Acoustic output device

Abstract

Acoustic output device, comprising: an acoustic bone conduction assembly for generating bone conduction sound waves; an acoustic air duct assembly for generating air duct sound waves; and A housing for receiving at least part of the acoustic bone conduction assembly and the acoustic air conduction assembly, wherein the housing comprises a first chamber and a second chamber, wherein the first chamber is used to receive at least part of the acoustic bone conduction assembly, wherein the housing is provided with a sound outlet opening which communicates with the second chamber, wherein the air conduction sound waves are transmitted through the sound outlet opening to the environment of the acoustic output device, wherein the housing is further provided with at least one sound regulating opening which communicates with the second chamber, and wherein a peak resonance frequency of the resonance peak in an open state of the at least one sound regulating opening is shifted towards higher frequencies compared to a peak resonance frequency of the resonance peak in a closed state of the at least one sound regulating opening.

Description

CROSS-REFERENCE

[0001] The present utility model claims priority over the Chinese application with application number 2021103834522, filed on April 9, 2021, the contents of which are hereby incorporated by reference. TECHNICAL AREA

[0002] The present utility model relates to the field of acoustic output, in particular to an acoustic output device. STATE OF THE ART

[0003] Currently, portable devices with acoustic output devices are emerging and enjoying increasing popularity. In particular, due to their health and safety features, open-ear acoustic output devices (e.g., bone conduction speakers) are increasingly being used to enhance sound transmission to the user. However, bone conduction speakers do exhibit some sound loss in the low to mid-frequency range.

[0004] Therefore, it is desirable to provide an acoustic output device that can reduce sound loss and improve the user's acoustic experience. REVELATION OF THE INVENTION

[0005] The embodiments of the present application provide an acoustic output device comprising: an acoustic bone conduction assembly for generating bone conduction sound waves; an acoustic air conduction assembly for generating air conduction sound waves; and a housing for receiving at least a part of the acoustic bone conduction assembly and the acoustic air conduction assembly, wherein the housing comprises a first chamber and a second chamber, the first chamber being used to receive at least a part of the acoustic bone conduction assembly, the housing being provided with a sound outlet opening that communicates with the second chamber, and wherein the air conduction sound waves are transmitted through the sound outlet opening to the surroundings of the acoustic output device;and wherein the air-conducted sound waves exhibit a frequency response curve with one or more resonance peaks, the peak resonance frequency of which is greater than or equal to 1 kHz.

[0006] In some embodiments, the acoustic air conduction assembly comprises at least one membrane, wherein the at least one membrane is connected to the acoustic bone conduction assembly or the housing, wherein the air conduction sound waves can be generated due to the vibration of the at least one membrane or the housing.

[0007] In some embodiments, the at least one membrane separates the chamber of the housing into the first chamber and the second chamber.

[0008] In some embodiments, the housing is further provided with at least one pressure relief opening which communicates with the first chamber.

[0009] In some embodiments, the at least one pressure relief opening comprises a first pressure relief opening and a second pressure relief opening, wherein the first pressure relief opening is located further away from the sound outlet opening than the second pressure relief opening, and wherein the effective area of ​​an outlet end of the first pressure relief opening is larger than the effective area of ​​an outlet end of the second pressure relief opening.

[0010] In some embodiments, the sound outlet opening and the first pressure relief opening are located on two opposite sides of the acoustic bone conduction assembly.

[0011] In some embodiments, the housing comprises a first side wall and a second side wall located on two opposite sides of the acoustic bone conduction assembly, as well as a third side wall and a fourth side wall connecting the first side wall to the second side wall and being spaced apart from each other, wherein the sound outlet opening or the first pressure relief opening is provided on the first side wall or the second side wall, respectively, and wherein the second pressure relief opening is provided in the third side wall or the fourth side wall.

[0012] In some embodiments, the at least one pressure relief opening further comprises a third pressure relief opening, wherein the effective area of ​​the outlet end of the second pressure relief opening is larger than the effective area of ​​an outlet end of the third pressure relief opening, and wherein the second pressure relief opening or the third pressure relief opening is provided in the third side wall or the fourth side wall, respectively.

[0013] In some embodiments, the actual area of ​​the outlet end of the first pressure relief opening is larger than the actual area of ​​the outlet end of the second pressure relief opening, wherein the actual area of ​​the outlet end of the second pressure relief opening is larger than the actual area of ​​the outlet end of the third pressure relief opening.

[0014] In some embodiments, the housing is further provided with at least one sound regulating opening which communicates with the second chamber, wherein a peak resonance frequency of the resonance peak in an open state of the at least one sound regulating opening is shifted to higher frequencies compared to a peak resonance frequency of the resonance peak in a closed state of the at least one sound regulating opening.

[0015] In some embodiments, the shift amount towards higher frequencies is greater than or equal to 500 Hz.

[0016] In some embodiments, the shift amount towards higher frequencies is greater than or equal to 1 kHz.

[0017] In some embodiments, the peak resonance frequency of the resonance peak in the open state of the at least one sound regulating opening is greater than or equal to 2 kHz.

[0018] In some embodiments, the sum of the effective areas of the outlet ends of all sound-regulating openings is greater than or equal to 1.5 mm². 2 .

[0019] In some embodiments, the core housing comprises a first side wall and a second side wall located on two opposite sides of the acoustic bone conduction assembly, wherein the at least one sound regulating opening comprises a first sound regulating opening, wherein the sound outlet opening or the first sound regulating opening is provided in the first side wall or the second side wall, respectively.

[0020] In some embodiments, the housing further comprises a third side wall and a fourth side wall, which connect the first side wall and the second side wall and are spaced apart from each other, wherein the at least one sound regulating opening further comprises a second sound regulating opening, wherein the second sound regulating opening is provided in the third side wall or the fourth side wall.

[0021] In some embodiments, the effective area of ​​an outlet end of the first sound regulating opening is larger than the effective area of ​​an outlet end of the second sound regulating opening.

[0022] In some embodiments, the actual area of ​​the outlet end of the first sound control opening is larger than the actual area of ​​the outlet end of the second sound control opening.

[0023] In some embodiments, the actual area of ​​the outlet end of the first sound regulation opening is greater than or equal to 3.8 mm. 2 is; and / or that the actual area of ​​the outlet end of the second sound regulation opening is greater than or equal to 2.8 mm² 2 is.

[0024] In some embodiments, the outlet ends of the first sound regulating opening and the second sound regulating opening are each covered with a sound-absorbing mesh whose porosity is less than or equal to 16%.

[0025] In some embodiments, the housing is provided with at least one pressure relief opening which communicates with the first chamber, wherein at least part of the sound control openings is arranged adjacent to at least part of the at least one pressure relief opening, and the distance between a sound control opening and an adjacent pressure relief opening is less than or equal to 2 mm.

[0026] In some embodiments, for the sound regulating opening and the adjacent sound regulating opening, the effective area of ​​the outlet end of the pressure relief opening is larger than the effective area of ​​the outlet end of the sound regulating opening.

[0027] In some embodiments, for the pressure relief opening and the sound regulation opening that are arranged adjacently, the actual area of ​​the outlet end of the pressure relief opening is larger than the actual area of ​​the outlet end of the sound regulation opening; and / or the outlet ends of the pressure relief opening and the sound regulation opening that are arranged adjacently are covered with a first sound-absorbing mesh and a second sound-absorbing mesh, respectively, wherein the porosity of the first sound-absorbing mesh is greater than the porosity of the second sound-absorbing mesh.

[0028] In some embodiments, for the pressure relief opening and the sound regulation opening, which are arranged adjacently, the ratio of the effective area of ​​the outlet end of the pressure relief opening to the effective area of ​​the outlet end of the sound regulation opening is less than or equal to 2.

[0029] In some embodiments, a frequency response curve of an air conduction sound emitted to the environment of the acoustic output device through the at least one pressure relief opening has a first resonance peak, wherein a frequency response curve of an air conduction sound emitted to the environment of the acoustic output device through the sound regulating opening has a second resonance peak, wherein the first resonance peak and the second resonance peak each have a peak resonance frequency greater than or equal to 2 kHz.

[0030] In some embodiments, the ratio of the difference between the peak resonance frequency of the first resonance peak and the peak resonance frequency of the second resonance peak to the peak resonance frequency of the first resonance peak is less than or equal to 60%.

[0031] In some embodiments, the peak resonance frequency of the first resonance peak and the peak resonance frequency of the second resonance peak are each greater than or equal to 3.5 kHz.

[0032] In some embodiments, the difference between the peak resonance frequency of the first resonance peak and the peak resonance frequency of the second resonance peak is less than or equal to 2 kHz.

[0033] In some embodiments, the acoustic output device further comprises a sound guide component connected to the housing, wherein the sound guide component is provided with a sound conduction channel which communicates with the sound outlet opening and is used to guide the air-conducted sound waves to the surroundings of the acoustic device.

[0034] In some embodiments, the sound conduction channel has a length between 2 mm and 5 mm.

[0035] In some embodiments, the sound conduction channel has a cross-sectional area greater than or equal to 4.8 mm². 2 on.

[0036] In some embodiments, the cross-sectional area of ​​the sound conduction duct gradually increases in one transmission direction of the air conduction sound waves.

[0037] In some embodiments, the cross-sectional area of ​​an inlet end of the sound conduction duct is greater than or equal to 10 mm². 2 is; or that the cross-sectional area of ​​an outlet end of the sound conducting duct is greater than or equal to 15 mm² 2 is.

[0038] In some embodiments, the ratio of the volume of the sound conduction channel to the volume of the second chamber is between 0.05 and 0.9.

[0039] In some embodiments, in one vibration direction of the acoustic bone conduction assembly, the distance between an exit end of the sound conduction channel and an inner wall of the housing facing away from a skin contact area is greater than or equal to 3 mm.

[0040] In some embodiments, the exit end of the sound conduction channel is covered with a sound-absorbing mesh whose porosity is greater than or equal to 13%.

[0041] In some embodiments, the housing is provided with a communication with the first chamber, wherein the effective area of ​​the outlet end of the sound conduction channel is greater than or equal to the sum of the effective areas of the outlet ends of all pressure relief openings that communicate with the first chamber on the housing.

[0042] In some embodiments, the ratio of the sum of the effective areas of the outlet ends of all pressure relief openings to the effective area of ​​the outlet end of the sound conduction duct is greater than or equal to 0.15.

[0043] In some embodiments, the porosity of the sound-absorbing mesh at the outlet end of the sound conduction duct is greater than or equal to the porosity of the sound-absorbing mesh at the outlet ends of at least some of the pressure relief openings.

[0044] In some embodiments, the housing is provided with sound regulating openings that communicate with the second chamber, wherein the effective area of ​​the exit end of the sound conduction channel is larger than the effective area of ​​the exit end of each of the sound regulating openings.

[0045] In some embodiments, the effective area of ​​the outlet end of the sound conduction channel is larger than the sum of the effective areas of the outlet ends of all sound regulating openings.

[0046] In some embodiments, the ratio of the sum of the effective areas of the outlet ends of all sound regulating openings to the effective area of ​​the outlet end of the sound conducting duct is greater than or equal to 0.08.

[0047] In some embodiments, the porosity of the sound-absorbing mesh at the exit end of the sound conduction channel is greater than the porosity of the sound-absorbing mesh at the exit ends of the sound regulating openings.

[0048] In some embodiments, the acoustic bone conduction assembly comprises a magnetic circuit system and a coil assembly, wherein the magnetic circuit system forms a magnetic gap, wherein the coil assembly is arranged in the first chamber and projects into the magnetic gap, and wherein a communication opening is provided in the coil assembly.

[0049] In some embodiments, the communication opening is located in a part of the coil assembly that is outside the magnetic gap.

[0050] In some embodiments, the coil assembly comprises a coil and a coil support, wherein the coil support is used to connect the coil to the housing and allows the coil to protrude into the magnetic gap, with the communication opening being provided in the coil support.

[0051] In some embodiments, the acoustic bone conduction assembly further comprises an elastic element located in the first chamber, wherein a central region of the elastic element is connected to the magnetic circuit system and a circumferential region of the elastic element is connected to the housing, thereby suspending the magnetic circuit system within the core housing.

[0052] In some embodiments, the coil support comprises a main body and a first support section, wherein the main body is connected to the elastic element, wherein one end of the first support section is connected to the main body, wherein the coil is connected to the other end of the first support section facing away from the main body, and wherein the communication opening is located at a connection point between the main body and the first support section.

[0053] In some embodiments, several communication openings are provided, which are spaced apart in a circumferential direction of the coil assembly.

[0054] In some embodiments, each of the communication openings has a cross-sectional area greater than or equal to 2 mm². 2 on.

[0055] In some embodiments, the housing is provided with a pressure relief opening which communicates with the first chamber, wherein a frequency response curve of an air conduction sound which is emitted through the pressure relief opening to the environment of the acoustic output device has a resonance peak, wherein the provision of the communication opening enables the resonance peak to have a peak resonance frequency of greater than or equal to 2 kHz.

[0056] In some embodiments, the peak resonance frequency of the resonance peak in an open state of the communication port is shifted to higher frequencies compared to the peak resonance frequency of the resonance peak when no communication port is provided, with the amount of the shift being greater than or equal to 500 Hz.

[0057] In some embodiments, the acoustic output device further comprises a communication channel through which the first chamber and the second chamber communicate, wherein a peak resonance frequency of the resonance peak in an open state of the communication channel is shifted to higher frequencies compared to a peak resonance frequency of the resonance peak in a closed state of the communication channel, and the amount of the shift is greater than or equal to 500 Hz.

[0058] In some embodiments, a frequency response curve of an air conduction sound emitted through the sound outlet opening to the surroundings of the acoustic output device exhibits a resonance peak with a peak resonance frequency greater than or equal to 2 kHz.

[0059] In some embodiments, the communication channel comprises an array of openings provided in the membrane, wherein at least some of the openings in the array of openings and the sound exit opening are located on two opposite sides of the acoustic bone conduction assembly.

[0060] In some embodiments, the actual area of ​​at least one opening in the array of openings is between 0.01 mm². 2 and 0.04 mm 2 .

[0061] In some embodiments, the acoustic bone conduction assembly comprises a magnetic circuit system and a coil assembly, wherein the magnetic circuit system forms a magnetic gap, the coil assembly is arranged in the first chamber and extends into the magnetic gap, and the communication channel runs through the magnetic circuit system to bring the first chamber into communication with the second chamber.

[0062] In some embodiments, the housing is further provided with a pressure relief opening that communicates with the first chamber and a sound regulation opening that communicates with the second chamber, wherein the communication channel is arranged outside the housing and brings the pressure relief opening into communication with the sound regulation opening.

[0063] In some embodiments, a sound-absorbing network is provided on a communication path defined by the communication channel, the porosity of which is less than or equal to 18%. BRIEF DESCRIPTION OF THE FIGURES

[0064] The present application is further explained by reference to exemplary embodiments, which are described in detail with reference to the accompanying drawings. These embodiments are not limiting. In the embodiments, the same structure is designated with the same reference numeral. These show: Fig. 1 a schematic view of an acoustic output system according to some embodiments of the present application; Fig. 2 a schematic view of an acoustic output device according to some embodiments of the present application; Fig. 3 a frame diagram of an acoustic output device according to some embodiments of the present application; Fig. 4 a schematic view of an acoustic output device according to some embodiments of the present application; Fig. 5 a schematic comparison diagram of frequency response curves of an acoustic output device before and after the provision of a diaphragm according to some embodiments of the present application; Fig. 6 a schematic view of an acoustic output device according to some further embodiments of the present application; Fig. 7A an exemplary structural view of a sound-guiding component according to some embodiments of the present application; Fig. 7B an exemplary structural view of a sound-guiding component according to some embodiments of the present application; Fig. 7C an exemplary structural view of a sound-guiding component according to some embodiments of the present application; Fig. 7D an exemplary structural view of a sound-guiding component according to some embodiments of the present application; Fig. 7E an exemplary structural view of a sound-guiding component according to some embodiments of the present application; Fig. 8 a schematic top view of the structure of a sound-absorbing network according to some embodiments of the present application; Fig. 9 a schematic diagram of the frequency response curves of air-conducted sound waves at a sound-guiding component according to some embodiments of the present application; Fig. 10 a schematic diagram of the frequency response curves of air-conducted sound waves emitted through a sound outlet opening to the surroundings of an acoustic output device, according to some embodiments of the present application; Fig. 11 a schematic diagram of the frequency response curves of air-conducted sound waves emitted through a pressure relief opening to the environment of an acoustic output device, according to some embodiments of the present application; Fig. 12A a schematic view of a sound pressure distribution in a second chamber of an acoustic output device without sound regulating openings according to some embodiments of the present application; Fig. 12B a schematic view of a sound pressure distribution in a second chamber of an acoustic output device with a sound regulating opening according to some embodiments of the present application; Fig. 13 a schematic diagram of the frequency response curves of air-conducted sound waves at a sound-guiding component according to some embodiments of the present application; Fig. 14 a schematic diagram of the frequency response curves of air-conducted sound waves at a sound-guiding component according to some further embodiments of the present application; Fig. 15 a schematic diagram of the frequency response curves for the sound loss of an acoustic output device according to some embodiments of the present application; Fig. 16A a sectional view of an acoustic output device according to some embodiments of the present application; Fig. 16B a sectional view of an acoustic output device according to some embodiments of the present application; Fig. 16C a left side view of an acoustic output device according to some embodiments of the present application; Fig. 16D a top view of an acoustic output device according to some embodiments of the present application; Fig. 17 a schematic structural view of a cross-section of an acoustic bone conduction assembly according to some embodiments of the present application; Fig. 18A a schematic structural view of principles of an acoustic output device according to some further embodiments of the present application; Fig. 18B a schematic structural view of principles of an acoustic output device according to some further embodiments of the present application; Fig. 19 a schematic comparison diagram of the frequency response curves of air-conducted sound waves before and after the provision of a communication opening on an acoustic output device according to some embodiments of the present application; Fig. 20A a schematic structural view of a membrane according to some embodiments of the present application; Fig. 20B a schematic structural view of an acoustic output device according to some embodiments of the present application; Fig. 20C a schematic structural view of an acoustic output device according to some embodiments of the present application; Fig. 21 a schematic diagram of the frequency response curves of air-conducted sound waves at a sound-guiding component according to some embodiments of the present application; Fig. 22 a schematic diagram of the frequency response curves of air-conducted sound waves at a sound-guiding component according to some further embodiments of the present application; Fig. 23 a schematic diagram of the frequency response curves of air-conducted sound waves at a sound-guiding component according to some further embodiments of the present application; Fig. 24 a schematic view of different positions relative to an acoustic output device according to some embodiments of the present application; Fig. 25 a schematic view of leakage frequency response curves of an acoustic output device at different positions Fig. 22 according to some embodiments of the present application; Fig. 26 a schematic view of leakage frequency response curves of an acoustic output device at different positions Fig. 22 according to some embodiments of the present application; Fig. 27 a schematic view of leakage frequency response curves of an acoustic output device at different positions Fig. 22 according to some embodiments of the present application; Fig. 28 a schematic view of leakage frequency response curves of an acoustic output device at different positions Fig. 22 according to some embodiments of the present application; Fig. 29 a schematic view of leakage frequency response curves of an acoustic output device at different positions Fig. 22 according to some embodiments of the present application; Fig. 30 a schematic view of leakage frequency response curves of various acoustic output devices at the same position Fig. 22 according to some embodiments of the present application; Fig. 31 a schematic view of leakage frequency response curves of various acoustic output devices at the same position Fig. 22 according to some embodiments of the present application; Fig. 32 a schematic view of leakage frequency response curves of various acoustic output devices at the same position Fig. 22 according to some embodiments of the present application; Fig. 33 a schematic view of leakage frequency response curves of various acoustic output devices at the same position Fig. 22 according to some embodiments of the present application. DETAILED EXECUTION FORMS

[0065] To clarify the technical solutions of the embodiments of the present application, the figures necessary for describing these embodiments are briefly presented. Obviously, the figures described below represent only a few examples or embodiments of the present application. With the help of these figures, a person skilled in the art in this field can apply the present application to other similar scenarios without inventive step. Unless otherwise stated or understood from the context, the same reference numerals in the figures refer to the same structures or operations.

[0066] It should be understood that the terms "system," "device," "unit," and / or "module" used herein serve to distinguish between different components, elements, parts, sections, or assemblies at various levels. However, where other words can serve the same purpose, these terms may be substituted.

[0067] As shown in the present application and in the claims, the terms "a" and / or "the" need not necessarily refer to the singular form, but may also include the plural form, unless the context clearly indicates otherwise. In general, the terms "comprise" and "contain" only indicate that the specifically identified steps and elements are included, that these steps and elements do not constitute an exclusive list, and that further steps or elements may be included in the method or apparatus.

[0068] In the present application, flowcharts are used to describe the processes performed by the system according to the embodiments described in the present application. It should be understood that preceding or subsequent processes do not necessarily have to be executed in the exact order shown. Rather, the individual steps can be processed in reverse order or simultaneously. Furthermore, additional processes can be added to these processes, or one or more steps can be removed from them.

