure are connected by a voice coil, and the magnetic circuit structure is connected to the housing 1711. The internal magnetic field of the magnetic circuit structure changes in response to a signal including audio (i.e., an electric signal), the voice coil vibrates under the action of the magnetic circuit structure, the diaphragm vibrates in response to the vibration of the voice coil, and the air inside the housing 1711 is vibrated by the diaphragm, thereby generating sound waves. In some embodiments, the side of the diaphragm of the acoustic transducer 1712 away from the magnetic circuit structure is the front side of the diaphragm, and the other side of the diaphragm is the back side of the diaphragm, and the diaphragm radiates sound from the front side and the back side, respectively, by vibrating. In some embodiments, the housing 1711 and the front side of the diaphragm form a first acoustic cavity 1713 for radiating sound. The magnetic flux conducting cover of the magnetic circuit structure may be a complete side wall or a partial structure within one side wall of the housing 1711 where the protrusion 17111 is located, and the protrusion 17111 protrudes outward relative to the magnetic flux conducting cover, and a second acoustic cavity 1714 is formed between the back side of the diaphragm and the protrusion 17111. In some embodiments, the acoustic unit 1710 may further include a first sound conducting hole 1715 for outputting the sound generated on the front side of the diaphragm in the direction of the user's ear canal. The first sound guide hole 1715 is acoustically coupled with the first acoustic cavity 1713, specifically, the first sound guide hole 1715 is located on the side wall of the housing 1711 where the first acoustic cavity 1713 is located. In order to reduce sound leakage of the acoustic unit 1710, in some embodiments, the acoustic unit 1710 may further include a second sound guide hole 1716 for outputting sound emitted from the rear surface of the diaphragm to the outside environment.In some embodiments, the second sound guiding hole 1716 may be located on the magnetic flux conducting cover, and the second sound guiding hole 1716 on the magnetic flux conducting cover can directly output the sound generated on the back side of the diaphragm to the outside. In some embodiments, the second sound guiding hole 1716 may further be located on the side wall of the protrusion 17111 corresponding to the second acoustic cavity 1714, and the sound generated on the back side of the diaphragm is transmitted to the second acoustic cavity 1714 by a hole (not shown) on the magnetic flux conducting cover, and then output to the outside environment by the second sound guiding hole 1716 installed on the protrusion 17111. In some embodiments, the shape and number of the second sound guiding hole on the magnetic flux conducting cover and the second sound guiding hole on the protrusion 17111 may be the same. In some embodiments, the shape of the second sound guiding hole 1716 may be one or more of other regular or irregular shapes, such as a rectangle, a circle, a semicircle, an ellipse, a pentagon, a triangle, etc. In some embodiments, the shape and number of the second sound guiding holes on the magnetic flux conducting cover and the second sound guiding holes on the protrusion may be different. For example, in FIG. 17(b), the second sound guiding holes 1726 on the magnetic flux conducting cover are rectangular, and the shape of the second sound guiding holes 1726 on the protrusion are triangular. In some embodiments, the orientations of the second sound guiding holes on the magnetic flux conducting cover and the second sound guiding holes on the protrusion may be the same or different. For example, in FIG. 17(a) and FIG. 17(b), when the side walls of the magnetic flux conducting cover and the protrusion where the second sound guiding holes are located face the position of the vibration membrane of the acoustic conversion unit, the orientation of the second sound guiding holes on the magnetic flux conducting cover is the same as the orientation of the second sound guiding holes on the protrusion. Also, for example, in FIG. 17(c), the orientation of the second sound guiding holes 1736 installed on the magnetic flux conducting cover is different from the orientation of the second sound guiding holes 1736 installed on the protrusion. It should be noted that the second sound guide holes in the above embodiments (e.g., second sound guide hole 1716, second sound guide hole 1726, second sound guide hole 1736) are merely illustrative, and the position, quantity, size, shape, etc. of the second sound guide holes may be adjusted according to the actual application scene. As long as the first sound guide hole and the second sound guide hole are installed back-to-back or the sound output from the first sound guide hole and the sound output from the second sound guide hole are approximately back-to-back, any of these are within the scope of protection of this specification.

[0086] It should be noted that the achievable beneficial effects vary from embodiment to embodiment, and in different embodiments, the achievable beneficial effects may be any one or a combination of more of the above, or any other achievable beneficial effects.

