A sound production device

Abstract

The application provides a sound production device, which comprises a diaphragm and a shell, the shell comprises a first sound guide hole and a second sound guide hole, the diaphragm is in the shell, and the first sound guide hole and the second sound guide hole are respectively located on two sides of the diaphragm; when a user wears the sound production device, the distance between the first sound guide hole and the user's ear canal opening is less than the distance between the diaphragm and the user's ear canal opening, the included angle between the line connecting the first sound guide hole and the second sound guide hole and the line connecting the center of mass of the diaphragm and the user's ear canal opening is less 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.

Description

[0001] Priority information

[0002] This application claims priority to International Application No. PCT / CN2020 / 140815, filed on December 29, 2020, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of audio equipment technology, and in particular to a sound-generating device. Background Technology

[0004] Open-back audio devices offer advantages over traditional in-ear headphones, including not blocking the ears, safety, and comfort. Combining open-back audio devices with wearable devices (e.g., glasses, VR) allows the wearable device's structure (e.g., glasses temples) to serve as a structural support for the audio device. Furthermore, the audio device can compensate for the limited functionality of traditional wearable devices. For instance, combining audio devices with wearable devices designed for specific scenarios (e.g., cycling glasses, running glasses) can greatly enhance the enjoyment of exercise, while the open-back design of the audio device also ensures safety during activity. However, combining audio devices with wearable devices increases the weight of the wearable device, and interference between the audio device and the ear (e.g., blocking the ear canal) can negatively impact the user's wearing experience.

[0005] In view of the above problems, this application provides a sound-generating device that has a better wearing experience, better listening effect and reduced sound leakage. Summary of the Invention

[0006] This application provides a sound-generating device, which includes a diaphragm and a housing. The housing includes a first sound guide hole and a second sound guide hole. The diaphragm is located inside the housing, and the first sound guide hole and the second sound guide hole are located on opposite sides of the diaphragm. When a user wears the sound-generating device, the distance between the first sound guide hole and the user's ear canal opening is less than the distance between the diaphragm and the user's ear canal opening. The angle between the line connecting the first sound guide hole and the second sound guide hole and the line connecting the centroid of the diaphragm and the user's ear canal opening is less than 45°. 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.

[0007] In some embodiments, the distance between the first sound guide hole and the user's ear canal opening is 0.5cm-2.5cm.

[0008] In some embodiments, the distance between the second sound guide hole and the user's ear canal opening is 1.5cm-5cm.

[0009] In some embodiments, the distance between the diaphragm and the user's ear canal opening is 1.5cm-3cm.

[0010] In some embodiments, 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 1.4-3.

[0011] In some embodiments, 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 1.4-5.

[0012] In some embodiments, the housing and the diaphragm form a first acoustic chamber for radiating sound, the first acoustic chamber being acoustically coupled to the first sound guide hole, the first sound guide hole being located at different sidewalls of the housing corresponding to the first acoustic chamber.

[0013] In some embodiments, the first acoustic guide hole includes a first hole portion and a second hole portion, the first hole portion and the second hole portion being connected, wherein the first hole portion and the second hole portion are located at different side walls of the housing corresponding to the first acoustic chamber.

[0014] In some embodiments, the length of the sidewall containing the first hole is greater than the length of the sidewall containing the second hole.

[0015] In some embodiments, the ratio of the length of the second hole to the length of the sidewall in which it is located ranges from 1 / 6 to 2 / 3.

[0016] In some embodiments, the length of the second hole is not less than 1 / 6 of the length of the sidewall in which it is located.

[0017] In some embodiments, the sound-generating device further includes a magnetic circuit structure connected to the housing, the diaphragm connected to the magnetic circuit structure via a voice coil, the housing and the magnetic circuit structure forming a second acoustic chamber for radiating sound, the second acoustic chamber being acoustically coupled to a second sound guide hole, the second sound guide hole being located on the side wall corresponding to the second acoustic chamber.

[0018] In some embodiments, the magnetic circuit structure of the sound-generating device includes a magnetic shield that is away from the diaphragm, a portion of the magnetic shield serving as a sidewall of the housing, and the second sound guide hole being located on the magnetic shield.

[0019] 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 not greater than 40%.

[0020] In some embodiments, the sound-generating device includes a wearable member comprising: a connecting section and a recessed section, the recessed section being connected to the connecting section; wherein the recessed section causes a downward indentation at the upper edge of the wearable member; and the housing is connected to the recessed section.

[0021] In some embodiments, the recessed section is configured to be close to the user's ear when the user wears the device, and the recessed section places the first sound guide hole near the user's ear.

[0022] In some embodiments, the recessed section includes an angled mounting portion and a transition portion, the housing is disposed on the mounting portion or the transition portion, and the transition portion and the mounting portion are bent and connected to the connecting section and extend downward.

[0023] In some embodiments, the angle ranges from 15° to 150°.

[0024] In some embodiments, the connecting segment includes a first connecting segment, the transition portion is connected between the mounting portion and the first connecting segment, and the transition portion is bent and connected to the first connecting segment and extends downward.

[0025] In some embodiments, the connecting segment further includes a second connecting segment, which is connected to one end of the mounting portion.

[0026] In some embodiments, the first sound guide hole is disposed at at least one of the following locations: the inner side of the concave section facing the user's head, the edge of the concave section facing the user's tragus, or the side of the concave section facing the user's tragus.

[0027] In some embodiments, the wearable device includes a left ear wearing part and a right ear wearing part, which are respectively used to be mounted on the user's left and right ears. Attached Figure Description

[0028] Figure 1 This is an exemplary frame diagram of a sound-generating device according to some embodiments of this application;

[0029] Figure 2 This is a schematic diagram of the structure of a sound-generating device according to some embodiments of this application;

[0030] Figure 3 This is a schematic diagram of the structure of another sound-generating device according to some embodiments of this application;

[0031] Figure 4 This is a sound pressure level diagram of an acoustic unit at different locations according to some embodiments of this application;

[0032] Figure 5This is a schematic diagram showing the distribution of acoustic units at different locations according to some embodiments of this application;

[0033] Figure 6 This is a schematic diagram of the structure of an acoustic unit according to some embodiments of this application;

[0034] Figure 7 These are schematic diagrams of the structures of different acoustic units shown in some embodiments of this application;

[0035] Figure 8 These are frequency response curves of different acoustic units shown in some embodiments of this application;

[0036] Figure 9 This is a schematic diagram showing the distribution of different acoustic units at the ear according to some embodiments of this application;

[0037] Figure 10A This is a radiation directivity diagram of an acoustic unit shown in some embodiments of this application;

[0038] Figure 10B This is a radiation directivity diagram of an acoustic unit shown in some embodiments of this application;

[0039] Figure 11 This is an exemplary schematic diagram of a dipole with respect to facial reflection, as shown in some embodiments of this application;

[0040] Figure 12 This is a schematic diagram of the structure of a sound-generating device according to some embodiments of this application;

[0041] Figure 13 This is a schematic diagram of the structure of a wearable device according to some embodiments of this application;

[0042] Figure 14A These are schematic diagrams of the wearable device according to some embodiments of this application;

[0043] Figure 14B This is a schematic diagram of the structure of the wearable device from another perspective, according to some embodiments of this application;

[0044] Figure 15 This is a schematic diagram of the structure of a wearable device according to some embodiments of this application;

[0045] Figure 16 This is a schematic diagram of the structure of another wearable device according to some embodiments of this application;

[0046] Figure 17 This is a schematic diagram of the structure of the acoustic unit shown in some embodiments of this application. Detailed Implementation

[0047] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0048] It should be understood that the terms "system," "device," "unit," and / or "module" used herein are a method of distinguishing different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they may be replaced by other expressions.

[0049] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not specifically singular and may include plural forms. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0050] This specification describes a sound-generating device. 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 inside the housing, and the first and second sound guide holes are located on opposite sides of the diaphragm. When a user wears the sound-generating device, the distance between the first sound guide hole and the user's ear canal opening is less 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 greater than the distance between the diaphragm and the user's ear canal opening. This allows the first sound guide hole to be close to the user's ear canal opening, and the second sound guide hole to face away from the user's ear canal opening. The sound output from the first sound guide hole and the sound output from the second sound guide hole satisfy specific conditions (e.g., a phase difference of approximately 180°), which can form a dipole-like radiation. In the far field, the sound output from the first sound guide hole and the sound output from the second sound guide hole can cancel each other out of phase, thereby reducing the sound leakage volume of the sound-generating device in the far field and preventing the sound output of the sound-generating device from being heard by nearby people. In some embodiments, the angle between the line connecting the first and second sound guide holes and the line connecting the diaphragm's centroid and the user's ear canal opening is less than 45°. When a user wears the sound-generating device, the angle between the line connecting the first and second sound guide holes and the line connecting the diaphragm's center of mass and the user's ear canal opening is a specific angle (e.g., less than 45°). The direction of the dipole-like radiation formed by the sound output from the first and second sound guide holes points towards the user's ear canal, thereby increasing the listening volume and reducing far-field sound leakage when the user wears the sound-generating device. In some embodiments, when the sound-generating device is a wearable device with audio functionality (e.g., glasses, smart helmets, etc.), on the one hand, 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 wearing experience; on the other hand, the acoustic performance and sound leakage can also be guaranteed and reduced by the arrangement of the first and second sound guide holes.

[0051] Figure 1 This is an exemplary frame diagram of a sound-generating device according to some embodiments of this application. For example... Figure 1 As shown, the sound-generating device 100 may include an acoustic unit 110 and a wearable component 120.

[0052] In some embodiments, the sound-generating device 100 may include glasses, smart bracelets, headphones, hearing aids, smart helmets, smartwatches, smart clothing, smart backpacks, smart accessories, etc., or any combination thereof. For example, the sound-generating device 100 may be functional nearsighted glasses, reading glasses, cycling glasses, or sunglasses, or it may be intelligent glasses, such as audio glasses with headphone functionality. The sound-generating device 100 may also be a head-mounted device such as a helmet, augmented reality (AR) device, or 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, virtual reality devices and / or augmented reality devices may include Google Glass, Oculus Rift, HoloLens, Gear VR, etc.