[0069] The embodiments described herein relate to an acoustic output device. The acoustic output device may include an acoustic bone conduction assembly, an acoustic air conduction assembly, and a housing for receiving at least some elements of the acoustic bone conduction assembly and the acoustic air conduction assembly. In some embodiments, the acoustic bone conduction assembly may be used to generate bone conduction sound waves. If the acoustic bone conduction assembly generates bone conduction sound waves, the acoustic air conduction assembly may generate air conduction sound waves based on the vibration of the housing and / or the acoustic bone conduction assembly. In some embodiments, by providing one or more acoustic structures in the acoustic output device (e.g.,(Sound outlet opening, pressure relief opening, sound regulation opening, sound conduction channel, communication opening, etc.) improve the quality of the sound emitted by the acoustic output device, enrich the sound of the acoustic output device at mid and low frequencies, and reduce sound loss from the acoustic output device, thereby improving the user's audio experience. For example, the housing of the acoustic output device may comprise a first chamber, which may also be called the front chamber, and a second chamber, which may also be called the rear chamber, wherein a sound outlet opening may be provided on the housing that communicates with the second chamber, and wherein air-conducted sound waves can be transmitted through the sound outlet opening to the environment of the acoustic output device.In some embodiments, the frequency response curve of the air-conducting sound waves may exhibit one or more resonance peaks, the peak resonance frequency of which may be greater than or equal to 1 kHz. As another example, at least one pressure relief orifice may be provided on a side wall of the housing of the acoustic output device, communicating with the first chamber. The pressure relief orifice can regulate the pressure in the first chamber by facilitating communication between the first chamber and the environment of the acoustic output device, thus helping to regulate the frequency response of the acoustic air-conducting assembly at low frequencies. In some embodiments, the number, size, shape, position, etc., of one or more acoustic structures in the acoustic output device (e.g., sound outlet orifice, pressure relief orifice, sound regulation orifice, sound conduction duct, communication orifice, etc.) may be varied.) can be adjusted to optimize the frequency response curve of the acoustic output device and thereby improve the quality of the sound emitted by the acoustic output device. For example, the distance between the pressure relief orifice communicating with the first chamber and the sound regulation orifice communicating with the second chamber in the acoustic output device can be comparatively small (e.g., the pressure relief orifice and the sound regulation orifice can be directed to the environment of the acoustic output device), preferably in a high-frequency band (e.g., 2 kHz to 4 kHz), thereby reducing the sound loss of the acoustic output device and improving the sound quality of the acoustic output device.

[0070] Fig. Figure 1 shows a schematic view of an acoustic output system according to some embodiments of the present application. As in Fig. As shown in Figure 1, the acoustic output system 100 can comprise a multimedia platform 110, a network 120, an acoustic output device 130, a user terminal device 140 and a storage device 150.

[0071] The multimedia platform 110 can communicate with one or more components of the acoustic output system 100 or with an external data source (such as a cloud data center). In some embodiments, the multimedia platform 110 can provide data or signals (e.g., audio data from music) to the acoustic output device 130 and / or the user terminal 140. In some embodiments, the multimedia platform 110 can be used for data / signal processing by the acoustic output device 130 and / or the user terminal 140. In some embodiments, the multimedia platform 110 can be implemented on a single server or a group of servers. The server group can be a centralized server group connected to the network 120 via one or more access points through a distributed server group.In some embodiments, the multimedia platform 110 can be connected locally to the network 120 or remotely to the network 120. For example, the multimedia platform 110 can access information and / or data stored in the acoustic output device 130, the user terminal 140, and / or the storage device 150 via the network 120. As another example, the storage device 150 can be used as backend data storage for the multimedia platform 110. In some embodiments, the multimedia platform 110 can be implemented on a cloud platform. For example, the cloud platform can be a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an internal cloud, a multi-layer cloud, etc., or any combination thereof.

[0072] In some embodiments, the multimedia platform 110 may include a processing device 112. The processing device 112 may perform the main functions of the multimedia platform 110. For example, the processing device 112 may retrieve audio data from the storage device 150 and send the retrieved audio data to the acoustic output device 130 and / or the user terminal 140 to generate sound. In other embodiments, the processing device 112 may process signals from the acoustic output device 130, for example, generate control signals.

[0073] In some embodiments, the processing device 112 may comprise one or more processing units, such as a single-core processor or a multi-core processor. For illustrative purposes only, the processing device 112 may include a central processing unit (CPU), an application-specific integrated circuit (ASIC), an application-specific instruction set processor (ASIP), a graphics processing unit (GPU), a physical processing unit (PPU), a digital signal processor (DSP), a field-programmable gate array (FPGA), a programmable logic device (PLD), a control unit, a microcontroller unit, a reduced instruction set computer (RISC), a microprocessor, etc., or any combination thereof.

[0074] The network 120 can facilitate the exchange of information and / or data. In some embodiments, one or more components in the acoustic output system 100 (e.g., the multimedia platform 110, the acoustic output device 130, the user terminal 140, the storage device 150) can send information and / or data via the network 120 to other components in the acoustic output system 100. In some embodiments, the network 120 can be any type of wired or wireless network, or a combination thereof.For illustrative purposes only, the network 120 can include a wired network, a fiber optic network, a telecommunications network, an intranet, the internet, a local area network (LAN), a wide area network (WAN), a wireless local area network (WLAN), a man-in-the-city network (MAN), a public switched telephone network (PSTN), a Bluetooth network, a ZigBee network, a near-field communication (NFC) network, etc., or any combination thereof. In some embodiments, the network 120 can include one or more network access points. For example, the network 120 can include wired or wireless network access points such as base stations and / or internet nodes, with one or more components of the acoustic output system 100 being connected to the network 120 to exchange data and / or information.

[0075] The acoustic output device 130 can output sound to a user and interact with the user. In some embodiments, the acoustic output device 130 can provide the user with at least audio content, such as songs, poems, news broadcasts, weather reports, audio courses, etc. In some embodiments, the user can provide feedback to the acoustic output device 130 via, for example, buttons, screen touch, body movement, speech, gestures, thoughts, etc. In some embodiments, the acoustic output device 130 can be a portable device. Unless otherwise specified, the portable device described herein can include earphones and various other types of personal devices, such as a device worn on the head, shoulder, or body.The wearable device can provide the user with audio content, regardless of whether it is in contact with the user or not. In some embodiments, the wearable device may include smart earbuds, a head-mounted display (HMD), a smart bracelet, smart shoes, a smartwatch, smart clothing, a smart backpack, a smart accessory, a virtual reality helmet, etc., or any combination thereof.

[0076] The acoustic output device 130 can communicate with the user terminal 140 via the network 120. In some embodiments, the acoustic output device 130 can receive various types of data and / or information, including user gestures such as handshakes, head shakes, etc. In some embodiments, this data and / or information can include, but is not limited to, motion parameters (such as geographic location, direction of movement, speed of movement, acceleration, etc.) and speech parameters (such as sound volume, sound content, etc.). Furthermore, in some embodiments, the acoustic output device 130 can transmit the received data and / or information to the multimedia platform 110 or the user terminal 140.Further descriptions regarding the acoustic output device 130 can be found in detailed explanations elsewhere in the present application, for example . Fig. 2 and Fig. 3 etc.

[0077] In some embodiments, the user terminal 140 can be customized, for example, by installing an application on the user terminal 140, wherein the application can be used to communicate data and / or signals with the acoustic output device 130 and / or to implement the processing of data and / or signals. The user terminal 140 can comprise a mobile device 130-1, a tablet computer 130-2, a laptop 130-3, a vehicle-integrated device 130-4, etc., or any combination thereof. In some embodiments, the mobile device 130-1 can comprise smart home devices, intelligent mobile devices, etc., or any combination thereof. In some embodiments, the smart home devices can include intelligent lighting devices, intelligent devices for controlling household appliances, intelligent surveillance devices, smart TVs, intelligent cameras, walkie-talkies, etc.or any combination thereof. In some embodiments, the intelligent mobile devices may include a smartphone, a personal digital assistant (PDA), a gaming device, a navigation device, etc., or any combination thereof. In some embodiments, the vehicle-integrated device 130-4 may include a built-in computer, a built-in television, a built-in tablet, etc. In some embodiments, the user terminal 140 may include a signal transmitter and a signal receiver configured to communicate with a positioning device (not shown in the figure) that positions the user and / or the location of the user terminal 140. In some embodiments, the multimedia platform 110 or the storage device 150 may be integrated into the user terminal 140.In this case, the functions that can be implemented by the aforementioned multimedia platform 110 can be implemented analogously by the user terminal device 140.

[0078] Data and / or instructions can be stored on the storage device 150. In some embodiments, the storage device 150 can store data originating from the multimedia platform 110, the acoustic output device 130, and / or the user terminal 140. In some embodiments, the storage device 150 can store data and / or instructions that enable the multimedia platform 110, the acoustic output device 130, and / or the user terminal 140 to implement various functions. In some embodiments, the storage device 150 can comprise a mass storage device, a removable storage medium, a volatile read / write memory, a read-only memory (ROM), etc., or any combination thereof. Examples of mass storage devices include a magnetic disk, an optical disk, a solid-state drive, etc.Examples of removable storage media include a flash drive, a floppy disk, an optical disc, a memory card, a compressed data carrier, a magnetic tape, etc. Examples of volatile read / write storage include random access memory (RAM). Examples of RAM include dynamic random access memory (DRAM), synchronous dynamic random access memory with double data rate (DDR SDRAM), static random access memory (SRAM), thyristor random access memory (TRAM), and zero-capacitor random access memory (ZRAM), etc. Examples of ROM include a programmable ROM (PROM), erasable programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), a CD-ROM, and a digital multifunction disk ROM, etc. In some embodiments, the storage device 150 may be implemented on a cloud platform.For example, the cloud platform can comprise a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an internal cloud, a multi-layer cloud, etc., or any combination thereof. In some embodiments, one or more components in the acoustic output system 100 can access data and / or commands stored in the storage device 150 via the network 120. In some embodiments, the storage device 150 can be directly connected to the multimedia platform 110 as backend storage.

[0079] In some embodiments, the multimedia platform 110, the network 120, the user terminal 140, and / or the storage device 150 can be integrated into the acoustic output device 130. In particular, with technological advancements and improvements in the processing capabilities of the acoustic output device 130, all processing can be performed by the acoustic output device 130. For example, the acoustic output device 130 could be a smart earphone or an MP3 player, etc., with highly integrated electronic elements such as a central processing unit (CPU) and a graphics processing unit (GPU), etc.

[0080] Fig. Figure 2 shows a schematic view of an acoustic output device according to some embodiments of the present application. As in Fig. As shown in Figure 2, the acoustic output device 200 can comprise an ear hook 210, a housing 220, a circuit housing 230, a back-of-the-headband 240, an acoustic assembly 250, a control circuit 260, and a battery 270. The housing 220 and the circuit housing 230 can be provided at two ends of the ear hook 210, and the back-of-the-headband 240 can be provided at one end of the circuit housing 230, away from the ear hook 210. The housing 220 can be used to accommodate various acoustic assemblies 250. The circuit housing 230 can be used to accommodate the control circuit 260 and the battery 270. The two ends of the back-of-the-headband 240 can each be physically connected to the associated circuit housing 230.The ear hook 210 can refer to a structure that, when the acoustic output device 200 is worn by a user, can fix the housing 220 and the acoustic assembly 250 at a predetermined position on the user's ear.

[0081] In some embodiments, the ear hook 210 can include an elastic support element that can be used to suspend the acoustic output device 200 from the user's ear when the user wears it. The elastic support element can be configured to hold the ear hook 210 in a shape that fits the user's ear, so that the ear hook 210 can produce an adapted elastic deformation according to the shape of the user's ear and head. When the acoustic output device 200 is worn by the user, the elastic support element can adapt to users with different ear and head shapes. In some embodiments, the elastic support element can be made of a memory alloy with good deformation recovery properties.The shape-memory alloy refers to a material composed of two or more metallic elements that exhibits a shape-memory effect through thermoelasticity and martensitic phase transformations and their reversals. In some embodiments, the shape-memory alloy may include, but is not limited to, any one or more nickel-titanium alloys, copper-zinc alloys, iron-manganese alloys, nickel-aluminum alloys, gold-cadmium alloys, etc. In some embodiments, the elastic support element may also be a support element composed of other materials, such as organic polymer materials. In some embodiments, the organic polymer materials may include one or more types of rubber, synthetic fiber, plastic, etc. In some embodiments, the elastic support element may also be made of an alloy other than the shape-memory alloy.In some embodiments, an electrical connection between the acoustic assembly 250 and other components (e.g., the control circuit 260, the battery 270, etc.) can be established by means of conductor wires in the elastic support element to facilitate the power supply and data transmission of the acoustic assembly 250. In some embodiments, the ear hook 210 can further comprise a protective cover 211 and a housing cover 212, which is formed integrally with the protective cover 211, wherein the protective cover 211 encloses the outside of the elastic support element, and the housing cover 212 covers the outside of the housing 220 and is adapted to the housing 220.

[0082] The housing 220 can be configured to accommodate the acoustic assembly 250. In some embodiments, the acoustic assembly 250 can comprise an acoustic bone conduction assembly, an acoustic air conduction assembly, etc. The acoustic bone conduction assembly can be configured to output sound waves (also referred to as bone conduction sound waves) through a solid medium, e.g., bone. For example, the acoustic bone conduction assembly can convert audio signals, e.g., electrical signals, into vibrations and transmit them to the user's bones, e.g., the skull. In some embodiments, the acoustic bone conduction assembly can comprise a magnetic circuit system, one or more vibration plates, and a voice coil.The magnetic circuit system can generate a magnetic field such that the voice coil located in a magnetic gap produces vibrations under the influence of the magnetic field, the vibration of the voice coil driving one or more vibration plates. At least one of the one or more vibration plates can be physically connected to the housing 220, the housing 220 being able to contact the user's skin, e.g., the skin on the user's head, and transmit bone conduction sound waves to the cochlea of ​​the user wearing the acoustic output device 200. The acoustic air conduction assembly can be configured to output sound waves (also referred to as air conduction sound waves) through air.For example, the acoustic air conduction assembly can convert the vibration of the housing 220, the acoustic bone conduction assembly, and / or the vibration of the air within the housing 220 into air vibrations that can be received by the user's ear. In some embodiments, the acoustic air conduction assembly can include at least one diaphragm, which may be physically connected to the acoustic bone conduction assembly and / or the housing 220. When the acoustic bone conduction assembly (e.g., one or more vibrating plates) vibrates to generate bone conduction sound waves, the vibration of the acoustic bone conduction assembly (e.g., the one or more vibrating plates) can drive the housing 220 and / or the diaphragm, which is physically connected to the acoustic bone conduction assembly and / or the housing 220, to vibrate. The vibration of the diaphragm can cause a vibration of the air within the housing 220.The air vibration in housing 220 can be transmitted from housing 220 to generate air conduction sound waves. Further descriptions regarding the acoustic bone conduction assembly and the acoustic air conduction assembly can be found in detailed explanations elsewhere in this application, e.g. Fig. 3 and Fig. 4.

[0083] In some embodiments, the number of acoustic assemblies 250 and housings 220 can be two, each corresponding to the user's left and right ear and their surrounding areas. In some embodiments, one acoustic assembly 250 and one housing 220 can also be provided, which, when the acoustic output device 200 is worn by the user, can be distributed around the user's left or right ear and its surrounding area. Details of the acoustic assembly 250 can be found elsewhere in this application, e.g. Fig. 3, Fig. 4, Fig. 5 to Fig. 6 and their associated description. It must be stated that the acoustic output device 200 can also be worn in other ways. For example, the ear hook 210 covers or encloses the user's ear, while the back-of-the-head band 240 extends over the user's head. As another example, the acoustic output device 200 may not include a back-of-the-head band 240, with the ear hook 210 hanging directly from the concha of the user's ear, so that the acoustic output device 200 is located at or near the user's ear.

[0084] In some embodiments, the housing 220 may be provided with a contact surface 221. The contact surface 221 may come into contact with the user's skin. In some embodiments, the contact surface 221 may also be referred to as the upper surface or skin contact area of ​​the housing 220. A surface of the housing 220 opposite the upper surface may also be referred to as the rear surface or back surface of the housing 220. Bone conduction sound waves generated in the acoustic output device 130 by one or more acoustic bone conduction assemblies of the acoustic assembly 250 may be transmitted to the outside through the contact surface 221 of the housing 220. In some embodiments, the material and thickness of the contact surface 221 may affect the transmission of the bone conduction sound waves to the user and thus influence the sound quality.For example, if the material of the contact surface 221 is relatively flexible, the transmission of bone conduction sound waves in the low frequency range may be better than the transmission of bone conduction sound waves in the high frequency range. Conversely, the transmission of bone conduction sound waves in the high frequency range may be better than the transmission of bone conduction sound waves in the low frequency range if the material of the contact surface 221 is relatively hard.

[0085] Fig. Figure 3 shows a frame diagram of an acoustic output device according to some embodiments of the present application. As in Fig. As shown in Figure 3, the acoustic output device 300 can comprise an acoustic bone conduction assembly 310, an acoustic air conduction assembly 320, and a housing 330 for receiving at least some of the elements of the acoustic bone conduction assembly 310 and the acoustic air conduction assembly 320.

[0086] The acoustic bone conduction assembly 310 can be used to generate bone conduction sound waves. In some embodiments, the acoustic bone conduction assembly 310 can generate bone conduction sound waves in a specific frequency range (e.g., a low frequency range, a mid-frequency range, a high frequency range, a low-to-mid-frequency range, a mid-to-high frequency range, etc.) depending on a control signal generated by a signal processing module. In some embodiments, the bone conduction sound waves can refer to sound waves that are transmitted through a solid medium (e.g., bone) in the form of mechanical vibrations.In some embodiments, the low frequency range (also referred to as low frequencies) may refer to a frequency range from 20 Hz to 150 Hz, wherein the medium frequency range (also referred to as medium frequencies) may refer to a frequency range from 150 Hz to 5 kHz, wherein the high frequency range (also referred to as high frequencies) may refer to a frequency range from 5 kHz to 20 kHz, wherein the low to medium frequency range (also referred to as low to medium frequencies) may refer to a frequency range from 150 Hz to 500 Hz, and wherein the medium to high frequency range (also referred to as medium to high frequencies) may refer to a frequency range from 500 Hz to 5 kHz.As another example, the low frequency range could refer to a frequency range of 20 Hz to 300 Hz, the medium frequency range to a frequency range of 300 Hz to 3 kHz, the high frequency range to a frequency range of 3 kHz to 20 kHz, the low to medium frequency range to a frequency range of 100 Hz to 1000 Hz, and the medium to high frequency range to a frequency range of 1000 Hz to 10 kHz. It should be noted that the values ​​of the frequency ranges are for illustrative purposes only and are not limiting. The definitions of the frequency ranges described above may vary depending on different application scenarios and classification standards.For example, in some other application scenarios, the low frequency range may be 20 Hz to 80 Hz, the mid frequency range 160 Hz to 1280 Hz, the high frequency range 2560 Hz to 20 kHz, the low to mid frequency range 80 Hz to 160 Hz, and the mid to high frequency range 1280 Hz to 2560 Hz. Optionally, different frequency ranges may or may not have overlapping frequencies. Further explanations regarding the acoustic bone conduction assembly 310 can be found elsewhere in this description, e.g., [reference to relevant section]. Fig. 4, Fig. 17, Fig. 18A, Fig. 18B and its accompanying explanations.

[0087] The acoustic air conduction assembly 320 can be used to generate air conduction sound waves. In some embodiments, the acoustic air conduction assembly 320 can generate air conduction sound waves based on the vibration of the acoustic bone conduction assembly 310, the vibration of the housing 330 that contains the acoustic bone conduction assembly 310 and the acoustic air conduction assembly 320, the vibration of the air in the housing 330, and / or a control signal. In some embodiments, the acoustic air conduction assembly 320 can generate air conduction sound waves in a frequency range that is identical to or different from the frequency range in which the vibration of the acoustic bone conduction assembly 310 lies.In some embodiments, the acoustic air conduction assembly 320 may comprise at least one diaphragm, wherein the at least one diaphragm may be connected to the acoustic bone conduction assembly 310 or the housing 330, and wherein air conduction sound waves can be generated based on the vibration of the at least one diaphragm or the housing 330. In some embodiments, the air conduction sound waves may refer to sound waves that are conducted by air vibration. Further explanations regarding the acoustic air conduction assembly 320 can be found elsewhere in this description, e.g. Fig. 4, Fig. 20A and its accompanying explanations.

