Audio output device

Abstract

The present application discloses an acoustic output device, which includes an acoustic driver including a diaphragm and a magnetic circuit structure, wherein the side of the diaphragm facing away from the magnetic circuit structure forms the front surface of the acoustic driver, and the side of the magnetic circuit structure facing away from the diaphragm forms the back surface of the acoustic driver, and wherein the acoustic driver emits sound to the outside from the front surface and back surface of the acoustic driver by vibration of the diaphragm, and a housing structure configured to mount the acoustic driver, wherein the back surface of the acoustic driver and the housing structure form a rear cavity, and different side walls of the rear cavity are connected by a curved structure, and the housing structure is acoustically coupled to the rear cavity and includes at least one sound emission hole that transmits sound emitted from the acoustic driver to the rear cavity to the outside of the acoustic output device, and the at least one sound emission hole is located in at least a part of the side wall of the rear cavity.

Description

[Technical field]

[0001] (Priority information) This application claims priority to International Application No. PCT / CN2020 / 106759, filed August 4, 2020, the entire contents of which are incorporated herein by reference.

[0002] This application relates to the field of audio, and in particular to audio output devices. [Background technology]

[0003] An open-ear type audio output device is a portable audio output device that realizes acoustic conduction in a specific range. Compared with conventional canal type earphones and headphones, the open-ear type audio output device has the characteristic of not blocking or covering the ear canal, and allows users to obtain audio information from the external environment while listening to music, thereby improving safety and comfort. Due to the use of an open type structure, the sound leakage of the open-ear type audio output device is often more serious than that of conventional earphones. Currently, in the industry, it is common to place a speaker in an acoustic cavity and open holes on the front and back of the acoustic cavity to generate a specific sound field with a certain directionality. In some cases, considering the external design and structural problems of the audio output device, it is not possible to open holes on the back of the acoustic cavity, and in this case, the reflection of the sound from the inside of the acoustic cavity causes resonance and standing waves, so that the sound output from the back of the acoustic cavity has a low high-frequency resonance peak. In this way, while the frequency response range of the acoustic output device is narrowed, the phase of the sound output from the rear surface of the acoustic cavity is inverted near the high-frequency resonance peak, resulting in the sound output from the rear surface of the acoustic cavity and the sound output from the front being overlapped and emphasized, resulting in increased sound leakage in the far-field. Summary of the Invention [Problem to be solved by the invention]

[0004] Therefore, it is desirable to provide an audio output device that can effectively suppress standing waves and widen the frequency response range. [Means for solving the problem]

[0005] An acoustic output device according to an embodiment of the present application includes an acoustic driver including a vibration membrane and a magnetic circuit structure, wherein the side of the vibration membrane facing away from the magnetic circuit structure forms the front side of the acoustic driver, and the side of the magnetic circuit structure facing away from the vibration membrane forms the back side of the acoustic driver, and the acoustic driver emits sound to the outside from the front side and back side respectively due to vibration of the vibration membrane, and a housing structure configured to mount the acoustic driver, wherein the back side of the acoustic driver and the housing structure form a rear cavity, and different side walls of the rear cavity are connected by a curved structure, and the housing structure is acoustically coupled to the rear cavity and includes at least one sound emission hole that transmits sound emitted from the acoustic driver to the rear cavity to the outside of the acoustic output device, and the at least one sound emission hole is located in at least a part of the side wall of the rear cavity.

[0006] In some embodiments, the different side walls of the rear cavity include at least one first side wall and a second side wall, the at least one first side wall being located on a periphery of the housing structure and the second side wall being disposed opposite a rear surface of the acoustic driver, and an end of the at least one first side wall away from the acoustic driver and an end of the second side wall being connected by the curved structure.

[0007] In some embodiments, the at least one sound emission hole is located in the at least one first sidewall.

[0008] In some embodiments, the at least one sound emission hole is located in the at least one first sidewall and includes a first sound emission hole and a second sound emission hole disposed opposite each other.

[0009] In some embodiments, a cross-sectional area of ​​the second sound emission hole is equal to or smaller than a cross-sectional area of ​​the first sound emission hole.

[0010] In some embodiments, the cross-sectional area of ​​the at least one sound emission hole is 0.25 mm 2 That's all.

[0011] In some embodiments, the at least one sound outlet hole is provided with an acoustic dampening structure.

[0012] In some embodiments, the magnetic circuit structure includes a magnetic flux conducting plate arranged opposite the diaphragm, and the magnetic flux conducting plate includes at least one third sound emission hole that transmits sound generated by vibration of the diaphragm from a rear surface of the acoustic driver.

[0013] In some embodiments, a sound guide tube is provided in the at least one third sound emission hole along a direction away from the diaphragm, and the sound guide tube transmits sound emitted from the at least one third sound emission hole to the rear cavity.

[0014] In some embodiments, the at least one third sound emission hole includes a first hole portion and a second hole portion arranged in sequence from the inside to the outside, the first hole portion and the second hole portion are penetrating, and a diameter of the second hole portion is larger than a diameter of the first hole portion.

[0015] In some embodiments, the membrane has a planar or nearly planar shape.

[0016] In some embodiments, the membrane is secured to the acoustic driver by an edge that is concave away from the rear cavity.

[0017] In some embodiments, the acoustic driver further comprises a protective structure disposed on the front surface thereof facing the diaphragm.

[0018] In some embodiments, the protective structure is configured to isolate the membrane from the outside world and to be able to isolate the membrane from the outside world and to be able to transmit sound generated by the membrane to the outside world.

[0019] In some embodiments, the protective structure includes a filter structure.

[0020] In some embodiments, the protective structure includes a plate structure having at least one sound emission hole.

[0021] In some embodiments, the front surface of the acoustic driver and the housing structure form a front cavity, and the housing structure includes at least one fourth sound guide hole, which transmits sound generated by the diaphragm from the front surface of the acoustic driver to the outside of the audio output device.

[0022] In some embodiments, the at least one fourth sound emission hole is provided with an acoustic damping structure.

[0023] The present application will be further illustrated by example embodiments, which are not limiting and will be described in detail with reference to the drawings, in which like numbers refer to like structures. [Brief description of the drawings]

[0024] [Figure 1] FIG. 1 is a schematic diagram illustrating an example of a configuration of an audio output device according to some embodiments of the present application. [Diagram 2] FIG. 2 is a schematic diagram of a frequency response curve of an acoustic output device according to some embodiments of the present application. [Diagram 3] FIG. 13 is an exemplary schematic diagram of a sound output device according to another embodiment of the present application. [Figure 4] FIG. 13 is a schematic diagram of a frequency response curve of an acoustic output device according to another embodiment of the present application. [Diagram 5] FIG. 13 is an exemplary schematic diagram of a sound output device according to another embodiment of the present application. [Figure 6]FIG. 13 is a schematic diagram of a frequency response curve of an acoustic output device according to another embodiment of the present application. [Figure 7] FIG. 13 is an exemplary schematic diagram of a sound output device according to another embodiment of the present application. [Figure 8] FIG. 13 is an exemplary schematic diagram of a sound output device according to another embodiment of the present application. [Figure 9] FIG. 13 is an exemplary schematic diagram of a sound output device according to another embodiment of the present application. [Figure 10] FIG. 13 is an exemplary schematic diagram of a sound output device according to another embodiment of the present application. [Figure 11] FIG. 13 is an exemplary schematic diagram of a sound output device according to another embodiment of the present application. [Figure 12] FIG. 2 is a schematic diagram illustrating an example of a configuration of a vibrating membrane of an acoustic output device according to some embodiments of the present application. [Figure 13] 1 is a schematic diagram of the effect of wearing an audio output device according to some embodiments of the present application. [Figure 14] 1 is an exemplary multiple view diagram of an audio output device according to some embodiments of the present application; [Figure 15] FIG. 2 is an exemplary multiple-view diagram of an audio output device according to another embodiment of the present application. [Figure 16] FIG. 2 is an exemplary multiple-view diagram of an audio output device according to another embodiment of the present application. [Figure 17] FIG. 2 is an exemplary multiple-view diagram of an audio output device according to another embodiment of the present application. [Figure 18] FIG. 2 is an exemplary multiple-view diagram of an audio output device according to another embodiment of the present application. [Figure 19] FIG. 2 is an exemplary multiple-view diagram of an audio output device according to another embodiment of the present application. [Figure 20] FIG. 2 is an exemplary multiple-view diagram of an audio output device according to another embodiment of the present application. [Figure 21] FIG. 2 is an exemplary multiple-view diagram of an audio output device according to another embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] In order to more clearly describe the technical means of the embodiments of the present application, the drawings necessary for the description of the embodiments will be briefly described below. Obviously, the drawings described below are merely some examples or embodiments of the present application, and those skilled in the art can apply the present application to other similar scenarios based on these drawings without creative efforts. Unless otherwise clear from the language environment or described otherwise, the same numbers in the drawings indicate the same structures or operations.

[0026] It should be understood that the terms "system," "apparatus," "unit," and / or "module" used herein are ways of distinguishing between different levels of assemblies, elements, parts, portions, or constructions, however, other terms may be used in place of the above terms if they accomplish the same purpose.

[0027] As used in this application and the claims, unless the context clearly dictates otherwise, terms such as "a," "one," "one kind," and / or "the" do not specifically refer to the singular but may include the plural. In general, the terms "comprise" and "containing" are intended to indicate only the inclusion of explicitly identified steps and elements, and these steps and elements are not intended to be an exclusive listing, and a method or apparatus may also include other steps or elements.

[0028] In this application, flowcharts are used to describe the operations performed by the system according to the embodiments of this application. It should be understood that the preceding and subsequent operations are not necessarily performed in exact order. Instead, the steps may be processed in reverse order or simultaneously. Also, other operations may be added to these processes, or one or more operations may be removed from these processes.

