ACOUSTIC OUTPUT DEVICE

Abstract

This disclosure provides an acoustic output device. The acoustic output device may include a bone conduction acoustic unit, an air-to-ear conduction acoustic unit, and a housing. The bone conduction acoustic unit may be configured to generate bone conduction sound waves. The air-to-ear conduction acoustic unit may be configured to generate air-to-ear conduction sound waves. The housing may include an enclosure configured to house the bone conduction acoustic unit and the air-to-ear conduction acoustic unit. At least a portion of the housing may be in contact with a user's skin to transmit bone conduction sound waves under the action of the bone conduction acoustic unit.Aerotympanic conduction sound waves can be generated based on the vibrations of at least one of the housing or bone conduction acoustic installation when bone conduction sound waves are generated.

Description

ACOUSTIC OUTPUT DEVICE Cross-reference to related applications RCb / nn / eznz / E / YiAi This application claims priority over Chinese Patent Application No. 202110383452.2, submitted on April 9, 2021, and whose full content is incorporated herein by reference. Field of Invention This presentation relates to the field of acoustics and, in particular, to acoustic output devices. Background of the Invention With the gradual popularization of electronic devices, people have increasingly higher expectations for them. Electronic devices such as headphones must be comfortable to wear and have good acoustic performance. Therefore, it is desirable to provide an acoustic output device with improved acoustic performance. Summary of the Invention The models described herein provide an acoustic output apparatus. The acoustic output apparatus may include a bone conduction acoustic installation configured to generate bone conduction sound waves; an aerotympanic conduction acoustic installation configured to generate aerotympanic conduction sound waves; and a housing that includes an accommodation chamber configured to house the bone conduction acoustic installation and the aerotympanic conduction acoustic installation, wherein at least a portion of the housing may be in contact with a user's skin to transmit the bone conduction sound waves under the action of the bone conduction acoustic installation; and the aerotympanic conduction sound waves may be generated based on vibrations of at least one of the housing or the bone conduction acoustic installation when the bone conduction sound waves are generated. In some modalities, the bone conduction acoustic installation may include a transducer device, and the transducer device may include: a magnetic circuit installation configured to generate a magnetic field; a vibrating spike connected to the housing; and an au coil <dto conecta«da a la - 2 vibrating plate, in 'where the audio coil can vibrate in the magnetic field in response to a sound signal, and cause the vibrating plate to vibrate to generate bone conduction sound waves. In some modalities, the aerothyrpanic conduction acoustic installation may include a diaphragm connected to at least one of the 'bone conduction' acoustic installation or housing, and vibrations from the at least one of the 'bone conduction' acoustic installation or housing may drive the diaphragm to generate the aerothyrpanic conduction sound waves. In some embodiments, the housing chamber may include a first cavity and a second cavity separated by the diaphragm, wherein a first portion of the housing may form the first cavity and may be connected to the bone conduction acoustic installation to transmit the bone conduction sound waves; and a second portion of the housing may form the second cavity and may include one or more acoustic openings in communication with the second cavity, and the aerothyrotropic conduction sound waves may be guided out of the housing through one or more acoustic openings. In some modalities, a bone conduction sound wave frequency response curve may include at least one resonant peak; the at least one resonant peak may have a first resonant frequency when the diaphragm is connected to the bone conduction acoustic installation and the housing; the at least one resonant peak may have a second resonant frequency when the diaphragm is disconnected from at least one of the bone conduction acoustic installation or the housing; and the ratio of the absolute value of the difference between the first resonant frequency and the second resonant frequency to the first resonant frequency may be less than or equal to 50%. In some modalities, the first resonant frequency may be less than or equal to 500 Hz. In some modalities, the absolute value of the difference between the first resonance frequency and the second resonance frequency can be in a range of 0 Hz-50 Hz. In some modalities, the diaphragm may include an annular structure, the inner wall of the diaphragm may surround the bone conduction acoustic installation and the outer wall of the diaphragm may be connected to the housing. In some modalities, the diaphragm may include: a first connecting part that surrounds the bone conduction acoustic installation and connects to the RCb / nn / eznz / E / YiAi -3 bone conduction