[0053] The acoustic unit 110 can be used to convert a signal containing sound information into a sound signal. In some embodiments, the sound signal may include bone conduction sound waves or air conduction sound waves. For example, the acoustic unit 110 may generate mechanical vibrations in response to receiving a signal containing sound information to output sound waves (i.e., a sound signal). For example, when the acoustic unit 110 is an air conduction loudspeaker, the acoustic unit 110 may include a housing 111, a vibrating element 112, and a magnetic circuit structure 113, the vibrating element 112 and the magnetic circuit structure 113 being housed in the housing 111, and the vibrating element 112 and the magnetic circuit structure 113 being connected by a voice coil ( Figure 1(Not shown in the diagram) The acoustic unit 110 is connected to a diaphragm (the vibrating element 112). The internal magnetic field of the magnetic circuit structure 113 changes in response to a sound-containing signal (i.e., an electrical signal). The voice coil vibrates under the action of the magnetic circuit structure 113, and the vibrating element 112 (diaphragm) vibrates in response to the vibration of the voice coil. The vibrating element 112 drives the air inside the housing 111 to vibrate, thereby generating sound waves. In some embodiments, the acoustic unit 110 may also include one or more sound guide holes, through which the sound waves generated at the vibrating element 112 can be radiated to the outside. For example, when the acoustic unit 110 is a bone conduction speaker, the acoustic unit 110 may include the vibrating element 112 and / or a transmission element connected to the vibrating element 112 (e.g., at least part of the housing of the wearable member 120 in the sound-generating device 100). When the acoustic unit 110 generates mechanical vibration, it is accompanied by energy conversion. The acoustic unit 110 can realize the conversion of a signal containing sound information into mechanical vibration, which can be transmitted to the user's auditory nerve through bone conduction via the transmission element. It should be noted that when the acoustic unit 110 is a bone conduction speaker, it can generate air conduction sound waves while outputting mechanical vibrations (i.e., bone conduction sound waves). This conversion process may involve the coexistence and conversion of multiple different types of energy. For example, an electrical signal (i.e., a signal containing sound information) can be directly converted into mechanical vibrations through the vibrating element 112 of the acoustic unit 110, and these mechanical vibrations are then transmitted through the transmission element to transmit sound waves. As another example, sound information can be contained in an optical signal, and a specific acoustic unit 110 can realize the process of converting an optical signal into a sound signal. Other types of energy that can coexist and be converted during the operation of the acoustic unit 110 include thermal energy and magnetic field energy. In some embodiments, the acoustic unit 110 may include one or more of the following: moving coil, electrostatic, piezoelectric, moving iron, pneumatic, and electromagnetic.

[0054] 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. In some embodiments, the acoustic unit 110 may be disposed at the wearer 120 to transmit emitted sound to the user. In some embodiments, the acoustic unit 110 may be disposed at the end of the wearer 120 or at any other location. For example, the acoustic unit 110 may be disposed at the end of the wearer 120, while no acoustic unit 110 is disposed at other locations on the wearer 120. In some embodiments, multiple acoustic units 110 may be disposed at multiple locations on the wearer 120. For example, at least one acoustic unit 110 may be disposed at the end of the wearer 120 or at other locations. In some embodiments, the acoustic unit 110 may be disposed on the outer surface of the wearer 120 or inside the wearer 120. For example, the acoustic unit 110 may be disposed near the location where the wearer 120 contacts the user (e.g., near the temple to the ear on the wearer 120). For example, the wearable device 120 may include a cavity for housing the acoustic unit 110, in which at least a portion of the acoustic unit 110 may be housed. Another example is that the acoustic unit 110 and the wearable device 120 are an integral structure.

[0055] In some embodiments, the sound-generating device 100 may further include a visual element ( Figure 1 (Not shown in the image). The viewing element is used to be mounted on a part of the user's body, such as the eyes, hands, etc. The wearing element 120 can be connected to one or both ends of the viewing element to maintain stable contact between the sound-emitting device 100 and the user. In some embodiments, the viewing element can be a lens, a display screen, or a display screen that functions as a lens. In some embodiments, the viewing element can also be a lens and its auxiliary components or a display screen and its auxiliary components, which can be components such as a frame or a bracket. In some embodiments, the viewing element can also be an auxiliary component that does not contain a lens or a display screen.

[0056] In some embodiments, the wearing component 120 may be a temple or headband, etc. For example, if the wearing component 120 is a temple, the sound-generating device 100 may include a viewing element and two wearing components 120, with the two wearing components 120 respectively connected to both ends of the viewing element and used to be mounted on the corresponding left and right ears. As another example, if the wearing component 120 is a headband, the headband can be adjusted to fit the user's head shape and may also have various functional components. In this case, the sound-generating device 100 includes a viewing element and a wearing component 120, with both ends of the wearing component 120 respectively connected to both ends of the viewing element. It should be noted that the structure of the wearing component 120 can be adaptively adjusted according to the type of sound-generating device 100 or specific application scenarios.

[0057] It should be understood that, Figure 1 The provided framework diagrams are for illustrative purposes only and are not intended to limit the scope of this application. Various modifications and variations can be made by those skilled in the art based on the guidance of this application, and all such modifications and variations will fall within the scope of protection of the application. In some embodiments, the number of elements shown in the figures can be adjusted according to actual circumstances. In some embodiments, Figure 1 One or more elements shown may be omitted, or one or more other elements may be added or removed. For example, the sound-generating device 100 may not include the wearing member 120, and the housing 111 may have the wearing function of the wearing member 120. In some embodiments, an element may be replaced by another element that can perform a similar function. In some embodiments, an element may be split into multiple sub-elements, or multiple elements may be combined into a single element. For example, the housing 111 and the wearing member 120 may be combined into a single element.

[0058] To further describe the sound-generating device, the following is an exemplary description of the sound-generating device. Figure 2 This is a schematic diagram of the structure of a sound-generating device according to some embodiments of this application. Figure 2 The sound-generating device 200 shown is a VR or AR device, such as... Figure 2 As shown, the sound-generating device 200 may include an acoustic unit 210, a wearing component 220, and a viewing component 230. In some embodiments, the wearing component 220 is a headband-like component, which may be a structure made of an elastic material or an adjustable length structure. Both ends of the wearing component 220 are connected to both ends of the viewing component 230. When a user wears the sound-generating device 200, the wearing component 220 and the viewing component 230 surround the user's head, and the pressure exerted on the user's head by the wearing component 220 and the viewing component 230 enables the sound-generating device 200 to be worn. In some embodiments, the connection method between the wearing component 220 and the viewing component 230 may include, but is not limited to, a rotatable connection or a telescopic connection, or a relatively fixed connection method such as a snap-fit, screw connection, or integral molding connection.

[0059] In some embodiments, the wearable device 220 may include a recess 240 for placing the acoustic unit 210. When the user wears the sound-emitting device 200, the recess 240 may be located near the user's ear (e.g., in front, above, etc.), thus allowing the acoustic unit 210 to be positioned close to the user's ear without blocking the user's ear canal opening, enabling the user to hear sounds from the external environment while listening to the sound emitted by the acoustic unit 210. In some embodiments, the acoustic unit 210 may be located on the outer surface of the recess 240. For example, when the acoustic unit 210 is a bone conduction speaker, the acoustic unit 210 may be located on the side of the recess 240 that contacts the user. Alternatively, when the acoustic unit 210 is an air conduction speaker, the acoustic unit 210 may be located on the side of the recess 240 that does not contact the user. In some embodiments, the acoustic unit 210 may be located inside the recess 240. For example, the recess 240 may have a accommodating chamber for placing the acoustic unit 210. Figure 2 (Not shown in the image), the acoustic unit 210 can be located in the receiving chamber. When the acoustic unit 210 is located in the receiving chamber, the recess 240 can serve as the housing of the acoustic unit 210, and other components of the acoustic unit 210 (e.g., magnetic circuit structure, diaphragm, etc.) can be located in the recess 240. Taking an air-conducting loudspeaker as an example of the acoustic unit 210, in some embodiments, the acoustic unit 210 may include a diaphragm and a magnetic circuit structure (not shown in the image). Figure 2 (Not shown in the image), the diaphragm and magnetic circuit structure are connected via a voice coil. The magnetic circuit structure is connected to the housing (or recess 240) of the acoustic unit 210. The side of the diaphragm facing away from the magnetic circuit structure forms the front of the acoustic unit 210, and the side of the magnetic circuit structure facing away from the diaphragm forms the back of the acoustic unit 210. The vibration of the diaphragm causes the acoustic unit to radiate sound outward from its front and back sides, respectively. 40 In some embodiments, the housing (or recess 2) of the acoustic unit 210 may include at least two sound guide holes ( Figure 2(Not shown in the image), the sound guide hole may include a first sound guide hole (also referred to as a sound outlet) and a second sound guide hole (also referred to as a pressure relief port). The first sound guide hole is used to output the sound emitted from the front of the acoustic unit 210, and the second sound guide hole can be used to output the sound emitted from the back of the acoustic unit 220. 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 can be considered to be opposite, so that the sound output from the first sound guide hole and the sound output from the second sound guide hole can form 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 faces away from the user's ear canal opening, so that the acoustic unit 210 has a better acoustic output effect. In some embodiments, the number of the first sound guide hole and the second sound guide hole can be one or more. In some embodiments, the listening effect and sound leakage reduction effect of the sound-generating device 200 can be further improved by adjusting the number, size, position, acoustic impedance, and other parameters of the first or second sound guide hole. For detailed information about the first sound guide hole, the second sound guide hole, and the recess 240, please refer to other parts of this specification, such as Figures 4 to 11 And its related descriptions.

[0060] Figure 3 This is a schematic diagram of the structure of another sound-generating device according to some embodiments of this application. Figure 3 The sound-generating device 300 shown is a pair of glasses, such as... Figure 3 As shown, the sound-generating device 300 may include an acoustic unit 310, a wearing member 320, and a viewing member 330 (i.e., a frame or lens). In some embodiments, the wearing member 320 includes two temple structures, one end of which is connected to the end of the viewing member 330, and the two temple structures respectively cooperate with the user's left and right ears. When the user wears the sound-generating device 300, the wearing member 320 is supported by the user's ears, and the viewing member 330 is supported by the user's nose bridge, thus enabling the sound-generating device 300 to be worn. In some embodiments, the connection method between the wearing member 320 and the viewing member 330 may include, but is not limited to, a rotatable connection or a telescopic connection, or a relatively fixed connection method such as a snap-fit, screw connection, or integral molding connection. The structure of the acoustic unit 310 and... Figure 2 The structure of the acoustic unit 210 shown is similar to that of the recessed portion 340. Figure 2 The recessed portion 240 shown is similar and will not be described in detail here.

[0061] It should be noted that the above descriptions of the sound-generating devices 200 and 300 are for illustrative purposes only and do not limit the scope of this specification. Those skilled in the art can make various modifications and changes to the sound-generating devices 200 and 300 under the guidance of this specification. However, these modifications and changes are still within the scope of this specification. For example, the wearing component 220 of the sound-generating device 200 can be a temple structure, and the wearing component 320 of the sound-generating device 300 can be a headband-like component.