[0087] Although the basic concept has been described above, it is clear to those skilled in the art that the detailed disclosure above is merely presented as an example and is not intended to limit the present application. Although not expressly described herein, those skilled in the art can make various changes, improvements and modifications to the present application. These changes, improvements and modifications are intended to be suggested by the present application and therefore fall within the spirit and scope of the exemplary embodiments of the present application.

[0088] Also, certain terms are used herein to describe embodiments of the present application. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the present application. Thus, it is emphasized and understood that references to "one embodiment," "one embodiment," or "one alternative embodiment" more than once in various parts of this specification do not necessarily all refer to the same embodiment. Also, certain features, structures, or characteristics in one or more embodiments of the present application may be combined as appropriate.

[0089] Additionally, unless expressly stated in the claims, the order of enumeration of processing elements or sequences, the use of alphanumeric characters, or the use of other designations does not limit the order of procedures and methods of the present application. While the above disclosure describes through various examples what are presently believed to be various useful embodiments of the invention, it should be understood that such details are merely for the purpose of illustration and that the appended claims are not limited to the disclosed embodiments, but on the contrary are intended to cover all modifications and equivalent combinations that are within the spirit and scope of the embodiments of the present application. For example, the system assembly described above may be implemented by a hardware device, but may also be implemented as a software-only solution, for example, by installing the described system on an existing server or mobile device.

[0090] Similarly, in the foregoing description of embodiments of the present application, it should be understood that various features may be grouped together in a single embodiment, figure, or description for the purpose of simplifying the application and facilitating an understanding of one or more embodiments of the present invention. This method of disclosure, however, should not be interpreted as reflecting an intention that the claimed subject matter requires more features than are recited in each claim. In fact, an embodiment may include fewer than all features of a single embodiment disclosed above.

[0091] In some embodiments, numbers describing the number of components and attributes are used, and it is understood that the numbers describing such embodiments are modified in some instances by the modifiers "about," "approximately," or "substantially." Unless otherwise specified, "about," "approximately," or "substantially" indicate that a variation of ±20% of the number described above is permitted. Thus, in some embodiments, all numerical parameters used in the specification and claims are approximations that may vary depending on the characteristics required for a particular embodiment. In some embodiments, the numerical parameters should be applied with the stated number of significant digits and ordinary rounding techniques. In some embodiments, the numerical ranges and parameters for determining the ranges are approximations; however, in specific embodiments, such numerical values ​​are set as precisely as possible.

[0092] All patents, patent applications, published patent applications, and other materials, such as articles, books, specifications, publications, documents, etc., referenced in this application are incorporated herein by reference in their entirety, except for prosecution history documents that are inconsistent or inconsistent with the content of this application, and documents that may have a limiting effect on the broadest scope of the claims of this application (now or later related to this application). In addition, if the explanations, definitions, and / or use of terms in the accompanying materials of this application are inconsistent or inconsistent with the content set forth in this application, the explanations, definitions, and / or use of terms in this application shall control.

[0093] Finally, it should be understood that the embodiments described herein are merely illustrative of the principles of the embodiments of the present application. Other variations may be within the scope of the present application. Thus, by way of example, and not of limitation, alternative configurations of the embodiments of the present application may be considered consistent with the teachings of the present application. Thus, the embodiments of the present application are not limited to the embodiments expressly introduced and described herein. [Explanation of symbols]

[0094] 100, 200, 300 Sound Generator 110, 210, 310, 511, 512, 513, 710 Acoustic Unit 120, 220, 320, 510, 1210, 1300 Mounting material 111 Housing 112 Vibration member 113 Magnetic Circuit Structure 230, 330 Visible members 240, 340 Lower recess 610, 711 Housing 621 First hole 622 Second hole 623 Equivalent Sound Outlet 712 Acoustic Transducer 713 First Acoustic Cavity 714 Second Acoustic Cavity 715 First Sound Conductor 716 Second Sound Conductor 1110, 1120, 1130, 1140 Sound waves 1310 Connection Segment 1320 Lower concave segment 1321 Transition part 1322 Mounting part