[0029] This specification describes an acoustic output device in which a curved structure is provided in a cavity. For example, the acoustic output device includes at least an acoustic driver and a housing structure, the acoustic driver can directly emit sound from the front side to the outside, the rear side forms a rear cavity with the housing structure, the side wall of the periphery of the rear cavity is provided with a first sound emission hole that can be acoustically coupled with the rear cavity, and the sound from the rear side of the acoustic driver can be emitted to the outside from the first sound emission hole. Since the first sound emission hole is not provided on the side wall of the bottom of the rear cavity facing the rear side of the acoustic driver, in the process of transmitting the sound, the housing structure of the rear cavity reflects the sound emitted from the rear side of the acoustic driver, causing resonance and standing waves, resulting in a large difference between the sound output from the rear side of the acoustic driver and the sound output from the front side of the acoustic driver, which is disadvantageous to reducing sound leakage by interference cancellation. By providing a curved structure between different side walls of the rear cavity (for example, connecting the peripheral side wall of the rear cavity with the bottom side wall of the rear cavity with a curved structure), the reflection conditions inside the rear cavity can be destroyed, suppressing the formation of standing waves, and the curved structure can further compress the volume of the rear cavity to widen the frequency spectrum of the sound emitted by the rear cavity. Therefore, by providing a curved structure between different side walls of the rear cavity, it is ensured that the sound from the rear side (first sound emission hole) of the acoustic driver and the sound emitted to the outside from the front side (diaphragm) of the acoustic driver form a dual sound source that meets certain conditions (for example, opposite phase, same amplitude) within a wide frequency range, so that the sound leakage volume in the far field of the audio output device can be effectively reduced.

[0030] FIG. 1 is an exemplary schematic diagram of an audio output device according to some embodiments of the present application. As shown in FIG. 1, the audio output device 100 may include a housing structure 110 having a hollow interior, and an audio driver 120 provided in the housing structure 110. The audio driver 120 may include a diaphragm 121 and a magnetic circuit structure 1220. The audio driver 120 may further include a voice coil (not shown). The voice coil may be fixed to a side of the diaphragm 121 facing the magnetic circuit structure 1220, and may be located within a magnetic field formed by the magnetic circuit structure 1220. When energized, the voice coil vibrates under the action of a magnetic field, and can generate sound by driving the diaphragm 121 to vibrate. For ease of explanation, the side of the diaphragm 121 facing away from the magnetic circuit structure 1220 (i.e., the right side of the diaphragm 121 in FIG. 1) may be regarded as the front side of the acoustic driver 120, and the side of the magnetic circuit structure 1220 facing away from the diaphragm 121 (i.e., the left side of the magnetic circuit structure 1220 in FIG. 1) may be regarded as the back side of the acoustic driver 120. By vibration of the diaphragm 121, the acoustic driver 120 can emit sound to the outside from its front and back sides, respectively. As shown in FIG. 1, the back side of the acoustic driver 120 and the housing structure 110 form a rear cavity 111. The acoustic driver 120 can emit sound from its back side to the rear cavity 111.

[0031] As shown in FIG. 1, the side walls of the rear cavity 111 may include a first side wall 1101, a second side wall 1102, and a third side wall 1103, and the second side wall 1102 and the third side wall 1103 are positioned directly opposite each other. The first side wall 1101 may be a side wall provided around an axis that is a line connecting the center of the front surface of the acoustic driver 120 and the center of the back surface of the acoustic driver 120, and may be referred to as a peripheral side wall of the rear cavity 111. In some embodiments, the first side wall 1101 may be one or more. For example, when the housing structure 110 is a cylinder, the first side wall 1101 may be an annular peripheral side wall of the cylinder. Also, for example, when the housing structure 110 is a rectangular parallelepiped, the first side wall 1101 may include four interconnected peripheral side walls of the rectangular parallelepiped. The second side wall 1102 may be the left side wall in the plan view shown in FIG. 1, which is provided opposite the rear surface of the acoustic driver 120, and may be called the bottom side wall of the rear cavity 111. The third side wall 1103 may be the right side wall in the plan view shown in FIG. 1. In some embodiments, the diaphragm 121 may be located directly on the third side wall 1103. For example, the third side wall 1103 may include a mounting hole, and the diaphragm 121 may be located in the mounting hole. In some embodiments, the diaphragm 121 may not be located on the third side wall 1103. For example, the third side wall 1103 is provided with an extension that protrudes outward or is recessed inward, the extension has a space for placing the diaphragm 121, and the diaphragm 121 is connected to the extension. In some alternative embodiments, the sidewalls of the rear cavity 111 may include only a first sidewall 1101 and a second sidewall 1102 .

[0032] In some embodiments, the housing structure 110 may further include a first sound output hole 112, which may be located on the first side wall 1101 and communicate with the rear cavity 111. The sound generated at the rear side of the acoustic driver 120 may be transmitted to the outside world through the first sound output hole 112. Within a certain frequency range, the sound output from the first sound output hole 112 and the sound output from the diaphragm 121 may form a dual sound source that satisfies certain conditions (e.g., opposite phase, same amplitude), and in the far field, the sound output from the first sound output hole 112 and the sound output from the diaphragm 121 are offset, thereby reducing the sound leakage volume in the far field of the sound output device and preventing other users from hearing the sound generated from the sound output device. In some embodiments, the first sound output hole 112 may also be located on the second side wall 1102 and communicate with the rear cavity 111.

[0033] When the first sound emission hole 112 is provided on the first side wall of the housing structure 110, in the process in which sound from the rear side of the acoustic driver 120 passes through the rear cavity 111 and is output to the outside from the first sound emission hole 112, the sound is reflected from the rear side of the acoustic driver 120 by the rear cavity 111, causing sound resonance and standing waves. The frequency of the standing wave formed in the rear cavity 111 generates a large sound intensity corresponding to the resonance peak of the frequency response curve of the rear cavity 111. According to the equation for the standing wave,

number

[0034] In order to further widen the frequency spectrum range of the rear cavity so that the sound transmitted from the first sound hole 112 can interfere with and cancel the sound emitted in front of the acoustic driver in a wider frequency range, the embodiment of the present application provides a curved structure between different side walls of the rear cavity to destroy the reflection of the sound caused by the internal structure of the rear cavity and suppress the formation of standing waves. The curved structure can also compress the volume of the rear cavity and move the resonance peak of the rear cavity to a higher frequency range, thereby further widening the frequency spectrum range of the rear cavity.

[0035] Hereinafter, a sound output device according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0036] FIG. 3 is an exemplary schematic diagram of an audio output device according to some embodiments of the present application.

[0037] As shown in FIG. 3, the acoustic output device 300 may include a housing structure 310 and an acoustic driver 320 coupled to the housing structure 310 .

[0038] In some embodiments, housing structure 310 may mount one or more acoustic drivers 320. In some embodiments, housing structure 310 may be a sealed housing structure with a hollow interior, and acoustic driver 320 may be fixedly connected to housing structure 310.

[0039] In some embodiments, the audio output device 300 may be attached to a user's body (e.g., the head, neck, or upper torso of a human body) by the housing structure 310, and at the same time, the housing structure 310 and the audio driver 320 may be close to but not block the ear canal so that the user's ear remains open, allowing the user to hear not only the sound output from the audio output device 300 but also the sound of the external environment. For example, the audio output device 300 may be mounted around or partially around the user's ear. In some embodiments, the audio output device 300 may be combined with a product such as glasses, headphones, a head-mounted display, or an AR / VR helmet, in which case the housing structure 310 may be fixed near the user's ear in a hanging or clamping manner. In some alternative embodiments, the housing structure 310 may be provided with a hook, and the shape of the hook may be adapted to the shape of the pinna, so that the audio output device 300 may be independently attached to the user's ear by the hook. The independently worn audio output devices 300 may be communicatively connected to a signal source (e.g., a computer, a mobile phone, or other mobile device) in a wired or wireless (e.g., Bluetooth®) manner. For example, the left and right aural audio output devices 300 may be communicatively connected directly to a signal source in a wireless manner. For example, the left and right aural audio output devices 300 may include a first output device and a second output device, where the first output device can be communicatively connected to a signal source and the second output device can be wirelessly connected to the first output device in a wireless manner, and the first output device and the second output device realize synchronization of audio playback by one or more synchronization signals. The wireless connection manner includes, but is not limited to, Bluetooth, a local area network, a wide area network, a wireless personal area network, a near field communication, and the like, or any combination thereof.

[0040] In some embodiments, the housing structure 310 may have a shape that matches the human ear, such as a ring shape, an ellipse shape, a polygonal shape (regular or irregular), a U-shape, a V-shape, a semicircle shape, etc., so that the housing structure 310 can be directly hung on the user's ear. In some embodiments, the housing structure 310 may further include one or more fastening structures. The fastening structures may include ear hooks, head beams, or elastic bands to better secure the audio output device 300 to the user and prevent it from falling off during use by the user. As merely an exemplary illustration, for example, the elastic band may be a headband that may be configured to be worn around the head region. Also, for example, the elastic band may be a neckband that is configured to be worn around the neck / shoulder region. In some embodiments, the elastic band may be a continuous strip, and may be elastically pulled to wear on the user's head, and at the same time, pressure may be applied to the user's head to securely fix the audio output device 300 to a specific position on the user's head. In some embodiments, the elastic band may be a discontinuous strip. For example, the elastic band may include a rigid portion and a flexible portion, where the rigid portion may be made of a rigid material (e.g., plastic or metal) and may be secured to the housing structure 310 of the acoustic output device 300 in the manner of a physical connection (e.g., a lock, a screw connection, etc.), and the flexible portion may be made of an elastic material (e.g., fabric, a composite material, or / and chloroprene rubber).

[0041] The acoustic driver 320 is an element that can receive an electric signal, convert it into an audio signal, and output it. In some embodiments, when distinguished according to frequency, the type of the acoustic driver 320 may include a low-frequency (e.g., 3 kHz or less) acoustic driver, a mid-high frequency (e.g., 3 kHz to 7 kHz) acoustic driver, or a high frequency (e.g., greater than 7 kHz) acoustic driver, or any combination thereof. Of course, the low frequency, high frequency, etc. here only represent an approximate range of frequencies, and different application scenarios may have different distinguishing methods. For example, one crossover frequency is determined, and the low frequency represents a frequency range below the crossover frequency, and the high frequency represents a frequency range above the crossover frequency. The crossover frequency may be any value within the audible range of the human ear, such as 500 Hz, 600 Hz, 700 Hz, 800 Hz, or 1000 Hz. In some embodiments, when distinguished according to principle, the acoustic driver 320 further includes, but is not limited to, a moving coil type, a balanced armature type, a piezoelectric type, an electrostatic type, a magnetostrictive type, and the like.