[0062] 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 to not affect the user's reception of external ambient sounds other than the acoustic unit, the acoustic unit may be located near the user's ear or at least part of the acoustic unit may be located in the projection area of ​​the user's ear on the face. Figure 4 This is a sound pressure level diagram of an acoustic unit at different positions according to some embodiments of this application. The diagram shows the influence of the actually tested sound wave (i.e., the sound output from the first sound guide hole of the acoustic unit) on the volume of sound heard at different positions in front of the ear. Figure 4 As shown in the illustration, the first sound guide hole of the acoustic unit is distributed in regions 1, 2, 3, 4, 5, 6, 7, 8, and 9 on the front side of the user's auricle. Figure 4 In the right-hand image, the lighter the grayscale color, the higher the sound pressure level perceived by the human ear when the first sound guide hole is located near that region. For example, when the first sound guide hole of the acoustic unit is located in region 9, the perceived sound volume is approximately 88 dB. As another example, when the first sound guide hole of the acoustic unit is located in region 6, the perceived sound volume is approximately 86 dB. And yet another example, when the first sound guide hole of the acoustic unit is located in region 7, the perceived sound volume is approximately 76 dB. Figure 4 It is known that when the first sound guide hole of the acoustic unit is placed near region 3, region 5, region 6, region 8, or region 9, a larger listening volume is achieved. Preferably, when the first sound guide hole of the acoustic unit is placed near region 5, region 6, region 8, or region 9, a larger volume can be ensured for the listener. More preferably, when the first sound guide hole of the acoustic unit is placed near region 6 or region 9, a larger volume can be ensured for the listener. In some embodiments, in order to ensure that the user can hear a larger volume when wearing the sound-generating device, the first sound guide hole (reference) Figure 7(a) The sound guide hole should be as close as possible to the user's ear canal opening. However, to ensure the ear canal opening remains 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 can refer to the distance between the center of the first sound guide hole and the center of the user's ear canal opening, or the distance between the center of the first sound guide hole and the plane containing the user's ear canal opening. In some embodiments, the distance between the first sound guide hole and the user's ear canal opening can be less than 4 cm. In some embodiments, the distance between the first sound guide hole and the user's ear canal opening can be less than 3 cm. In some embodiments, the distance between the first sound guide hole and the user's ear canal opening can range from 0.5 cm to 2.5 cm. In some embodiments, the distance between the first sound guide hole and the user's ear canal opening can range from 1 cm to 2 cm. The sound emitted by the diaphragm of the acoustic unit needs to be transmitted to the user's ear canal opening through an acoustic structure (e.g., acoustic chamber, sound guide tube, sound guide hole, etc.). In some embodiments, the sound-emitting device's listening effect can be improved by adjusting the distance between the diaphragm's center of mass and the user's ear canal opening. Here, the diaphragm's center of mass refers to the center of mass of the diaphragm. For example, the diaphragm has a circular structure, and the diaphragm centroid is the center of the circular diaphragm. Alternatively, the diaphragm may have a rectangular structure, and the diaphragm centroid is the geometric center of the rectangle. The ear canal opening refers to the opening of the external auditory canal. The distance between the diaphragm and the user's ear canal opening can refer to the distance between the center of the diaphragm centroid and the center of the user's ear canal opening. In other embodiments, the distance between the diaphragm and the user's ear canal opening can also refer to the distance between the diaphragm centroid and the plane containing the user's ear canal opening. In some embodiments, the distance between the diaphragm centroid and the user's ear canal opening can be less than 5 cm. In some embodiments, the distance between the diaphragm centroid and the user's ear canal opening can be less than 4 cm. In some embodiments, the distance between the diaphragm centroid and the user's ear canal opening can range from 1 cm to 4 cm. In some embodiments, the distance between the diaphragm centroid and the user's ear canal opening can range from 1.5 cm to 3.5 cm. In some embodiments, the distance between the diaphragm centroid and the user's ear canal opening can range from 2 cm to 3 cm. In some embodiments, the ratio between the distance between the diaphragm centroid and the user's ear canal opening and the distance between the first sound guide hole and the user's ear canal opening can be greater than 1.2. In some embodiments, the ratio between the distance of the diaphragm centroid to the user's ear canal opening and the distance between the first sound guide hole and the user's ear canal opening can range from 1.2 to 4. In some embodiments, the ratio between the distance of the diaphragm centroid to the user's ear canal opening and the distance between the first sound guide hole and the user's ear canal opening can range from 1.4 to 3. In some embodiments, the ratio between the distance of the diaphragm centroid to the user's ear canal opening and the distance between the first sound guide hole and the user's ear canal opening can range from 1.5 to 2. In some embodiments, the ratio between the distance of the diaphragm centroid to the user's ear canal opening and the distance between the first sound guide hole and the user's ear canal opening can range from 1.6 to 1.8.

[0063] Under the same sound source, the acoustic output effect of the acoustic unit can be affected at different locations near the user's ear. In some embodiments, the acoustic output effect of the acoustic unit in the sound-generating device can be improved by adjusting the position of the first sound guide hole in the acoustic unit. Figure 5 This is a schematic diagram showing the distribution of acoustic units at different locations according to some embodiments of this application specification.

[0064] like Figure 5 As shown in (a), the sound-generating device is eyeglasses. The device may include a wearing member 510 and an acoustic unit 511. The wearing member 510 has a temple structure, and the acoustic unit 511 has a cuboid structure. One longer side of the acoustic unit 511 is connected to the wearing member 510, and one shorter side of the acoustic unit 511 is approximately perpendicular to the wearing member 510. When the user wears the sound-generating device, the acoustic unit 511 can be located on the front side of the upper part of the auricle, with one shorter side of the acoustic unit 511 directly opposite the user's auricle. In some embodiments, the acoustic unit 511 may include a first sound guide hole (…). Figure 5 (a) Not shown), the first sound guide hole is used to output the sound generated by the front of the acoustic unit 511 to the outside. 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 user's ear canal opening. Here, the position of the first sound guide hole can be regarded as Figure 4 Near area 2 or area 3 shown.

[0065] Figure 5 (b) The sound-generating device and Figure 5 The sound-generating devices shown in (a) have roughly the same structure, the difference being that... Figure 5 (b) shows the acoustic unit 512 in the sound-generating device and Figure 5 (a) The acoustic unit 511 in the sound-generating device shown is connected to the temple structure at a different position. For example... Figure 5 As shown in (b), one shorter side of the acoustic unit 512 is connected to the wearer, and one longer side of the acoustic unit 512 is positioned approximately perpendicular to the wearer. When the user wears the sound-emitting device, the acoustic unit 512 can be located in front of the auricle, with one longer side of the acoustic unit 512 directly opposite the user's auricle. In some embodiments, the acoustic unit 512 may include a first sound guide hole (…). Figure 5 (b) Not shown in the diagram, the first sound guide hole is used to output the sound generated on the front of the acoustic unit 512 to the outside. 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 opening. The height of the user's ear canal opening is used as a reference plane. Figure 5 (b) shows the position of the first sound guide hole relative to Figure 5 (a) shows that the position of the first sound guide hole is lower, that is to say Figure 5 (b) shows the first sound guide hole positioned closer to the user's ear canal opening. Figure 5 The position of the first sound guide hole shown in (b) can be regarded as Figure 4 Near area 5 or area 8 shown.

[0066] Figure 5 (c) shows the sound-generating device and Figure 5 The sound-generating devices shown in (b) have roughly the same structure, the difference being that... Figure 5 (c) shows the acoustic unit 513 in the sound-generating device and Figure 5 (b) The acoustic unit 512 in the sound-generating device is connected to the temple structure at a different position. For example... Figure 5 As shown in (c), one shorter side of the acoustic unit 513 is connected to the wearer, and the longer side of the acoustic unit 513 is connected to the wearer at an angle (e.g., less than 90°), so that the first sound guide hole of the acoustic unit 513 is closer to the user's ear canal opening. When the user wears the sound-generating device, the acoustic unit 513 can be located on the front side of the auricle, wherein one longer side of the acoustic unit 513 is tilted towards the user's ear canal opening, so that the first sound guide hole of the acoustic unit 513 is closer to the user's ear canal opening. Here Figure 5 The position of the first sound guide hole shown in (b) can be regarded as Figure 4 Near area 6 or area 9 shown in the diagram.

[0067] Figure 6 This is a schematic diagram of the structure of an acoustic unit provided according to some embodiments of this application. For example... Figure 6 As shown, the acoustic unit includes a housing 610, which is used to support the diaphragm and magnetic circuit structure of the acoustic unit. Figure 6(Not shown in the image). The diaphragm and magnetic circuit structure are connected via a voice coil. The magnetic circuit structure is connected to the housing 610. The side of the diaphragm facing away from the magnetic circuit structure forms the front of the acoustic unit, and the side of the magnetic circuit structure facing away from the diaphragm forms the back of the acoustic unit. Diaphragm vibration causes the acoustic unit to radiate sound from both its front and back sides. In some embodiments, the housing 610 and the diaphragm form a first acoustic chamber for radiating sound. The first acoustic chamber is acoustically coupled to a first sound guide hole, which is located on different sidewalls of the housing corresponding to the first acoustic chamber. When the user wears the sound-generating device, the first sound guide hole is located near the user's ear canal opening. In some embodiments, the first sound guide hole may include a first aperture 621 and a second aperture 622, which are connected. The first aperture 621 and the second aperture 622 are located on different sidewalls of the housing corresponding to the first acoustic chamber. For example, the first aperture 621 and the second aperture 622 are located on two adjacent sidewalls of the housing corresponding to the first acoustic chamber. For example, the first hole 621 and the second hole 622 are located at two adjacent edges of the housing corresponding to the first acoustic chamber. In some embodiments, the length of the sidewall where the first hole 621 is located can be greater than the length of the sidewall where the second hole 622 is located. That is, the first hole 621 is located on the longer sidewall of the housing 610, and the second hole 622 is located on the shorter sidewall of the housing 610. When the acoustic unit is located in the wearable device (e.g., Figure 5 When wearing the device 510 as shown in (c), the first hole portion 621 and the second hole portion 622 of the first sound guide hole can be closer to the user's ear canal opening. For example, Figure 6 The first hole 621 and the second hole 622 shown are located at the lower right corner of the housing 610. When the user wears the sound-generating device, the acoustic unit can be positioned at... Figure 6As shown in the diagram, the acoustic unit is tilted at the front of the user's auricle. The first aperture 621 may contact other parts of the user's ear (e.g., the tragus), preventing it from directly facing the user's ear canal and affecting the user's auditory experience. To improve the acoustic output of the acoustic unit, a second aperture 622 is provided on the adjacent sidewall of the housing 610 containing the first aperture 621, allowing the first sound guide aperture to face the user's ear canal. For ease of understanding, the first aperture 621 and the second aperture 622 are considered as an equivalent sound outlet 623, which can be viewed as the area connecting the two ends of the first aperture 621 and the second aperture 622 with the greatest distance. When the acoustic unit is tilted, the equivalent sound outlet 623 can face the user's ear canal. In some embodiments, the acoustic unit may include at least one resonant frequency, which is positively correlated with the area of ​​the first sound guide aperture 620; that is, the larger the area of ​​the first sound guide aperture 620, the higher the resonant frequency. When an acoustic unit has a high resonant frequency, its frequency response curve is relatively flat in the frequency band below the resonant frequency. In this case, the acoustic unit exhibits better acoustic output over a wider frequency range. In this embodiment, a second hole 622 is provided on top of the first hole 621 in the acoustic unit. This allows the first sound guide hole to face the user's ear canal opening and also increases the area of ​​the first sound guide hole, thereby increasing the resonant frequency of the acoustic unit and improving its acoustic output.