[0088] The housing 330 can be used to accommodate at least part of the acoustic bone conduction assembly 310 and the acoustic air conduction assembly 320. In some embodiments, the housing 330 can comprise a first chamber and a second chamber separated by a membrane in the acoustic air conduction assembly 320. In some embodiments, the housing 330 can comprise a first section and a second section. The first chamber can be formed by the first section of the housing 330 and the membrane. The acoustic bone conduction assembly 310 can be arranged in the first chamber. The first section of the housing 330 (e.g., one or more vibrating plates) surrounding the first chamber can be physically connected to the acoustic bone conduction assembly 310.When the user wears the acoustic output device 300, the first section of the housing 330 can transmit the vibration of the acoustic bone conduction assembly 310 to the user's bones. The second section of the housing 330 and the diaphragm can form the second chamber. The air conduction sound waves generated by the acoustic air conduction assembly 320 can be transmitted from the second chamber to the environment surrounding the acoustic output device 300. In some embodiments, the first and second chambers cannot communicate with each other. In other embodiments, the first and second chambers can communicate with each other. For example, one or more openings can be provided in the diaphragm.In some embodiments, the first chamber can be used to house at least part of the acoustic bone conduction assembly 310, wherein the housing 330 is provided with one or more sound outlet openings that communicate with the second chamber, allowing air conduction sound waves to be transmitted through the sound outlet opening to the surroundings of the acoustic output device 300. In some embodiments, when the acoustic output device 300 is worn by the user, the sound outlet opening can be oriented towards the outer ear canal of the user's ear, so that the air conduction sound waves can be transmitted to the user's cochlea via the sound outlet opening.

[0089] In some embodiments, the acoustic output device 300 may further include a signal processing module. The acoustic bone conduction assembly 310 may be electrically connected to the signal processing module to receive a control signal, e.g., an audio signal, and to generate bone conduction sound waves based on the control signal. For example, the acoustic bone conduction assembly 310 may include any element (such as a vibration motor, an electromagnetic vibration device, etc.) that converts an electrical signal into a mechanical vibration signal. Exemplary signal conversion methods include, but are not limited to, electromagnetic signal conversion (e.g., moving-coil signal conversion, moving-iron signal conversion, magnetostrictive signal conversion), piezoelectric signal conversion, electrostatic signal conversion, etc.The internal structure of the acoustic bone conduction assembly 310 can be a single resonant system or a composite resonant system. In some embodiments, the acoustic bone conduction assembly 310 can generate mechanical vibrations in response to bone conduction control signals, thereby generating bone conduction sound waves.

[0090] Fig. Figure 4 shows a schematic view of an acoustic output device according to some embodiments of the present application. As in Fig. As shown in Figure 4, the acoustic output device 400 can comprise an acoustic bone conduction assembly 410, a housing 420, and an acoustic air conduction assembly. The acoustic bone conduction assembly 410 and the acoustic air conduction assembly can be located inside the housing 420. The acoustic bone conduction assembly 410 can generate bone conduction sound waves that are transmitted through the housing 420 to a user. The acoustic air conduction assembly can generate air conduction sound waves based on the vibration of the acoustic bone conduction assembly 410. The air conduction sound waves can be transmitted to the user through one or more sound outlet openings (also called sound conduction openings) on the housing 420.

[0091] In some embodiments, the acoustic bone conduction assembly 410 may comprise a magnetic circuit system 411, one or more vibrating plates 412, and a voice coil 413. The magnetic circuit system 411 may comprise one or more magnetic and / or magnetically conductive elements configured to generate a magnetic field. In some embodiments, the magnetic circuit system 411 may include a magnetic gap, wherein the magnetic circuit system 411 can generate a magnetic field within the magnetic gap, and the voice coil 413 may be located within the magnetic gap. At least one of the one or more vibrating plates 412 may be physically connected to the housing 420, wherein the housing 420 may contact the user's skin, e.g., the skin on the user's head, and transmit the bone conduction sound waves to the cochlea of ​​the user wearing the acoustic output device 400.In some embodiments, one of the vibrating plates 412 may also be referred to as the upper wall of the housing 420. When the acoustic output device is worn by the user, as described herein, a wall of the housing closest to the skin refers to an upper wall or front wall (also referred to as the area that touches the user's skin or contact surface, etc.); a wall of the housing furthest from the skin (e.g., the wall opposite the upper wall) is referred to as the lower wall or rear wall; a chamber in the housing corresponding to the upper wall of the housing may be referred to as the front chamber (e.g., first chamber), which is close to an area of ​​skin where the user touches the housing; a chamber corresponding to the lower wall may be referred to as the rear chamber (e.g., second chamber), which is far from the area of ​​skin where the user touches the housing.The voice coil 413 can be mechanically connected to one or more vibration plates 412. In some embodiments, the voice coil 413 can also be electrically connected to a signal processing module. When a current, which can represent a control signal, is introduced into the voice coil 413, the voice coil 413 can vibrate in the magnetic field and drive one or more vibration plates 412 to vibrate. The vibration of the one or more vibration plates 412 can be transmitted through the housing 420 to the user's bones to generate bone conduction sound waves. In some embodiments, the vibration of the one or more vibration plates 412 can cause vibration of the housing 420 and / or the magnetic circuit system 411. The vibration of the housing 420 and / or the magnetic circuit system 411 can cause vibration of the air within the housing 420.

[0092] The acoustic air conduction assembly may include a diaphragm 431. The diaphragm 431 may be physically connected to the acoustic bone conduction assembly 410 and / or the housing 420. For example, the diaphragm 431 may be connected to at least one component of the magnetic circuit system 411, the voice coil 413, and / or the one or more vibrating plates 412. When the acoustic bone conduction assembly 410 (e.g., the one or more vibrating plates 412) vibrates to generate bone conduction sound waves, the vibration of the acoustic bone conduction assembly 410 (e.g., the one or more vibrating plates 412) may drive the housing 420 and / or the diaphragm 431, which is physically connected to the acoustic bone conduction assembly 410 and / or the housing 420, to vibrate. The vibration of the diaphragm 431 may cause the air in the housing 420 to vibrate.The air vibration in the housing 420 can be transmitted from the housing 420 to generate air conduction sound waves. The air conduction sound waves and the bone conduction sound waves can represent the same audio signal as an audio signal input into the acoustic bone conduction assembly 410, or the same audio signal as an audio signal received from the user. In this description, the expression "that the air conduction sound waves and the bone conduction sound waves represent the same audio signal" means that the air conduction sound waves and the bone conduction sound waves represent the same speech content, which can be represented by frequency components of the air conduction sound waves and the bone conduction sound waves. In some embodiments, the frequency components in the air conduction sound waves and the bone conduction sound waves can be different.For example, bone conduction sound waves may contain more low-frequency components, while air conduction sound waves may contain more high-frequency components. In some embodiments, the diaphragm 431 may be physically connected to the magnetic circuit system 411, with the diaphragm 431 and the magnetic circuit system 411 being considered stationary, and the vibration of the diaphragm 431 relative to the housing 420 may cause pressure changes in the first chamber 423 and the second chamber 424, thereby generating air vibrations in the first chamber 423 and the second chamber 424.In some embodiments, the diaphragm 431 can be physically connected to the magnetic circuit system 411, with the housing 420 being considered stationary, wherein the vibration of the diaphragm 431 and the magnetic circuit system 411 relative to the housing 420 can cause pressure changes in the first chamber 423 and the second chamber 424, thereby causing air vibrations in the first chamber 423 and the second chamber 424.

[0093] In some embodiments, the diaphragm 431 can comprise a main part and an auxiliary part. The main part can be physically connected to a lower surface of the magnetic circuit system 411, which is located away from the upper wall of the housing 420. In some embodiments, the main part of the diaphragm 431 can comprise a plate, such as a round plate or an annular plate, which can cover at least a portion of the lower surface of the magnetic circuit system 411. In some embodiments, the main part of the diaphragm 431 can comprise a plate, such as a round plate or an annular plate, which can cover at least a portion of the lower surface of the magnetic circuit system 411 and a side wall connected to the side wall of the magnetic circuit system 411. In some embodiments, the auxiliary part of the diaphragm 431 can be an annular shape that surrounds the main part of the diaphragm 431.The auxiliary part of the diaphragm 431 can be physically connected to the housing 420. For example, an inner surface of the auxiliary part of the diaphragm 431 can be in contact with or connected to an outer surface of the main part of the diaphragm 431, wherein an outer surface of the auxiliary part of the diaphragm 431 can be physically connected to the housing 420. In some embodiments, the auxiliary part of the diaphragm 431 can comprise at least one raised or recessed area. In some embodiments, the diaphragm 431 can be a thin film made of a vibration-sensitive material.In some embodiments, the membrane material 431 may comprise one of polycarbonate (PC), polyamides (PA), acrylonitrile butadiene styrene copolymer (ABS), polystyrene (PS), high-impact polystyrene (HIPS), polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyurethanes (PU), polyethylene (PE), phenol formaldehyde (PF), urea formaldehyde resin (UF), melamine formaldehyde resin (MF), polyarylate (PAR), polyetherimide (PEI), polyimide (PI), polyethylene naphthalate (PEN), polyetheretherketone (PEEK), silica gel, etc., or a combination thereof.

[0094] In some embodiments, the acoustic output device 400 can generate bone conduction sound waves under the influence of the acoustic bone conduction assembly 410, wherein the bone conduction sound waves may have a frequency response curve that may include at least one resonance peak. Bone conduction sound waves generated in the contact area of ​​the acoustic output device 400 with the user's skin, in the case where the membrane 413 is connected to the acoustic bone conduction assembly 410 and the housing 420, have a first frequency response curve (as shown in Fig. 5 represented by “k1+k2”). Bone conduction sound waves generated in the contact area of ​​the acoustic output device 400 with the user’s skin, in the case where the diaphragm 413 is separated either from the acoustic bone conduction assembly 410 or from the housing 420, exhibit a second frequency response curve (as in Fig. 5 represented by “k1”). In some embodiments, the peak resonance frequencies of the resonance peaks corresponding to the first frequency response curve and the second frequency response curve can satisfy the following relationship (1): |f1−f2| / f1≤50%

[0095] Here, f1 represents a peak resonance frequency of a bone conduction sound wave peak generated when the diaphragm 413 is connected to the acoustic bone conduction assembly 410 and the housing 420, and f2 represents a peak resonance frequency of a bone conduction sound wave peak generated when the diaphragm 413 is separated from either the acoustic bone conduction assembly 410 or the housing 420. It should be noted that the value of |f1-f2| / f1, i.e., the relationship between the peak resonance frequency f1 and the peak resonance frequency f2, in the above relationship (1) may also be less than or equal to another value, such as 60%, 40%, 30%, 20%, etc.In some embodiments, the difference between a peak resonance intensity corresponding to the peak resonance frequency f1 and a peak resonance intensity corresponding to the peak resonance frequency f2 can be less than or equal to 5 dB. In some embodiments, the difference between the peak resonance intensity corresponding to the peak resonance frequency f1 and the peak resonance intensity corresponding to the peak resonance frequency f2 can also be less than or equal to another value, such as 3 dB, 4 dB, 6 dB, etc. This can also be understood to mean that |f1-f2| / f1 can be used to measure the magnitude of the influence of the membrane 413 on the acoustic bone conduction assembly 410 generating vibrations in the user's skin contact area.The smaller the ratio |f1-f2| / f1, the less influence the membrane 413 has on the vibrations received by the user's skin contact area through the acoustic bone conduction assembly 410; this can also be understood as meaning that the provision of the membrane 413 in the acoustic output device 400 essentially does not result in a strong sensation of vibration, thus ensuring that the user has a good experience when wearing the acoustic output device 400.Therefore, by introducing the membrane 413 on the base, and influencing the original resonance system of the acoustic output device 400 as little as possible, it is possible for the acoustic output device 400 to synchronously output bone conduction sound waves and air conduction sound waves with the same or similar phase, thereby improving the acoustic expressiveness of the acoustic output device 400 and making it more energy-efficient. As an example, the displacement magnitude in the low-frequency band or in the low- to mid-frequency band (e.g., f1 ≤ 500 Hz) in the frequency response curve can satisfy a specific condition so that the low frequency and the low- to mid-frequency range of the bone conduction sound waves are affected as little as possible.In some embodiments, the displacement in the low-frequency band or the low- to mid-frequency band (e.g., f1 ≤ 500 Hz) in the frequency response curve can be less than or equal to 50 Hz, i.e., |f1 - f2| ≤ 50 Hz, so that the membrane 413 has as little influence as possible on the acoustic bone conduction assembly 410 generating vibrations in the user's skin contact area. In some embodiments, the displacement in the low-frequency band or the low- to mid-frequency band (e.g., f1 ≤ 500 Hz) in the frequency response curve can be greater than or equal to 5 Hz, i.e., |f1 - f2| ≥ 5 Hz, so that the membrane 413 has a certain degree of structural strength and elasticity to reduce fatigue deformation of the membrane 413 during use and thus extend its service life.It should be noted that in some embodiments, the skin contact area may comprise at least part of a housing area where, when the acoustic output device 400 is worn by the user, the housing 420 touches the user's skin. For example, Figure 420 shows... Fig. 5 A schematic comparison diagram of frequency response curves of an acoustic output device before and after the provision of a diaphragm according to some embodiments of the present application. As in Fig. As shown in Figure 5, the horizontal axis can represent the frequency in Hz and the vertical axis the intensity in dB. The first frequency response curve mentioned above, 510 (as shown in Figure 5), is shown in Figure 5. Fig. 5 represented by “k1+k2”) has a resonance peak (point “A” in Fig. 5) in the low frequency band or in the low to mid-frequency band (e.g., 10 Hz to 500 Hz), where the peak resonance frequency f1 of the resonance peak is approximately 112 Hz and the peak resonance intensity is approximately 88 dB. The second frequency response curve 520 (as in Fig. 5 represented by “k1”) has a resonance peak (point “B” in Fig. 5) in the low frequency band or in the low to mid-frequency band (e.g., 10 Hz to 500 Hz), where the peak resonance frequency f2 of the resonance peak is approximately 95 Hz and the peak resonance intensity is approximately 87 dB. It can be seen that the difference (or absolute value) between the peak resonance frequency f1 and the peak resonance frequency f2 is approximately 17 Hz, i.e., that the shift magnitude in the low frequency band or in the low to mid-frequency band (e.g., f1 ≤ 500 Hz) in the frequency response curve is approximately 17 Hz. The difference between the peak resonance intensity corresponding to the peak resonance frequency f1 and the peak resonance intensity corresponding to the peak resonance frequency f2 is approximately 1 dB.In some embodiments, within an elastic region of the diaphragm, the following applies: the greater the elasticity of the diaphragm, the greater the displacement in the low-frequency band or the low- to mid-frequency band of the frequency response curve; the magnitude of the displacement in a particular frequency band (e.g., the low-frequency band or the low- to mid-frequency band) of the frequency response curve can be adjusted by modifying the elasticity of the diaphragm. For example, the elasticity of the diaphragm is reduced (by using a material with a lower modulus of elasticity) to decrease the displacement in the low-frequency band or the low- to mid-frequency band of the frequency response curve. With further reference to... Fig. 4. In some embodiments, the housing 420 can comprise a first section and a second section. The first chamber 423 can be formed by the first section of the housing 420 and the membrane 431. The first section surrounding the first chamber 423 can be physically connected to the acoustic bone conduction assembly 410 (e.g., one or more vibrating plates 412). When the user wears the acoustic output device 400, the first section of the housing 420, or one or more vibrating plates 412 provided on the first section of the housing 420, can transmit the vibration of the acoustic bone conduction assembly 410 to the user's bones. The second chamber 424 can be formed by the second section of the housing 420 and the membrane 431.The air conduction sound waves generated by the acoustic air duct assembly can be transmitted from the second chamber 424 to the environment of the acoustic output device 400.

[0096] In some embodiments, the housing 420 can include at least one sound outlet opening 421, wherein the sound outlet opening 421 is used to transmit air-conducted sound waves in the second chamber 424 to the surroundings of the acoustic output device 400. In some embodiments, the at least one sound outlet opening 421 can be provided on a side wall of the second section of the housing 420, wherein the sound outlet opening 421 can communicate with the second chamber 424. In some embodiments, one or more sound outlet openings 421 can be provided. Due to the interaction between the magnetic field and the voice coil 413, the magnetic circuit system 411 can also receive a corresponding counterforce to vibrate and drive the diaphragm 431 to vibrate. The vibration of the diaphragm 431 can cause the air in the second chamber 424 to vibrate.The air vibration in the second chamber 424 can generate air conduction sound waves in the second chamber 424, whereby the air conduction sound waves can propagate from the second chamber 424 through the sound outlet opening 421 in the vicinity of the acoustic output device 400.

[0097] In some embodiments, the first chamber 423 in the housing 420 is enlarged, the second chamber 424 is reduced in size, and the pressure in the second chamber 424 is increased when the interaction between the voice coil 413 and the magnetic circuit system 411 (i.e., the vibration of the voice coil 413 in the magnetic field provided by the magnetic circuit system 411) causes the housing 420 to move towards a front of the acoustic output device 400 (i.e., in a direction indicated by an arrow A or towards the user's skin) and the diaphragm 431 (it can be assumed that the housing 420 moves in the direction indicated by the arrow A, and that the magnetic circuit system 411 and the diaphragm 431 remain stationary).As the housing 420 moves toward the user's skin, the pressure exerted on the user's skin by one or more vibration plates 412 can increase, whereby the bone conduction sound waves generated by the acoustic bone conduction assembly 410 can be defined as being in "positive phase." Similarly, the air conduction sound waves generated by the acoustic air conduction assembly can also be in "positive phase" because the pressure in the second chamber 424 increases. In some embodiments, the air conduction sound waves and the bone conduction sound waves can be in the same phase, i.e., the phase difference between the air conduction sound waves and the bone conduction sound waves can be zero. In some embodiments, the phase difference between the air conduction sound waves and the bone conduction sound waves can be less than a threshold value, e.g., π, 2π / 3, 1π / 2, etc.As used in this description, the phase difference between air conduction and bone conduction sound waves can refer to the absolute value of the difference between air conduction and bone conduction sound waves. In some embodiments, the difference frequency range between air conduction and bone conduction sound waves can correspond to different phase differences and different thresholds. For example, in a frequency range of less than 300 Hz, the phase difference between air conduction and bone conduction sound waves can be less than π. As another example, in a certain frequency range of less than 1000 Hz (e.g., 300 Hz to 1000 Hz), the phase difference between air conduction and bone conduction sound waves can be less than 2π / 3. As yet another example, in a certain frequency range of less than 3000 Hz (e.g.,Between 1000 Hz and 3000 Hz, the phase difference between air conduction and bone conduction sound waves is less than 1π / 2. Therefore, the synchronicity between bone conduction and air conduction sound waves can be increased, allowing them to be superimposed and thus improving the hearing effect.

[0098] In some embodiments, the actual area of ​​an outlet end of the sound outlet opening 421 can be greater than or equal to 8 mm². 2 This is so that the user can hear more air-conducted sound waves emitted through the sound outlet opening 421. In further embodiments, the actual area of ​​the outlet end of the sound outlet opening 421 can also be greater than or equal to another value, e.g., 10 mm². 2 , 9 mm 2 , 7 mm 2 , 6 mm 2etc. In some embodiments, the actual area of ​​an inlet end of the sound outlet opening 421 may also be greater than or equal to the actual area of ​​its outlet end. In some embodiments, a damping structure (also referred to as a sound-absorbing mesh), e.g., a tuning mesh, etc., may be provided at the sound outlet opening 421 to improve the acoustic effect of the acoustic air duct assembly. In some embodiments, the output characteristics of the air duct sound waves can be adjusted by changing the number, position, size, and / or shape of the sound outlet openings 421.It should be noted that the actual area of ​​the outlet end in the embodiments described herein can be defined as the surface area of ​​an end face where the outlet end is located, and that the actual area of ​​the inlet end in the embodiments described herein can be defined as the surface area of ​​an end face where the inlet end is located. The surface area of ​​the end face where the outlet end is located can be understood here as the surface area of ​​an end face of the outlet end through which vibrations can penetrate via air. The surface area of ​​the end face where the inlet end is located can be understood here as the surface area of ​​an end face of the inlet end through which vibrations can penetrate via air.

[0099] In some embodiments, the output characteristics of bone conduction sound waves can be adjusted by changing the stiffness (e.g., structural dimensions, modulus of elasticity of the material, etc.) of the vibration plate 412 and / or the housing 420. In some embodiments, the output characteristics of air conduction sound waves can be adjusted by changing the shape, modulus of elasticity, and damping of the diaphragm 431.

[0100] With continued reference to Fig. 4. In some embodiments, the housing 420 can be provided with at least one pressure relief opening 422, which communicates with the first chamber 423. For example, the pressure relief opening 422 can be provided on a side wall of a first housing of the housing 420. The first chamber 423 can communicate with the environment of the acoustic output device 400 through the pressure relief opening 422. In some embodiments, the pressure relief opening 422 and the sound outlet opening 421 can be provided on different side walls of the housing 420. In some embodiments, the pressure relief opening 422 and the sound outlet opening 421 can be provided on non-adjacent, e.g., substantially parallel, side walls of the housing 420.In some embodiments, the pressure relief opening 422 may be a through-hole, facilitating pressure equalization between the first chamber 423 of the housing 420 and the environment of the acoustic output device 400. In some embodiments, the vibration of the magnetic circuit system 411 relative to the housing 420 may increase or decrease the pressure in the first chamber 423. The pressure relief opening 422 can regulate the pressure in the first chamber 423 by facilitating communication between the first chamber 423 and the environment, thereby maintaining the mutual movement between the housing 420 and the magnetic circuit system 411 (and / or the diaphragm 431) and ensuring normal vibration of the housing 420. In some embodiments, the pressure relief opening 422 may also help to control the frequency response (e.g.,to adjust the frequency response (in the low frequency band) of the acoustic air conduit assembly to further reduce sound loss. It is understood that the vibration of the magnetic circuit system 411 relative to the housing 420 can cause air vibrations in the first chamber 423. Air conduit sound waves generated by the air vibrations in the first chamber 423 can be transmitted through the pressure relief port 422 to the surroundings of the acoustic output device 400, resulting in sound loss. In some embodiments, the frequency response of the acoustic air conduit assembly can be adjusted by designing parameters such as the size, structure, acoustic resistance, shape, etc., of the pressure relief port 422 to reduce or suppress sound loss.In some embodiments, a sound-absorbing mesh (not shown) can be provided at the pressure relief opening 422 to reduce the intensity of the resonance peak described above and thereby reduce the frequency response at a structure formed by the first chamber 423 as well as at a structure formed by the pressure relief opening 422, thus achieving a further reduction in sound loss. In some embodiments, one or more pressure relief openings 422 can be provided, the position of the pressure relief opening 422 also being provided at any position of a side wall corresponding to the first chamber 423, which is not limited here.