[0042] The acoustic driver 320 may include a diaphragm 321 and a magnetic circuit structure 3220. The diaphragm 321 and the magnetic circuit structure 3220 are arranged in order along the vibration direction of the diaphragm 321. In some embodiments, the diaphragm 321 may be attached to a frame (not shown) and then the frame may be fixed to the magnetic circuit structure 3220. Alternatively, the diaphragm 321 may be directly and fixedly connected to a side wall of the magnetic circuit structure 3220. The side of the diaphragm 321 facing the magnetic circuit structure 3220 forms the front side of the acoustic driver 320, and the side of the magnetic circuit structure 3220 facing the diaphragm 321 forms the back side of the acoustic driver 320, and the acoustic driver 320 emits sound to the outside from its front and back sides, respectively, due to the vibration of the diaphragm 321.

[0043] The rear surface of the acoustic driver 320 and the housing structure 310 form a rear cavity 311. The acoustic driver 320 emits sound from its rear surface into the rear cavity 311. In some embodiments, the housing structure 310 is provided with one or more first sound emission holes 312. The first sound emission holes 312 are acoustically coupled to the rear cavity 311 and transmit the sound emitted from the acoustic driver 320 to the rear cavity 311 to the outside of the audio output device 300.

[0044] In some embodiments, the vibrating membrane 321 may be fitted to a sidewall of the housing structure 310. For example, a mounting hole (not shown) may be formed in the sidewall of the housing structure 310, and an end of the vibrating membrane 321 may be fixed to the mounting hole.

[0045] Continuing to refer to FIG. 3, in some embodiments, the side walls of the rear cavity 311 may include a first side wall 3101, a second side wall 3102, and a third side wall 3103, and the second side wall 3102 and the third side wall 3103 are positioned directly opposite each other. The first side wall 3101 may be a side wall provided around an axis that is a line connecting the center of the front surface of the acoustic driver 120 and the center of the back surface of the acoustic driver 120, and may be referred to as a peripheral side wall of the rear cavity 311. In some embodiments, the first side wall 3101 may be one or more. For example, if the housing structure 310 is a cylinder, the first side wall 3101 may be an annular peripheral side wall of the cylinder. Also, for example, if the housing structure 310 is a rectangular parallelepiped, the first side wall 3101 may include four interconnected peripheral side walls of the rectangular parallelepiped. The second side wall 1102 may be the left side wall in the plan view shown in FIG. 3, which faces the rear surface of the acoustic driver 320, and may be called the bottom side wall of the rear cavity 311. The third side wall 3103 may be the right side wall in the plan view shown in FIG. 3. In some alternative embodiments, the side wall of the rear cavity 311 may only include the first side wall 3101 and the second side wall 3102. In some embodiments, the housing structure 310 may further include a first sound emission hole 312, which may be located in the first side wall 3101 and communicate with the rear cavity 311. Sound generated at the rear surface of the acoustic driver 320 can be transmitted to the outside world through the first sound emission hole 312. Within a certain frequency range, the sound output from the first sound output hole 312 and the sound output from the diaphragm 321 can form a dual sound source that satisfies certain conditions (e.g., opposite phase, same amplitude), and in the far field, the sound output from the first sound output hole 312 and the sound output from the diaphragm 321 are offset, thereby reducing the sound leakage volume in the far field of the sound output device and preventing other users from hearing the sound emitted from the sound output device. In some embodiments, the first sound output hole 312 may also be located on the second side wall 3102 and communicate with the rear cavity 311. The diaphragm 321 in FIG. 3 is similar to the diaphragm 121 in FIG. 1, so a description thereof will be omitted here.

[0046] Continuing to refer to FIG. 3, different from the rear cavity 111 shown in FIG. 1, different side walls (for example, the first side wall 3101 and the second side wall 3102) of the rear cavity 311 are connected by a curved structure 3111. For example, the end of the first side wall 3101 away from the acoustic driver and the end of the second side wall 3102 are connected by a curved structure 3111. The curved structure 3111 can change the reflection condition of the sound emitted from the rear side of the acoustic driver 320 by the inside of the rear cavity 311. According to formula (1), providing the curved structure 3111 corresponds to shortening the length l of the long side of the rear cavity, so that the frequency of the sound in which the standing wave is formed appears in a higher frequency range. The "connection" referred to in this application may be joining different assemblies to each other in a specific manner, or may be a fixed connection between different parts of the same assembly. For example, in some embodiments, the curved structure 3111 may be integrally molded with the first sidewall 3101 and fixedly connected to the second sidewall 3102 in an adhesive or locking manner. In some alternative embodiments, the curved structure 3111 may be integrally molded with the second sidewall 3102 and fixedly connected to the first sidewall 3101 in an adhesive or locking manner. In some alternative embodiments, the curved structure 3111, the first sidewall 3101, and the second sidewall 3102 are integrally molded.

[0047] It should be noted that in the embodiments herein, the curved structure 3111 may be a structure having a certain curvature. A plane on which the first side wall 3101 is located and a plane on which the second side wall 3102 is located are in contact with the curved structure 3111, respectively. In some embodiments, the curved structure 3111 may protrude outward or recess inward with respect to the rear cavity 311. In some embodiments, the curvature degree and / or curvature direction of the curved structures formed by the connection points of different side walls may be the same or different. In some embodiments, the curvature range of the curved structure having a certain curvature is 50m. -1 ~100m -1When the sound output device uses a curved structure with this curvature range, the frequency range corresponding to the high frequency resonance peak is 4 kHz to 6 kHz. In some embodiments, the frequency corresponding to the high frequency resonance peak of the rear cavity of the sound output device can be adjusted by adjusting the curvature of the curved structure. For example, when the curvature range of the curved structure is about 67 m, -1 Then, the frequency corresponding to the high frequency resonance peak of the rear cavity of the acoustic output device is 5 kHz.

[0048] It should be noted that the above description of the curved structure is merely illustrative, and in some other embodiments of the present application, in addition to providing a curved structure between different side walls of the rear cavity to suppress standing waves, protrusion structures of various shapes may be provided inside the rear cavity, which similarly destroys the reflection of sound caused by the internal structure of the rear cavity and also shortens the length l of the long side of the rear cavity.

[0049] Fig. 4 is a schematic diagram of a frequency response curve of the rear cavity of the sound output device according to Fig. 1 and Fig. 3. As shown in Fig. 4, in the frequency response curve of the first sound output hole 312 in the case where the curved structure 3111 is provided at the connecting portion between the first side wall 3101 and the second side wall 3102 of the rear cavity 311 ("curved structure" shown in Fig. 4), a high-frequency resonance peak is located at point B and the corresponding frequency is about 5.2 kHz, and in the frequency response curve of the sound output hole in the case where the curved structure 3111 is not provided at the connecting portion between the first side wall 1101 and the second side wall 1102 ("no curved structure" shown in Fig. 4), a high-frequency resonance peak is located at point A and the corresponding frequency is about 3.7 kHz. As can be seen from this, by providing the curved structure 3111 at the connection point between the first side wall 3101 and the second side wall 3102 of the housing structure 310, the frequency corresponding to the high-frequency resonance peak of the frequency response curve of the sound at the first sound emission hole 312 can be increased, widening the frequency spectrum of the sound at the first sound emission hole 312, and as a result, the sound at the first sound emission hole 312 and the sound emitted to the outside from the vibrating membrane 321 can more easily form a dual sound source that satisfies certain conditions (e.g., opposite phase, same amplitude), thereby reducing the sound leakage volume in the far field of the sound output device. In addition, by setting the connection point between the first side wall and the second side wall to a curved structure, the volume of the rear cavity 311 can be reduced, and the resonance peak of the rear cavity can be moved to a higher frequency range, while more sound energy of the sound emitted from the rear surface of the acoustic driver 320 can be emitted to the outside from the sound emission hole (e.g., the first sound emission hole 312).

[0050] Fig. 5 is an exemplary schematic diagram of another sound output device according to some embodiments of the present application. The sound output device 500 shown in Fig. 5 has almost the same structure as the sound output device 300 shown in Fig. 3, but is significantly different in that the sound output device 500 shown in Fig. 5 further includes a second sound output hole 513 (also called a sound adjustment hole).

[0051] Referring to FIG. 5, in some embodiments, the rear cavity 511 of the acoustic output device 500 may include a first sound output hole 512 and a second sound output hole 513 to further increase a frequency corresponding to a high-frequency resonance peak in a frequency response curve of a sound output hole (e.g., a first sound output hole). The first sound output hole 512 and the second sound output hole 513 may be located in a first side wall 5101 of the rear cavity 511, respectively. In some embodiments, the second sound output hole 513 and the first sound output hole 512 may be provided in the first side wall 5101 of the rear cavity 511. For example, the first sound output hole 512 is located in an upper wall of the housing structure 510 shown in FIG. 5, and the second sound output hole 513 is located in a lower wall of the housing structure 510 shown in FIG. A line connecting the first sound output hole 512 and the second sound output hole 513 may pass through the rear cavity 511. In some embodiments, the projection of the first sound emission hole 512 onto the lower wall of the housing structure 510 overlaps with the second sound emission hole 513. In some embodiments, the second sound emission hole 513 and the first sound emission hole 512 do not have to be provided opposite to each other. For example, the first sound emission hole 512 and the second sound emission hole 513 may be arranged to be offset along the length direction (from left to right in FIG. 5) of the peripheral side wall of the rear cavity 511. Also, for example, the first sound emission hole 512 and the second sound emission hole 513 are distributed along the peripheral direction of the peripheral side wall of the rear cavity 511. The position of the first side wall 5101 where the first sound emission hole 512 and the second sound emission hole 513 are located can be adaptively adjusted according to the shape of the housing structure 510. For example, if the housing structure 510 is a cylinder, the first side wall 5101 may be an annular peripheral side wall of the cylinder, and the first sound emission holes 512 and the second sound emission holes 513 may be located at different positions on the annular peripheral side wall of the cylinder. Also, for example, if the housing structure 510 is a rectangular parallelepiped, the first sound emission holes 512 and the second sound emission holes 513 may be located on four same or different peripheral side walls that are interconnected with each other of the first side wall 1101. In some embodiments, the first sound emission holes 512 are located on the first side wall 5101 of the housing structure 510, and the second sound emission holes 513 are located on the second side wall 5102 of the housing structure 510. In some embodiments, the number of the second sound emission holes 513 may be one or more.

[0052] 5 may further include an acoustic driver 520 and other structures, and the acoustic driver 520 may include a vibration membrane 521 and a magnetic circuit structure 5220. For more details of the vibration membrane 521 and the magnetic circuit structure 5220, reference may be made to other contents of this specification (e.g., FIGS. 3, 7, 8, 11, and their related descriptions), and therefore a description thereof will be omitted here.