[0068] The first aperture 621 serves as the main sound output part on the front of the acoustic unit. The length of the first aperture 621 can be relatively large. The larger the length of the first aperture 621, the higher the resonant frequency between the first acoustic chamber and the first sound guide hole of the acoustic unit, thereby enabling the acoustic unit to have better acoustic output performance over a wider frequency range. In some embodiments, the ratio of the length of the first aperture 621 to the length of the sidewall it is located is less than 0.9. In some embodiments, the ratio of the length of the first aperture 621 to the length of the sidewall it is located ranges from 0.3 to 0.8. In some embodiments, the ratio of the length of the first aperture 621 to the length of the sidewall it is located ranges from 0.4 to 0.8. In some embodiments, the ratio of the length of the first aperture 621 to the length of the sidewall it is located ranges from 0.5 to 0.7.

[0069] In some embodiments, the length of the second hole 622 is not less than 1 / 6 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 can be regular or irregular shapes such as rectangles, circles, triangles, ellipses, and semicircles.

[0070] It should be noted that the housing 610 of the acoustic unit is not limited to Figure 6 The cuboid structure shown can also be a cylinder, a trapezoidal structure, a triangular prism, or other regular or irregular structures. In some embodiments, the length of the sidewall where the first hole 621 is located can be the same as the length of the sidewall where the second hole 622 is located, or the length of the sidewall where the first hole 621 is located can be less than the length of the sidewall where the second hole 622 is located.

[0071] It should be understood that, Figure 6 The provided illustrations are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art can make various modifications and variations based on the guidance of this application. All such modifications and variations will fall within the scope of protection of this application. In some embodiments, the shape, size, position, or one or more features of the original components shown in the figures can be adjusted according to actual circumstances. For example, the length of the first hole 621 can be greater than, equal to, or less than the length of the second hole 622, or the cross-sectional area of ​​the first hole 621 can be greater than, equal to, or less than the cross-sectional area of ​​the second hole 622.

[0072] To further explain the acoustic unit, Figure 7 Several acoustic units are provided as examples for description. Figure 7 These are schematic diagrams of the structures of different acoustic units shown in some embodiments of this application.

[0073] like Figure 7As shown in (a), the acoustic unit 710 may include a housing 711 and an acoustic transducer 712. In some embodiments, the housing 711 may be a hollow cuboid structure. In other embodiments, the housing 711 may also be a cylinder, a trapezoidal structure, a triangular prism, or other regular or irregular structures. The acoustic transducer 712 is used to convert a signal containing sound information into a sound signal. In some embodiments, the acoustic transducer 712 may include a diaphragm and a magnetic circuit structure, which are connected by a voice coil. The magnetic circuit structure is connected to the housing 711. The internal magnetic field of the magnetic circuit structure changes in response to the sound-containing signal (i.e., an electrical signal). The voice coil vibrates under the action of the magnetic circuit structure, and the diaphragm vibrates in response to the vibration of the voice coil. The diaphragm drives the air inside the housing 711 to vibrate, thereby generating sound waves. In some embodiments, the side of the diaphragm of the acoustic transducer 712 facing 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. The diaphragm vibrates to radiate sound from its front and back sides, respectively. In some embodiments, the housing 711 and the diaphragm form a first acoustic chamber 713 for radiating sound, and the housing 711 and the magnetic circuit structure form a second acoustic chamber 714 for radiating sound. In some embodiments, the acoustic unit 710 may further include a first sound guide hole 715, which is used to output the sound generated by the front side of the diaphragm toward the user's ear canal. The first sound guide hole 715 is acoustically coupled to the first acoustic chamber 713. Specifically, the first sound guide hole 715 is located on the side wall of the housing 711 where the first acoustic chamber 713 is located. In some embodiments, the first sound guide hole 715 may include a first hole portion 7151 and a second hole portion 7152, wherein the first hole portion 7151 is located at different side walls of the housing 711 corresponding to the first acoustic chamber 713. In some embodiments, the length of the sidewall where the first hole 7151 is located is greater than the length of the sidewall where the second hole 7152 is located; that is, the first hole 7151 is located on the sidewall of the housing 711 with a longer length, and the second hole 7152 is located on the sidewall of the housing 711 with a shorter length. When the acoustic unit 710 is located on the wearer (e.g., Figure 5 When the wearer 510 shown is used, the first hole 7151 and the second hole 7152 can be positioned closer to the user's ear canal opening. For example, Figure 7(a) The first hole 7151 and the second hole 7152 shown are located at the lower right corner of the housing 711. When the user wears the sound-generating device, the acoustic unit 710 may be positioned in front of the user's auricle. In this case, the acoustic unit 710 is tilted, and the first hole 7151 may come into contact with other parts of the user's ear (e.g., the tragus). The first hole 7151 cannot face the user's ear canal opening, affecting the user's auditory experience. To improve the acoustic output of the acoustic unit 710, by providing the second hole 7152 on the adjacent sidewall of the housing 711 where the first hole 7151 is located, the first sound guide hole 715 can be better positioned facing the user's ear canal opening. For details regarding the first hole 7151 and the second hole 7152, please refer to this specification. Figure 6 The details and related descriptions will not be elaborated here.

[0074] To reduce sound leakage from the acoustic unit 710, in some embodiments, the acoustic unit 710 may further include a second sound guide 716, which is used to transmit sound emitted from the back of the diaphragm to the external environment. In some embodiments, the second sound guide 716 is located on a side wall of the housing 711 corresponding to the second acoustic chamber 714, and the second sound guide 716 is acoustically coupled to the second acoustic chamber 714. In some embodiments, the second sound guide 716 is arranged opposite to the first sound guide 715. This "opposite arrangement" can be understood as the second sound guide 716 and the first sound guide 715 having opposite opening orientations, or can be approximately considered as opposite. For example, the first sound guide hole 715 is located on the first and second sidewalls of the housing 711. The first and second sidewalls are two adjacent sidewalls in the housing 711. The first hole portion 7151 of the first sound guide hole 715 is located on the first sidewall, and the second hole portion 7152 of the first sound guide hole 715 is located on the second sidewall. The first hole portion 7151 and the second hole portion 7152 are connected and acoustically coupled to the first acoustic chamber 713. The second sound guide hole 716 is located on the third sidewall opposite to the second sidewall and acoustically coupled to the second acoustic chamber 714. When the user wears the sound-generating device, the first hole portion 7151 and the second hole portion 7152 of the first sound guide hole 715 face the user's ear canal opening, and the second sound guide hole 716 faces away from the user's ear canal opening. The sound output from the first sound guide 715 and the sound output from the second sound guide 716, meeting specific conditions (e.g., a phase difference of approximately 180°), can form a dipole-like radiation. In the far field, the sound output from the first sound guide 715 and the sound output from the second sound guide 716 can cancel each other out of phase, thereby reducing the sound leakage volume of the acoustic unit 710 in the far field 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 715 and the user's ear canal opening is too small, the sound output from the second sound guide 715 near the user's ear canal opening will cancel out the sound output from the first sound guide 715. To ensure the listening volume at the user's ear canal opening and reduce the sound leakage volume in the far field, in some embodiments, the distance between the second sound guide 716 and the user's ear canal opening can be greater than 1 cm. Furthermore, if the distance between the first sound guide hole 715 and the second sound guide hole 716 is too large, or if the distance between the second sound guide hole 716 and the ear canal opening is too large, the sound-generating device will be too bulky, affecting the user's wearing experience. To ensure a comfortable wearing experience, in some embodiments, the distance between the second sound guide hole 716 and the user's ear canal opening is less than 8 cm. Preferably, the distance between the second sound guide hole 716 and the user's ear canal opening can be in the range of 1.5 cm to 7 cm. More preferably, the distance between the second sound guide hole 716 and the user's ear canal opening can be in the range of 1.5 cm to 5 cm. Most preferably, the distance between the second sound guide hole 716 and the user's ear canal opening can be in the range of 2 cm to 4.5 cm.More preferably, the distance between the second sound guide hole 716 and the user's ear canal opening can be in the range of 2.5cm-4cm. 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 of the sound-generating device in the far field, the ratio between 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 can be maximized. In some embodiments, the ratio between 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 can be greater than 1.2. In some embodiments, the ratio between 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 can be in the range of 1.2-8. In some embodiments, the ratio between 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 can be in the range of 1.2-7. In some embodiments, the ratio between the distance of the second sound guide hole 716 to the user's ear canal opening and the distance between the first sound guide hole 715 and the user's ear canal opening can range from 1.3 to 6. In some embodiments, the ratio between the distance of the second sound guide hole 716 to the user's ear canal opening and the distance between the first sound guide hole 715 and the user's ear canal opening can range from 1.4 to 5. In some embodiments, the ratio between the distance of the second sound guide hole 716 to the user's ear canal opening and the distance between the first sound guide hole 715 and the user's ear canal opening can range from 1.5 to 3. In some embodiments, the ratio between the distance of the second sound guide hole 716 to the user's ear canal opening and the distance between the first sound guide hole 715 and the user's ear canal opening can range from 1.5 to 2.5.