Claims

1. A sound generating device, comprising: A diaphragm; a housing including a first sound guide hole and a second sound guide hole, the housing containing the vibration membrane, the first sound guide hole and the second sound guide hole being located on either side of the vibration membrane, when worn by a user, a distance between the first sound guide hole and the user's ear canal opening is smaller than a distance between the diaphragm and the user's ear canal opening, an included angle range between a connecting line connecting the first sound guide hole and the second sound guide hole and a connecting line connecting the center of gravity of the diaphragm and the user's ear canal opening is smaller than 45°, and a distance between the second sound guide hole and the user's ear canal opening is larger than a distance between the diaphragm and the user's ear canal opening, the sound generating device further includes a magnetic circuit structure, the magnetic circuit structure is connected to the housing, the diaphragm is connected to the magnetic circuit structure by a voice coil, the housing and the magnetic circuit structure form a second acoustic cavity for radiating sound, the second acoustic cavity is acoustically coupled to the second sound guide hole, and the second sound guide hole is located on a side wall corresponding to the second acoustic cavity, The magnetic circuit structure of the sound generating device includes a magnetic flux conducting cover, the magnetic flux conducting cover is separated from the vibration membrane, a part of the magnetic flux conducting cover is used as one side wall of the housing, and the second sound guiding hole is located in the magnetic flux conducting cover; the first sound guide hole is provided in a side wall of the housing, An acoustic generating device, characterized in that the magnetic flux conducting cover in which the second sound guiding hole is provided is different from and perpendicular to the side wall of the housing in which the first sound guiding hole is provided.

2. 2. The sound generating device according to claim 1, wherein a distance between the first sound guide hole and the user's ear canal is 0.5 cm to 2.5 cm.

3. 3. The sound generating device according to claim 1, wherein a distance between the second sound guide hole and the user's ear canal is 1.5 cm to 5 cm.

4. 4. The sound generating device according to claim 1, wherein the distance between the vibration membrane and the user's ear canal is 1.5 cm to 3 cm.

5. The sound generating device according to any one of claims 1 to 4, characterized in that the ratio of the distance between the diaphragm and the user's ear canal opening to the distance between the first sound guide hole and the user's ear canal opening is 1.4 to 3.

6. The sound generating device according to any one of claims 1 to 5, characterized in that the ratio of the distance between the second sound guide hole and the user's ear canal opening to the distance between the first sound guide hole and the user's ear canal opening is 1.4 to 5.

7. An acoustic generating device according to any one of claims 1 to 6, characterized in that the ratio of the difference between the effective area of ​​the second sound guide hole and the effective area of ​​the first sound guide hole to the effective area of ​​the first sound guide hole or the effective area of ​​the second sound guide hole is 40% or less.

8. An acoustic generating device as described in any one of claims 1 to 7, comprising a mounting member including a connection segment and a downward concave segment connected to the connection segment, the downward concave segment causing an upper edge of the mounting member to have a downwardly concave recess in the mounting member, and the housing is connected to the downward concave segment.

9. The sound generating device described in claim 8, characterized in that the downward concave segment is positioned so as to be adjacent to the user's ear when the user is wearing the wearing member, and the downward concave segment positions the first sound guide hole near the user's ear.

10. 10. The sound generating device of claim 9, wherein the downward concave segment includes an attachment portion and a transition portion connected at an angle, the housing is installed on the attachment portion or the transition portion, and the transition portion is bent and connected to the connection segment and extends downward.

11. The acoustic generating device according to any one of claims 8 to 10, characterized in that the first sound guide hole is provided at at least one of an inner side of the downward concave segment facing the user's head, an edge of the downward concave segment facing the user's tragus, and a side of the downward concave segment facing the user's tragus.

12. The sound generating device according to any one of claims 8 to 10, wherein the wearing member includes a left ear wearing portion and a right ear wearing portion that are respectively hung over the left ear and the right ear of the user.

13. The housing includes a protrusion protruding outwardly from a side wall of the housing, the magnetic flux conducting cover is used as the side wall or a part of the side wall of the housing on which the protrusion is arranged, The sound generating device according to claim 1 , wherein the second acoustic cavity is formed between a rear surface of the diaphragm and the protrusion.

14. The sound generating device further includes a second sound guide hole disposed in the protrusion, 14. The sound generating device of claim 13, wherein the sound generated on the rear surface of the diaphragm is transmitted to the second acoustic cavity through an opening on the magnetic flux conducting cover, and then transmitted to the external environment through the second sound conducting hole on the protrusion.

15. An acoustic generating device as described in claim 14, characterized in that the orientation of the second sound guide hole on the magnetic flux conducting cover is different from the orientation of the second sound guide hole on the protrusion portion.

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