acoustic installation; a second connection part connected to the housing; and a folding part connecting the first connection part and the second connection part. In some forms, the first connection part, the second connection part, and the folding part may be integrally formed. In some forms, the fold portion may include at least one convex region or one concave region. In some forms, the concave region may be sunken into the second cavity. In some modalities, the concave region may have a first depth, a first separation distance may be between the first connection part and the second connection part, and the relationship between the first depth and the first separation distance may be in a range of 0.2-1.4. In some forms, the concave region may have a width of half the depth to half the depth of the first depth, and the ratio of the width of half the depth to the first 'separation distance' may be in a range of 0.2-0.6. In some modalities, there may be a first projection distance between a first connection point and a second connection point along the 'vibration direction of the bone conduction acoustic installation', the first connection point can be a connection point between the fold part and the first connection part, the second connection plinth can be a connection point between the fold part and the second connection part, and the ratio between the first projection distance and the first separation distance can be in a range of 0-1.8. In some forms, the fold portion may include: a first transition segment, one end of the first transition segment being connected to the first connecting portion; a second transition segment, one end of the second transition segment being connected to the second connecting portion; a third transition segment, one end of the third transition segment being connected to the other end of the first transition segment; a fourth transition segment, one end of the fourth transition segment being connected to the other end of the second transition segment; and a fifth transition segment, two ends of the fifth transition segment being connected to one end of the third transition segment and to the other end of the fourth transition segment. RCb / nn / eznz / E / YiAi - 4 transition segments, respectively, wherein in a 'direction from a connection point between the first transition segment and the first connecting part to a vertex of the fold part, an angle included between a tangent line on one side of the first transition segment which is oriented towards the concave region and towards the vibration direction of the bone conduction acoustic installation may gradually decrease, and an angle included between a tangent line on one side of the third transition segment which is oriented towards the concave region and towards the vibration direction of the bone conduction acoustic installation may remain constant or gradually increase; and in a 'direction from a connection point between the second transition segment and the second connecting part to the vertex, an angle included between a tangent line on one side of the second;The transition segment cpie is oriented towards the concave region and the vibration direction of the bone conduction acoustic installation may gradually decrease, and an included angle between a tangent line on one side of the fourth transition segment c[ue oriented towards the concave region and towards the vibration direction of the bone conduction acoustic installation may remain constant or gradually increase. In some modalities, in a direction perpendicular to the 'vibration direction of the bone conduction acoustic installation, the first transition segment, the second transition segment, and the fifth transition segment may have a first projection length, a second projection length, and a third projection length, respectively, and the ratio of the sum of the first projection length and the second projection length to the third projection length may be in the range of 0.4-2.5. In some forms, the first transition sediment may be in the shape of an arc, and the radius of the arc may be greater than or equal to 0.2 nm. In some modalities, the second transition segment may be arc-shaped, and the arc radius may be greater than or equal to 0.3 mm. In some modalities, the 'fifth transition segment may be arc-shaped, and the radius of the arc may be greater than or equal to 0.2 rnrn. In some configurations, the acoustic air conduction installation may also include a reinforcing member, and the second connection port may be connected to the housing via the reinforcing member. In some embodiments, the reinforcing member may include a reinforcing ring, and the second connecting part may be connected to an annular surface. RCb / nn / eznz / E / YiAi interior of the reinforcing ring and an end surface of the reinforcing ring. In some versions, the reinforcing ring can be injection molded onto the second connecting part. In some models, the width of the reinforcing ring may be greater than or equal to 0.4 mm. In some models, the hardness of the reinforcing ring may be greater than the hardness of the diaphragm. In some embodiments, the magnetic circuit installation may include a magnetic conduction cover and a