[0101] In some embodiments, multiple pressure relief openings may be provided. For illustrative purposes only, the at least one pressure relief opening may comprise a first pressure relief opening and a second pressure relief opening, the first being located further from the sound outlet opening 421 than the second, and the effective area of ​​an outlet end of the first pressure relief opening being larger than the effective area of ​​an outlet end of the second pressure relief opening. The effective area described herein, and the effective area of ​​a particular duct (e.g., a sound conducting duct, etc.) or opening (e.g., a sound outlet opening, a sound regulating opening, a communication opening, etc.) introduced below, may be defined as the product of its actual area and the porosity of the covering sound-absorbing mesh.The area through which air can flow via the opening. For example, if the outlet end of the pressure relief vent is covered with a sound-absorbing mesh, the effective area of ​​the outlet end is the product of the actual area of ​​the outlet end of the pressure relief vent and the porosity of the covered sound-absorbing mesh. As another example, the effective area of ​​the outlet end of the pressure relief vent is the actual area of ​​the outlet end of the pressure relief vent when the outlet end of the pressure relief vent is not covered with a sound-absorbing mesh. Similarly, the effective areas of the outlet ends of passageways such as sound-conducting ducts, sound-regulating vents, etc., which will be mentioned later, can also each be defined as the product of an actual area and a corresponding porosity, which will not be repeated here.

[0102] In some embodiments, the sound outlet opening 421 and the first pressure relief opening can each be located on two opposite sides of the acoustic bone conduction assembly 410. In some embodiments, the housing 420 of the acoustic output device 400 can comprise a first side wall and a second side wall located on two opposite sides of the acoustic bone conduction assembly 410, as well as a third side wall and a fourth side wall connecting and spaced apart from the first and second side walls, wherein the sound outlet opening 421 or the first pressure relief opening can be provided in the first side wall or the second side wall, respectively, and wherein the second pressure relief opening can be provided in the third or fourth side wall.In some embodiments, the at least one pressure relief opening may further comprise a third pressure relief opening, wherein the effective area of ​​the outlet end of the second pressure relief opening is larger than the effective area of ​​the outlet end of the third pressure relief opening, and wherein the second pressure relief opening and the third pressure relief opening are provided in the third side wall and the fourth side wall, respectively. In some embodiments, the actual area of ​​the outlet end of the first pressure relief opening is larger than the actual area of ​​the outlet end of the second pressure relief opening, and the actual area of ​​the outlet end of the second pressure relief opening is larger than the actual area of ​​the outlet end of the third pressure relief opening.

[0103] In some embodiments, the membrane 431 may not be connected to the acoustic bone conduction assembly 410, wherein a peripheral side of the membrane 431 is directly physically connected to the inner wall of the housing 420, thereby dividing the chamber inside the housing 420 into a first chamber 423 and a second chamber 424. In some embodiments, several membranes 431, for example two or three, may be provided, wherein the several membranes may be physically connected to the magnetic circuit system 411 of the acoustic bone conduction assembly 410 and divide the chamber inside the housing 420 into a first chamber 423 and a second chamber 424. Regarding a case in which the number of membranes 431 is two, it can be stated that Fig. 20B and Fig. Reference is made to 20C, which is not repeated here.

[0104] Fig. Figure 6 shows a schematic view of an acoustic output device according to some further embodiments of the present application. The acoustic output device 600 can be identical or similar to the acoustic output device 400 in Fig. 4. For example, the acoustic output device 600 may comprise an acoustic bone conduction assembly 610, a housing 620, and an acoustic air conduction assembly. As another example, the acoustic bone conduction assembly 610 may comprise a magnetic circuit system 611, one or more vibrating plates 612, and a voice coil 613. The air conduction assembly may comprise a diaphragm 631. In some embodiments, the sound outlet opening 621 may be provided on the housing 620 and communicate with the second chamber 624, wherein the 622 may be provided on the housing 620 and communicate with the first chamber 623. Further explanations regarding the components in the acoustic output device 600 can be found elsewhere in the present application, e.g. Fig. 4 and their accompanying explanations.

[0105] As in Fig. As shown in Figure 6, the acoustic output device 600, in contrast to the acoustic output device 400, can further comprise a sound-guiding element 640, which is connected to the housing 620. The sound-guiding element 640 is provided with a sound-conducting channel, which can be coupled to and communicate with the sound outlet opening 621. In some embodiments, the sound-conducting channel can be used to direct airborne sound waves to the vicinity of the acoustic output device 600. In some embodiments, the sound-guiding element 640 can also be used to change the propagation path and / or the direction of the airborne sound waves described above, thereby changing the directivity of the airborne sound waves.In some embodiments, the sound-guiding element 640 can further reduce the distance between the sound outlet opening 621 and a human ear, thereby increasing the intensity of the air-conducted sound waves. When the user wears the acoustic output device 600, an end portion of the sound-conducting channel of the sound-guiding element 640, located away from the sound outlet opening 621, can be oriented towards the user's ear. Furthermore, the sound-guiding element 640 can also cause the actual position at which the air-conducted sound waves are emitted from the acoustic output device 600 to be located further from the lower wall of the housing 620 (i.e., the rear end face of the housing 620 opposite the skin contact area, e.g.,The end face of the housing 620 corresponding to the second chamber 624 is removed to reduce out-of-phase cancellation of the sound at the sound outlet opening 621 due to possible sound loss at the lower wall. In this way, the user can hear the air-conducted sound waves better when wearing the acoustic output device 600.

[0106] In some embodiments, to ensure sound quality, the frequency response curve of the acoustic output device 600 should be relatively flat over a wider frequency band. That is, the resonance peak should ideally be located at a higher frequency. The frequency response curve of the air-conducted sound waves emitted to the surroundings of the acoustic output device 600 via the sound outlet opening 621 exhibits a resonance peak whose peak resonance frequency can be greater than or equal to 1 kHz. Preferably, the peak resonance frequency can be greater than or equal to 2 kHz, so that the acoustic output device 600 has a better speech output effect. More preferably, the peak resonance frequency can be greater than or equal to 3.5 kHz, so that the acoustic output device 600 has a better music output effect.Even more preferably, the peak resonance frequency can be greater than or equal to 4.5 kHz.

[0107] To increase the peak resonance frequency of the acoustic output device 600, in some embodiments the sound conduction channel communicates with the second chamber 624 via the sound outlet opening 621, thereby forming a Helmholtz resonator structure. The resonance frequency f of the Helmholtz resonator structure and the structural parameters of the second chamber 624 and the sound conduction channel can satisfy the following relationship (2): f∝[S / (VL+1,7 VR)]1 / 2

[0108] Here, V represents the volume of the second chamber 624, S the cross-sectional area of ​​the sound conduction duct, R the equivalent radius of the sound conduction duct, and L the length of the sound conduction duct. The equivalent radius refers to the radius of a circle with the same area as a sound conduction duct, whether the shape of this sound conduction duct is approximately circular or non-circular. Equation (2) shows that, with a constant volume of the second chamber 624, increasing the cross-sectional area of ​​the sound conduction duct and / or decreasing its length can increase the resonance frequency, thus allowing the air-conducted sound waves to propagate towards higher frequencies.

[0109] In some embodiments, the length of the sound conduction channel can be less than or equal to 7 mm. In some embodiments, the length of the sound conduction channel can be less than or equal to 6 mm. Preferably, the length of the sound conduction channel can be between 2 mm and 5 mm.

[0110] In some embodiments, in one vibration direction of the acoustic bone conduction assembly 610, the distance between the exit end of the sound conduction channel and the inner wall of the housing 620 facing away from the skin contact area (i.e., an inner surface of the upper wall) can be greater than or equal to 3 mm, thereby preventing out-of-phase cancellation of the air conduction sound waves at the exit end of the sound conduction channel due to sound loss caused by the lower wall of the housing 620 (i.e., the end face of the housing 620 corresponding to the second chamber 624).

[0111] In some embodiments, the cross-sectional area of ​​the sound conduction channel can be greater than or equal to 4.8 mm². 2 Preferably, the cross-sectional area of ​​the sound conduction channel can be greater than or equal to 8 mm². 2 In some embodiments, the cross-sectional area of ​​the sound conduction duct can gradually increase in one direction of extension (i.e., a direction of transmission of the air-conducted sound waves, i.e., in a direction away from the sound outlet opening 621), so that the sound conduction duct can be shaped like a trumpet to facilitate the conduction of the air-conducted sound waves. In some embodiments, the cross-sectional area of ​​the inlet end of the sound conduction duct can be greater than or equal to 10 mm². 2 In some embodiments, the cross-sectional area of ​​the exit end of the sound conduction channel can be greater than or equal to 15 mm². 2In some embodiments, the length of the sound conduction channel can be 2.5 mm, with the cross-sectional areas of the inlet and outlet ends of the sound conduction channel being 15 mm². 2 or 25.3 mm 2 The volume of the sound conduction channel can vary. In some embodiments, the ratio of the volume of the sound conduction channel to the volume of the second chamber 624 can be between 0.05 and 0.9. The volume of the second chamber 624 can be less than or equal to 400 mm³. 3 Preferably, the volume of the second chamber 624 can be between 200 mm³. 3 and 400 mm 3 Furthermore, it is planned that the volume of the second chamber will be 624,350 mm³. 3 This may amount to... For a detailed explanation of the sound-guiding component, please refer to... Fig. 7A-7E are referred to.

[0112] Fig. Figure 7A shows an exemplary structural view of a sound-guiding component according to some embodiments of the present application. Fig. Figure 7B shows an exemplary structural view of a sound-guiding component according to some embodiments of the present application. Fig. Figure 7C shows an exemplary structural view of a sound-guiding component according to some embodiments of the present application. Fig. Figure 7D shows an exemplary structural view of a sound-guiding component according to some embodiments of the present application. Fig. Figure 7E shows an exemplary structural view of a sound-guiding component according to some embodiments of the present application. In conjunction with Fig. Figures 7A to 7E each show different structural variants of the sound-guiding components, the main difference being the specific structure of the sound-guiding channel 741. In some embodiments, as in Fig. As shown in Figures 7A to 7C, the sound conduction channel 741 can be curved. In some embodiments, as in Fig. 7D and Fig. As shown in Figure 7E, the sound conduction channel 741 can be formed in a straight line. Referring to Fig. 7A to 7E show that the air-conducted sound waves, e.g., their frequency response and transmission path, exhibit certain differences depending on the structural differences of the sound conduction duct 741. It should be noted that the curved sound conduction duct 741, as described in Fig. Figures 7A to 7C show that the sound conduction channel can be bent in a straight line (e.g., at right angles). In some embodiments, the bent sound conduction channel can also be curved, for example, in an arc shape.

[0113] In some embodiments, such as in Fig. As shown in Figure 7A, the sound outlet of the sound conduction duct 741 can be directed towards the user's face, whereby the distance from the outlet end of the sound conduction duct 741 to the rear end face of the housing 720 can be increased, thereby optimizing the directivity and intensity of the air-conducted sound waves described above. Specifically, the outlet end of the sound conduction duct 741 is located at the upper end of the housing 720 shown in Figure 7A. Fig. 7A shown sound conduction duct 741 (i.e., one end face in Fig. 7, where b is located), wherein, when the acoustic output device is worn by the user, the upper end of the sound conduction channel 741 is directed towards the user's face. In some embodiments, as in Fig. As shown in Figure 7B, the sound exit direction of the sound conduction channel 741 can be directed towards the user's auricle, so that the aforementioned air conduction sound waves are more easily collected by the auricle and enter the ear canal, thereby optimizing the intensity of the aforementioned air conduction sound waves. Specifically, the exit end of the sound conduction channel 741 is located on a side wall of the housing 720 facing away from the housing 720. Fig. 7B shown sound conduction channel 741, wherein, when the acoustic output device is worn by the user, the exit end of the sound conduction channel 741 can be directed towards the user's ear. In some embodiments, as in Fig. As shown in Figure 7C, the sound exit direction of the sound conduction channel 741 can also be directed towards the user's ear canal, thereby optimizing the intensity of the air conduction sound waves described above. In some embodiments, the exit end of the sound conduction channel 741 can take the form of an oblique exit, the configuration of the oblique exit of the exit end of the sound conduction channel being shown in Figure 7C. Fig. 7C compared to the configuration of the sound conduction duct outlet in Fig. 7A can increase the cross-sectional area of ​​the sound conduction duct 741, which in turn is advantageous for the output of the air-conducted sound waves described above. The angled exit described here refers to the fact that the exit end of the sound conduction duct 741 forms a certain angle (greater than 0) relative to the lateral direction of the sound conduction duct 741 (i.e., the horizontal direction of the Fig. 7C shows a sound conduction channel). If the user Fig. When the acoustic output device shown in 7C is used, the exit end of the sound conduction channel 741 can be directed towards the user's ear canal.

[0114] In some embodiments, such as in Fig. As shown in Figure 7D, a wall surface of the sound conducting duct 741 can be a planar surface, so that the sound conducting duct 741 can be easily demolded during its manufacturing process. In some embodiments, as in Fig. As shown in Figure 7E, a wall surface of the sound conduction duct 741 can be a curved surface, which is advantageous in order to achieve an acoustic impedance matching between the sound conduction duct 741 and the air outside the acoustic output device, which in turn is advantageous for the output of the air conduction sound waves described above.

[0115] It is to be specified that the cross-sectional area at a particular point of the sound conducting duct 741 can refer to the smallest area that can result from cutting the sound conducting duct 741 through that point. In some embodiments, the straight through sound conducting duct can refer to the fact that from one of the inlet and outlet ends of the sound conducting duct, the entire other of the inlet and outlet ends of the sound conducting duct can be observed. For example, with reference to the in Fig. 7D and Fig. The length of the sound conducting channel 741, shown in Figure 7E, can be calculated as follows: First, the geometric center of the inlet end of the sound conducting channel 741 (e.g., point a) and the geometric center of the outlet end (e.g., point b) are determined; then, the geometric centers described above are connected to form a line segment ab, the length of which can be considered the length of the sound conducting channel 741. In some embodiments, the curved sound conducting channel may be such that one inlet end and one outlet end of the sound conducting channel cannot be observed from the other, or only a part of the other can be observed. For example, with reference to the curved sound conducting channel 741, Fig. 7A to 7C, the curved sound conduction duct is divided into two or more straight through partial conduction ducts, the sum of the lengths of the straight through partial conduction ducts being considered the length of the curved sound conduction duct. Specifically, in Fig. 7A to 7C furthermore, geometric centers (e.g. points c1, c2) of surfaces are determined at which intermediate bends are located; then these geometric centers are connected to form a line segment a-c1-b (or a-c1-c2-b), the length of this line segment being considered as the length of the sound conducting channel 741.

[0116] With renewed reference to Fig. 6 In some embodiments, the outlet end of the sound conduction duct can be covered with a sound-absorbing mesh. This mesh can be used to adjust the acoustic resistance of the air-conducted sound waves emitted through the sound outlet opening 621 to the environment of the acoustic output device 600, thereby attenuating the peak resonance frequency of the air-conducted sound waves in the mid- to high-frequency band or in the high-frequency band, thus smoothing the frequency response curve. In some embodiments, the sound-absorbing mesh covering the outlet end of the sound conduction duct can also partially isolate the second chamber 624 from the outside of the acoustic output device 600, thereby increasing the waterproof and dustproof performance of the acoustic output device 600.The acoustic resistance of the sound-absorbing mesh covering the outlet end of the sound-conducting duct can be less than or equal to 400 MKS Rayl. In some embodiments, the acoustic resistance of the sound-absorbing mesh covering the outlet end of the sound-conducting duct can be less than or equal to 350 MKS Rayl. In some embodiments, the acoustic resistance of the sound-absorbing mesh covering the outlet end of the sound-conducting duct can be less than or equal to 260 MKS Rayl. In some embodiments, the acoustic resistance of the sound-absorbing mesh covering the outlet end of the sound-conducting duct can be less than or equal to 150 MKS Rayl. In some embodiments, the porosity of the sound-absorbing mesh can be greater than or equal to 7%. In some embodiments, the porosity of the sound-absorbing mesh can be greater than or equal to 13%.In some embodiments, the porosity of the sound-absorbing mesh can be greater than or equal to 18%. In some embodiments, the pore size of the sound-absorbing mesh can be greater than or equal to 10 µm. In some embodiments, the pore size of the sound-absorbing mesh can be greater than or equal to 18 µm. In some embodiments, the pore size of the sound-absorbing mesh can be greater than or equal to 25 µm.

[0117] Fig. Figure 8 shows a schematic top view of the structure of a sound-absorbing mesh according to some embodiments of the present application. As in Fig. As shown in Figure 8, the sound-absorbing mesh can, in some embodiments, be woven from mesh threads, whereby parameters of the mesh threads (e.g., wire diameter, density, etc.) can influence the acoustic resistance of the sound-absorbing mesh. In some embodiments, four intersecting mesh threads, each consisting of several mesh threads spaced longitudinally apart and several mesh threads spaced transversely apart, can enclose a pore. The area of ​​a region enclosed by the center lines of each set of four mesh threads can be defined as S1, where the area of ​​a region (i.e., the pore) actually enclosed by the inner edges of each set of four mesh threads can be defined as S2, with the porosity being defined as S2 / S1.In some embodiments, the pore size can be expressed as the distance between any two adjacent mesh threads arranged longitudinally or transversely, e.g. the side length of the pore, etc.

[0118] Furthermore, it is provided that the effective area of ​​a particular passage opening or opening introduced in the present application can be defined as the product of its actual area and the porosity of the covering sound-absorbing mesh. For example, it is provided that if the outlet end of the sound-conducting duct 741 is covered with a sound-absorbing mesh, the effective area of ​​the outlet end of the sound-conducting duct 741 is the product of the actual area of ​​the outlet end of the sound-conducting duct 741 and the porosity of the sound-absorbing mesh; and that if the outlet end of the sound-conducting duct 741 is not covered with a sound-absorbing mesh, the effective area of ​​the outlet end of the sound-conducting duct 741 is the actual area of ​​the outlet end of the sound-conducting duct 741.Similarly, the effective areas of the outlet ends of the following described passage openings, such as pressure relief openings, sound regulation openings, etc., can also each be defined as a product of the actual area and the corresponding porosity, which is not repeated here.

[0119] In addition to bone conduction sound waves, the user primarily hears air conduction sound waves emitted to the surroundings of the acoustic output device 600 via the sound outlet opening 621 and the sound conduction channel, rather than air conduction sound waves emitted to the surroundings of the acoustic output device 600 via the pressure relief opening 622. To ensure that the user hears the air conduction sound waves emitted from the acoustic output device 600 via the sound conduction channel, in some embodiments the effective area of ​​the outlet end of the sound conduction channel can be larger than the effective area of ​​the outlet end of the pressure relief opening 622.

[0120] In some embodiments, the size of the pressure relief opening 622 can influence the smoothness of the venting of the first chamber 623 and the degree of vibration of the diaphragm 613, which in turn affects the acoustic expressiveness of the air-conducted sound waves emitted to the surroundings of the acoustic output device 600 via the sound outlet opening 621. Therefore, for a given effective area of ​​the outlet end of the sound conduction channel (e.g., a given actual area of ​​the outlet end of the sound conduction channel and / or a given porosity of the sound-absorbing mesh), the effective area of ​​the outlet end of the pressure relief opening 622 can be adjusted (e.g., by adjusting the size of the pressure relief opening 622).The actual area of ​​the outlet end of the pressure relief opening 622 and / or the acoustic resistance of the sound-absorbing mesh covering it) causes the air-conducting sound waves emitted via the sound outlet opening 621 to the surroundings of the acoustic output device 600 to change. In some embodiments, increasing the actual area of ​​the outlet end of the pressure relief opening 622 leads to an increase in the smoothness of the venting of the first chamber 623 and to an increase in the peak resonance intensity in the low frequency band or in the low to mid frequency band.In some embodiments, the additional provision of a sound-absorbing mesh at the outlet end of the pressure relief opening 622 impairs the venting of the first chamber 623, thus reducing the air-conducting sound waves emitted via the sound outlet opening 621 to the surroundings of the acoustic output device 600 at low to medium frequencies (e.g., 100 Hz to 200 Hz) and resulting in a relatively flat frequency response curve at low to medium frequencies. In some embodiments, the leakage sound at the pressure relief opening can decrease with an increase in the actual area of ​​the outlet end of the pressure relief opening and an increase in the acoustic resistance of the sound-absorbing mesh.