[0075] refer to Figure 6In some embodiments, by adjusting the angle θ formed by the line L connecting the first sound guide hole and the second sound guide hole 630 and the line M connecting the diaphragm centroid O and the user's ear canal opening, 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 towards the user's ear canal, thereby increasing the listening volume when the user wears the acoustic unit and reducing the far-field leakage volume. In addition, the diaphragm centroid O can be approximated as the center point of the diaphragm, and the process of adjusting the angle θ can be regarded as the acoustic unit rotating around the diaphragm centroid O as the rotation center. At this time, the line M connecting the diaphragm centroid O and the user's ear canal opening can be approximated as a straight line with a fixed position. By adjusting (e.g., reducing) the angle θ, the first hole portion 621 of the first sound guide hole can be tilted relative to the user's tragus, thereby reducing the area of ​​the first hole portion 621 directly opposite the user's tragus, thereby reducing the influence of the tragus on the sound output from the first hole portion 621. Furthermore, by adjusting the included angle θ, the second hole 622, adjacent to the first hole 621, can be brought closer to the user's ear canal opening, thereby increasing the user's listening volume. To reduce the influence of the user's tragus and ensure a higher listening volume in the user's ear canal, in some embodiments, the angle θ formed by the line L connecting the first and second sound guide holes 630 and the line M connecting the diaphragm's center of mass O and the user's ear canal opening can be less than 60°. To further reduce the influence of the user's tragus and increase the listening volume in the user's ear canal, in some embodiments, the angle θ formed by the line L connecting the first and second sound guide holes 630 and the line M connecting the diaphragm's center of mass O and the user's ear canal opening can be less than 45°. Preferably, the angle θ formed by the line L connecting the first and second sound guide holes 630 and the line M connecting the diaphragm's center of mass O and the user's ear canal opening can be less than 35°. More preferably, the angle θ formed by the line L connecting the first and second sound guide holes 630 and the line M connecting the diaphragm centroid O and the user's ear canal opening can be less than 20°. More preferably, the angle θ formed by the line L connecting the first and second sound guide holes 630 and the line M connecting the diaphragm centroid O and the user's ear canal opening can be less than 10°. In some embodiments, the smaller the angle θ formed by the line L connecting the first and second sound guide holes 630 and the line M connecting the diaphragm centroid O and the user's ear canal opening, the greater the distance difference between the first and second sound guide holes 630 and the user's ear canal opening. In this case, the degree to which the sound transmitted from the second sound guide hole 630 to the user's ear canal opening is superimposed and canceled out by the sound transmitted from the first sound guide hole to the user's ear canal opening, and the louder the volume heard by the user. To further improve the listening volume at the user's ear canal opening, 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 can also be adjusted. For details regarding the location and dimensions of the first hole 621 and the second hole 622, please refer to the above. Figure 6 The specific content.

[0076] It should be noted that the line connecting the first sound guide hole and the second sound guide hole 620 can be the line connecting the geometric centers of the two sound guide holes, or the connection between 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 corresponding to the second sound guide hole 630. Furthermore, the diaphragm can be set parallel, perpendicular, or tilted relative to the contact surface between the acoustic unit and the user's face, and can be adapted to the specific application scenario. For parameters regarding the first sound guide hole, the diaphragm's centroid, and the ear canal opening, please refer to descriptions elsewhere in this application specification, such as... Figure 4 And its related descriptions.

[0077] Figure 7 (b) is a schematic diagram of the structure of another acoustic unit provided according to some embodiments of this application. Figure 7 (b) shows the acoustic unit 720 and Figure 7 The acoustic unit 710 shown in (a) has a roughly the same structure, the difference being that... Figure 7 (b) The second sound guide hole 726 in the acoustic unit 720 shown in the diagram and Figure 7 (a) shows that the structure and distribution of the second sound guide hole 716 of the acoustic unit 710 are different. Figure 7 (b) The housing 721, acoustic transducer 722, first acoustic chamber 723, second acoustic chamber 724, and first sound guide 725 are respectively connected to Figure 7 The structures of the housing 711, acoustic transducer 712, first acoustic chamber 713, second acoustic chamber 714, and first sound guide 715 shown in (a) are similar and will not be described in detail here. Figure 7 As shown in (b), the second sound guide hole 726 may include a third hole portion 7261 and a second hole portion 7262, which are acoustically coupled to the second acoustic chamber 724 for outputting sound emitted from the back 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 reference) Figure 7 (a) The first hole 7151 is disposed opposite to the fourth hole 7262 and the second hole of the first sound guide hole 725 (see reference). Figure 7The second hole 7152 in (a) is disposed opposite to the first hole. Specifically, the third hole 7261 is located on the fourth sidewall opposite to the first sidewall where the first hole of the first sound guide 725 is located, and the fourth hole 7262 is located on the third sidewall opposite to the second sidewall where the second hole of the first sound guide 725 is located. When the user wears the sound-generating device, the first and second holes of the first sound guide 725 face the user's ear canal, and the third hole 7261 and the fourth hole 7262 of the second sound guide 726 face away from the user's ear canal. The sound output from the first sound guide 725 and the sound output from the second sound guide 726 satisfy specific conditions (e.g., a phase difference of approximately 180°) and can form a dipole-like radiation. In the far field, the sound output from the first sound guide 725 and the sound output from the second sound guide 726 can cancel each other out of phase, thereby reducing the sound leakage volume of the acoustic unit 720 in the far field and preventing the sound output of the acoustic unit 720 from being heard by nearby people.

[0078] Figure 7 (c) is a schematic diagram of the structure of another acoustic unit provided according to some embodiments of this application. Figure 7 (c) shows the acoustic unit 730 and Figure 7 The acoustic unit 710 shown in (a) has a roughly the same structure, the difference being that... Figure 7 (c) shows that the acoustic unit 730 does not have a second acoustic chamber. Figure 7 (c) The housing 731, acoustic transducer 732, first acoustic chamber 733, and first sound guide 735 are respectively connected to Figure 7 The structures of the housing 711, acoustic transducer 712, first acoustic chamber 713, and first sound guide 715 shown in (a) are similar and will not be described in detail here. Figure 7 As shown in (c), the acoustic unit 730 may include a housing 731 and an acoustic transducer 732. The magnetic circuit structure of the acoustic transducer 732 may include a magnetically conductive cover. Figure 7(c) Not shown, the magnetic shield faces away from the diaphragm, and part of the magnetic shield structure serves as a sidewall of the acoustic unit's housing. This can be understood as the magnetic shield being a sidewall of the housing 731. In some embodiments, the acoustic unit 730 may include one or more second sound guide holes 736, wherein the second sound guide holes 736 may be located on the magnetic shield. In some embodiments, the shape of the second sound guide hole 736 may be a regular or irregular shape such as a circle, semicircle, ellipse, triangle, quadrilateral (e.g., rectangle), pentagon, etc. In some embodiments, when there are multiple second sound guide holes 736, the shapes of the second sound guide holes 736 may be the same or different. When a user wears the sound-generating device, the first and second openings of the first sound guide 735 face the user's ear canal, while the second sound guide 736 faces away from the user's face. The sound output from the first and second sound guides 735 and 736 can be approximated as being perpendicular to the face. The sound output from the first and second sound guides 735 and 736, reflected by the face (which can be approximated as a baffle), transforms the dipole into a quadrupole, thus producing a sound radiation pattern similar to that of a dipole. For details regarding the approximate back-to-back arrangement of the first and second sound guides 735 and 736 in the acoustic unit 730, please refer to descriptions elsewhere in the embodiments of this specification, for example... Figure 10A , Figure 10B , Figure 11 And its related descriptions.

[0079] Figure 7 (d) is a schematic diagram of the structure of another acoustic unit provided according to some embodiments of this application. Figure 7 (d) shows the acoustic unit 740 and Figure 7 The acoustic unit 710 shown in (a) has a roughly the same structure, the difference being that... Figure 7 (d) shows the second sound guide hole 746 in the acoustic unit 720 and Figure 7 (a) shows that the structure and distribution of the second sound guide hole 716 of the acoustic unit 710 are different. Figure 7 (d) The housing 741, acoustic transducer 742, first acoustic chamber 743, second acoustic chamber 744, and first sound guide 745 are respectively connected to Figure 7 The structures of the housing 711, acoustic transducer 712, first acoustic chamber 713, second acoustic chamber 714, and first sound guide 715 shown in (a) are similar and will not be described in detail here. Figure 7As shown in (d), the second sound guide hole 746 is located on the side wall of the housing 741, which is directly opposite to the magnetic plate. The second sound guide hole 746 is acoustically coupled to the second acoustic chamber 744 and is used to output the sound emitted from the back of the acoustic unit 742. When the user wears the sound-emitting device, the first and second openings 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. The sound output from the first and second sound guide holes 745 is reflected by the face (which can be approximated as a baffle), transforming the dipole into a quadrupole, thereby producing a sound radiation pattern similar to that of a dipole.

[0080] To further explain Figure 7 The acoustic output effects of different acoustic units (e.g., acoustic unit 710, acoustic unit 720, and acoustic unit 730) are now combined with... Figure 8 Please provide a detailed explanation. Figure 8 These are frequency response curves of different acoustic units shown in some embodiments of this application. Figure 8 In the middle, the solid line (a) represents... Figure 7 The frequency response curve of acoustic unit 710 in (a) is shown, and the dashed line b represents... Figure 7 The frequency response curve of acoustic unit 720 in (b) is shown, and the dashed line c represents... Figure 7 The frequency response curve of acoustic unit 730 in (c). Figure 8 As shown, all three frequency response curves exhibit a resonance peak 810 near 4kHz. This resonance peak 810 is primarily caused by the first acoustic chamber (e.g., first acoustic chamber 713, first acoustic chamber 723, first acoustic chamber 733) and the first sound guide (e.g., first sound guide 715, first sound guide 725, first sound guide 735). Figure 7 (a) Figure 7 (b) Figure 7 In (c), the first acoustic chamber of the three acoustic units has the same structure as the first sound guide hole, and the resonance peaks of the three frequency response curves coincide at around 4kHz. Figure 7 In the acoustic unit 710 shown in (a), due to the structure of the second acoustic chamber 714 and the second sound guide 716, the corresponding frequency response curve a has a resonance peak 811 near 2.6 kHz. Figure 7 In the acoustic unit 720 shown in (b), due to the structure of the second acoustic chamber 724 and the second sound guide 726, the corresponding frequency response curve b has a resonance peak 812 near 3.2 kHz. Figure 7In the acoustic unit 730 shown in (c), since the acoustic unit 730 only has a second sound guide hole 736 and no second acoustic chamber, the resonant frequency of the resonance peak 813 in the corresponding frequency response curve c is relatively high, and the resonant frequency of the resonance peak 813 is around 7kHz. In summary, in a specific frequency band (e.g., 1000Hz-1000 Hz), when the acoustic unit does not have a second acoustic chamber, its frequency response curve is flatter and it has better acoustic output performance. In some embodiments, the resonant frequency corresponding to the resonance peaks (e.g., resonance peaks 811 and 812) caused by the second acoustic chamber can also be increased by reducing the volume of the second acoustic chamber.