magnet disposed within the magnetic conduction cover, and the first connection part can be injection molded onto the outer peripheral surface of the magnetic conduction cover. In some embodiments, the bone conduction acoustic installation may further include: an audio coil holder connected to the housing, wherein the audio coil can be connected to the audio coil holder, and the audio coil can extend into a magnetic space between the magnet and the magnetic conduction cover; and an elastic member, wherein the central region of the elastic member can be connected to the magnet, and a peripheral region of the elastic member can be connected to the audio coil holder in such a way that the magnetic circuit installation can be suspended in the housing. In some models, the audio coil support and the elastic member can be arranged in the first cavity. In some embodiments, the audio coil support may include: a main body connected to the peripheral region of the elastic member; a first support, one end of the first support being connected to the main body, and the other end of the first support being connected to the audio coil; and a second support, one end of the second support being connected to the main body, and the other end of the second support pressing the reinforcing member onto a platform of the housing. In some modalities, there may be a first distance from a connection point between the fold portion and the first connection portion to a lower surface of the bone conduction acoustic installation; there may be a second distance from the central region of the elastic limb to the lower surface of the bone conduction acoustic installation; and the ratio between the first distance and the second distance may be in the range of C.3RCb / nn / eznz / E / YiAi - 6 0.8. In some modalities, there may be a third 'distance' from the center of gravity of the magnet to the lower surface of the bone conduction acoustic installation, and the ratio between the first 'distance' and the third 'distance' may be in the range of 0.7-2. In some modalities, the first 'distance' may be greater than the third distance. In some modalities, at least a portion of the acoustic opening may be located between the connection point and the lower surface of the bone conduction acoustic installation. In some modalities, the thickness of the diaphragm may be less than or equal to 0.2 mm. Some of the additional features of this demonstration can be set out in the following description. These additional features will, in part, become evident to those skilled in the art through a study of the following description and the accompanying drawings, or through an understanding of the production or operation of the methods. The features of this demonstration can be implemented and achieved by practicing or using various aspects of the methods, means, and combinations set forth in the following detailed descriptions. RCb / nn / pznz / E / YiAi Brief Description of the Figures of the Invention The present exposition is further illustrated in terms of exemplary forms. These exemplary forms are described in detail with reference to the drawings. These forms are non-limiting exemplary forms, where the same reference numbers represent similar structures, where: Figure 1 is a schematic diagram illustrating an exemplary acoustic output system according to some modalities of the present exposition; Figure 2 is a 'block diagram' illustrating an acoustic output apparatus according to some modalities of the present exposition; Figure 3 is a schematic structural diagram illustrating a headset according to some modalities of the present exposition; Figure 4 is a schematic diagram illustrating the cross-section of a central module according to some modalities of the present exposition; Figure 5 is a schematic diagram illustrating the frequency response curves of a central module 400 in Figure 4 according to some modalities of the present exposition; Figure 6 is a schematic diagram illustrating the cross-section of an exemplary structure of a central housing 11 in Figure 4 according to some modalities of the present exposition; Figure 7 is a schematic diagram illustrating the cross-section of an exemplary structure of a transducer 12 in Figure 4 according to some modalities of the present exposition; Figure 8 is a schematic diagram illustrating cross-sections of several exemplary structures of a -diaphragm 13 in Figure 4 according to some modalities of the present exposition; Figure 9 is a schematic diagram illustrating cross-sections of several exemplary structures of diaphragm 13 in Figure 4 according to some modalities of the present exposition; Figure 10 is a graph illustrating the variations of an elastic coefficient of diaphragm 13 of different structures in Figure 9 with displacements according to some modalities of the present exposure; Figure 11 is a schematic diagram illustrating the cross-section of an exemplary structure - of diaphragm 13 in Figure 4 according to some modalities of the present exposition; Figure 12 is a schematic diagram illustrating the cross-section of an exemplary diaphragm according to some modalities of the present exposition; Figure 13 is a schematic diagram illustrating the