[0121] For example, it shows Fig. 9 A schematic diagram of the frequency response curves of air-conducted sound waves at a sound-guiding component of acoustic output devices with different configurations according to some embodiments of the present application. As in Fig. Figure 9 shows that the frequency response curve 9-1 is a frequency response curve of a sound-guiding component of an acoustic output device, which has a pressure relief opening with an actual area of ​​31.57 mm². 2 and without covering by a sound-absorbing mesh, wherein frequency response curve 9-2 is a frequency response curve at a sound-guiding component of an acoustic output device which includes a pressure relief opening with an actual area of ​​2.76 mm 2and without covering by a sound-absorbing mesh, and wherein the frequency response curve 9-3 is a frequency response curve at a sound-guiding component of an acoustic output device which includes a pressure relief opening with an actual area of ​​2.76 mm 2 , which is covered by a sound-absorbing mesh with an acoustic resistance of 1000 MKS Rayl and a porosity of 3%.

[0122] As in Fig. As shown in Figure 9, the actual area of ​​the pressure relief opening of the frequency response curve corresponding to frequency response curve 9-1 is the largest, with the peak resonance intensity (e.g., 98 dB) in the low frequency band or in the low to mid frequency band (e.g., 100 Hz to 200 Hz), corresponding to frequency response curve 9-1, also being the largest compared to frequency response curve 9-2 and frequency response curve 9-3, with the actual area of ​​the outlet end of the pressure relief opening 622 increasing the venting of the first chamber 623 becoming smoother and the peak resonance intensity increasing in the low frequency band or in the low to mid frequency band.The acoustic resistance of the sound-absorbing mesh corresponding to frequency response curve 9-3 is greatest, with the peak resonance intensity in the low frequency band or the low to mid frequency band corresponding to frequency response curve 9-3 being smallest compared to frequency response curve 9-1 and frequency response curve 9-2, with frequency response curve 9-3 being flatter in the low frequency band or the low to mid frequency band than frequency response curve 9-1 and frequency response curve 9-2, with the additional provision of a sound-absorbing mesh at the outlet end of the pressure relief opening 622 impairing the venting of the first chamber 623, so that the air-conducting sound waves emitted via the sound outlet opening 621 to the surroundings of the acoustic output device 600 are at low to mid frequencies (e.g.100 Hz to 200 Hz) are reduced and the frequency response curve is relatively flat at low to medium frequencies.

[0123] As another example, Fig. 10 A schematic diagram of the frequency response curves of air-conducted sound waves emitted through a sound outlet opening to the surroundings of an acoustic output device, according to some embodiments of the present application. As in Fig. Figure 10 shows that the frequency response curve 10-1 is a frequency response curve at a sound outlet opening of an acoustic output device, which has a pressure relief opening with an actual area of ​​2.76 mm². 2 and without being covered by a sound-absorbing mesh. Frequency response curve 10-2 is a frequency response curve at a sound outlet opening of an acoustic output device, which has a pressure relief opening with an actual area of ​​31.57 mm².2 , which is covered by a sound-absorbing mesh with an acoustic resistance of 145 MKS Rayl and a porosity of 14%. Frequency response curve 10-3 is a frequency response curve at a sound outlet opening of an acoustic output device, which is a pressure relief opening with an actual area of ​​71.48 mm². 2 , which is covered by a sound-absorbing mesh with an acoustic resistance of 290 MKS Rayl and a porosity of 7%. Referring to Fig. In the frequency response curve corresponding to frequency response curve 10-3, the actual area of ​​the pressure relief opening is largest and the acoustic resistance of the sound-absorbing mesh is also larger, so that the effective area of ​​the outlet end of the pressure relief opening can be kept approximately constant, so that the smoothness of the venting at the individual pressure relief openings with different actual areas communicating with the first chamber is approximately the same, which in turn leads to the flatness of the frequency response curves of the air conduction sound waves emitted by acoustic output devices having pressure relief openings with different actual areas via the sound outlet opening to the environment of the acoustic output device being approximately identical across the entire frequency band.

[0124] As another example, Fig. 11 A schematic diagram of the frequency response curves of air-conducted sound waves emitted through a pressure relief opening to the surroundings of an acoustic output device, according to some embodiments of the present application. As in Fig. Figure 11 shows that the frequency response curve 11-1 is a frequency response curve at a pressure relief opening of an acoustic output device, which has a pressure relief opening with an actual area of ​​2.76 mm². 2 and without being covered by a sound-absorbing mesh. Frequency response curve 11-2 is a frequency response curve at a pressure relief vent of an acoustic output device, which has a pressure relief vent with an actual area of ​​31.57 mm². 2, which is covered by a sound-absorbing mesh with an acoustic resistance of 145 MKS Rayl and a porosity of 14%. Frequency response curve 11-3 is a frequency response curve at a pressure relief port of an acoustic output device, which has a pressure relief port with an actual area of ​​71.48 mm². 2, which is covered by a sound-absorbing mesh with an acoustic resistance of 290 MKS Rayl and a porosity of 7%. In some embodiments, the frequency response curves of the air-conducted sound waves emitted to the surroundings of the acoustic output device via the sound outlet opening through acoustic output devices with different pressure relief openings are approximately identical, but the frequency response curves of the air-conducted sound waves emitted to the surroundings of the acoustic output device via different pressure relief openings are different. This can also be understood to mean that the sound losses at different pressure relief openings are different. With reference to Fig. Figure 11 represents the frequency response curves corresponding to the actual areas of the pressure relief openings from largest to smallest, namely frequency response curve 11-3, frequency response curve 11-2, and frequency response curve 11-1. Accordingly, the frequency response curves corresponding to frequency response curves 11-3, 11-2, and 11-1 are shifted downwards overall. Fig. 11. It is evident that the frequency response curve of the air-conducted sound waves emitted to the surroundings of the acoustic output device via the pressure relief opening shifts downwards with an increase in the actual area of ​​the outlet end of the pressure relief opening and an increase in the overall acoustic resistance of the sound-absorbing mesh. This can also be interpreted as meaning that the intensity of the sound loss at the pressure relief opening can decrease with an increase in the actual area of ​​the outlet end of the pressure relief opening and an increase in the acoustic resistance of the sound-absorbing mesh.

[0125] For example, the size of the pressure relief vent can be relatively large, so that the resonance peak (Helmholtz resonance) of the first chamber of the enclosure can correspond to a higher frequency. In this way, the low- to mid-frequency sound loss propagating from the pressure relief vent can be suppressed. In some embodiments, the larger the size of the vent, the smaller the acoustic resistance can be, and the lower the sound pressure level of the air-conducting sound waves generated at the pressure relief vent, thus reducing the sound loss at the pressure relief vent. In some embodiments, while ensuring that the frequency response curve of the air-conducting sound waves remains substantially unchanged at the sound-guiding component, the size (i.e., the vent's diameter) can be reduced.The actual area of ​​the pressure relief opening can be increased, and / or the acoustic resistance of the sound-absorbing mesh at the pressure relief opening can be increased to minimize sound loss at the pressure relief opening. In some embodiments, this is possible provided that the effective area of ​​the outlet end of the pressure relief opening is less than or equal to 2.76 mm². 2 The sound loss at the pressure relief opening can be reduced by increasing the actual area of ​​the outlet end of the pressure relief opening and the porosity of the sound-absorbing mesh.

[0126] It should be noted that, due to the limited size of the housing 620, a single pressure relief opening 622 cannot be too large. Based on this, at least one or at least two, e.g., three, pressure relief openings 622 can be provided.

[0127] Based on the detailed description above, the effective area of ​​the sound conduction channel's outlet can be larger than the effective area of ​​the outlet of each pressure relief opening 622, so that the user hears air-conducted sound waves emitted through the sound outlet 621 to the environment of the acoustic output device 600. Based on the definition of effective area, the actual area of ​​the sound conduction channel's outlet can be larger than the actual area of ​​the outlet of each pressure relief opening 622. Furthermore, it is provided that the effective area of ​​the sound conduction channel's outlet can be greater than or equal to the sum of the effective areas of the outlets of all pressure relief openings 622.Preferably, the ratio of the sum of the effective areas of the outlet ends of all pressure relief openings 622 to the effective area of ​​the outlet end of the sound conduction duct can be greater than or equal to 0.08. In some embodiments, the ratio of the sum of the effective areas of the outlet ends of all pressure relief openings 622 to the effective area of ​​the outlet end of the sound conduction duct can be greater than or equal to 0.15. In some embodiments, the ratio of the sum of the effective areas of the outlet ends of all pressure relief openings 622 to the effective area of ​​the outlet end of the sound conduction duct can be greater than or equal to 0.25. In some embodiments, the ratio of the sum of the effective areas of the outlet ends of all pressure relief openings 622 to the effective area of ​​the outlet end of the sound conduction duct can be greater than or equal to 0.3.As an exemplary illustration, the effective area of ​​the outlet end of all pressure relief openings 622 can be greater than or equal to 2.5 mm. 2 to ensure the smoothness of the venting of the first chamber 623 and thereby to facilitate the improvement of the acoustic expressiveness of an air conduction sound emitted via the sound outlet opening 621 to the environment of the acoustic output device 600 and to reduce the sound loss at the pressure relief opening 622.

[0128] In some embodiments, the actual area of ​​the exit end of the sound conduction channel can be greater than or equal to 4.8 mm². 2 Preferably, the actual area of ​​the exit end of the sound conduction channel can be greater than or equal to 8 mm². 2 In some embodiments, the sum of the actual areas of the outlet ends of all pressure relief openings 622 may be greater than or equal to 2.6 mm². 2In some embodiments, the actual area of ​​the outlet ends of all pressure relief openings 622 may be greater than or equal to 10 mm². 2 If the number of pressure relief openings 622 is one, then the sum of the actual areas of the outlet ends of all pressure relief openings 622 is also the actual area of ​​the outlet end of a pressure relief opening 114. In some embodiments, the actual area of ​​the outlet end of the sound conduction duct can be 25.3 mm². 2 Three pressure relief openings 622 may be provided. For example, the pressure relief openings 622 may comprise a first pressure relief opening, a second pressure relief opening, and a third pressure relief opening, wherein the actual areas of the outlet ends of each pressure relief opening are 11.4 mm². 2 , 8.4 mm 2 and 5.8 mm 2 can amount to.

[0129] With reference to Fig. In some embodiments, the housing 620 can be provided with at least one sound-regulating opening 626, the sound-regulating opening 626 being used to reduce standing waves generated during the operation of the acoustic output device 600. Specifically, the air-conducting sound waves (also referred to as original air-conducting sound waves) generated by the acoustic air-duct assembly can collide with the lower surface of the housing 620 and be reflected from the lower surface of the housing 620 during their transmission. Reflected air-conducting sound waves and original air-conducting sound waves can form standing waves, leading to distortion of the sound output at the sound outlet opening 621.In some embodiments, by providing the sound regulating opening 626 on the housing 620, a portion of the air-conducting sound waves can be directly emitted from the sound regulating opening 626, thus preventing partially reflected air-conducting sound waves and the original air-conducting sound waves from forming standing waves. In some embodiments, the sound regulating opening 626 can be located on a side wall that is not adjacent to a side wall of the housing on which the sound outlet opening 621 is located. In some embodiments, the sound regulating opening 626 can be located on one or more side walls that are adjacent to a side wall on which the sound outlet opening 621 is located. For example, the housing 620 can comprise at least four side walls physically connected one after the other.The sound outlet opening 621 can be provided on a first side wall, and the pressure relief opening 622 can be provided on a second side wall that does not adjoin the first side wall. The first and second side walls can be substantially parallel. The sound regulating opening 626 can be provided on the second side wall, a third side wall, a fourth side wall, etc. The third and fourth side walls can adjoin the first side wall. In some embodiments, the size (e.g., area) of the sound regulating opening 626 can be 1 mm. 2 up to 50mm 2 In some embodiments, the size of the sound regulation opening can be 626.5 mm. 2 up to 30 mm 2 In some embodiments, the size of the sound regulation opening can be 626 x 10 mm. 2 up to 20 mm 2 be.

[0130] In some embodiments, the sound-regulating opening 626 can also be located on a side wall opposite a side wall of the housing on which the sound outlet opening 621 is located, wherein the sound-regulating opening 626 can increase the resonant frequency of the air in the second chamber 624 and / or the first chamber 623. In some embodiments, the resonant frequencies of the air in the second chamber 624 and the resonant frequencies of the air in the first chamber 623 can be the same. In some embodiments, the resonant frequency of the air in the second chamber 624 and / or the first chamber 623 can be equal to or greater than 4000 Hz, or equal to or greater than 5000 Hz, etc. In some embodiments, the resonant frequency of the air in the second chamber 624 can be in a range of 5500 Hz to 6000 Hz, or in a range of 4000 Hz to 6000 Hz, etc.In some embodiments, the resonance frequency of the air in the first chamber 623 can be in a range of 4500 Hz to 5000 Hz or in a range of 4000 Hz to 5000 Hz, etc.

[0131] In some embodiments, the sound-regulating opening 626 can be a through-hole. At least one of the one or more sound-regulating openings 626 can be covered with an acoustic resistance material (e.g., tuning wadding). In some embodiments, the acoustic resistance material can have an acoustic resistance in the range of 5 to 500 MKS rays, or in the range of 10 to 260 MKS rays, or in the range of 20 to 200 MKS rays, etc.

[0132] In some embodiments, a damping structure, such as a damping mesh, can be provided at the sound regulating opening 626 to increase the volume of sound emitted from the sound conduction duct and to reduce the volume of sound loss at the sound regulating opening 626. The damping structure at the sound regulating opening 626 can be configured to improve acoustic resistance and adjust, for example, the amplitude of the sound waves exiting the sound regulating opening 626, e.g., to decrease it. If the amplitude of the sound waves exiting the sound regulating opening 626 and the amplitude of the sound waves exiting the pressure relief opening 622 are equal or approximately equal, the sound waves exiting the sound regulating opening 626 and the sound waves exiting the pressure relief opening 622 can cancel each other out.At this point, the sound loss can be reduced and the amount of sound output from the sound conduction duct can be increased. It should be noted that in some embodiments, the number of sound regulating openings 626 and the number of pressure relief openings 622 may be the same or different.

[0133] In some embodiments, the number of at least one sound-regulating opening 626 can be one. For example, the at least one sound-regulating opening 626 can comprise a first sound-regulating opening, wherein the sound outlet opening 621 or the first sound-regulating opening is provided in the first side wall or the second side wall of the housing 620, respectively. In some embodiments, the number of at least one sound-regulating opening 626 can be two. For example, the at least one sound-regulating opening 626 can further comprise a second sound-regulating opening, wherein the second sound-regulating opening can be provided in the third side wall or the fourth side wall of the housing 620.

[0134] In some embodiments, the membrane 631 may not be connected to the acoustic bone conduction assembly 610, with a peripheral side of the membrane 631 being directly physically connected to the inner wall of the housing 620, thereby dividing the chamber inside the housing 620 into a first chamber 623 and a second chamber 624. In some embodiments, several membranes 631, for example two or three, may be provided, with the multiple membranes being physically connected to the magnetic circuit system 611 of the acoustic bone conduction assembly 610 and dividing the chamber inside the housing 620 into a first chamber 623 and a second chamber 624. Regarding a case in which the number of membranes 631 is two, it can be stated that Fig. 20B and Fig. Reference is made to 20C, which is not repeated here.

[0135] Fig. Figure 12A shows a schematic view of a sound pressure distribution in a second chamber of an acoustic output device without sound regulating openings according to some embodiments of the present application. Fig. Figure 12B shows a schematic view of a sound pressure distribution in a second chamber of an acoustic output device with a sound control opening according to some embodiments of the present application. In some embodiments, the sound conduction channel can communicate with the second chamber through the sound outlet opening, thereby forming a typical Helmholtz resonator structure that has one or more resonance peaks. In some embodiments, the sound pressure distribution in the second chamber can be investigated at resonance of the Helmholtz resonator structure. In conjunction with Fig. 12A and Fig. 6. In the second chamber 624, a high-pressure area (the darker area in) can be located away from the sound outlet opening 621. Fig. 12A) and a low-pressure area located near the sound outlet opening 621 (the lighter area in Fig. 12A) are formed, wherein the high-pressure region refers to a region with higher sound pressure in the second chamber and the low-pressure region refers to a region with lower sound pressure in the second chamber. In some embodiments, it can be assumed that standing waves occur in the second chamber 624 when the Helmholtz resonator structure resonates. The wavelength of the standing wave corresponds to the size of the second chamber 624. For example, the larger the size of the second chamber 624 (i.e., the greater the distance between the low-pressure region and the high-pressure region), the longer the wavelength of the standing wave and the lower the resonant frequency of the Helmholtz resonator structure. In some embodiments, in conjunction with Fig. 12B by destroying the high-pressure area, sound that would originally be reflected in the high-pressure area cannot be reflected, and thus standing waves cannot be generated. When the Helmholtz resonator structure resonates, the high-pressure area in the second chamber 624 shifts inwards towards the low-pressure area, so that the wavelength of the standing wave becomes shorter, thereby increasing the resonant frequency of the Helmholtz resonator structure. In some embodiments, the method of destroying the high-pressure area may include, but is not limited to, providing a through-opening (i.e., a sound-regulating opening 626) in the high-pressure area that communicates with the second chamber 624.For example, the method of destroying the high-pressure area may consist of providing a line, etc., that communicates with the environment of the acoustic output device 600.

[0136] Fig. Figure 13 shows a schematic diagram of the frequency response curves of airborne sound waves at a sound-guiding component according to some embodiments of the present application. As in Fig. As shown in Figure 13, frequency response curve 13-1 is a frequency response curve for a sound-guiding component of an acoustic output device when the sound-regulating orifice is in a closed state. Frequency response curve 13-2 is a frequency response curve for a sound-guiding component of an acoustic output device when the actual area of ​​the sound-regulating orifice is 1.7 mm². 2The frequency response curve 13-3 is a frequency response curve for a sound-guiding component of an acoustic output device when the actual area of ​​the sound regulation opening is 2.8 mm². 2 Frequency response curve 13-4 is a frequency response curve for a sound-guiding component of an acoustic output device, where the actual area of ​​the sound regulation opening is 28.44 mm². 2 is. In conjunction with Fig. 6. The sound regulating opening 626 can be provided in the high-pressure area within the second chamber 624, so that the sound regulating opening 626 can effectively disrupt the high-pressure area. For illustrative purposes only, the sound regulating opening 626 can be provided on a side wall of the housing 620 that is opposite a side wall of the housing 620 on which the sound outlet opening 621 and the sound conduction duct are located. With reference to Fig. Figure 13 represents the frequency response curves corresponding to the actual areas of the sound-regulating openings 626, from largest to smallest. These curves are, in order, frequency response curve 13-4, frequency response curve 13-3, frequency response curve 13-2, and frequency response curve 13-1. As the actual area of ​​the outlet end of the sound-regulating opening increases, the overall frequency response curve of the air-conducted sound waves at the sound-guiding component shifts downwards. This means that across the entire frequency band, the intensity of the air-conducted sound waves emitted from the outlet end of the sound-guiding component decreases with increasing actual area of ​​the outlet end of the sound-regulating opening. In some embodiments, the frequency response curve of the air-conducted sound waves emitted via the sound outlet opening 621 to the surroundings of the acoustic output device 600 may exhibit a resonance peak.In the case where the sound regulating opening 626 is not covered with a sound-absorbing mesh, the degree of destruction of the above-mentioned high-pressure area by the sound regulating opening 626 can be controlled by adjusting the actual area of ​​the outlet end of the sound regulating opening 626, thereby adjusting the peak resonance frequency of the resonance peak.

[0137] In some embodiments, the destructive effect of the sound-regulating opening 626 on the aforementioned high-pressure area is more pronounced, and the peak resonance frequency of the resonance peak in the frequency response curve is higher, the larger the actual area of ​​the outlet end of the sound-regulating opening 626. In some embodiments, the peak resonance frequency of the resonance peak in an open state of the sound-regulating opening 626 shifts to higher frequencies compared to a peak resonance frequency of the resonance peak in a closed state of the sound-regulating opening 626, with the magnitude of the shift being greater than or equal to 500 Hz. Preferably, the magnitude of the shift is greater than or equal to 1 kHz.In some embodiments, the peak resonance frequency of the resonance peak in the open state of the sound control opening 626 can be greater than or equal to 2 kHz, so that the acoustic output device 600 has a better speech output effect. Preferably, the peak resonance frequency can be greater than or equal to 3.5 kHz. More preferably, the peak resonance frequency can be greater than or equal to 4.5 kHz. It should be noted that the open state of the sound control opening 626 here can refer to a situation in which the housing 620 is provided with a sound control opening and the sound control opening functions normally. Accordingly, the closed state of the sound control opening 626 can refer to a situation in which the housing 620 is not provided with a sound control opening or the housing 620 is provided with a sound control opening, but it is closed and cannot function normally.