[0053] Taking the example where the second sound emitting hole 513 and the first sound emitting hole 512 are respectively provided in the opposing first side walls 5101 of the rear cavity, the conditions for forming a standing wave in the rear cavity are as follows.

[0054]

number

[0055] Fig. 6 is a schematic diagram of a frequency response curve of the rear cavity of the sound output device according to Fig. 1, Fig. 3 and Fig. 5. As can be seen from Fig. 6, in the frequency response curve (corresponding to "curved structure and opposing sound emission hole" shown in Fig. 6) in the case where a curved structure is provided at the connection point between the first side wall and the second side wall and a second sound emission hole facing the first sound emission hole is formed in the first side wall of the housing structure, the high frequency resonance peak is located at point C, and the corresponding frequency is increased to 9 kHz or more, which is much higher than the frequency corresponding to the high frequency resonance peak (e.g., the high frequency resonance peak located at point A) of the rear cavity in the case where a curved structure is not provided at the connection point between the first side wall and the second side wall ("no curved structure" shown in Fig. 6) and the frequency corresponding to the high frequency resonance peak (e.g., the high frequency resonance peak located at point B) of the rear cavity in the case where a curved structure is provided at the connection point between the first side wall and the second side wall but a second sound emission hole is not formed ("curved rear cavity" shown in Fig. 6).

[0056] In some embodiments, the size of the sound output hole can be adjusted to improve the sound output effect of the sound output device at high frequencies. Specifically, the larger the size of the sound output hole, the further back the resonance peak in the frequency response of the sound output hole (or rear cavity) is located (i.e., the higher the response frequency). In some embodiments, the cross-sectional area of ​​the sound output hole is 0.25 mm 2 Preferably, the cross-sectional area of ​​the sound emission hole is 0.5 mm 2 Preferably, the cross-sectional area of ​​the sound emission hole is 1 mm 2 Preferably, the cross-sectional area of ​​the sound emission hole is 2 mm 2 Preferably, the cross-sectional area of ​​the sound emission hole is 4 mm 2 More preferably, the cross-sectional area of ​​the sound emission hole is 7 mm 2 More preferably, the cross-sectional area of ​​the sound emission hole is 10 mm 2In some embodiments, by setting the cross-sectional area of ​​the sound output hole, the frequency of the resonance peak in the frequency response of the sound output hole is 3 kHz or more, preferably, by setting the cross-sectional area of ​​the sound output hole, the frequency of the resonance peak in the frequency response of the sound output hole is 4 kHz or more, and more preferably, by setting the cross-sectional area of ​​the sound output hole, the frequency of the resonance peak in the frequency response of the sound output hole is 5 kHz or more.

[0057] In some embodiments, in order to reduce the effect of the pressure division action of the second sound emitting hole on the sound volume at the first sound emitting hole, the cross-sectional area of ​​the second sound emitting hole can be made equal to or smaller than the cross-sectional area of ​​the first sound emitting hole. Preferably, in order to reduce the effect of the pressure division action of the second sound emitting hole on the sound volume at the first sound emitting hole and ensure the standing wave suppression effect of the first sound emitting hole, the ratio of the cross-sectional area of ​​the second sound emitting hole to the cross-sectional area of ​​the first sound emitting hole may be set to 0.25 to 0.5. For example, when the cross-sectional area of ​​the first sound emitting hole is 4 mm 2 If so, the cross-sectional area of ​​the second sound emission hole is 1 mm 2 , 2mm 2 Or 4mm 2 The following values ​​may be used:

[0058] The numerical values ​​of the cross-sectional areas of the first sound emitting hole and the second sound emitting hole are merely illustrative. In the embodiment of the present application, the cross-sectional area of ​​the first sound emitting hole is 0.25 mm 2 The cross-sectional area of ​​the second sound output hole may be any numerical value equal to or less than the cross-sectional area of ​​the first sound output hole, and the present specification does not specifically limit this.

[0059] In some embodiments, sound leakage from the audio output device in the mid-low frequency band (e.g., 500 Hz to 3 kHz) can be reduced by adjusting the impedance of the sound output holes of the audio output device. For example, the first sound output hole 512 and / or the second sound output hole 513 may be provided with an acoustic attenuation structure (e.g., a structure such as a sound-tuning mesh, sound-tuning cotton, or sound guide tube) in order to further reduce the sound leakage volume in the mid-low frequency band of the audio output device by adjusting the amplitude of the frequency response corresponding to the two sound output holes and making the frequency response corresponding to the first sound output hole 512 and the frequency response corresponding to the front (vibration membrane) of the acoustic driver 520 closer within the mid-low frequency band range.

[0060] Fig. 7 is an exemplary schematic diagram of a sound output device according to another embodiment of the present application. The sound output device 600 shown in Fig. 7 has almost the same structure as the sound output device 500 shown in Fig. 5, but differs in that the sound output device 600 shown in Fig. 7 does not have a curved surface structure.

[0061] Referring to FIG. 7, in some embodiments, the rear cavity 611 of the audio output device 700 may include a first sound output hole 612 and a second sound output hole 613 to further increase a frequency corresponding to a high-frequency resonance peak in a frequency response curve of a sound output hole (e.g., a first sound output hole). The first sound output hole 612 and the second sound output hole 613 may be located in a first side wall 6101 of the rear cavity 611, respectively. In some embodiments, the second sound output hole 613 and the first sound output hole 612 may be provided in the first side wall 6101 of the rear cavity 611. For example, the first sound output hole 612 is located in the upper wall of the housing structure 510 shown in FIG. 7, and the second sound output hole 613 is located in the lower wall of the housing structure 610 shown in FIG. A line connecting the first sound output hole 612 and the second sound output hole 613 may pass through the rear cavity 611. In some embodiments, the projection of the first sound emission hole 612 onto the lower wall of the housing structure 610 overlaps with the second sound emission hole 613. In some embodiments, the second sound emission hole 613 and the first sound emission hole 612 do not have to be provided opposite to each other. For example, the first sound emission hole 612 and the second sound emission hole 613 may be arranged to be offset along the length direction (from left to right in FIG. 7) of the peripheral side wall of the rear cavity 611. Also, for example, the first sound emission hole 612 and the second sound emission hole 613 are distributed along the peripheral direction of the peripheral side wall of the rear cavity 611. The position of the first side wall 6101 where the first sound emission hole 612 and the second sound emission hole 613 are located can be adaptively adjusted according to the shape of the housing structure 610. For example, if the housing structure 610 is a cylinder, the first side wall 6101 may be an annular peripheral side wall of the cylinder, and the first sound emission holes 612 and the second sound emission holes 613 may be located at different positions on the annular peripheral side wall of the cylinder. Also, for example, if the housing structure 610 is a rectangular parallelepiped, the first sound emission holes 612 and the second sound emission holes 613 may be located on four same or different interconnected peripheral side walls of the first side wall 6101. In some embodiments, the first sound emission holes 612 are located on the first side wall 6101 of the housing structure 610, and the second sound emission holes 613 are located on the second side wall 6102 of the housing structure 510. In some embodiments, the number of the second sound emission holes 613 may be one or more.

[0062] 7 may further include an acoustic driver 620 and other structures, and the acoustic driver 620 may include a vibration membrane 61 and a magnetic circuit structure 6220. For more details of the vibration membrane 621 and the magnetic circuit structure 6220, reference may be made to other contents of this specification (e.g., FIGS. 3, 7, 8, 11, and their related descriptions), and therefore a description thereof will be omitted here.

[0063] Fig. 8 is an exemplary schematic diagram of an audio output device according to another embodiment of the present application. The audio output device 700 shown in Fig. 8 has almost the same structure as the audio output device 500 shown in Fig. 5, but differs in that a magnetic circuit structure 7220 of the audio output device 700 shown in Fig. 8 is different from the magnetic circuit structure 5220 shown in Fig. 5.

[0064] 8, in some embodiments, the magnetic circuit structure 7220 may include a magnetic flux conducting plate 7221 provided opposite the diaphragm 721. The magnetic flux conducting plate 7221 is provided with one or more third sound emitting holes 7222 (also called decompression holes). The third sound emitting holes 7222 can transmit sound generated by vibration of the diaphragm 721 from the rear surface of the acoustic driver 720 to the outside of the acoustic output device.

[0065] In some embodiments, the third sound output hole 7222 may include a first hole portion 72222 and a second hole portion 72221 provided in order from the inside to the outside. The first hole portion 72222 and the second hole portion 72221 are through-holes, and the size of the second hole portion 72221 is different from the size of the first hole portion 72222. For example, when the first hole portion 72222 and the second hole portion 72221 are both circular, the diameter of the second hole portion 72221 may be larger or smaller than the diameter of the first hole portion 72222. Note that the shapes of the first hole portion 72222 and the second hole portion 72221 of the third sound output hole 7222 described above are not limited to a circle, and may be a semicircle, a quarter circle, an ellipse, a semi-ellipse, a polygon, or the like, and are not further limited here.

[0066] In addition, when the third sound output hole 7222 is provided with the first hole portion 72222 and the second hole portion 72221, it is possible to adjust the frequency response when sound is output from the rear surface of the acoustic driver 720 to the outside (i.e., sound is output from the third sound output hole 7222 to the outside). In some alternative embodiments, the third sound output hole 7222 may be a hole portion whose cross-sectional area gradually increases or decreases from the inside to the outside. In some embodiments, a plurality of third sound output holes 7222 may be formed on the rear surface of the acoustic driver 720. The different third sound output holes 7222 may have the same or different structural settings. In some embodiments, the acoustic output device 300 and / or the acoustic output device 500 may have a magnetic circuit structure that is the same as or similar to the magnetic circuit structure 7220.

[0067] Fig. 9 is an exemplary schematic diagram of an audio output device according to another embodiment of the present application. An audio output device 800 shown in Fig. 9 has almost the same structure as the audio output device 700 shown in Fig. 8, but differs in that a magnetic circuit structure 8220 of the audio output device 800 shown in Fig. 9 is different from the magnetic circuit structure 7220 shown in Fig. 8.