cross-section of an exemplary diaphragm according to some modalities of the present exposure; Figure 14 is a -diagram illustrating an acoustic output apparatus according to some modalities of the present exposition; Figure 15 is a schematic diagram illustrating an acoustic output apparatus according to some modalities of the present exposition; Figure 16 is a schematic diagram illustrating an acoustic output apparatus -according to some modalities -of the present exposition; Figure 17 is a schematic diagram illustrating an acoustic output apparatus according to some modalities of the present exposition; Figure 18 is a schematic diagram illustrating an output apparatus RCb / nn / eznz / E / YiAi -8acoustics according to some modalities of the present exhibition; Figure 19 is a schematic acoustic diagram according to some modalities of Figure 20 is an acoustic schematic diagram according to some modalities that illustrates an output apparatus in the present exposition; and copy illustrates an output apparatus in the present exposition. RCb / nn / pznz / E / YiAi Detailed Description of the Invention To illustrate more clearly the technical solutions related to the modalities of this exposition, a brief introduction to the drawings referring to the description of the modalities is provided below. Obviously, the drawings described below are only some examples or modalities of this exposition. Those with ordinary technical skills can, without further creative effort, apply this exposition to other similar scenarios according to these drawings. Unless it is obvious from the context or the context illustrates otherwise, the same number in the drawings refers to the same structure or operation. It should be understood that system, device, unit, and / or module, as used herein, is a method for distinguishing different components, elements, parts, portions, or installations at different levels. However, these terms may be replaced by other expressions if other words can achieve the same purpose. As stated in the statement and claims, the terms a, one, and / or the are not specific to the singular form and may include the plural form unless the context clearly indicates an exception. Generally speaking, the terms comprising, includes, and comprise only suggest the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list; the method or device may also contain other steps or elements. The modalities of the present display provide an acoustic output device. The acoustic output device may include a bone conduction acoustic unit, an air-to-tympanic conduction acoustic unit, and a housing. The bone conduction acoustic unit may be configured to generate bone conduction acoustic waves, the air-to-tympanic conduction acoustic unit may be configured to generate air-to-tympanic conduction acoustic waves, and the housing may include a configured housing chamber. -9 to house the bone conduction acoustic system and the aerotympanic conduction acoustic system. At least a portion of the housing may be in contact with a user's skin to transmit bone conduction sound waves under the action of the bone conduction acoustic system. The aerotympanic conduction sound waves may be generated based on vibrations of at least one of the housing or the bone conduction acoustic system when the bone conduction sound waves are generated.In some modalities, parameters such as spatial position and / or frequency response of the bone conduction acoustic installation and / or aerotympanic conduction acoustic installation can be configured in such a way that the sound quality and low-frequency sound of the acoustic output device can be improved, and sound leakage from the acoustic output device can be reduced, thus improving the user's listening experience. Figure 1 is a schematic diagram illustrating an exemplary acoustic output system according to some of the modalities of this exposition. As shown in Figure 1, the acoustic output system 100 may include a multimedia platform 110, a network 120, an acoustic output apparatus 130, a terminal device 140, and a storage device 150. The multimedia platform 110 can communicate with one or more components of the acoustic output system 100 or an external data source (e.g., a cloud data center). In some embodiments, the multimedia platform 110 can provide data or signals (e.g., audio data from a musical piece) to the acoustic output device 130 and / or the terminal device 140. In some embodiments, the multimedia platform 110 can facilitate data / signal processing for the acoustic output device 130 and / or the terminal device 140. In some embodiments, the multimedia platform 110 can be deployed on a single server or on a group of servers. The server group can be a centralized server connected to the network 120 via an access point or a distributed server connected to the network 120 via one or more access points.In some configurations, the multimedia platform 110 can connect locally to network 120 or remotely to network 120. For example, the multimedia platform 110 can access information and / or data stored on the acoustic output device 130, the terminal device 140, and / or the storage device 150 via network 120. As another example, the storage device 150 can be