[0138] It should be noted that, due to the limited size of the housing 620, a single sound-regulating opening 626 cannot be too large. Based on this, at least one sound-regulating opening 626 can be provided, for example, the first sound-regulating opening and the second sound-regulating opening, which includes the sound-regulating opening 626. In some embodiments, the sound-regulating opening 626 can also be located in any area between the high-pressure area and the low-pressure area in the second chamber 624, which is not limited here.

[0139] In some embodiments, with reference to Fig. 6 and Fig. 10. Due to the additional provision of the sound regulating opening 626 on the second chamber 624, some of the sound escapes from the sound regulating opening 626 (i.e., a sound loss occurs at the sound regulating opening 626), which causes the overall frequency response curve of the air-conducting sound waves emitted via the sound outlet opening 621 to the surroundings of the acoustic output device 600 to shift downwards. Therefore, in some embodiments, the outlet end of at least part of the sound regulating openings 626 can be covered with a sound-absorbing mesh, so that, with the simultaneous destruction of the high-pressure area in the second chamber 624, the sound regulating opening 626 prevents sound from escaping as much as possible.

[0140] Fig. Figure 14 shows a schematic diagram of the frequency response curves of airborne sound waves at a sound-guiding component according to some further embodiments of the present application. As in Fig. As shown in Figure 14, frequency response curve 14-1 is a frequency response curve for a sound-guiding component of an acoustic output device when no sound-regulating opening is provided. Frequency response curve 14-2 is a frequency response curve for a sound-guiding component of an acoustic output device when no sound-absorbing mesh is provided at the sound-regulating opening. Frequency response curve 14-3 is a frequency response curve for a sound-guiding component of an acoustic output device when the sound-absorbing mesh covering the sound-regulating opening has an acoustic resistance of 145 MKS Rayl. With reference to Fig. 14 and Fig. 6. By additionally providing a sound-absorbing mesh at the outlet end of the sound-regulating opening 626, it can be ensured that no significant reflected sound waves (i.e., no standing waves) are present in the second chamber 624 at the sound-regulating opening 626, thereby shifting the high-pressure area in the second chamber 624 inwards. In some embodiments, the additional provision of a sound-absorbing mesh at the outlet end of the sound-regulating opening 626 can also, to a certain extent, prevent sound from escaping the sound-regulating opening 626, so that more sound can be emitted via the sound outlet opening 621 to the surroundings of the acoustic output device 600. Fig. 14 shows that the peak resonance intensity in the low to mid frequency band of the frequency response curve 14-3 is increased compared to the peak resonance intensity in the low to mid frequency band of the frequency response curve 14-2.

[0141] In some embodiments, the additional provision of a sound-absorbing mesh at the outlet end of the sound-regulating opening 626 allows the peak resonance intensity in the low frequency band (e.g., 90 Hz to 200 Hz) to increase significantly in the frequency response curve, thus increasing the loudness of the air-conducted sound waves. The peak resonance intensity in the high frequency band (e.g., 500 Hz to 1000 Hz) is reduced to a certain extent, resulting in a flatter frequency response curve in the high frequency band and a more balanced sound quality at high frequencies. In some embodiments, the effective area of ​​the outlet end of the sound-regulating opening 626 (e.g.,the actual area of ​​the outlet end of the sound regulating opening 626 and / or the acoustic resistance of the sound-absorbing mesh covering it) allows the air-conducting sound waves emitted via the sound outlet opening 621 to the environment of the acoustic output device 600 to change.

[0142] Based on the above description, in some embodiments the effective area of ​​the outlet end of the first sound-regulating orifice can be larger than the effective area of ​​the outlet end of the second sound-regulating orifice. In some embodiments the actual area of ​​the outlet end of the first sound-regulating orifice can be larger than the actual area of ​​the outlet end of the second sound-regulating orifice. In some embodiments the actual area of ​​the outlet end of the first sound-regulating orifice is greater than or equal to 3.8 mm².2 be, and / or, that the actual area of ​​the outlet end of the second sound regulation opening is greater than or equal to 2.8 mm 2 This may be the case. In some embodiments, the sum of the effective areas of the outlet ends of all sound-regulating openings may be greater than or equal to 1.5 mm². 2 In some embodiments, the porosity of the sound-absorbing meshes covering the outlets of the first and second sound-regulating openings can be greater than or equal to 13%. In some embodiments, the porosity of the sound-absorbing meshes covering the outlets of the first and second sound-regulating openings can be less than or equal to 16%.

[0143] In some embodiments, in conjunction with Fig. 6. The phases of the air-conducted sound waves emitted to the surroundings of the acoustic output device 600 via the pressure relief opening 622 and the sound outlet opening 621, respectively, may be opposite. Therefore, the pressure relief opening 622 may be located away from the sound outlet opening 621 to avoid destructive interference of the air-conducted sound waves emitted to the surroundings of the acoustic output device 600 via the pressure relief opening 622 and the sound outlet opening 621, respectively. For example, the pressure relief opening 622 and the sound outlet opening 621 may be located on two opposite side walls in the housing 620.In some embodiments, the sound regulating opening 626 and the sound outlet opening 621 can be considered as the low-pressure area in the second chamber 624, and the area in the second chamber 624 furthest from the sound outlet opening 621 can be considered as the high-pressure area. In some embodiments, the sound regulating opening 626 can preferably be located in the high-pressure area of ​​the second chamber 624 to disrupt the original high-pressure area and shift it towards the low-pressure area.

[0144] Since in some embodiments the pressure relief opening 622 communicates with the first chamber 623 and the sound regulation opening 626 communicates with the second chamber 624, the phases of the air-conducting sound waves emitted to the environment of the acoustic output device 600 via the pressure relief opening 622 and the sound regulation opening 626, respectively, can be opposite, which is why the sound loss of the pressure relief opening 622 and the sound regulation opening 626 can be reduced by destructive interference. In some embodiments, at least some of the pressure relief openings 622 and at least some of the sound regulation openings 626 can be arranged adjacent to each other (e.g.,(At least part of the pressure relief openings 622 and at least part of the sound control openings 626 can be arranged in two adjacent side walls of the housing 620), so that the air-conducted sound waves emitted to the surroundings of the acoustic output device 600 via the pressure relief opening 622 and the sound control opening 626 can interfere destructively. To allow the sound loss from the pressure relief opening 622 and the sound control opening 626 to interfere more effectively, the distance between the pressure relief opening 622 and the sound control opening 626 can be made as small as possible in some embodiments. For example, in some embodiments, the distance between an adjacent pressure relief opening 622 and a sound control opening 626 can be less than or equal to 2 mm.Specifically, the minimum distance between the contours of the outlet ends of the pressure relief opening 622 and the sound regulation opening 626, which are arranged adjacently, can be less than or equal to 2 mm.

[0145] Fig. Figure 15 shows a schematic diagram of the frequency response curves for the sound loss of an acoustic output device according to some embodiments of the present application. As in Fig. As shown in Figure 15, frequency response curve 15-1 is a loss-of-sound frequency response curve with a first peak resonance frequency f1 of 3500 Hz and a second peak resonance frequency f2 of 5600 Hz. Frequency response curve 15-2 is a loss-of-sound frequency response curve with a first peak resonance frequency f1 of 4500 Hz and a second peak resonance frequency f2 of 5600 Hz. Frequency response curve 15-3 is a loss-of-sound frequency response curve with a first peak resonance frequency f1 of 5000 Hz and a second peak resonance frequency f2 of 5600 Hz. With reference to Fig. 15. The frequency response curve of the air-conducted sound waves emitted to the surroundings of the acoustic output device 600 via the pressure relief opening 622 may exhibit a first resonance peak corresponding to the first peak resonance frequency f1; the frequency response curve of the air-conducted sound waves emitted to the surroundings of the acoustic output device 600 via the sound control opening 926 may exhibit a second resonance peak corresponding to the second peak resonance frequency f2. The peak resonance frequency f1 of the first resonance peak and the peak resonance frequency f2 of the second resonance peak may each be greater than or equal to 2 kHz, and |f1 - f2| / f1 ≤ 60%.In some embodiments, as the difference between the peak resonance frequency f1 of the first resonance peak and the peak resonance frequency f2 of the second resonance peak gradually decreases, the frequency bandwidth in which the sound loss can be reduced is broadened (i.e., the frequency response curve becomes increasingly flatter), thus reducing the sound loss of the acoustic output device 600. This can also be understood as improving the effect of the destructive interference of the air-conducted sound waves emitted to the surroundings of the acoustic output device 600 via the pressure relief port 622 and the sound control port 626, respectively. Preferably, the peak resonance frequency f1 of the first resonance peak and the peak resonance frequency f2 of the second resonance peak can each be greater than or equal to 3.5 kHz, and |f1 - f2| ≤ 2 kHz.Based on this, it can be ensured that the air conduction sound waves, which are emitted to the environment of the acoustic output device 600 via the pressure relief opening 622 and the sound regulation opening 626 respectively, interfere destructively, preferably in the high frequency band (e.g. 2 kHz to 4 kHz).

[0146] Since the first chamber 623 contains structures such as a coil carrier, the wavelength of the standing wave in the first chamber 623 is relatively long in some embodiments. The sound regulating orifice 626 and the sound outlet orifice 621 can disrupt the high-pressure area, resulting in a relatively short wavelength of the standing wave in the second chamber 624. Therefore, the peak resonance frequency of the first resonance peak can be lower than the peak resonance frequency of the second resonance peak. In some embodiments, shifting the peak resonance frequency of the first resonance peak towards a higher frequency to approximate the peak resonance frequency of the second resonance peak can improve the destructive interference of the air-conducting sound waves emitted to the surroundings of the acoustic output device 600 via the pressure relief orifice 622 and the sound regulating orifice 626, respectively.In some embodiments, for the pressure relief opening 622 and the sound control opening 626, which are arranged adjacently, the effective area of ​​the outlet end of a pressure relief opening 622 can be larger than the effective area of ​​the outlet end of a sound control opening 626, based on the Helmholtz resonator. In some embodiments, for the pressure relief opening 622 and the sound control opening 626, which are arranged adjacently, the ratio of the effective area of ​​the outlet end of a pressure relief opening 622 to the effective area of ​​the outlet end of a sound control opening 626 can be less than or equal to 2.As an exemplary illustration, for the pressure relief opening 622 and the sound control opening 626, which are arranged adjacently, the actual area of ​​the outlet end of a pressure relief opening 622 can be larger than the actual area of ​​the outlet end of a sound control opening 626. In some embodiments, the outlet ends of the pressure relief opening 622 and the sound control opening 626, which are arranged adjacently, can furthermore be covered with a first sound-absorbing mesh and a second sound-absorbing mesh, wherein the porosity of the first sound-absorbing mesh can be greater than the porosity of the second sound-absorbing mesh.

[0147] In some embodiments, the sound loss of the sound regulating opening 626 can also be reduced by adjusting the actual area, the effective area, or the acoustic resistance of the sound conduction channel of the sound-guiding component 640 (in Fig. (shown in Figure 6) can be reduced. In some embodiments, the effective area of ​​the sound conduction channel outlet can be larger than the effective area of ​​the outlet of each of the sound control openings that communicate with the second chamber on the housing, so that the user hears air-conducted sound waves emitted through the sound outlet to the surroundings of the acoustic output device. In some embodiments, the actual area of ​​the sound conduction channel outlet can be larger than the actual area of ​​the outlet of each of the sound control openings. In some embodiments, the effective area of ​​the sound conduction channel outlet can be larger than the sum of the effective areas of the outlets of all the sound control openings.In some embodiments, the ratio of the sum of the effective areas of the outlets of all sound-regulating openings to the effective area of ​​the outlet of the sound-conducting duct can be greater than or equal to 0.08. In some embodiments, the ratio of the sum of the effective areas of the outlets of all sound-regulating openings to the effective area of ​​the outlet of the sound-conducting duct can be greater than or equal to 0.1. In some embodiments, the ratio of the sum of the effective areas of the outlets of all sound-regulating openings to the effective area of ​​the outlet of the sound-conducting duct can be greater than or equal to 0.15. In some embodiments, the sum of the effective areas of the outlets of all sound-regulating openings can be greater than or equal to 1.5 mm². 2If the number of sound-regulating openings is one, then the sum of the effective areas of the exit ends of all sound-regulating openings is also the effective area of ​​the exit end of that single sound-regulating opening. In this way, not only can the peak resonance frequency of the air-conduction sound waves emitted through the sound exit opening to the surroundings of the acoustic output device be shifted to higher frequencies, but the sound loss at the sound-regulating opening can also be reduced.

[0148] Fig. Figure 16A shows a sectional view of a housing of an acoustic output device according to some embodiments of the present application. Fig. Figure 16B shows a sectional view of an acoustic output device according to some embodiments of the present application. Fig. Figure 16C shows a left side view of a housing of an acoustic output device according to some embodiments of the present application. Fig. Figure 16D shows a top view of a housing of an acoustic output device according to some embodiments of the present application. To more intuitively reflect that different types of openings may be provided on the same side wall (for example, the sound control opening and the sound regulation opening may be located simultaneously on the first side wall), Fig. 16A as a sectional view of the first chamber and Fig. 16B can be viewed as a sectional view of the second chamber.

[0149] Combined with Fig. 16A-16D, a housing (e.g., the housing 620) can comprise a first side wall 6231 and a second side wall 6232, located on two opposite sides of an acoustic bone conduction assembly (e.g., the acoustic bone conduction assembly 610), as well as a third side wall 6233 and a fourth side wall 6234, which connect the first side wall 6231 and the second side wall 6232 and are spaced apart from each other. In some embodiments, the third side wall 6233 and the fourth side wall 6234 can be arcuate, so that the housing (e.g., the housing 620) as a whole has a racetrack shape. In some embodiments, the first side wall 6231 may be located closer to the user's ear than the second side wall 6232, and the third side wall 6233 may be located closer to a fastening component (e.g. ear hook, etc.) of the acoustic output device 600 than the fourth side wall 6234.In some embodiments, a sound outlet opening (e.g., the sound outlet opening 621) can be provided on the first side wall 6231 so that the user hears air-conducted sound waves emitted via a sound outlet opening (e.g., the sound outlet opening 621) and a sound conduction duct to the surroundings of the acoustic output device (e.g., the acoustic device 600). In some embodiments, the first pressure relief opening 6221 and the first sound regulation opening 6261 can each be provided in the second side wall 6232, so that they are each located further away from the sound outlet opening (e.g., the sound outlet opening 621).In some embodiments, the second pressure relief opening 6222 and the second sound regulation opening 6262 can be provided in one of the third side wall 6233 and the fourth side wall 6234, while the third pressure relief opening 6223 can be provided in the other of the third side wall 6233 and the fourth side wall 6234.

[0150] As in Fig. As shown in Figure 16A, a pressure relief opening (e.g., the pressure relief opening 622) can comprise a first pressure relief opening 6221 and a second pressure relief opening 6222. The first pressure relief opening 6221 is located further away from the sound outlet opening 621 (in Figure 16A). Fig. (shown in Figure 16B) is located further away than the second pressure relief opening 6222. At this point, the effective area of ​​the outlet end of the first pressure relief opening 6221 can be larger than the effective area of ​​the outlet end of the second pressure relief opening 6222. In this way, both the size of the housing (e.g., the housing 620) and the venting requirements of the first chamber (e.g., the first chamber 623) can be taken into account; it can also be made possible for the first pressure relief opening 6221, with its relatively large venting capacity, to be located as far away as possible from the sound outlet opening (e.g., the sound outlet opening 621), thereby reducing the influence of the sound loss at the pressure relief opening 622 on the air-conducting sound waves at the sound outlet opening (e.g., the sound outlet opening 621).Furthermore, it is provided that the pressure relief opening 622 may also include a third pressure relief opening 6223, wherein the first pressure relief opening 6221 may also be located further away from the sound outlet opening (e.g., the sound outlet opening 621) than the third pressure relief opening 6223. The effective area of ​​the outlet end of the second pressure relief opening 6222 may be larger than the effective area of ​​the outlet end of the third pressure relief opening 6223. As an exemplary illustration, the sound outlet opening (e.g., the sound outlet opening 621) and the first pressure relief opening 6221 may be located on two opposite sides of the acoustic bone conduction assembly 610, while the second pressure relief opening 6222 and the third pressure relief opening 6223 may be located opposite each other and situated between the sound outlet opening 621 and the first Pressure relief opening 6221 may be located.

[0151] In some embodiments, the outlet end of at least some of the pressure relief openings (e.g., the pressure relief openings 622) can be covered with a sound-absorbing mesh to adjust the effective area of ​​the outlet end of the pressure relief opening (e.g., the pressure relief opening 622). For illustrative purposes, this embodiment uses an example in which the outlet ends of the pressure relief openings (e.g., the pressure relief openings 622) are each covered by a sound-absorbing mesh with the same acoustic resistance. Based on this, the corresponding effective area can be obtained by adjusting the actual area of ​​the outlet end of the pressure relief opening (e.g., the pressure relief opening 622).For example, in some embodiments, the actual area of ​​the outlet end of the first pressure relief opening 6221 may be larger than the actual area of ​​the outlet end of the second pressure relief opening 6222, wherein the actual area of ​​the outlet end of the second pressure relief opening 6222 may be larger than the actual area of ​​the outlet end of the third pressure relief opening 6223.

[0152] As in Fig. As shown in Figure 16B, a sound-regulating orifice (e.g., the sound-regulating orifice 626) can comprise a first sound-regulating orifice 6261 and a second sound-regulating orifice 6262. The first sound-regulating orifice 6261 can be located further from the sound outlet orifice (e.g., the sound outlet orifice 621) than the second sound-regulating orifice 6262. In some embodiments, the effective area of ​​the outlet end of the first sound-regulating orifice 6261 can be larger than the effective area of ​​the outlet end of the second sound-regulating orifice 6262 to facilitate the destruction of the high-pressure region in the second chamber 624.In this way, both the size of the housing 620 and the requirement that the sound regulating orifice 626 disrupt the high-pressure area of ​​the second chamber 624 can be taken into account; and it can be made possible for the resonance frequency of the air duct sound waves at the sound outlet orifice (e.g., the sound outlet orifice 621) to be as high as possible; furthermore, it can be made possible for the first sound regulating orifice 6261 to be located as far away as possible from the sound outlet orifice (e.g., the sound outlet orifice 621) with a relatively high degree of disruption. For illustrative purposes only, some embodiments provide for the sound outlet orifice (e.g., the sound outlet orifice 626) to be locatedthe sound outlet opening 621) and the first sound regulating opening 6261 can be located on two opposite sides of the acoustic bone conduction assembly 610, wherein the second sound regulating opening 6262 can be located between the sound outlet opening (e.g. the sound outlet opening 621) and the first sound regulating opening 6261.

[0153] In some embodiments, the outlet end of at least part of the sound-regulating openings (e.g., the sound-regulating openings 626) can be covered with a sound-absorbing mesh to facilitate adjustment of the effective area of ​​the outlet end of the sound-regulating opening (e.g., the sound-regulating opening 626). For illustrative purposes, this embodiment uses an example in which the outlet ends of the sound-regulating openings (e.g., the sound-regulating openings 626) are each covered by a sound-absorbing mesh with the same acoustic resistance. Based on this, the corresponding effective area can be obtained by adjusting the actual area of ​​the outlet end of the sound-regulating opening (e.g., the sound-regulating opening 626).For example, in some embodiments, the actual area of ​​the outlet end of the first sound-regulating opening 6261 may be larger than the actual area of ​​the outlet end of the second sound-regulating opening 6262. Specifically, the actual area of ​​the outlet end of the first sound-regulating opening 6261 may be greater than or equal to 3.8 mm. 2 be; and / or the actual area of ​​the outlet end of the second sound regulation opening 6262 may be greater than or equal to 2.8 mm 2 be.

[0154] In some embodiments, in conjunction with Fig. 16C and Fig. In 16D, the first pressure relief opening 6221 and the first sound regulation opening 6261 can be arranged adjacently, and the second pressure relief opening 6222 and the second sound regulation opening 6262 can also be arranged adjacently. This allows the air-conducted sound waves emitted to the surroundings of the acoustic output device via the first pressure relief opening 6221 and the first sound regulation opening 6261, respectively, to interfere destructively, and the air-conducted sound waves emitted to the surroundings of the acoustic output device 600 via the second pressure relief opening 6222 and the second sound regulation opening 6262, respectively, can also interfere destructively.

[0155] In some embodiments, the effective area of ​​the outlet end of the first pressure relief opening 6221 can be larger than the effective area of ​​the outlet end of the first sound regulating opening 6261, so that the peak resonance frequency of the air conduction sound waves emitted to the environment of the acoustic output device via the first pressure relief opening 6221 is shifted as far as possible towards higher frequencies in order to approximate the peak resonance frequency of the air conduction sound waves emitted to the environment of the acoustic output device via the first sound regulating opening 6261 as possible, which in turn enables the air conduction sound waves emitted to the environment of the acoustic output device via the first pressure relief opening 6221 and the first sound regulating opening 6261, respectively, to interfere more effectively in a destructive manner.Similarly, the effective area of ​​the outlet end of the second pressure relief orifice 6222 may be larger than the effective area of ​​the outlet end of the second sound regulation orifice 6262, which is not repeated here.