[0068] As shown in FIG. 9, in some embodiments, the third sound output hole 8222 may further be provided with a sound guide tube 8223. The sound guide tube 8223 may be provided along a direction away from the diaphragm 821, that is, the sound guide tube 8223 may extend from the third sound output hole 8222 to the outside of the sound output device. In some embodiments, the sound guide tube 8223 can transmit the sound emitted from the third sound output hole 8222 to the rear cavity 811, and therefore the sound guide tube 8223 can transmit the sound emitted from the third sound output hole 8222 to the outside of the sound output device from the first sound output hole 812 and / or the second sound output hole 813. In some embodiments, the sound guide tube 8223 at the third sound output hole 8222 can adjust the frequency response when sound is emitted to the outside from the rear surface of the acoustic driver 820 (that is, sound is emitted to the outside from the third sound output hole 8222). For example, by adjusting the tube diameter or cross-sectional area of ​​the sound conduit, it is possible to adjust the frequency response corresponding to the sound conduit 8223. In some embodiments, the sound conduit 8223 may be a straight tube, or a tube structure whose cross-sectional area gradually increases along a direction away from the diaphragm 821. In some embodiments, the acoustic output device 300 and / or the acoustic output device 500 may have a magnetic circuit structure that is the same as or similar to the magnetic circuit structure 8220.

[0069] Fig. 10 is an exemplary schematic diagram of a sound output device according to another embodiment of the present application. The sound output device 900 shown in Fig. 10 has almost the same structure as the sound output device 500 shown in Fig. 5, but differs in that the sound output device 900 shown in Fig. 10 further includes a protective structure.

[0070] As shown in FIG. 10, in some embodiments, a protective structure 930 may be further provided on the outside of the vibrating membrane 921 to protect the vibrating membrane 921. The protective structure 930 may be fixedly connected to the housing structure 910. In some embodiments, the protective structure 930 is a structure that can transmit sound waves generated in front of the vibrating membrane 921 to the outside. For example, the protective structure 930 may be a filter structure. Also, for example, the protective structure 930 may be a plate structure having a hole or the like. In some embodiments, there is a certain gap between the protective structure 930 and the front of the vibrating membrane 921, and the gap can prevent the vibrating membrane 921 from colliding with the protective structure 930 during vibration. The type and structure of the vibrating membrane 921 can be referred to the vibrating membrane shown in FIG. 12 of the present application, and therefore the description will be omitted here. In some embodiments, the sound output device 300, the sound output device 500, the sound output device 600, the sound output device 700 and / or the sound output device 800 may have a protective structure that is the same as or similar to the protective structure 930.

[0071] Fig. 11 is an exemplary schematic diagram of an audio output device according to another embodiment of the present application. The audio output device 1000 shown in Fig. 10 has almost the same structure as the audio output device 500 shown in Fig. 5, but differs in that the audio output device 1000 shown in Fig. 11 further includes a front cavity.

[0072] As shown in FIG. 11, the acoustic output device 1000 may include a housing structure 1010 having a hollow interior, and an acoustic driver 1020 provided in the housing structure 1010. The acoustic driver 1020 may include a diaphragm 1021 and a magnetic circuit structure 10220. The acoustic driver 1020 may further include a voice coil (not shown). The voice coil may be fixed to a side of the diaphragm 1021 facing the magnetic circuit structure 10220, and may be located within a magnetic field formed by the magnetic circuit structure 10220. When energized, the voice coil vibrates under the action of the magnetic field, and can generate sound by driving the diaphragm 1021 to vibrate. For ease of explanation, the side of the diaphragm 1021 facing away from the magnetic circuit structure 10220 (i.e., the right side of the diaphragm 1021 in FIG. 10) may be regarded as the front side of the acoustic driver 1020, and the side of the magnetic circuit structure 10220 facing away from the diaphragm 1021 (i.e., the left side of the magnetic circuit structure 10220 in FIG. 11) may be regarded as the back side of the acoustic driver 1020. By vibration of the diaphragm 1021, the acoustic driver 1020 can emit sound to the outside from its front and back sides, respectively. As shown in FIG. 10, the front side or the diaphragm 1021 of the acoustic driver 1020 and the housing structure 1010 form a first cavity 1011 (also called a front cavity), and the back side of the acoustic driver 1020 and the housing structure 1010 form a second cavity 1012 (also called a rear cavity). Sound is emitted from the front of the acoustic driver 1020 into a first cavity 1011, and sound is emitted from the back of the acoustic driver 1020 into a second cavity 1012. In some embodiments, the housing structure 1010 may further include a first sound emission hole 1013, a second sound emission hole 1014, and a fourth sound emission hole 1015, where the fourth sound emission hole 1015 communicates with the first cavity 1011, and the first sound emission hole 1013 and the second sound emission hole 1014 communicate with the second cavity 1012. Sound emitted from the front of the acoustic driver 1020 is transmitted to the outside world from the fourth sound emission hole 1015, and sound emitted from the back of the acoustic driver 120 is transmitted to the outside world from the first sound emission hole 1013 and the second sound emission hole 1014.In some embodiments, the magnetic circuit structure 10220 may include a magnetic flux conducting plate 10221 provided opposite to the diaphragm. The magnetic flux conducting plate 10221 is formed with at least one third sound emitting hole 10222 (also called a decompression hole) that transmits the sound generated by the vibration of the diaphragm 1021 from the rear surface of the acoustic driver 1020 and transmits the sound from the second cavity 1012 to the outside world. The acoustic output device 1000 forms a specific sound field with a certain directivity by emitting sound from the fourth sound emitting hole 1015, the first sound emitting hole 1013, and the second sound emitting hole 1014. Note that the acoustic output device in the embodiments of the present specification is not limited to application to earphones, and may be applied to other audio output devices (e.g., hearing aids, megaphones, etc.). In some embodiments, the first cavity 1011 (front cavity) and its associated structures (e.g., the fourth sound output hole 1015) may also be applied to the above-mentioned audio output device 300, audio output device 500, audio output device 600, audio output device 700 and / or audio output device 800.

[0073] As with the first and second sound emission holes, in some embodiments, the fourth sound emission hole may be provided with a damping structure (e.g., a sound-adjusting mesh, sound-adjusting cotton, sound guide tube, or other structure) in order to adjust the amplitude of the frequency response corresponding to the sound emission hole and further reduce the sound leakage volume in the mid-low frequency band of the audio output device.

[0074] In addition, in the embodiments of the present application, the number of the first sound emitting hole, the second sound emitting hole, the third sound emitting hole, and the fourth sound emitting hole may be one or more, and a person skilled in the art can adaptively adjust the number and shape of the first sound emitting hole, the second sound emitting hole, the third sound emitting hole, and the fourth sound emitting hole according to a specific situation, and is not further limited here. In some embodiments, the sound output device may include other sound emitting holes other than the first sound emitting hole, the second sound emitting hole, the third sound emitting hole, and the fourth sound emitting hole.

[0075] 12 is an exemplary schematic diagram of a diaphragm of an audio output device according to some embodiments of the present application. In some embodiments, the different diaphragm examples illustrated in FIG. 12 may be applied to the audio output devices described elsewhere in the present application (e.g., audio output device 300, audio output device 500, audio output device 600, audio output device 700, audio output device 800, audio output device 900, audio output device 1000, etc.).

[0076] In some embodiments, the shape of the diaphragm also affects the volume of the cavity, and considering that the diaphragm of the acoustic driver has a certain amplitude when vibrating, it is necessary to ensure that the volume of the cavity is small and reserve a certain vibration space for the diaphragm to prevent the diaphragm from colliding with the housing structure when vibrating and causing distortion. Therefore, the gap from the tip of the diaphragm (i.e., the end face of the diaphragm facing the cavity) to the inner wall of the cavity facing the diaphragm must be larger than the amplitude of the diaphragm.

[0077] Based on the above conclusion, in some embodiments, the diaphragm may be a spherical diaphragm or a conical diaphragm. As shown in FIG. 12(a), when the diaphragm is a spherical diaphragm or a conical diaphragm, the tip of the diaphragm 1110 and the protrusion of the edge 1111 protruding outward are higher than other parts (i.e., the tip of the diaphragm 1110 is closer to the inner wall of the cavity), so the cavity needs to reserve extra volume to prevent the tip of the diaphragm 1110 from colliding with the inner wall of the cavity. In some embodiments, the diaphragm may be a planar diaphragm. In the embodiments of the present specification, the planar diaphragm may be a diaphragm whose shape is planar or nearly planar. As shown in FIG. 12(b), when the diaphragm is a planar diaphragm 1120, the gap between the planar diaphragm 1120 and the inner wall of the cavity opposite to its position is smaller than that of a spherical diaphragm or a conical diaphragm, which helps to reduce the volume of the cavity. However, since the edge 1121 protrudes outward relative to the planar diaphragm 1120, a certain distance must still be maintained between the planar diaphragm 1120 and the inner wall of the cavity opposite the position. As shown in Fig. 12(c), in some embodiments, in order to further reduce the distance between the diaphragm 1130 and the inner wall of the cavity, the edge 1131 of the diaphragm 1130 can be recessed away from the cavity, in which case the internal cavity of the housing structure does not need to reserve space for the edge 1131, thereby reducing the volume of the cavity and making the position of the high frequency resonance peak at the sound output hole of the cavity at a higher frequency, thereby improving the sound output effect of the sound output device.

[0078] FIG. 13 is a schematic diagram of the mounting effect of a sound output device according to some embodiments of the present application.

[0079] In some embodiments, when a user wears the acoustic output device, the wearing position of the acoustic output device may be on the upper torso of the user. For example, the wearing position is on the head and close to the ear. As shown in FIG. 13, a rectangular structure in the figure represents the acoustic output device. As shown in FIG. 13A and FIG. 13B, the sound output position of the acoustic output device (e.g., sound output hole, decompression hole or diaphragm) may be within the projection of the vector plane of the pinna (e.g., the concha cavity) or outside the projection of the vector plane of the pinna. As shown in FIG. 13C and FIG. 13D, the acoustic output device may be suspended in the ear canal by a corresponding structure (e.g., a hook) but does not block the ear canal.