[0081] In some embodiments, the first and second sound guide holes are arranged back-to-back or approximately back-to-back. When the user wears the sound-generating device, the line connecting the center of the first and second sound guide holes can point towards the user's ear canal opening. On one hand, the back-to-back or approximately back-to-back arrangement of the first and second sound guide holes, with the first sound guide hole closer to the user's ear canal opening, ensures that the acoustic unit provides the user with a larger listening volume. On the other hand, the fact that the second sound guide hole faces away from the user's ear canal opening prevents interference between the sound output from the first and second sound guide holes at the user's ear canal opening. Simultaneously, the sound output from the first and second sound guide holes can be approximated as forming dipoles, canceling each other out in the far field. The following is combined with... Figure 9 An illustrative explanation is provided regarding the positional relationship between the first sound guide hole, the second sound guide hole, and the user's ear canal opening.

[0082] It should be noted that the foregoing one or more embodiments are for illustrative purposes only and are not intended to limit the structure and shape of the acoustic unit. After fully understanding the principle of the acoustic unit, it can be modified to obtain an acoustic unit different from the embodiments of this application. For example, part of the second sound guide hole of the acoustic unit can be located at the side wall corresponding to the second acoustic chamber, and another part can be located at the magnetic shield of the magnetic circuit structure.

[0083] Figure 9 This is a schematic diagram showing the distribution of different acoustic units at the ear according to some embodiments of this application. Figure 9 The acoustic units in Figures (a), (b), (c), and (d) can respectively correspond to Figure 7 Figures (a), (b), (c), and (d) in the image are shown. Figure 9As shown in (a), 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 opening, while the second sound guide hole 716 faces away from the user's ear canal opening. The line connecting the center of the first sound guide hole 715 and the center of the second sound guide hole 716 points towards the user's ear canal opening. This can be understood as the center of the first sound guide hole 715, the center of the second sound guide hole 716, and the user's ear canal opening being essentially on the same straight line. It should be noted that the center of the sound guide hole here can refer to the geometric center of the sound guide hole or the geometric center of an equivalent sound guide hole. For example, in... Figure 9 In (a), the equivalent sound guide hole of the first sound guide hole 715 can be considered as the region connecting the two ends of the first hole portion 7151 and the second hole portion 7152 where the distance is greatest. Here, the center of the first sound guide hole 715 can 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. For example, in... Figure 9 In (b), the center of the first sound guide 725 can be the geometric center of the equivalent sound guide. The second sound guide 726 includes a third hole portion and a fourth hole portion. The equivalent sound guide of the second sound guide 726 can be considered as the region connecting the two ends of the third hole portion and the fourth hole portion with the largest distance. Here, the center of the second sound guide 726 can be the center of the equivalent sound guide. For example, in... Figure 9 In (c), the center of the first sound guide 735 is the center of the equivalent sound guide. The second sound guide 736 includes multiple sub-sound guides, and the center of the second sound guide 736 can be the geometric center of the multiple sub-sound guides. For example, in... Figure 9 In (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.

[0084] Figure 10A Based on Figure 7 (b) Radiation directivity diagram of the acoustic unit when the first and second sound guide holes are set back from each other. Figure 10A As shown, the radiation directivity pattern approximates a figure-eight shape, where the direction of the main lobe of the figure-eight corresponds to... Figure 9 The connecting lines in (b) (see here) Figure 10A The direction indicated by the dotted line represents the sound pressure level. Darker colors indicate higher sound pressure levels. When a user wears the sound-generating device, their ear is positioned within the figure-eight-shaped main lobe region (e.g., main lobe region 1010, main lobe region 1020). The sound pressure level heard at this location is the highest. Conversely, the sound pressure level perpendicular to the main lobe is relatively lower. Since the space perpendicular to the main lobe faces outwards, it effectively reduces sound leakage and ensures a degree of privacy.

[0085] Figure 10B Based on Figure 7 (c) does not include the radiation directivity diagram of the acoustic unit of the second acoustic chamber. Figure 10B Compared to Figure 10A Its radiation directivity pattern and Figure 7 (b) The radiation directivity patterns of the acoustic unit openings facing away from each other are roughly the same. Therefore, structurally speaking, Figure 7 (c) The first sound guide hole 715 and the second sound guide hole 716 are not set back from each other, but due to the existence of boundary conditions (e.g., human face), the sound output from the first sound guide hole 715 and the sound output from the second sound guide hole 716 are acoustically considered to be approximately back from each other.

[0086] To facilitate understanding of boundary conditions, this section combines... Figure 11 Please provide an explanation. Figure 11 This is an exemplary schematic diagram of a dipole emitting light from a face, according to some embodiments of this application. For example... Figure 11 As shown, when a user wears the sound-generating device, the first sound guide hole of the acoustic unit faces the user's ear canal, and the second sound guide hole faces away from the user's face. Here, the sound output from the first sound guide hole is sound wave 1110, and the sound output from the second sound guide hole is sound wave 1120. Sound waves 1110 and 1120 can form a dipole-like radiation. The sound radiated by sound waves 1110 and 1120 to the outside can be approximated as being perpendicular to the face. Under the reflection of the user's face, sound waves 1110 and 1120 form sound waves 1130 and 1140, which are symmetrical to sound waves 1110 and 1120. The dipole formed by sound waves 1110 and 1120 becomes a quadrupole, thus producing a sound radiation pattern similar to that of a dipole.

[0087] To ensure that the sound radiation at the first and second sound guide holes is approximately the same, thus forming the aforementioned figure-eight 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 ​​either the first or second sound guide hole is no greater than 40%. In some embodiments, the ratio of the difference between the effective area of ​​the second and first sound guide holes to the effective area of ​​either the first or second sound guide hole is no greater than 30%. In some embodiments, the ratio of the difference between the effective area of ​​the second and first sound guide holes to the effective area of ​​either the first or second sound guide hole is no greater than 20%. In some embodiments, the ratio of the difference between the effective area of ​​the second and first sound guide holes to the effective area of ​​either the first or second sound guide hole is no greater than 20%. 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 can be defined as the product of its actual area and the porosity of the covering acoustic barrier, i.e., the area through which air can pass. For example, when the outlet end of the sound guide hole is covered with a sound-absorbing 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 sound-absorbing mesh. As another example, when the outlet end of the pressure relief hole is not covered with a sound-absorbing mesh, the effective area of ​​the sound guide hole is simply the actual area of ​​the sound guide hole.

[0088] Figure 12 This is a structural schematic diagram of a sound-generating device according to some embodiments of this application. For example... Figure 12 As shown, the sound-generating device may include a wearing piece 1210 and an acoustic unit 1220. The acoustic unit 1220 has a cuboid structure. One shorter side of the acoustic unit 1220 is connected to the wearing piece 1210, and the longer side is connected to the wearing piece at an angle, such 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, while 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 angled to the wearing piece 1210, allowing the first sound guide hole of the acoustic unit 1220 to be closer to the user's ear canal opening when the user wears the sound-generating device. In some embodiments, the angle θ between the longer side of the acoustic unit 1220 and the wearing piece 1210 can be 5°-85°. In some embodiments, the angle θ can be 10°-70°. In some embodiments, the angle θ can be 15°-60°. In some embodiments, the angle θ can be 20°-45°. In some embodiments, the included angle θ can be 30°-90°. In some embodiments, the acoustic unit and the wearable device can be an integrally formed structure, with the acoustic unit located within the wearable device. Figure 13 This is a schematic diagram of the structure of a wearable device according to some embodiments of this application; Figure 14A and Figure 14B yes Figure 13 Schematic diagrams of the wearable device from different perspectives. Combined with... Figure 13 , Figure 14A and Figure 14B The wearing piece 1300 has a recessed section 1320 and a connecting section 1310 connected to the recessed section 1320. The recessed section 1320 causes the upper edge of the wearing piece 1300 to be recessed downwards. In this embodiment, the recessed section 1320 is folded, thereby increasing its flexibility. This allows the wearing piece 1300 to adapt to the user's head shape due to the presence of the recessed section 1320, making it easier for the user to wear. In some embodiments, the recessed section 1320 contains an acoustic unit (not shown). The recessed section 1320 can be used to mount the acoustic unit and bring it close to the user's ear. The connecting section 1310 can be used to connect the recessed section 1320 to the visible part of the sound-generating device and to be mounted on the user's auricle. The recessed section 1320 can be physically connected to the connecting section 1310 (e.g., by bonding, embedding, welding, riveting, screw connection, snap-fit ​​connection, etc.).

[0089] In some embodiments, the recessed section 1320 can position the acoustic unit in front of the user's ear. "In front of the ear" can be understood as the side of the user's ear facing the user's face. For example, when the user wears the sound-generating device, the recessed section 1320 can be positioned on the side of the ear facing the user's eyes. This allows the acoustic unit positioned on the recessed section 1320 to be closer to the user's ear canal opening, making it easier for the sound signal emitted by the acoustic unit to reach the user's ear.

[0090] In some embodiments, the recessed segment 1320 can be configured in any feasible shape. The shape of the recessed segment 1320 can be understood as the shape of the structure of the recessed segment 1320 or the concave shape of the recessed segment 1320. The shape of the exemplary recessed segment 20 may include, but is not limited to, a Y-shape, a V-shape, or a folded shape. Several exemplary recessed segments will be described below.

[0091] The recessed section 1320 may include a transition portion 1321 and a mounting portion 1322 connected at an angle. An acoustic unit may be disposed in the mounting portion 1322. The transition portion 1321 is bent and connected to the connecting section 1310 and extends downwards to extend towards the user's ear canal opening when worn, thus reducing the distance between the acoustic unit disposed therein and the ear canal opening. The transition portion 1321 may refer to the portion of the recessed section 1320 closer to the visible element. The mounting portion 1322 may refer to the portion of the recessed section 1320 closer to the user's ear. In some embodiments, the transition portion 1321 and the mounting portion 1322 may have different or the same shape, and the mounting portion 1322 and the transition portion 1321 of the recessed section 1320 may be connected at any angle to form recessed sections 1320 of different shapes. The phrase "the mounting portion 1322 and the transition portion 1321 of the recessed section 1320 are connected at any angle" means that the included angle formed after the mounting portion 1322 and the transition portion 1321 are connected can be any angle. In some embodiments, the included angle formed between the mounting portion 1322 and the transition portion 1321 can be in the range of 15 degrees to 150 degrees. In some embodiments, the included angle formed between the mounting portion 1322 and the transition portion 1321 can be in the range of 30 degrees to 150 degrees. In some embodiments, the included angle formed between the mounting portion 1322 and the transition portion 1321 can be in the range of 45 degrees to 135 degrees. In some embodiments, the included angle formed between the mounting portion 1322 and the transition portion 1321 can be in the range of 60 degrees to 120 degrees. In some embodiments, the included angle formed between the mounting portion 1322 and the transition portion 1321 can be in the range of 75 degrees to 90 degrees. For example, the included angle formed between the mounting portion 1322 and the transition portion 1321 can be 30 degrees, 60 degrees, 90 degrees, or 120 degrees, etc.