[0156] In some embodiments, similar to the case where the sound regulating orifice (e.g., the sound regulating orifice 626) destroys the high-pressure area in the second chamber (e.g., the second chamber 624), the second pressure relief orifice 6222 and the third pressure relief orifice 6223 destroy the high-pressure area in the first chamber (e.g., the first chamber 623), so that the wavelength of the standing wave in the first chamber (e.g., the first chamber 623) is reduced, which in turn allows the peak resonance frequency of the air conduction sound waves emitted to the surroundings of the acoustic output device via the first pressure relief orifice 6221 to shift to higher frequencies in order to interfere more destructively with the air conduction sound waves emitted to the surroundings of the acoustic output device via the first sound regulating orifice 6261.The aforementioned displacement can be greater than or equal to 500 Hz, with the peak resonance frequency of the resonance peak being greater than or equal to 2 kHz. Preferably, the aforementioned displacement can be greater than or equal to 1 kHz. Similarly, the peak resonance frequency of the air-conducted sound waves emitted to the surroundings of the acoustic output device via the second pressure relief opening 6222 can also shift towards higher frequencies. In short, the frequency response curve of the air-conducted sound waves emitted to the surroundings of the acoustic output device 600 via the pressure relief opening 6222, which is located adjacent to the sound control opening (e.g., the sound control opening 626), exhibits a resonance peak, with a peak resonance frequency of the resonance peak occurring when further pressure relief openings (e.g.,Pressure relief openings 622, which are different from the pressure relief opening (e.g., pressure relief opening 622) located adjacent to the sound control opening (e.g., sound control opening 626), are shifted to higher frequencies compared to the peak resonance frequency of the resonance peak when these additional pressure relief openings 622 are closed. The peak resonance frequency of the resonance peak when the additional pressure relief openings (e.g., pressure relief openings 622) are open can be greater than or equal to 2 kHz. It should be noted that the open state of the pressure relief opening 622 here may indicate a situation in which the housing 620 is equipped with a pressure relief opening and the pressure relief opening is functioning normally.Accordingly, the closed state of the pressure relief opening 622 may indicate a situation in which the housing 620 is not provided with a pressure relief opening or the housing 620 is provided with a pressure relief opening, but it is closed and cannot function normally.

[0157] It should be noted that in the present application, the number, size, shape, and / or position of the one or more additional acoustic structures described above (such as sound outlet openings, sound conduction channels, pressure relief openings, sound regulating openings, etc.) are not limited. In some embodiments, the number, size, shape, and / or position of the one or more additional acoustic structures can be optimized depending on the sound loss of the acoustic output device. In some embodiments, the optimization method can be based on the frequency response curve of the acoustic output device provided in this description.Furthermore, the spatial arrangement of the acoustic bone conduction assembly and the acoustic air conduction assembly, and / or one or more components from the acoustic bone conduction assembly and the acoustic air conduction assembly, is not restricted in this description. For example, the spatial arrangement of the acoustic bone conduction assembly and the acoustic air conduction assembly may vary depending on the actual requirements. As an example, the position of the diaphragm in the acoustic air conduction assembly within the housing, the orientation of the diaphragm (e.g., the direction of the front of the housing), etc., may vary depending on the actual requirements and are not limited here.

[0158] Fig. Figure 17 shows a schematic structural view of a cross-section of an acoustic output device according to some embodiments of the present application. Fig. Figure 18A shows a schematic structural view of an acoustic output device according to some embodiments of the present application. Fig. Figure 18B shows a schematic structural view of an acoustic output device according to some embodiments of the present application. In conjunction with Fig. 17, Fig. 18A and Fig. In 18B, the acoustic bone conduction assembly in the acoustic output device can comprise a coil carrier 1510, a magnetic circuit assembly 1520, a coil assembly, and an elastic element 1540. In some embodiments, the elastic element 1540 can comprise one or more spring plates, springs, rubber plates, silicone plates, etc. The central regions of the coil carrier 1510 and the elastic element 1540 can be physically connected to the magnetic circuit assembly 1520 to suspend the magnetic circuit assembly 1520 in the housing 1601. In some embodiments, the acoustic output device can include a diaphragm 1503, wherein the diaphragm 1503 is physically connected to the housing 1601 and / or the magnetic circuit assembly 1520 and divides the interior of the housing 1601 into a first chamber 1610 and a second chamber 1620.In some embodiments, the coil assembly can be connected to the coil carrier 1510, wherein the magnetic circuit arrangement 1520 can form a magnetic gap 1550, and wherein the coil assembly 1530 can be arranged in the first chamber 1610 and can project into the magnetic gap 1550. In some embodiments, a communication opening 1606 can be provided in the coil assembly, through which the interior and exterior of the coil assembly communicate. In some embodiments, the coil assembly can comprise a coil 1530 and a coil carrier 1510, wherein the coil carrier 1510 is used to connect the coil 1530 to the housing 1601 and to allow the coil 1530 to project into the magnetic gap 1550, and wherein the communication opening 1606 can be provided in the coil carrier 1510.

[0159] In some embodiments, the magnetic circuit arrangement 1520 can comprise a magnetically conductive body (e.g., a magnetically conductive cover 1521) and a magnet 1522, which interact to form a magnetic field. The magnetically conductive cover 1521 can comprise a base plate 1523 and a side plate 1524. The base plate 1523 and the side plate 1524 can form a single, integrally joined structure. In some embodiments, the magnet 1522 can be arranged inside the side plate 1524 and attached to the base plate 1523, wherein a side of the magnet 1522 facing away from the base plate 1523 can be connected to a central region of the elastic element 1540 by a connecting element 1525, and wherein the coil 1530 is allowed to project into the magnetic gap 1550 between the magnet 1522 and the magnetically conductive cover 1521.It should be noted that the magnet 1522 can be a group of magnets consisting of several smaller magnets. Furthermore, a magnetically conductive plate (not marked in the figure) can be provided on the side of the magnet 1522 facing away from the base plate 1523.

[0160] In some embodiments, a circumferential region of the elastic element 1540 is connected to the housing 1601, whereby the magnetic circuit arrangement 1520 is suspended in the housing 1601, with the communication opening 1606 being located on a side of the spring plate 1540 facing away from the skin contact area.

[0161] In some embodiments, the coil carrier 1510 can comprise a main body 1511 and a first carrier section 1512, wherein one end of the first carrier section 1512 is connected to the main body 1511, wherein the coil 1530 is connected to the other end of the first carrier section 1512, the end facing away from the main body 1511, and wherein the communication opening 1606 can be located at a connection point between the main body 1511 and the first carrier section 1512. In some embodiments, the main body 1511 can be connected to the circumferential region of the spring plate 1540, wherein the main body 1511 and the spring plate 1540 can form a single-piece structure, for example, a single-piece structural part formed by an injection molding process based on metal inserts.

[0162] In some embodiments, the coil support 1510 may further comprise a second support section 1513 connected to the main body 1511, wherein the second support section 1513 surrounds the first support section 1512 and extends in the same direction as the first support section 1512 towards the side of the main body 1511. The second support section 1513 and the main body 1511 may be connected together with the housing 1601 to increase the connection strength between the coil support 1510 and the housing 1601. It should be noted that the first support section 1512 and / or the second support section 1513 may form a continuous, complete structure in the circumferential direction of the coil support 1510 to increase the structural strength of the coil support 1510, or they may form a partially discontinuous structure to avoid other structural components.

[0163] Based on the descriptions above and with reference to Fig. 18A, as it vibrates, causes the air in the first chamber 1610 to vibrate, resulting in a change in pressure within the first chamber 1610. This causes the air in the first chamber 1610 to be expelled through the pressure relief port 1604. The expulsion of the air from the first chamber 1610 requires bypassing the coil assembly, and its path can be traced as shown by the dashed arrow in Fig. Figure 18A shows this. This results in a relatively long wavelength of the standing wave in the first chamber 1610, which is detrimental because the peak resonance frequency of the air-conducting sound waves emitted to the surroundings of the acoustic output device via the pressure relief opening 1604 shifts to higher frequencies. In some embodiments, the communication opening 1606 provided in the coil assembly can allow the air in the first chamber 1610 to flow directly through the coil assembly during the discharge process. In conjunction with Fig. 18B, the efficiency of the venting of the first chamber 1610 can be increased by providing the communication opening 1606 in the coil assembly. In some embodiments, the wavelength of the standing wave in the first chamber 1610 can also be reduced by providing the communication opening 1606 on the coil assembly, which in turn allows the peak resonance frequency of the air-conducting sound waves, which are emitted to the environment of the acoustic output device via the pressure relief opening 1604, to shift towards higher frequencies.

[0164] Fig. Figure 19 shows a schematic comparison diagram of the frequency response curves of air-conducted sound waves at a pressure relief opening before and after the provision of a communication opening at an acoustic output device according to some embodiments of the present application. As in Fig. Figure 19 shows that the dashed line represents the frequency response curve of the air-conducting sound waves at the pressure relief opening when no communication opening (e.g., communication opening 1606) is provided. The solid line represents the frequency response curve of the air-conducting sound waves at the pressure relief opening (e.g., communication opening 1606) when a communication opening is provided. In conjunction with Fig. 19, Fig. 18A and Fig. 18B The frequency response curve of the air-conducted sound waves emitted to the environment of the acoustic output device via the pressure relief port 1604, which communicates with the first chamber 1610 on the housing 1601, can exhibit a resonance peak, wherein a peak resonance frequency of the resonance peak in an open state of the communication port 1606 (i.e., the one in Fig. 19 (curve represented by the solid line) compared to a peak resonance frequency of the resonance peak in a closed state of the communication port 1215 (i.e., the one in Fig. 19 (curve shown by the dashed line) is shifted towards higher frequencies, and the magnitude of the shift can be greater than or equal to 500 Hz. In some embodiments, the peak resonance frequency of the resonance peak in the open state of the communication port 1606 can be greater than or equal to 2 kHz. It should be noted that the open state of the communication port 1215 here may indicate a situation in which the acoustic output device is provided with a communication port and the communication port functions normally. Accordingly, the closed state of the communication port 1215 may indicate a situation in which no communication port is provided on the acoustic output device or in which a communication port 1215 is provided on the acoustic output device, but it is closed and cannot function normally.

[0165] In some embodiments, in conjunction with Fig. 17, Fig. 18A and Fig. In Figure 18B, the coil assembly is arranged in the first chamber 1610 and projects into the magnetic gap 1550 of the magnetic circuit arrangement 1520. The coil assembly can be annular and provided with a communication opening 1606 through which the interior and exterior of the coil assembly communicate, thus shortening the path for air removal from the first chamber 1610. Preferably, the communication opening 1606 can be located in a part of the coil assembly that lies outside the magnetic gap 1550 of the magnetic circuit arrangement 1520.

[0166] In some embodiments, in conjunction with Fig. 17, Fig. 18A and Fig. In Figure 18B, the coil assembly can comprise a coil carrier 1510 and a coil 1530 connected to the coil carrier 1510, wherein the coil carrier 1510 is used to attach the coil 1530 to the housing 1610 and to allow the coil 1530 to project into the magnetic gap 1550 of the magnetic circuit system 1520. The communication opening 1606 can be provided in the coil carrier 1510. Furthermore, the communication opening 1606 can be located on a side of the elastic element 1540 facing away from the skin contact area in order to shorten the path for the removal of air from the first chamber 1610.

[0167] With reference to Fig. 17 In some embodiments, the communication opening can also be located at a connection point between the first support section 1511 and the second support section 1512. In this embodiment, one or more communication openings can be provided, which can be spaced apart in the circumferential direction of the coil assembly. In some embodiments, the cross-sectional area of ​​each communication opening 1606 can be greater than or equal to 2 mm². 2 For illustrative purposes only, the cross-sectional area of ​​a communication opening closest to the first pressure relief opening can be greater than or equal to 3 mm². 2be, wherein the cross-sectional areas of two communication openings, one of which is the communication opening closest to the second pressure relief opening and the other the communication opening closest to the third pressure relief opening, are each greater than or equal to 2.5 mm 2 They can be.

[0168] With reference to Fig. 17 In some embodiments, part of the diaphragm 1503 can be connected to the magnetic circuit system 1520, while another part of it can be connected to the other end of the second support section 1513, the end facing away from the main body 1511, and thus to the housing 1601. In some embodiments, the diaphragm 1503 can comprise a diaphragm body 15031 and a reinforcing ring 15035. Fig. Figure 20A shows a top view of the structure of membrane 1503. Fig. 17 according to some embodiments of the present application. In conjunction with Fig. 17 and Fig. In 20A, the membrane body 15031 can comprise a first connecting section 15032, a folded section 15033, and a second connecting section 15034, which are integrally connected. The first connecting section 15032 can surround the acoustic bone conduction assembly and be connected to it. The second connecting section 15034 can be arranged surrounding the outer circumference of the first connecting section 15032 and spaced apart from it in a direction perpendicular to the vibration direction of the acoustic bone conduction assembly. The folded section 15033 is located at a distance between the first connecting section 15032 and the second connecting section 15034 and connects the first connecting section 15032 to the second connecting section 15034.In some embodiments, the reinforcing ring 15035 can be connected to the second connecting section 15034, so that the second connecting section 15034 is connected to the housing 1610 via the reinforcing ring 15035 in order to increase the structural strength of the edge of the membrane 1503, thereby in turn increasing the connection strength between the membrane 1503 and the housing 1601.

[0169] In some embodiments, the acoustic output device may include a communication channel 1560 through which the first chamber 1610 and the second chamber 1620 communicate, wherein the communication channel 1560 can disrupt the high-pressure area in the first chamber 1610 and the second chamber 1620, increase the peak resonance frequency of the resonance peak and thereby improve the sound quality and reduce the sound loss of the acoustic output device.

[0170] With reference to Fig. In 20A, the communication channel 1560 can comprise an array of openings 15036 provided in the membrane 1503. For example, the array of openings 15036 can be located at the folded section 15033. In some embodiments, at least some of the openings in the array of openings 15036 and the sound outlet opening 1602 can be located on two opposite sides of the acoustic bone conduction assembly. In another alternative embodiment, the array of openings 15036 can also be located on two sides of the sound outlet opening 1602. In some embodiments, the actual area of ​​each opening in the array of openings 15036 can range from 0.01 mm². 2 and 0.04 mm 2 lay.

[0171] In some embodiments, the array of openings 15036 can further interact with the sound regulating opening 1605, so that the air conduction sound waves emitted to the environment of the acoustic output device via the sound outlet opening 1602 are shifted towards higher frequencies.

[0172] Fig. Figure 20B shows a schematic structural view of an acoustic output device according to some embodiments of the present application. In some embodiments, the communication channel may also include a through-hole 1560 provided on the magnetic circuit arrangement 1520 of the acoustic bone conduction assembly, wherein the through-hole 1560 may extend through the magnetic circuit system 1520 (e.g., through a bottom wall of the magnetically conductive cover 1521) so that the first chamber 1610 and the second chamber 1620 of the acoustic output device are in communication with each other. In some embodiments, the actual area of ​​the through-hole 1560 may be less than or equal to 9 mm². 2 In some embodiments, the actual area of ​​the through-opening 1560 may be less than or equal to 7 mm. 2In some embodiments, the actual area of ​​the through-opening 1560 may be less than or equal to 5 mm. 2 be.

[0173] Fig. Figure 20C shows a schematic structural view of an acoustic output device according to some embodiments of the present application. The structure of the device shown in Fig. The acoustic output device shown in 20C is essentially similar in structure to the one shown in Fig. The acoustic output device shown in Figure 20B. The difference between the two is that, in some embodiments, the communication channel can be a communication tube 1580 provided outside the housing 1601, wherein the communication tube 1580 can connect the pressure relief port 1604, which communicates with the first chamber 1610, and the sound control port 1605, which communicates with the second chamber 1620, so that the first chamber 1610 and the second chamber 1620 communicate with each other. In some embodiments, the communication tube 1580 can be a tubular structure, wherein two ends of the tubular structure communicate with the pressure relief port 1604 and the sound control port 1605, respectively.In some embodiments, the communication tube 1580 can also be a further three-dimensional structure, which is formed independently of the housing 1601 or integrally with the housing 1601, wherein a cavity is provided within this three-dimensional structure, the cavity being in communication with the pressure relief opening 1604 and the sound regulation opening 1605, thereby realizing communication between the first chamber 1610 and the second chamber 1620. In some embodiments, at least one sound-absorbing mesh 1590 is further provided inside the communication tube 1580, wherein the sound-absorbing mesh 1590 can be located on a side wall of the housing 1601 on which the pressure relief opening 1603 and the sound regulation opening 1605 are simultaneously provided, or on the pressure relief opening 1603 and the sound regulation opening 1605. The principle of the communication channel of the in . Fig. 20B and Fig. The acoustic output devices shown in 20C are approximately the same as the principle of the communication channel in Fig. 20A, which is not repeated here. It should also be noted that the shape and position of the communication tube 1580 are not limited to being located on one side of the housing 1601 (as in Fig. 20C shown), but can be adaptively adjusted depending on the positions of the pressure relief opening 1604 and the sound regulation opening 1605.

[0174] The frequency response of the air-conducted sound waves emitted to the surroundings of the acoustic output device via the sound outlet may exhibit a resonance peak, the peak resonance frequency of which may be greater than or equal to 2 kHz. In some embodiments, the peak resonance frequency of the resonance peak shifts to higher frequencies when the communication channel is open compared to the peak resonance frequency of the resonance peak when the communication channel is closed, with a shift magnitude greater than or equal to 500 Hz. Preferably, the shift magnitude may be greater than or equal to 1 kHz. In some embodiments, the sound loss of the acoustic output device in the low to mid-frequency band also gradually decreases with the shift of the peak resonance frequency to higher frequencies. For example, Fig. 21 a schematic diagram of the frequency response curves of air-conducted sound waves at a sound-guiding component according to some embodiments of the present application. Fig. Figure 22 shows a schematic diagram of the frequency response curves of airborne sound waves at a sound-guiding component according to some further embodiments of the present application. As in Fig. As shown in Figure 21, frequency response curve 21-1 represents a frequency response curve for a sound-guiding component of an acoustic output device in which no communication channel or sound control opening is provided. Frequency response curve 21-2 represents a frequency response curve for a sound-guiding component of an acoustic output device in which a communication channel is provided, but no sound control opening is provided. Frequency response curve 21-3 represents a frequency response curve for a sound-guiding component of an acoustic output device in which a communication channel and a sound control opening are provided. As shown in Fig. Figure 22 shows that frequency response curve 22-1 represents a frequency response curve for a sound-guiding component of an acoustic output device in which no communication channel or sound control opening is provided. Frequency response curve 22-2 represents a frequency response curve for a sound-guiding component of an acoustic output device in which a communication channel is provided, but no sound control opening is provided. Frequency response curve 22-3 represents a frequency response curve for a sound-guiding component of an acoustic output device in which a communication channel and a sound control opening are provided.

[0175] With reference to Fig. 21 and Fig. 22 The frequency response curve of the air-conducted sound waves emitted to the surroundings of the acoustic output device via the sound outlet opening can exhibit a resonance peak, wherein the peak resonance frequency of the resonance peak can be greater than or equal to 2 kHz. In some embodiments, the peak resonance frequency of the resonance peak shifts towards higher frequencies in the open state of the communication channel (e.g., frequency response curve 21-2, frequency response curve 21-3) compared to the peak resonance frequency of the resonance peak in the closed state of the communication channel (e.g., frequency response curve 21-1), wherein the magnitude of the shift can be greater than or equal to 500 Hz. Preferably, the magnitude of the shift can be greater than or equal to 1 kHz.In some embodiments, as the peak resonance frequency of the resonance peak shifts towards higher frequencies, the sound loss of the acoustic output device in the low to mid-frequency band also gradually decreases. It should be noted that the open state of the communication channel here may indicate a situation in which the acoustic output device is equipped with a communication channel and the communication channel is functioning normally. Conversely, the closed state of the communication channel may indicate a situation in which the acoustic output device does not have a communication channel, or in which a communication channel is provided but is closed and cannot function normally.

[0176] With reference to Fig. In some embodiments, 20B may provide a sound-absorbing network 1570 on a communication path defined by the communication channel 1560. In conjunction with Fig. 20B and Fig. 23 By providing the sound-absorbing network 1570 on the communication path defined by the communication channel 1560, the high-frequency peaks of the air-conducted sound waves, which are emitted to the surroundings of the acoustic output device via the sound outlet opening 1602 and the sound conduction channel, can be further attenuated, so that the frequency response curve becomes flatter and the sound quality at high frequencies becomes more balanced. For example, Fig. 23 A schematic diagram of the frequency response curves of airborne sound waves at a sound-guiding component according to some further embodiments of the present application. As in Fig. Figure 23 shows that frequency response curve 23-1 represents a frequency response curve for a sound-guiding component of an acoustic output device in which no communication channel is provided. Frequency response curve 23-2 represents a frequency response curve for a sound-guiding component of an acoustic output device in which a communication channel is provided and the communication channel is covered with a sound-absorbing mesh. Frequency response curve 23-3 represents a frequency response curve for a sound-guiding component of an acoustic output device in which a communication channel is provided and the communication channel is covered with a sound-absorbing mesh whose acoustic resistance is 45 MKS Rayl and whose porosity is 18%.Frequency response curve 23-4 represents a frequency response curve for a sound-guiding component of an acoustic output device, in which a communication channel is provided and the communication channel is covered with a sound-absorbing mesh whose acoustic resistance is 260 MKS Rayl and whose porosity is 13%. The frequency response curve corresponding to frequency response curve 23-4 is flatter than the frequency response curve corresponding to frequency response curve 23-3. In some embodiments, the sound-absorbing mesh provided on the communication path defined by the communication channel can have a porosity of less than or equal to 18% and / or a pore size of less than or equal to 51 µm.