[0080] FIG. 14 is an exemplary multi-view diagram of an audio output device according to some embodiments of the present application. As shown in FIG. 14, in some embodiments, the audio output device may be rectangular or substantially rectangular. In some embodiments, the audio output device may be applied to a head-mounted or ear-hanging device such as glasses. When a user wears a head-mounted or ear-hanging device such as glasses, the audio output device is located in front of the user's ear, with the surface shown in the rear view facing the user's face area (hereinafter, abbreviated as "facing the user"), the surface shown in the front view facing a position opposite the user's face area in the external environment (hereinafter, abbreviated as "facing outward"), and the surface shown in the right side view facing relatively toward the user's ear. In some embodiments, the audio output device includes a sound output hole 1310, a sound output hole 1311, a sound output hole 1320, and a sound output hole 1330. The sound output holes 1310 and 1311 are located on an outward sidewall (e.g., second sidewall 5102 in FIG. 5) of the housing structure shown in front view (the housing structure is shown in a three-dimensional structure in FIG. 14), and the sound output holes 1320 and 1330 are located on a user-facing sidewall of the housing structure (e.g., third sidewall 3103 in FIG. 3 or the right sidewall shown in FIG. 11). In some embodiments, the sound output holes 1310 and 1311 are rectangular in shape and are disposed parallel to the middle region of the outward sidewall of the sound output device. The sound output holes 1320 and 1330 may also be rectangular in shape and disposed vertically on the user-facing side of the housing structure in close proximity to the user's ears.

[0081] In some embodiments, the openings shown in the rear view (i.e., sound outlet 1320 and sound outlet 1330) may represent sound outlets of a front cavity of the sound output device (e.g., sound outlet 1015 shown in FIG. 11), which can transmit sound toward a person's ear. The openings shown in the front view (i.e., sound outlet 1310 and sound outlet 1311) may represent sound outlets of a rear cavity. The sound transmitted from the sound outlets of the front cavity and the sound outlets of the rear cavity forms a directional sound field, thereby achieving the effect of reducing sound leakage.

[0082] In some embodiments, a curved structure (not shown) is provided at a connection point between the side wall of the housing structure shown in the front view and a side wall adjacent to the side wall of the housing structure shown in the front view (e.g., the side wall of the housing structure shown in the top view, the side wall of the housing structure shown in the bottom view, the side wall of the housing structure shown in the right side view, and the side wall of the housing structure shown in the left side view (not shown)). The specific content of the curved structure can be referred to Figure 3 and its description in the specification of the present application, so the description will be omitted here.

[0083] 14 is merely illustrative, and in some embodiments, the sound output device may be non-rectangular, and may have other shapes, such as a cylindrical shape, a truncated cone shape, etc. In some embodiments, the sound output holes of the front cavity and the sound output holes of the rear cavity may be located on non-opposing surfaces, for example, in some embodiments, the sound output holes of the front cavity and the sound output holes of the rear cavity may be located on adjacent surfaces or the same surface. In some embodiments, the number of sound output holes of the front cavity and the sound output holes of the rear cavity may be one, two, or more than two.

[0084] In addition, the shapes and positions of the sound emission holes of the front cavity and the sound emission holes (and the sound adjustment holes) of the rear cavity are not limited to those shown in the drawings. For example, in some embodiments, the shapes of the sound emission holes of the front cavity and the sound emission holes and the sound adjustment holes of the rear cavity may be semicircular, quarter circular, elliptical, semi-elliptical, polygonal, or other irregular shapes.

[0085] FIG. 15 is an exemplary multi-view diagram of an audio output device according to another embodiment of the present application. As shown in FIG. 15, in some embodiments, the audio output device may be rectangular or substantially rectangular. In some embodiments, the audio output device may be applied to a head-mounted or ear-hanging device such as glasses. When a user wears a head-mounted or ear-hanging device such as glasses, the audio output device is located in front of the user's ear, with the surface shown in the rear view facing the user's face area (hereinafter, abbreviated as "facing the user"), the surface shown in the front view facing a position opposite the user's face area in the external environment (hereinafter, abbreviated as "facing outward"), and the surface shown in the right side view facing relatively toward the user's ear. In some embodiments, the audio output device includes a sound output hole 1410, a sound output hole 1411, and a sound output hole 1420. The sound output holes 1410 and 1411 are located in an outward sidewall of the housing structure (e.g., the second sidewall 5102 in FIG. 5), and the sound output holes 1420 are located in an edge where the sidewall of the housing structure facing the user (e.g., the third sidewall 3103 in FIG. 3 or the right sidewall in FIG. 11) intersects with the sidewall of the housing structure facing the user's ear. In some embodiments, the sound output holes 1410 and 1411 are rectangular in shape and are provided parallel to the middle region of the outward sidewall of the housing structure of the sound output device. The sound output holes 1420 include a surface facing the user and a surface facing the ear, and the surface facing the user and / or the surface facing the ear may be rectangular. In some embodiments, the sound output holes 1420 may be provided in the middle of the edge where the sidewall of the housing structure facing the user and the sidewall of the housing structure facing the user's ear intersect, or in a position close to the user's ear.

[0086] In some embodiments, the sound output hole 1420 may represent a sound output hole of a front cavity of an audio output device, and the sound output hole 1420 transmits sound in the direction of a person's ear and forms a directional sound field with the sound transmitted from the rear cavity sound output holes (i.e., sound output holes 1410 and 1411) formed in the rear cavity in the plane shown in the front view, thereby achieving the effect of reducing sound leakage.

[0087] In some embodiments, a curved structure (not shown) is provided at a connection point between the side wall of the housing structure shown in the front view and a side wall adjacent to the side wall of the housing structure shown in the front view (e.g., the side wall of the housing structure shown in the top view, the side wall of the housing structure shown in the bottom view, the side wall of the housing structure shown in the right side view, and the side wall of the housing structure shown in the left side view (not shown)). The specific content of the curved structure can be referred to Figure 3 and its description in the specification of the present application, so the description will be omitted here.

[0088] For more details such as the shapes, numbers, and positions of the sound emitting holes 1410, 1411, and 1420, please refer to FIG. 14 and its related description, and therefore the description will be omitted here.

[0089] FIG. 16 is an exemplary multi-view diagram of an audio output device according to another embodiment of the present application. As shown in FIG. 16, in some embodiments, the audio output device may be rectangular or substantially rectangular. In some embodiments, the audio output device may be applied to a head-mounted or ear-hanging device such as glasses. When a user wears a head-mounted or ear-hanging device such as glasses, the audio output device is located in front of the user's ear, with the surface shown in the rear view facing the user's face area (hereinafter, abbreviated as "facing the user"), the surface shown in the front view facing a position opposite the user's face area in the external environment (hereinafter, abbreviated as "facing outward"), and the surface shown in the right side view facing relatively toward the user's ear. In some embodiments, the audio output device includes a sound output hole 1510, a sound output hole 1511, and a sound output hole 1520. The sound output holes 1510 and 1511 are located on the side wall of the housing structure facing the outside (e.g., the second side wall 5102 shown in FIG. 5), and the sound output hole 1520 is located on the side wall of the housing structure facing the user's ear (e.g., the side wall of the first cavity 1011 in FIG. 11). In some embodiments, the sound output holes 1510 and 1511 are rectangular in shape and are provided parallel to the middle region of the side wall facing the outside of the sound output device. The sound output hole 1520 may be rectangular, and in some embodiments, the sound output hole 1520 may be provided in the middle position of the side wall of the housing structure facing the user's ear or in a position close to the user's ear. In some embodiments, the sound output hole 1520 may be parallel to the sound output holes 1510 and 1511.

[0090] In some embodiments, the sound output hole 1520 may represent a sound output hole of a front cavity of an audio output device, and the sound output hole 1520 transmits sound in the direction of a person's ear and forms a directional sound field with the sound transmitted from the sound output holes of the rear cavity (i.e., sound output holes 1510 and 1511) formed in the side wall corresponding to the front view of the housing structure, thereby achieving the effect of reducing sound leakage.

[0091] In some embodiments, a curved structure (not shown) is provided at a connection point between the side wall of the housing structure shown in the front view and a side wall adjacent to the side wall of the housing structure shown in the front view (e.g., the side wall of the housing structure shown in the top view, the side wall of the housing structure shown in the bottom view, the side wall of the housing structure shown in the right side view, and the side wall of the housing structure shown in the left side view (not shown)). The specific content of the curved structure can be referred to Figure 3 and its description in the specification of the present application, so the description will be omitted here.

[0092] For more details such as the shapes, numbers, and positions of the sound emitting holes 1510, 1511, and 1520, please refer to FIG. 14 and its related description, and therefore the description will be omitted here.

[0093] FIG. 17 is an exemplary multi-view diagram of an audio output device according to another embodiment of the present application. As shown in FIG. 17, in some embodiments, the audio output device may be rectangular or substantially rectangular. In some embodiments, the audio output device may be applied to a head-mounted or ear-hanging device such as glasses. When a user wears a head-mounted or ear-hanging device such as glasses, the audio output device is located in front of the user's ear, with the surface shown in the rear view facing the user's face area (hereinafter, abbreviated as "facing the user"), the surface shown in the front view facing a position opposite the user's face area in the external environment (hereinafter, abbreviated as "facing outward"), and the surface shown in the right side view facing relatively toward the user's ear. In some embodiments, the audio output device includes a sound output hole 1610, a sound output hole 1611, a sound output hole 1620, and a sound output hole 1630. The sound output holes 1610 and 1611 are located on the side wall of the housing structure facing the outside (e.g., the second side wall 5102 in FIG. 5), the sound output holes 1620 are located on the side wall of the housing structure facing the user (e.g., the side wall of the cavity 1011 in FIG. 11), and the sound output holes 1630 are located on the side wall of the housing structure facing the user's ear and on the side wall corresponding to the bottom view of the housing structure (e.g., the side wall of the first cavity 1011 in FIG. 11). In some embodiments, the sound output holes 1610 and 1611 are rectangular in shape and are located parallel to the middle region of the side wall facing the outside of the sound output device. The sound output holes 1620 may be rectangular, and in some embodiments, the sound output holes 1620 may be located in the middle of the surface facing the user or in a position close to the user's ear. The sound emission hole 1630 may include a first opening on the side of the housing structure facing the user's ear and a second opening on the side adjacent to the user's ear and perpendicular to the human body (i.e., the underside of the acoustic output device), both of which may be rectangular and connected to each other.

[0094] In some embodiments, the sound output holes 1620 and 1630 may represent sound output holes of the front cavity of the audio output device, through which sound is transmitted in the direction of a person's ears and forms a directional sound field together with the sound transmitted from the sound output holes of the rear cavity (i.e., sound output holes 1610 and 1611) formed in the side wall corresponding to the front view of the housing structure, thereby achieving the effect of reducing sound leakage.

[0095] In some embodiments, a curved structure (not shown) is provided at a connection point between the side wall of the housing structure shown in the front view and a side wall adjacent to the side wall of the housing structure shown in the front view (e.g., the side wall of the housing structure shown in the top view, the side wall of the housing structure shown in the bottom view, the side wall of the housing structure shown in the right side view, and the side wall of the housing structure shown in the left side view (not shown)). The specific content of the curved structure can be referred to Figure 3 and its description in the specification of the present application, so the description will be omitted here.