[0092] In some embodiments, the mounting portion 1322 and the transition portion 1321 can be detachably connected, such as by screwing or plugging. In some embodiments, the connecting segment 1310 and the recessed segment 1320 can be fixedly connected, for example, by welding, riveting, or bonding. In some embodiments, the mounting portion 1322 and the transition portion 1321 can also be directly connected, or they can be connected by an adjustment structure. The adjustment structure can be a hinge, ball joint, or telescopic rod. The adjustment structure allows the mounting portion 1322 to rotate or translate relative to the transition portion 1321. In some embodiments, the mounting portion 1322 and the transition portion 1321 can also be an integral structure.

[0093] As an example, in some embodiments, the recessed section 1320 may be V-shaped, meaning the recess formed by the mounting portion 1322 and the transition portion 1321 is V-shaped. One end of the mounting portion 1322 is connected to the portion of the connecting section 1310 away from the visible element (e.g., the first connecting section 1312), and the other end extends downwards, with the angle between the mounting portion 1322 and the connecting section 1310 approximately 90 degrees. One end of the transition portion 1321 is connected to the portion of the connecting section 1310 near the visible element (e.g., the second connecting section 1311), and the other end extends towards the user's tragus and is tilted at a certain angle relative to the connecting section 1310. The mounting portion 1322 and the transition portion 1321 connect to form a downward-facing V-shaped recess.

[0094] It should be noted that the foregoing one or more embodiments are for illustrative purposes only and are not intended to limit the shape or number of the recessed segments 1320. After fully understanding the principle of the recessed segments 1320, the recessed segments 1320 can be modified to obtain recessed segments 1320 different from those in the embodiments of this application. For example, the shapes of the mounting portion 1322 and the transition portion 1321 can be adjusted so that the shape of the recessed segment 1320 formed by the mounting portion 1322 and the transition portion 1321 is U-shaped. In some embodiments, the wearer 1300 may include a plurality of recessed segments 1320, each recessed segment 1320 may have a different shape. For example, the wearer 1300 may include two recessed segments 1320, one recessed segment 1320 having a V-shaped structure and the other recessed segment 1320 having a Y-shaped structure.

[0095] In some embodiments, the connecting segment 1310 may include a first connecting segment 1312 and a second connecting segment 1311. A recessed segment 1320 connects between the first connecting segment 1312 and the second connecting segment 1311. The first connecting segment 1312 is used to mount on the auricle. The second connecting segment 1311 is used to connect to a visual element. In some embodiments, the second connecting segment 1311 may be straight, connected to one end of the mounting portion 1322 and extending in a direction away from the first connecting segment 1312. The recessed segment 1320 extends downward relative to the first connecting segment 1312 and the second connecting segment 1311, and is convex relative to the first connecting segment 1312 and the second connecting segment 1311, and has a recess.

[0096] In some application scenarios, when the wearer 1300 is placed on the user's auricle, the concave section 1320 can be located on the side of the auricle facing the user's eyes, so that when the user wears it, the concave section 1320 extends towards the tragus, so that the acoustic unit located in the concave section 1320 is close to the tragus, so as to be closer to the user's external auditory canal, thus reducing the distance between the acoustic unit and the user's ear, making it easier to transmit sound to the user.

[0097] In some embodiments, the acoustic unit (not shown) may be located inside the mounting portion 1322, which is a hollow shell structure and serves as the housing for the acoustic unit. In some embodiments, the diaphragm and magnetic circuit structure of the acoustic unit are connected via a voice coil. The magnetic circuit structure is connected to the mounting portion 1322. The side of the diaphragm facing away from the magnetic circuit structure is the front side of the diaphragm, and the other side is the back side. The diaphragm vibrates to radiate sound outward from its front and back sides, respectively. In some embodiments, the mounting portion 1322 and the diaphragm form a first acoustic chamber for radiating sound. The first acoustic chamber is acoustically coupled to a first sound guide hole 1330, which is located on different sidewalls of the mounting portion 1322 corresponding to the first acoustic chamber. Further, the first sound guide hole 1330 is located on the sidewall of the mounting portion 1322 facing away from the transition portion 1321. When the user wears the sound-generating device, the first sound guide hole 1330 is located near the user's ear canal opening. In some embodiments, the first sound guide hole 1330 may include a first hole portion 1331 and a second hole portion 1332. The first hole portion 1331 is located on the side wall of the mounting portion 1322 away from the transition portion 1321, and the second hole portion 1332 is located on the bottom side wall of the mounting portion 1322. The first hole portion 1331 and the second hole portion 1332 are connected.

[0098] In some embodiments, the acoustic unit further includes a second sound guide 1340, which is used to transmit sound emitted from the back of the acoustic unit to the external environment. The second sound guide 1340 is located on different side walls of the mounting portion 1322 corresponding to the second acoustic chamber, and the second sound guide 1340 is acoustically coupled to the second acoustic chamber. In some embodiments, the second sound guide 1340 is arranged opposite to the first sound guide 1330. This opposite arrangement can be understood as the opening orientation of the second sound guide 1340 and the first sound guide 1330 being opposite or approximately considered as opposite. The second sound guide includes a third hole portion 1341 and a fourth hole portion 1342, wherein the third hole portion 1341 is located on the side wall of the mounting portion 1322 near the transition portion 1321, and the fourth hole portion is located on the top of the mounting portion 1322. When a user wears the sound-generating device, the first aperture 1331 and the second aperture 1332 of the first sound guide 1330 face the user's ear canal, while the third aperture 1341 and the fourth aperture 1342 of the second sound guide 1340 face away from the user's ear canal. The sound output from the first sound guide 1330 and the sound output from the second sound guide 1340, meeting specific conditions (e.g., a phase difference of approximately 180°), can form dipole-like radiation. In the far field, the sound output from the first sound guide 1330 and the sound output from the second sound guide 1340 can cancel each other out of phase, thereby reducing the sound leakage volume of the acoustic unit in the far field and preventing the sound output from the acoustic unit from being heard by nearby people.

[0099] It should be noted that the foregoing one or more embodiments are for illustrative purposes only and are not intended to limit the positions of 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, modifications can be made to the first sound guide hole 1330 and the second sound guide hole 1340 to obtain first sound guide holes 1330 and second sound guide holes 1340 different from those in the embodiments of this application. For example, the positions of the first sound guide hole 1330 and the second sound guide hole 1340 can be adjusted so that either 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 detailed information on the first sound guide hole 1330 and the second sound guide hole 1340, please refer to other parts of this specification, such as... Figure 7 (b) and its related description.

[0100] Figure 15 This is a schematic diagram of the structure of a wearable device according to some embodiments of this application. Figure 15 The wearable part 1500 shown is... Figure 13 , Figure 14A and Figure 14B The overall structure of the wearable device 1300 shown is roughly the same, the difference being that... Figure 15 The position of the second sound guide hole 1540 of the wearable device 1500 shown is different. Figure 15 The first connecting section 1512, the second connecting section 1511, the transition section 1521, the mounting section 1522, the first sound guide hole 1530, the first hole section 1531, and the second hole section 1532 are respectively connected to... Figure 13 , Figure 14A and Figure 14B The structures of the first connecting section 1312, the second connecting section 1311, the transition section 1321, the mounting section 1322, the first sound guide hole 1330, the first hole section 1331, and the second hole section 1332 shown are similar. The magnetic circuit structure of the acoustic unit may include a magnetically conductive cover ( Figure 15 (Not shown in the image), the magnetic shield faces away from the diaphragm, and a portion of the magnetic shield's structure serves as a sidewall of the mounting portion 1522. This can be understood as the magnetic shield being a sidewall of the mounting portion 1522. In some embodiments, the mounting portion 1522 may include one or more second sound guide holes 1540, wherein the second sound guide holes 1540 may be located on the magnetic shield. Here, the first sound guide hole 1530 and the second sound guide hole 1540 in the acoustic unit may be approximately opposite each other. When the user wears the sound-generating device, the first sound guide hole 1530 faces the user's ear canal, and the second sound guide hole 1540 faces away from the user's face. It should be noted that the number of second sound guide holes 1540 is not limited to... Figure 15The two shown can also be one, three, or four, etc. For detailed information on the first sound guide hole 1530 and the second sound guide hole 1540, please refer to other parts of this specification, such as... Figure 7 (c) and its related description.

[0101] Figure 16 This is a schematic diagram of the structure of another wearable device according to some embodiments of this application. Figure 16 The wearable part 1600 shown is... Figure 13 , Figure 14A and Figure 14B The overall structure of the wearable device 1600 shown is roughly the same, the difference being that... Figure 16 The position of the second sound guide hole 1640 of the wearable device 1600 shown is different. Figure 16 The first connecting section 1612, the second connecting section 1611, the transition section 1621, the mounting section 1622, the first sound guide hole 1630, the first hole section 1631, and the second hole section 1632 are respectively connected to... Figure 13 , Figure 14A and Figure 14B The structures of the first connecting section 1312, the second connecting section 1311, the transition section 1321, the mounting section 1322, the first sound guide hole 1330, the first hole section 1331, and the second hole section 1332 shown are similar. Figure 16 As shown, the second sound guide hole 1640 is located on one side wall of the mounting portion 1622 corresponding to the second acoustic chamber. When the 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 detailed information about the first sound guide hole 1630 and the second sound guide hole 1640, please refer to other parts of this specification, such as... Figure 7 (d) and its related description.

[0102] It should be understood that, Figure 15 and Figure 16 The provided illustrations are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art can make various modifications and variations based on the guidance of this application. All such modifications and variations will fall within the scope of protection of the claims. In some embodiments, the shape, size, position, or one or more features of the elements shown in the figures may be adjusted according to actual circumstances.

[0103] In some embodiments, the acoustic output performance of the acoustic unit can be improved by reducing the volume of the second acoustic chamber to lower the resonant frequency corresponding to the resonance peak of the acoustic unit. The shape or volume of the second acoustic chamber of the acoustic unit is related to the position of the acoustic transducer components (e.g., diaphragm, magnetic circuit structure) within the housing. For example, a second acoustic chamber is formed between the diaphragm and the housing; the larger the distance between the opposing sidewalls of the diaphragm and the housing, the larger the volume of the second acoustic chamber. In some embodiments, the volume of the second acoustic chamber can be reduced by decreasing the distance between the diaphragm and the housing. In some embodiments, the volume of the second acoustic chamber can also be reduced by adjusting the structure of the housing.