[0177] To further describe the effects of the sound conduction channel, the pressure relief opening, and the sound regulation channel in the acoustic output device, an exemplary illustration is provided solely based on the [reference to be added]. Fig. 24 scenarios shown, in which a user wears the acoustic output device. Fig. Figure 24 shows a schematic view of various positions relative to an acoustic output device according to some embodiments of the present application. With reference to Fig. 24. Points P1, P2, P3, and P4 can represent four positions relative to the acoustic output device. When the user is wearing the acoustic output device, P1 is located at a position close to the user's skin, which can also be referred to as the front of the acoustic output device; P3 is located at a position away from the user's skin, which can also be referred to as the back of the acoustic output device; P2 is located at a position near the aforementioned sound conduction channel; and P4 is located at a position near the aforementioned pressure relief opening.

[0178] Fig. 25, Fig. 26, Fig. 27, Fig. 28 to Fig. Figures 29 each show a schematic view of leakage frequency response curves of an acoustic output device at different positions. Fig. 24 according to some embodiments of the present application. A leakage frequency response curve of the acoustic output device can be a curve that represents the change in sound loss of the acoustic output device as well as the frequency of a sound signal. The horizontal axis can represent the frequency of a sound signal input to the acoustic output device. The vertical axis can represent the volume of sound loss of the acoustic output device at a position (e.g., P1, P2, P3, P4). The leakage frequency response curves L1 to L4, as in Fig. 25, Fig. 26, Fig. 27, Fig. 28 to Fig. Figures 29 show the change in sound loss of the acoustic output device at positions P1 to P4. Fig. 24 depending on the frequency of the sound signal.

[0179] As in Fig. Figure 25 shows leakage frequency response curves of a first acoustic output device comprising a sound conduction channel and a pressure relief opening at positions P1-P4 in Fig. 24 each represented by L1 to L4, wherein a sound conduction channel and a pressure relief opening are provided on two opposite side walls of the housing of the acoustic output device. The first acoustic output device may be identical or similar to the acoustic output device 600 from Fig. 6.

[0180] As in Fig. Figure 26 shows leakage frequency response curves of a second acoustic output device comprising a sound conduction channel and a pressure relief opening at positions P1-P4 in Fig. 24, each represented by L1 to L4, wherein a sound conduction channel and a pressure relief opening are provided on two opposite side walls of the housing of the acoustic output device. The second acoustic output device further comprises at least one pressure regulating opening, wherein the pressure regulating opening is provided on a side wall on which the pressure relief opening is located. The second acoustic output device may be identical or similar to the acoustic output device 600 from Fig. 6.

[0181] As in Fig. Figure 27 shows leakage frequency response curves of a third acoustic output device comprising a sound conduction channel and a pressure relief opening at positions P1-P4 in Fig. 24 each represented by L1 to L4, wherein a sound conduction channel and a pressure relief opening are provided on two opposite side walls of the housing of the acoustic output device. The third acoustic output device further comprises at least one sound regulating opening, wherein the sound regulating opening is provided on a side wall on which the pressure relief opening is located. The third acoustic output device may be identical or similar to the acoustic output device 600 from Fig. 6. In contrast to the second acoustic output device, the volume of the second chamber of the third acoustic output device is smaller than that of the second chamber of the second acoustic output device.

[0182] As in Fig. Figure 28 shows leakage frequency response curves of a fourth acoustic output device comprising a sound conduction channel and a pressure relief orifice at positions P1-P4 in Fig. 24 each represented by L1 to L4, wherein a sound conduction channel and a pressure relief opening are provided on two opposite side walls of the housing of the acoustic output device. The fourth acoustic output device further comprises at least one sound regulating opening, wherein the sound regulating opening is provided on a side wall on which the pressure relief opening is located. The fourth acoustic output device may be identical or similar to the acoustic output device 600 from Fig. 6. In contrast to the second acoustic output device, the sound conduction channel and the pressure relief opening can communicate via the sound regulation opening. This can also be understood to mean that the pressure relief opening and the sound regulation opening are not through-openings.

[0183] As in Fig. Figure 29 shows leakage frequency response curves of a fifth acoustic output device comprising a sound conduction channel and a pressure relief orifice at positions P1-P4 in Fig. 24 each represented by L1 to L4, wherein a sound conduction channel and a first pressure relief opening are provided on two opposite side walls of the housing of the acoustic output device. The fourth acoustic output device further comprises at least one sound regulating opening, wherein the sound regulating opening is provided on a side wall on which the first pressure relief opening is located. The fourth acoustic output device may be identical or similar to the acoustic output device 600 from Fig. 6. The sound conduction duct and the first pressure relief opening communicate with each other via the sound regulating opening. This can also be understood to mean that the first pressure relief opening and the sound regulating opening are not through-openings. In contrast to the fourth acoustic output device, the fifth acoustic output device further comprises a second pressure relief opening, the second pressure relief opening being provided on a side wall where the first pressure relief opening is located. The second pressure relief opening is a through-opening.

[0184] Fig. 30, Fig. 31, Fig. 32 to Fig. Figure 33 each shows a schematic view of leakage frequency response curves of different acoustic output devices at the same position. Fig. 24 according to some embodiments of the present application. The leakage frequency response curves S1 to S5, as in Fig. 30, Fig. 31, Fig. 32 to Fig. Figure 33 shows the change in sound loss of various acoustic output devices at each position from P1 to P4. Fig. 24 depending on the frequency of a sound signal. As in Fig. Figure 30 shows the leakage frequency response curves of the first acoustic output device, the second acoustic output device, the third acoustic output device, the fourth acoustic output device, and the fifth acoustic output device. Fig. 25, Fig. 26, Fig. 27, Fig. 28 to Fig. 29 at position P1, each represented by S1 to S5. As in Fig. Figure 31 shows the leakage frequency response curves of the first acoustic output device, the second acoustic output device, the third acoustic output device, the fourth acoustic output device, and the fifth acoustic output device. Fig. 25, Fig. 26, Fig. 27, Fig. 28 to Fig. 29 at position P2, each represented by S1 to S5. As in Fig. Figure 32 shows the leakage frequency response curves of the first acoustic output device, the second acoustic output device, the third acoustic output device, the fourth acoustic output device, and the fifth acoustic output device. Fig. 25, Fig. 26, Fig. 27, Fig. 28 to Fig. 29 at position P3, each represented by S1 to S5. As in Fig. Figure 33 shows the leakage frequency response curves of the first acoustic output device, the second acoustic output device, the third acoustic output device, the fourth acoustic output device, and the fifth acoustic output device. Fig. 25, Fig. 26, Fig. 27, Fig. 28 to Fig. 29 at position P4 are represented by S1 to S5.

[0185] With reference to Fig. 25 comprise the leakage frequency response curves L1 to L4 of the first acoustic output device, which does not include a sound-regulating orifice, at the various positions P1 to P4, in particular the leakage frequency response curve L1 corresponding to the front position P1 and the leakage frequency response curve L3 corresponding to the rear position P3, each with a first peak at a frequency of approximately 2000 Hz and a second peak at a frequency of approximately 2200 Hz. The first peak at a frequency of approximately 2000 Hz may be caused by the first chamber of the first acoustic output device, and the second peak at a frequency of approximately 2200 Hz may be caused by the second chamber of the first acoustic output device. With reference to Fig. 26. The leakage frequency response curves L1 to L4 of the second acoustic output device, which includes a sound-regulating orifice, at the various positions P1 to P4, in particular the leakage frequency response curve L1 corresponding to the front position P1 and the leakage frequency response curve L3 corresponding to the rear position P3, each with a first peak at a frequency of approximately 2000 Hz and a second peak at a frequency of approximately 4800 Hz, are included. By comparing the leakage frequency response curves L1 to L4 of the first acoustic output device with those of the second acoustic output device, it can be deduced that the sound-regulating orifice can cause the second peak caused by the second chamber to shift to a higher frequency. Therefore, the sound-regulating orifice can increase the resonance frequency in the air in the second chamber (i.e., the frequency corresponding to the peak value of the leakage frequency response curves L1-L4). As in Fig. 30, Fig. 31, Fig. 32 to Fig. As shown in 33, by comparing the leakage frequency response curve S1 of the first acoustic output device with the leakage frequency response curve S2 of each of the second acoustic output devices, it can be determined from Fig. 30, Fig. 31, Fig. 32 to Fig. 33 The sound loss of the second acoustic output device at position P2 (i.e., a position around the sound conduction channel) can be considered as the sound loss of the sound regulating opening, but the sound loss of the second acoustic output device at other positions (e.g., P1, P3 and P4) does not change significantly.

[0186] With reference to Fig. 27 The leakage frequency response curves L1 to L4 of the third acoustic output device at the various positions P1 to P4 comprise a first peak and a second peak, wherein the volume of the second chamber of the third acoustic output device is smaller than the volume of the second chamber of the second acoustic output device. By comparing the leakage frequency response curves L1 to L4 of the second acoustic output device with those of the third acoustic output device, it can be deduced that the second peak, which is formed by the second chamber in Fig. 26 is caused, compared to the one in Fig. The smaller volume of the second chamber shown in 27 shifts to a higher frequency. As in Fig. 30, Fig. 31, Fig. 32 to Fig. As shown in Figure 33, by comparing the leakage frequency response curve S2 of the second acoustic output device with the leakage frequency response curve S3 of the third acoustic output device at each of the positions P1, P2, P3 and P4, it can be determined that the sound loss of the third acoustic output device at each of the positions P1, P2, P3 and P4 does not change depending on the volume of the second chamber.

[0187] As in Fig. As shown in Figure 28, the leakage frequency response curves L1 to L4 of the fourth acoustic output device, which includes a sound conduction channel, a pressure relief orifice, and a sound regulation orifice, can exhibit a first peak at a frequency of approximately 700 Hz and a second peak at a frequency above 1000 Hz. By comparing the leakage frequency response curves L1 to L4 of the fourth acoustic output device with those of the fifth acoustic output device, it can be deduced that the first peak is located at Fig. 28 shifts to a lower frequency, which is attributed to an increase in chamber volume due to communication between the first and second chambers. As in Fig. 30, Fig. 31, Fig. 32 to Fig. As shown in Figure 33, by comparing the leakage frequency response curve S4 of the fourth acoustic output device with those of the leakage frequency response curve S5 of the fifth acoustic output device, it can be determined that the sound loss of the fourth acoustic output device decreases significantly at positions P2 and P4 (i.e., at positions of the sound conduction channel and the pressure relief opening), especially at low and medium frequencies.

[0188] With reference to Fig. 29 The leakage frequency response curves L1 to L4 of the fifth acoustic output device, which comprises a sound conduction channel, a first pressure relief orifice, a second pressure relief orifice, and an associated pressure regulating orifice, can include a first peak and a second peak. By comparing the leakage frequency response curves L1 to L4 of the second acoustic output device with those of the fifth acoustic output device, it can be deduced that the second peak is located in Fig. 29 shifts to a higher frequency. As in Fig. 30, Fig. 31, Fig. 32 to Fig.As shown in Figure 33, by comparing the leakage frequency response curve S2 of the second acoustic output device with the leakage frequency response curve S5 of the fifth acoustic output device, it can be determined that, compared to the second acoustic output device, the sound loss of the fifth acoustic output device at position P2 (i.e. around the sound conduction channel) is not significantly changed, but decreases significantly at position P4 (i.e. around the second pressure relief opening).

[0189] The basic concept has been described above. It is obvious to the person skilled in the art that the detailed disclosure above is merely an example and does not constitute a limitation of the present application. Although not explicitly stated, a person skilled in the art may make various modifications, improvements, and changes to the application. These modifications, improvements, and changes are indicated in the application so that they are still within the spirit and scope of the exemplary embodiments of the application.

[0190] The present application also uses specific terms to describe embodiments of the present application. The terms "an embodiment" and / or "some embodiments" refer to a feature, structure, or special characteristic associated with at least one embodiment of the present application. It should therefore be emphasized and noted that the terms "an embodiment" or "an alternative embodiment," which have been mentioned two or more times in different places in the present description, do not necessarily refer to the same embodiment. Furthermore, some features, structures, or properties of one or more embodiments of the present application can be appropriately combined with one another.

[0191] Furthermore, a person skilled in the art in this field can understand that the aspects of the present application can be explained and described by several categories or situations, including any new and meaningful combinations of operations, machines, products, or substances, as well as any new and meaningful improvements thereto. Accordingly, the various aspects of the present application can be implemented entirely by hardware, entirely by software (including firmware, resident software, microcode, etc.), or by a combination of hardware and software. Both hardware and software can be referred to as a "data block," "module," "engine," "unit," "arrangement," or "system." Furthermore, the aspects of the present application can manifest themselves as a computer product on one or more computer-readable media, the product comprising computer-readable program code.

[0192] A computer-readable storage medium can comprise a disseminated data signal containing computer program code, for example, on a baseband or as part of a carrier wave. This disseminated signal can be in various forms, including electromagnetic, optical, or a suitable combination thereof. A computer-readable storage medium can be any medium that is not strictly a computer-readable storage medium and serves to achieve communication, dissemination, or transmission of a program to be provided by connecting it to an instruction execution system, associated device, or equipment. The program code on a computer-readable storage medium can be disseminated via any suitable medium, such as radio, cable, fiber optic cable, RF, or similar media, or a combination thereof.

[0193] Furthermore, unless expressly stated otherwise in the claims, neither the order of the processing elements and sequences nor the use of numbers, letters, or other designations in the present application shall be intended to restrict the order of the processes and methods of the present application. Although the above disclosure has discussed some embodiments of the invention currently considered useful by way of various examples, it should be understood that such details are for illustrative purposes only and that the attached claims are not limited to the disclosed embodiments. Rather, the claims are intended to cover all modifications and equivalent combinations that are consistent with the nature and scope of the embodiments of the present application.Although the system arrangements described above can be implemented using hardware devices, for example, they can also be implemented using software solutions, such as by installing the described systems on existing servers or mobile devices.

[0194] It should also be noted that in the preceding description of the embodiments of the present application, various features are sometimes grouped together in one embodiment, one figure, or its description(s) in order to simplify the description of the disclosure of the present application and to facilitate the understanding of one or more embodiments of the invention. However, this method of disclosure does not mean that the subject matter of the present application requires more features than those specified in the claims. In fact, the embodiments have fewer features than the totality of features of the individual embodiments disclosed above.

[0195] In some embodiments, numerical values ​​are used to describe the components and properties. It should be understood that in some cases, the numerical values ​​used to describe the embodiments are further specified by terms such as "approximately," "about," or "essentially." Unless otherwise stated, "approximately," "about," or "essentially" indicate that the stated number allows for a variation of ±20%. Accordingly, in some embodiments, the numerical parameters used in the description and claims are approximate values ​​that may vary depending on the requirements of the individual embodiment. In some embodiments, the required number of valid decimal places for the numerical parameters is to be taken into account using a general rounding procedure.Although the numerical ranges and parameters in some embodiments of the present application for determining the width of the associated perimeter are approximate values, such values ​​have been determined as precisely as possible within the practical scope in the specific embodiments.

[0196] Every patent specification, every patent application, every publication of patent applications, and every other material cited in the present application, such as articles, books, descriptions, publications, documents, etc., is hereby incorporated in its entirety into the present application as a reference. Excluded are application history documents that are inconsistent with or conflict with the content of the present application, as well as documents (currently or subsequently attached to the present application) that limit the broadest scope of the claims of the present application. It is hereby clarified that in the event of any discrepancies or conflicts between the description, definition, and / or use of terms in the application and those in accompanying materials, the description, definition, and / or use of terms in the present application shall prevail.

[0197] In conclusion, it should be understood that the embodiments described in this application serve only to illustrate the principle of the embodiments described therein. Other variants could also fall within the scope of this application. Therefore, alternative configurations of the embodiments described in this application may be considered exemplary and not as limiting, as being consistent with the teachings of this application. Accordingly, the embodiments described in this application are not limited to those expressly presented and described herein. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 2021103834522

[0001]

Claims

[1] Acoustic output device comprising: an acoustic bone conduction assembly for generating bone conduction sound waves; an acoustic air duct assembly for generating air duct sound waves; and A housing for receiving at least part of the acoustic bone conduction assembly and the acoustic air conduction assembly, wherein the housing comprises a first chamber and a second chamber, wherein the first chamber is used to receive at least part of the acoustic bone conduction assembly, wherein the housing is provided with a sound outlet opening which communicates with the second chamber, wherein the air conduction sound waves are transmitted through the sound outlet opening to the environment of the acoustic output device, wherein the housing is further provided with at least one sound regulating opening which communicates with the second chamber, and wherein a peak resonance frequency of the resonance peak in an open state of the at least one sound regulating opening is shifted towards higher frequencies compared to a peak resonance frequency of the resonance peak in a closed state of the at least one sound regulating opening. [2] Acoustic output device according to claim 1, characterized by , that the shift amount towards higher frequencies is greater than or equal to 500 Hz. [3] Acoustic output device according to claim 1, characterized by , that the shift amount towards higher frequencies is greater than or equal to 1kHz. [4] Acoustic output device according to any one of claims 1 to 3, characterized by, that the peak resonance frequency of the resonance peak in the open state of at least one sound regulation opening is greater than or equal to 2 kHz. [5] Acoustic output device according to any one of claims 1 to 4, characterized by that the sum of the effective areas of the outlet ends of all sound regulation openings is greater than or equal to 1.5 mm2. [6] Acoustic output device according to any one of claims 1 to 5, characterized by , that the core housing comprises a first side wall and a second side wall located on two opposite sides of the acoustic bone conduction assembly, wherein the at least one sound regulating orifice comprises a first sound regulating orifice, and wherein the sound outlet or the first sound regulating orifice is provided in the first side wall or the second side wall, respectively. [7] Acoustic output device according to claim 6, characterized by, that the housing further comprises a third side wall and a fourth side wall which connect the first side wall to the second side wall and are spaced apart from each other, wherein the at least one sound regulating opening further comprises a second sound regulating opening, and wherein the second sound regulating opening is provided in the third side wall or the fourth side wall. [8] Acoustic output device according to claim 7, characterized by , that the effective area of ​​an outlet end of the first sound regulation opening is larger than the effective area of ​​an outlet end of the second sound regulation opening. [9] Acoustic output device according to claim 7 or 8, characterized bythat the effective area of ​​an outlet end of the first sound-regulating opening is larger than the actual area of ​​an outlet end of the second sound-regulating opening; that the actual area of ​​the outlet end of the first sound-regulating opening is greater than or equal to 3.8 mm 2 is; and / or that the actual area of ​​the outlet end of the second sound regulation opening is greater than or equal to 2.8 mm² 2 is. [10] Acoustic output device according to claim 8 or 9, characterized by , that the outlet ends of the first sound regulation opening and the second sound regulation opening are each covered with a sound-absorbing mesh whose porosity is less than or equal to 16%. [11] Acoustic output device according to any one of claims 1 to 10, characterized by, that the housing is provided with at least one pressure relief opening which communicates with the first chamber, wherein at least part of the sound control openings is located adjacent to at least part of the at least one pressure relief opening, and wherein the distance between a sound control opening and a pressure relief opening which are located adjacent to each other is less than or equal to 2 mm. [12] Acoustic output device according to claim 11, characterized by , that for the pressure relief opening and the sound regulation opening, which are arranged adjacently, the effective area of ​​the outlet end of the pressure relief opening is larger than the effective area of ​​the outlet end of the sound regulation opening. [13] Acoustic output device according to claim 11 or 12, characterized by, that for the pressure relief opening and the sound regulation opening, which are arranged adjacently, the ratio of the effective area of ​​the outlet end of the pressure relief opening to the effective area of ​​the outlet end of the sound regulation opening is less than or equal to 2. [14] Acoustic output device according to any one of claims 1 to 10, characterized by , that it further comprises a sound-guiding component connected to the housing, wherein the sound-guiding component is provided with a sound-conducting channel which communicates with the sound outlet opening and is used to direct the air-conducting sound waves to the surroundings of the acoustic device; and that the housing is provided with sound-regulating openings which communicate with the second chamber, wherein the effective area of ​​the outlet end of the sound-conducting channel is larger than the effective area of ​​the outlet end of each of the sound-regulating openings. [15] Acoustic output device according to any one of claims 1 to 14, characterized by that the acoustic air conduction assembly comprises at least one membrane, wherein the at least one membrane may be connected to the acoustic bone conduction assembly or the housing, and wherein air conduction sound waves can be generated based on the vibration of the at least one membrane or the housing; and that the at least one membrane divides the chamber of the housing into the first chamber and the second chamber.

Images