[0096] For more details such as the shape, quantity, and position of sound emission holes 1610, 1611, 1620, and 1630, please refer to FIG. 14 and its related description, so the description will be omitted here.

[0097] FIG. 18 is an exemplary multi-view diagram of an audio output device according to another embodiment of the present application. As shown in FIG. 18, in some embodiments, the audio output device may be rectangular or substantially rectangular. In some embodiments, the audio output device may be applied to a head-mounted or ear-hanging device such as glasses. When a user wears a head-mounted or ear-hanging device such as glasses, the audio output device is located in front of the user's ear, with the surface shown in the rear view facing the user's face area (hereinafter, abbreviated as "facing the user"), the surface shown in the front view facing a position opposite the user's face area in the external environment (hereinafter, abbreviated as "facing outward"), and the surface shown in the right side view facing relatively toward the user's ear. In some embodiments, the audio output device includes a sound output hole 1710, a sound output hole 1711, and a sound output hole 1720. The sound emission holes 1710 and 1711 are located on the side wall facing the outside of the housing mechanism (e.g., the second side wall 5102 shown in FIG. 5), and the sound emission holes 1720 are located on the side wall facing the user's ear of the housing structure and on the side wall corresponding to the bottom view (e.g., the side wall of the first cavity 1011 in FIG. 11). In some embodiments, the sound emission holes 1710 and 1711 are rectangular in shape and are provided parallel to the middle region of the side wall facing the outside of the sound output device. The sound emission holes 1720 may include a first opening on a surface facing the user's ear and a second opening on a side close to the user's ear and perpendicular to the human body (i.e., the bottom surface of the sound output device), and the first opening and the second opening may both be rectangular and communicate with each other.

[0098] In some embodiments, the sound output hole 1720 may represent a sound output hole of a front cavity of an audio output device, and the sound output hole 1720 transmits sound in the direction of a person's ear and forms a directional sound field with the sound transmitted from the sound output holes of the rear cavity (i.e., sound output holes 1710 and 1711) formed in the side wall corresponding to the front view of the housing structure, thereby achieving the effect of reducing sound leakage.

[0099] In some embodiments, a curved structure (not shown) is provided at a connection point between the side wall of the housing structure shown in the front view and a side wall adjacent to the side wall of the housing structure shown in the front view (e.g., the side wall of the housing structure shown in the top view, the side wall of the housing structure shown in the bottom view, the side wall of the housing structure shown in the right side view, and the side wall of the housing structure shown in the left side view (not shown)). The specific content of the curved structure can be referred to Figure 3 and its description in the specification of the present application, so the description will be omitted here.

[0100] FIG. 19 is an exemplary multi-view diagram of an audio output device according to another embodiment of the present application. As shown in FIG. 19, in some embodiments, the audio output device may be rectangular or substantially rectangular. In some embodiments, the audio output device may be applied to a head-mounted or ear-hanging device such as glasses. When a user wears a head-mounted or ear-hanging device such as glasses, the audio output device is located in front of the user's ear, with the surface shown in the rear view facing the user's face area (hereinafter, abbreviated as "facing the user"), the surface shown in the front view facing a position opposite the user's face area in the external environment (hereinafter, abbreviated as "facing outward"), and the surface shown in the right side view facing relatively toward the user's ear. In some embodiments, the audio output device includes a sound output hole 1810, a sound output hole 1820, and a sound output hole 1830. The sound emission hole 1810 is located on a side wall corresponding to a bottom view of the housing structure (e.g., the first side wall 5101 in FIG. 5), the sound emission hole 1820 is located on a side wall corresponding to a top view of the housing structure (e.g., the first side wall 5101 in FIG. 5), and the sound emission hole 1830 is located on a side wall facing the user's ear of the housing structure. In some embodiments, the shapes of the sound emission hole 1810, the sound emission hole 1820, and the sound emission hole 1830 may be rectangular, and the area of ​​the sound emission hole 1810 may be larger than the area of ​​the sound emission hole 1820.

[0101] In some embodiments, the sound output hole 1830 may represent a sound output hole of the front cavity of the sound output device, and the sound output hole 1830 transmits the sound toward the human ear, and forms a directional sound field with the sound transmitted from the sound output hole 1810 (sound output hole of the rear cavity) formed in the side wall corresponding to the bottom view of the housing structure, thereby achieving the effect of reducing sound leakage. In addition, the sound output hole 1820 (also called the tuning hole) is formed in the plane corresponding to the top view, which can suppress the formation of standing waves.

[0102] In some embodiments, a curved structure (not shown) is provided at a connection point between the side wall of the housing structure shown in the front view and a side wall adjacent to the side wall of the housing structure shown in the front view (e.g., the side wall of the housing structure shown in the top view, the side wall of the housing structure shown in the bottom view, the side wall of the housing structure shown in the right side view, and the side wall of the housing structure shown in the left side view (not shown)). The specific content of the curved structure can be referred to Figure 3 and its description in the specification of the present application, so the description will be omitted here.

[0103] For more details such as the shape, number, and position of the sound emitting holes 1810, 1820, and 1830, please refer to FIG. 14 and its related description, and therefore the description will be omitted here.

[0104] FIG. 20 is an exemplary multi-view diagram of an audio output device according to another embodiment of the present application. As shown in FIG. 20, in some embodiments, the audio output device may be rectangular or substantially rectangular. In some embodiments, the audio output device may be applied to a head-mounted or ear-hanging device such as glasses. When a user wears a head-mounted or ear-hanging device such as glasses, the audio output device is located in front of the user's ear, with the surface shown in the rear view facing the user's face area (hereinafter, abbreviated as "facing the user"), the surface shown in the front view facing a position opposite the user's face area in the external environment (hereinafter, abbreviated as "facing outward"), and the surface shown in the right side view facing relatively toward the user's ear. In some embodiments, the audio output device includes a sound output hole 1910, a sound output hole 1920, and a sound output hole 1930. The sound emission hole 1910 is located on a side wall corresponding to a top view of the housing structure (e.g., the first side wall 5101 in FIG. 5), the sound emission hole 1920 is located on a side wall corresponding to a bottom view of the housing structure (e.g., the first side wall 5101 in FIG. 5), and the sound emission hole 1930 is located on a side wall facing the user's ear of the housing structure. In some embodiments, the shapes of the sound emission hole 1910, the sound emission hole 1920, and the sound emission hole 1930 may be rectangular, and the area of ​​the sound emission hole 1910 may be larger than the area of ​​the sound emission hole 1920.

[0105] In some embodiments, the sound output hole 1930 may represent a sound output hole of a front cavity of the sound output device, and the sound output hole 1930 transmits sound toward a person's ear and forms a directional sound field with the sound transmitted from the sound output hole 1910 (sound output hole of the rear cavity) formed in the side wall corresponding to the top view of the housing structure, thereby achieving the effect of reducing sound leakage. In addition, the sound output hole 1920 (also called a tuning hole) can be formed in the plane corresponding to the bottom view to suppress the formation of standing waves.

[0106] In some embodiments, a curved structure (not shown) is provided at a connection point between the side wall of the housing structure shown in the front view and a side wall adjacent to the side wall of the housing structure shown in the front view (e.g., the side wall of the housing structure shown in the top view, the side wall of the housing structure shown in the bottom view, the side wall of the housing structure shown in the right side view, and the side wall of the housing structure shown in the left side view (not shown)). The specific content of the curved structure can be referred to Figure 3 and its description in the specification of the present application, so the description will be omitted here.

[0107] For more details such as the shape, number, and position of the sound emitting holes 1910, 1920, and 1930, please refer to FIG. 14 and its related description, and therefore the description will be omitted here.

[0108] FIG. 21 is an exemplary multi-view diagram of an audio output device according to another embodiment of the present application. As shown in FIG. 21, in some embodiments, the audio output device may be rectangular or substantially rectangular. In some embodiments, the audio output device may be applied to an open-type earphone (e.g., wired earphone, wireless earphone) device. When a user wears the open-type earphone device, the audio output device is located in the user's auricle, with the surface shown in the rear view facing the user's face area (hereinafter, abbreviated as "facing the user"), the surface shown in the top view facing a position opposite to the user's face area in the external environment (hereinafter, abbreviated as "facing outward"), and the surface shown in the bottom view facing the user's ear canal. In some embodiments, the audio output device includes a sound output hole 2010, a sound output hole 2020, and a sound output hole 2030. The sound emission hole 2010 is located in a side wall corresponding to the top view of the housing structure (e.g., the side wall of the first cavity 1011 shown in FIG. 11), the sound emission hole 2020 is located in a side wall corresponding to the bottom view of the housing structure (e.g., the second side wall 5102 shown in FIG. 5), and the sound emission hole 2030 is located in a side wall facing the user's ear canal of the housing structure and in a side wall corresponding to the bottom view of the housing structure (e.g., the side wall of the first cavity 1011 shown in FIG. 11). In some embodiments, the shape of the sound emission hole 2010 and the sound emission hole 2020 may be rectangular, and the area of ​​the sound emission hole 2010 may be larger than the area of ​​the sound emission hole 2020. The sound emission hole 2030 includes a first opening on a surface facing the user's ear and a second opening on a plane corresponding to the bottom view, and the first opening and the second opening may be rectangular and communicate with each other.

[0109] In some embodiments, the sound output hole 2030 may represent a sound output hole of a front cavity of an audio output device, and the sound output hole 2030 transmits sound in the direction of a person's ear, and forms a directional sound field with the sound transmitted from the sound output hole 2010 (sound output hole of the rear cavity) formed in the side wall corresponding to the top view of the housing structure, thereby achieving the effect of reducing sound leakage. A line connecting the center of the sound output hole (sound output hole 2030) of the front cavity and the center of the sound output hole (sound output hole 2010) of the rear cavity is approximately parallel to the user contact surface (the side wall of the housing structure shown in the rear view of FIG. 21). In some embodiments, approximately parallel here refers to an included angle between the line connecting the center of the sound output hole of the front cavity and the center of the sound output hole of the rear cavity and the user contact surface in a specific range. In some embodiments, the specific range may be 45 degrees or less, or 30 degrees or less, or 15 degrees or less.