[0104] Figure 17 These are schematic diagrams illustrating the structures of different acoustic units according to some embodiments of this application. For example... Figure 17As shown in (a), the acoustic unit 1710 may include a housing 1711 and an acoustic transducer 1712. In some embodiments, the housing 1711 may be a hollow cuboid structure, and the housing 1711 may include a protrusion 17111 that protrudes outward relative to a sidewall on one side of the housing. The acoustic transducer 1712 is used to convert a signal containing sound information into a sound signal. In some embodiments, the acoustic transducer 1712 may include a diaphragm and a magnetic circuit structure, which 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 the sound-containing signal (i.e., an electrical 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 diaphragm drives the air inside the housing 1711 to vibrate, thereby generating sound waves. In some embodiments, the side of the diaphragm of the acoustic transducer 1712 facing 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. The diaphragm vibrates to radiate sound from its front and back sides, respectively. In some embodiments, the housing 1711 and the front side of the diaphragm form a first acoustic chamber 1713 for radiating sound. The magnetic shield of the magnetic circuit structure can be a complete sidewall or a part of a sidewall of the housing 1711 where the protrusion 17111 is located. The protrusion 17111 protrudes outward relative to the magnetic shield, and a second acoustic chamber 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 guide hole 1715 for outputting the sound generated by the front side of the diaphragm toward the user's ear canal. The first sound guide hole 1715 is acoustically coupled to the first acoustic chamber 1713. Specifically, the first sound guide hole 1715 is located on the side wall of the housing 1711 where the first acoustic chamber 1713 is located. To reduce sound leakage of the acoustic unit 1710, in some embodiments, the acoustic unit 1710 may also include a second sound guide hole 1716, which is used to transmit the sound emitted from the back of the diaphragm to the external environment. In some embodiments, the second sound guide hole 1716 may be located on a magnetic shield, and the second sound guide hole 1716 on the magnetic shield can directly output the sound generated from the back of the diaphragm to the outside. In some embodiments, the second sound guide hole 1716 may also be located on the side wall of the protrusion 17111 corresponding to the second acoustic chamber 1714. The sound generated from the back of the diaphragm can be transmitted to the second acoustic chamber 1714 through the opening (not shown in the figure) on the magnetic shield, and then transmitted to the external environment through the second sound guide hole 1716 provided on the protrusion 17111. In some embodiments, the shape and number of the second sound guide hole on the magnetic shield and the second sound guide hole on the protrusion 17111 may be the same. In some embodiments, the shape of the second sound guide hole 1716 may be one or more of other regular or irregular shapes such as rectangle, circle, semicircle, ellipse, pentagon, triangle, etc.In some embodiments, the shape and number of the second acoustic holes on the magnetic shield and the second acoustic holes on the protrusion may also be different. For example, ... Figure 17 In (b), the second sound-guiding hole 1726 on the magnetic shield is rectangular, while the second sound-guiding hole 1726 on the protrusion is triangular. In some embodiments, the orientation of the second sound-guiding hole on the magnetic shield and the second sound-guiding hole on the protrusion can be the same or different. For example, Figure 17 (a) and Figure 17 In (b), when the sidewall of the magnetic shield containing the second sound guide hole and the protrusion are opposite to the diaphragm of the acoustic transducer, the second sound guide hole on the magnetic shield and the second sound guide hole on the protrusion face the same direction. For example, Figure 17 In (c), the second sound guide hole 1736 provided at the magnetic shield has a different orientation than the second sound guide hole 1736 provided on the protrusion. It should be noted that the second sound guide holes (e.g., second sound guide holes 1716, second sound guide holes 1726, and second sound guide holes 1736) in the above embodiments are merely illustrative examples. The position, number, size, shape, etc., of the second sound guide holes can be adjusted according to the actual application scenario. As long as the first sound guide hole and the second sound guide hole are arranged opposite to each other or the sound output from the first sound guide hole and the sound output from the second sound guide hole are approximately opposite to each other, they are within the protection scope of this specification.

[0105] It should be noted that different embodiments may produce different beneficial effects. In different embodiments, the beneficial effects may be any one or a combination of the above, or any other possible beneficial effects.

[0106] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0107] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic related to at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0108] Furthermore, unless expressly stated in the claims, the order of processing elements and sequences, the use of numbers and letters, or other names described in this application are not intended to limit the order of the processes and methods of this application. Although the foregoing disclosure has discussed some currently considered useful embodiments of the invention through various examples, it should be understood that such details are for illustrative purposes only, and the appended claims are not limited to the disclosed embodiments; rather, the claims are intended to cover all modifications and equivalent combinations that conform to the substance and scope of the embodiments of this application. For example, while the system components described above can be implemented using hardware devices, they can also be implemented solely through software solutions, such as installing the described system on existing servers or mobile devices.

[0109] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0110] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of range in some embodiments of this application are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0111] For each patent, patent application, patent application publication, and other material such as articles, books, specifications, publications, and documents referenced in this application, the entire contents of that patent are incorporated herein by reference. This excludes historical application documents that are inconsistent with or conflict with the content of this application, as well as documents that limit the broadest scope of the claims in this application (currently or subsequently appended to this application). It should be noted that if there are any inconsistencies or conflicts between the descriptions, definitions, and / or terminology used in the supplementary materials of this application and the content of this application, the descriptions, definitions, and / or terminology used in this application shall prevail.

[0112] Finally, it should be understood that the embodiments described in this application are merely illustrative of the principles of the embodiments of this application. Other modifications may also fall within the scope of this application. Therefore, alternative configurations of the embodiments of this application are considered as examples and not limitations, and are regarded as consistent with the teachings of this application. Accordingly, the embodiments of this application are not limited to the embodiments explicitly described and illustrated in this application.

Claims

1. A sound-generating device, characterized in that, include: The sound-generating device includes a wearable component and an acoustic unit connected to the wearable component. The wearable component is used to maintain stable contact between the sound-generating device and the user. The acoustic unit includes a housing and a diaphragm disposed within the housing. The diaphragm and the housing form a first acoustic chamber for radiating sound. The housing includes a first sound guide hole acoustically coupled to the first acoustic chamber. The first sound guide hole includes a first aperture and a second aperture connected together. The first aperture and the second aperture are located on different sidewalls of the housing corresponding to the first acoustic chamber. When the user wears the sound-generating device, the acoustic unit is located on the front side of the auricle and is tilted so that the first sound guide hole is closer to the ear canal opening, and at least one of the first aperture and the second aperture does not contact the ear. The sound-generating device includes Scheme 1 or Scheme 2; Option 1: When the user wears the sound-generating device, the acoustic unit is connected to the lower part of the wearing piece to be closer to the ear canal opening. The first sidewall of the acoustic unit is inclined towards the ear canal opening. The first hole is located on the first sidewall, and the second hole is located on the second sidewall of the acoustic unit. In the acoustic unit, the length of the first sidewall is greater than the length of the third sidewall of the acoustic unit. The third sidewall is arranged opposite to the second sidewall and connected to the wearing piece. The first sidewall connects the second sidewall and the third sidewall. The angle between the line connecting the first sound guide hole and the second sound guide hole and the line connecting the centroid of the diaphragm and the user's ear canal opening is less than 45°. Option 2: The wearing device includes a connecting section and a recessed section. The recessed section is connected to the connecting section. The acoustic unit is disposed within the recessed section and below the connecting section. The recessed section is configured such that when the user wears the sound-generating device, the acoustic unit is positioned below the connecting section and closer to the ear canal opening. The recessed section includes a transition portion and a mounting portion connected at an angle. The transition portion is bent and connected to the connecting section and extends downward to extend towards the user's ear canal opening when worn. The mounting portion refers to the part of the recessed section closer to the user's ear and serves as the housing of the acoustic unit. The first hole is located on the side wall of the mounting portion away from the transition portion, and the second hole is located on the bottom side wall of the mounting portion.

2. The sound-generating device according to claim 1, characterized in that, The first hole and the second hole are located on two adjacent side walls of the housing corresponding to the first acoustic chamber.

3. The sound-generating device according to claim 2, characterized in that, The area connecting the two ends with the largest distance between the first hole and the second hole is used as the equivalent sound outlet, which faces the ear canal opening.

4. The sound-generating device according to claim 1, characterized in that, The length of the sidewall containing the first hole is greater than the length of the sidewall containing the second hole, wherein the second hole does not contact the ear when the user wears the sound-emitting device.

5. The sound-generating device according to claim 4, characterized in that, The ratio between the length of the first hole and the length of the sidewall it is located in is in the range of 0.3-0.8, and the ratio between the length of the second hole and the length of the sidewall it is located in the range of 1 / 6-2 / 3.

6. The sound-generating device according to claim 1, characterized in that, The sound-generating device further includes a voice coil and a magnetic circuit structure. The voice coil is connected to the diaphragm, and the magnetic circuit structure is connected to the housing. The housing and the magnetic circuit structure form a second acoustic chamber for radiating sound. The housing also includes a second sound guide hole that is acoustically coupled to the second acoustic chamber. When the user wears the sound-generating device, the distance between the second sound guide hole and the ear canal opening is greater than the distance between the diaphragm and the ear canal opening.

7. The sound-generating device according to claim 6, characterized in that, The distance between the second sound guide hole and the ear canal opening is 1.5cm-5cm.

8. The sound-generating device according to claim 7, characterized in that, The ratio of the distance between the second sound guide hole and the ear canal opening to the distance between the first sound guide hole and the ear canal opening is 1.4-5.

9. The sound-generating device according to claim 6, characterized in that, The magnetic circuit structure includes a magnetic shield that is away from the diaphragm. A portion of the magnetic shield serves as a sidewall of the housing, and the second sound guide hole is located on the magnetic shield.

10. The sound-generating device according to claim 9, characterized in that, The housing includes a protrusion that protrudes outward relative to the magnetic shield. The magnetic shield is part of a side wall of the housing where the protrusion is located. The second acoustic chamber is formed between the back of the diaphragm and the protrusion. The second sound guide hole is also located on the protrusion.

11. The sound-generating device according to claim 1, characterized in that, The sound-generating device also includes a visual component, with each end of the visual component connected to a wearable component, and the two wearable components are respectively mounted on the corresponding left and right ears.

12. The sound-generating device according to claim 1, characterized in that, In Scheme 2, the angle between the line connecting the first sound guide hole and the second sound guide hole and the line connecting the centroid of the diaphragm and the user's ear canal opening is less than 45°.

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