[0110] In addition, by forming a sound emission hole 2020 (sound tuning hole) in the side wall corresponding to the bottom view of the housing structure, in combination with the sound emission hole 2010 (sound emission hole of the rear cavity), the formation of standing waves can be effectively suppressed.

[0111] It should be noted that the sound output devices according to the above-mentioned embodiments are merely illustrative, and in some embodiments, the sound output device may be non-rectangular, and may have other shapes, for example, a cylindrical shape, a truncated cone shape, etc. It should be noted that in some embodiments, the sound output holes of the front cavity and the sound output holes of the rear cavity may be located on surfaces that do not face each other, and for example, in some embodiments, the sound output holes of the front cavity and the sound output holes of the rear cavity may be located on adjacent surfaces or on the same surface.

[0112] In addition, the shapes and positions of the sound emission holes of the front cavity, the sound emission holes of the rear cavity, and the sound adjustment holes are not limited to those shown in the drawings. For example, in some embodiments, the shapes of the sound emission holes of the front cavity, the sound emission holes of the rear cavity, and the sound adjustment holes may be semicircular, quarter circular, elliptical, semi-elliptical, polygonal, or other irregular shapes.

[0113] Although the basic concept has been described above, it is clear to those skilled in the art that the detailed disclosure above is merely provided as an example and is not intended to limit the present application. Although not expressly described herein, those skilled in the art may make various changes, improvements and modifications to the present application. These changes, improvements and modifications are intended to be suggested by the present application and therefore are within the spirit and scope of the exemplary embodiments of the present application.

[0114] Furthermore, certain terms are used herein to describe embodiments of the present application. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the present application. Thus, it is emphasized and understood that references to two or more of "one embodiment" or "one embodiment" or "one alternative embodiment" in various parts of this specification do not necessarily all refer to the same embodiment. Also, certain features, structures, or characteristics in one or more embodiments of the present application may be combined as appropriate.

[0115] Also, as will be appreciated by those skilled in the art, aspects of the present application may be illustrated and described in several patentable classes or contexts, including any new and useful process, machine, manufacture, or combination of matter, or any new and useful improvement thereto. Thus, aspects of the present application may be implemented entirely in hardware, entirely in software (including firmware, resident software, microcode, etc.), or a combination of hardware and software. Any of the above hardware or software may be referred to as a "data block," "module," "engine," "unit," "assembly," or "system." Also, aspects of the present application may take the form of a computer program product embodied in one or more computer-readable medium(s) containing computer-readable program code.

[0116] The computer storage medium may include a propagated data signal, propagated on baseband or as part of a carrier wave, for carrying the computer program code. The propagated signal may include various forms, such as electromagnetic signals, optical signals, or suitable combinations. The computer storage medium may be any computer readable medium other than a computer readable storage medium, which may be connected to an instruction execution system, device, or equipment to realize the communication, propagation, or transmission of the program used. The program code on the computer storage medium may be transmitted via any suitable medium, including wireless, cable, fiber optic cable, RF, or similar media, or any combination of the above media.

[0117] The computer program code necessary for the operation of each part of this application may be coded in one or more programming languages, including object-oriented programming languages ​​such as Java, Scala, Smalltalk, Eiffel, JADE, Emerald, C++, C#, VB.NET, Python, traditional procedural programming languages ​​such as C, Visual Basic, Fortran 2003, Perl, COBOL 2002, PHP, ABAP, dynamic programming languages ​​such as Python, Ruby and Groovy, or other programming languages. The program code may run entirely on the user's computer, on the user's computer as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the latter case, the remote computer may be connected to the user's computer by any form of network, such as a local area network (LAN) or wide area network (WAN), may be connected to an external computer (e.g., via the Internet), may be in a cloud computing environment, may be used as a service, such as Software as a Service (SaaS).

[0118] Additionally, unless expressly stated in the claims, the order of enumeration of processing elements or sequences described herein, the use of alphanumeric characters, or the use of other designations, do not limit the order of procedures and methods of the present application. While the above disclosure describes through various examples what are presently believed to be various useful embodiments of the invention, it should be understood that such details are merely for the purpose of illustration and that the appended claims are not limited to the disclosed embodiments, but on the contrary are intended to cover all modifications and equivalent combinations that are within the spirit and scope of the embodiments of the present application. For example, the system assembly described above may be implemented by a hardware device, but may also be implemented as a software-only solution, for example, by installing the described system on an existing server or mobile device.

[0119] Similarly, in the foregoing description of embodiments of the present application, it should be understood that various features may be grouped together in a single embodiment, figure, or description for the purpose of streamlining the disclosure and facilitating an understanding of one or more embodiments of the invention. This method of disclosure, however, should not be interpreted as reflecting an intention that the claimed subject matter requires more features than are recited in each claim. In fact, an embodiment may include fewer than all features of a single embodiment disclosed above.

[0120] In some embodiments, numbers describing the number of components and attributes are used, and it is understood that the numbers describing such embodiments are modified in some instances by the modifiers "about," "approximately," or "substantially." Unless otherwise specified, "about," "approximately," or "substantially" indicate that the numbers may vary by ±20%. Thus, in some embodiments, all numerical parameters used in the specification and claims are approximations that may vary depending on the characteristics required for a particular embodiment. In some embodiments, the numerical parameters should be calculated taking into account the number of significant digits provided and ordinary rounding techniques should be applied. In some embodiments, the numerical ranges and parameters used to determine the ranges are approximations; however, in specific embodiments, such numerical values ​​are set as precisely as possible.

[0121] All patents, patent applications, published patent applications, and other materials, such as articles, books, specifications, publications, documents, etc., referenced in this application are incorporated herein by reference in their entirety, except for prosecution history documents that are inconsistent or inconsistent with the content of this application, and documents that may have a limiting effect on the broadest scope of the claims of this application (now or later related to this application). In addition, if the explanations, definitions, and / or use of terms in the accompanying materials of this application are inconsistent or inconsistent with the content set forth in this application, the explanations, definitions, and / or use of terms in this application shall control.

[0122] Finally, it should be understood that the embodiments described herein are merely illustrative of the principles of the embodiments of the present application. Other variations may be within the scope of the present application. Thus, by way of example, and not of limitation, alternative configurations of the embodiments of the present application may be considered consistent with the teachings of the present application. Thus, the embodiments of the present application are not limited to the embodiments expressly introduced and described herein. [Explanation of symbols]

[0123] 100 Audio output device 110 Housing structure 111 Rear cavity 112 No. 1 sound hole 120 audio ドライバ 121 Vibrating membrane 513 No. 2 sound hole 930 Protective Structure 1101 1st side wall 1102 Second side wall 1103 Side wall 3 1015 No. 4 sound hole 1111 エッジ 1120 Planar Vibrating Membrane 1220 Magnetic circuit structure 3111 Surface Construction 7221 Magnetic beam guide beam 7222 No. 3 sound hole 72222 No. 1 hole 72221 Hole 2 8223 Sound pipe

Claims

1. In the sound output device, an acoustic driver including a diaphragm and a magnetic circuit structure, wherein a side of the diaphragm facing away from the magnetic circuit structure forms a front surface of the acoustic driver, and a side of the magnetic circuit structure facing away from the diaphragm forms a back surface of the acoustic driver, and the acoustic driver emits sound to the outside from each of the front surface and the back surface by vibration of the diaphragm; a housing structure configured to mount the acoustic driver, the rear surface of the acoustic driver and the housing structure forming a rear cavity, different side walls of the rear cavity being connected by a curved structure; Including, When the acoustic output device is in a worn state, the acoustic output device is close to the ear canal but does not block the ear canal so that a front surface of the acoustic driver directly emits sound to the outside, the housing structure includes at least one sound emission hole, the at least one sound emission hole is located on at least a part of a side wall of the rear cavity, the at least one sound emission hole is acoustically coupled to the rear cavity, and transmits sound emitted from the acoustic driver to the rear cavity to the outside of the acoustic output device, the different side walls of the rear cavity include at least one of a first side wall and a second side wall; the at least one first side wall is located on a periphery of the housing structure; The second side wall is provided opposite to a rear surface of the acoustic driver, An acoustic output device characterized in that an end of the at least one first side wall away from the acoustic driver and an end of the second side wall are connected by the curved structure, and the at least one sound emission hole is located in the at least one first side wall.

2. The sound output device according to claim 1 , wherein the at least one sound emission hole is located in the at least one first side wall and includes a first sound emission hole and a second sound emission hole that are provided opposite to each other.

3. 3. The sound output device according to claim 2, wherein a cross-sectional area of ​​the second sound output hole is equal to or smaller than a cross-sectional area of ​​the first sound output hole.

4. The cross-sectional area of ​​the at least one sound emission hole is 0.25 mm ２ The sound output device according to any one of claims 1 to 3, characterized in that:

5. 5. The sound output device according to claim 1, wherein the at least one sound output hole is provided with an acoustic attenuation structure.

6. The acoustic output device described in any one of claims 1 to 5, characterized in that the magnetic circuit structure includes a magnetic flux conducting plate arranged opposite the vibration membrane, and the magnetic flux conducting plate includes at least one third sound emission hole that transmits sound generated by vibration of the vibration membrane from a rear surface of the acoustic driver.

7. 7. The acoustic output device according to claim 6, wherein a sound guide tube is provided in the at least one third sound emission hole along a direction away from the vibration membrane, and the sound guide tube transmits sound emitted from the at least one third sound emission hole to the rear cavity.

8. The acoustic output device according to claim 6 or 7, characterized in that the at least one third sound emission hole includes a first hole portion and a second hole portion arranged in order from the inside to the outside, the first hole portion and the second hole portion are penetrating, and a diameter of the second hole portion is larger than a diameter of the first hole portion.

9. 9. The acoustic output device according to claim 8, wherein the shape of the diaphragm is planar or nearly planar.

10. 10. The audio output device of claim 9, wherein the diaphragm is secured to the audio driver by an edge that is recessed away from the rear cavity.

11. 11. The acoustic output device according to claim 1, further comprising a protective structure provided on a front surface of the acoustic driver so as to face the diaphragm.

12. 12. The sound output device according to claim 11, wherein the protective structure is configured to isolate the diaphragm from the outside world and to transmit sound generated by the diaphragm to the outside world.

13. The acoustic output device described in any one of claims 1 to 12, characterized in that the front side of the acoustic driver and the housing structure form a front cavity, the housing structure includes at least one fourth sound guide hole, and the fourth sound guide hole transmits sound generated by the vibration membrane from the front side of the acoustic driver to the outside of the acoustic output device.

Images