used as a data storage device for the server. RCbjnn / eznz / E / YiAi - 10 Multimedia Platform 110. In some modalities, Multimedia Platform 110 can be implemented on a cloud platform. By way of example only, the cloud platform may include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an internal cloud, a multi-tier cloud, or similar, or any combination thereof. In some embodiments, the multimedia platform 110 may include a processing device 112. The processing device 112 can perform the main functions of the multimedia platform 110. For example, the processing device 112 can retrieve audio data from the storage device 150 and send the retrieved audio data to the acoustic output device 130 and / or the terminal device 140 to generate sound. As another example, the processing device 112 can process a signal (e.g., generate a control signal) for the acoustic output device 130. In some configurations, the processing device 112 may include one or more processing units (e.g., a single-core or multi-core processing device). By way of example only, the processing device 112 may include a central processing unit (CPU), an application-specific integrated circuit (ASIC), an application-specific instruction set processor (ASIF), 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 controller, a microcontroller unit, a reduced instruction set computer (RISC), a microprocessor, or the like, or any combination thereof. Network 120 can facilitate the exchange of information and / or data. In some embodiments, one or more components (e.g., the multimedia platform 110, the acoustic output device 130, the terminal device 140, and the storage device 150) of the acoustic output system 100 can send information and / or data to other components of the acoustic output system 100 via Network 120. In some embodiments, Network 120 can be any type of wired or wireless network, or a combination thereof. By way of example only, Network 120 can include a cable network, 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 metropolitan area network (MAN), or a telephone network. RCb / nn / eznz / E / YiAi public switched telephone network (PSTN), a Bluetooth network, a Zigbee network, a near field communication (NFC) network, a global system for mobile communications network (GSM), a code division multiple access (CDMA) network, a time division multiple access (TDMA) network, a general packet radio service (GPRS) network, an enhanced data rate GSM evolution (EDGE) network, a wideband code division multiple access (WCDMA) network, a high-speed downlink packet access (HSDPA) network, a long-term evolution (LIE) network, a user datagram protocol (UDP) network, a transmission control protocol / internet protocol (TCP / IP) network, a short message service (SMS) network, a wireless application protocol (WAP) network, an ultra-wideband (LJWB) network, infrared or similar, or any combination thereof.In some configurations, the 120 network may include one or more network access points. For example, the 120 network may include wired or wireless network access points, such as a base station and / or an internet exchange point, through which one or more components of the 100 acoustic output system can connect to the 120 network to exchange data and / or information. The Acoustic Output Device 130 can emit sounds to a user and interact with the user. In some modalities, the Acoustic Output Device 130 can at least provide the user with audio content, such as a song, a poem, a news broadcast, a weather broadcast, an audio lesson, etc. In some modalities, the user can provide a response to the Acoustic Output Device 130 by, e.g., a key press, a screen touch, a body movement, a voice, a gesture, thoughts (e.g., brainwaves), etc. In some modalities, the Acoustic Output Device 130 may include a wearable device. It should be noted that, unless otherwise specified, the wearable device as used herein may include a headset and various other types of personal devices, such as a head-worn device, a shoulder-worn device, or a body-worn device.The wearable device can present the audio content to the user; in some modalities, the wearable device may include a smart headset, smart glasses, a head-mounted display (HMD), a smart armband, smart shoes, a smart helmet, a smart watch, smart clothing, etc. RCb / nn / eznz / E / YiAi - 12. A smart backpack, a smart accessory, a virtual reality (VR) headset, VR glasses, VR goggles, an augmented reality (AR) headset, AR glasses, AR goggles, or similar, or any combination thereof. For example, the wearable device could be Google Glass™, Oulus Rift™, HoloLens™, Gear VR™, etc. The acoustic output device 130 can communicate with the terminal device 140 via network 120. In some modes, the communication data may include motion parameters (e.g., a geographical location, a direction of movement, speed of movement, acceleration, etc.), voice parameters (voice volume, voice content, etc.), gestures (e.g., a handshake, a head shake, etc.), user thoughts, and other types of data and / or information that the acoustic output device 130 can receive. In some modes, the acoustic output device 130 can also send the received data and / or information to the multimedia platform 110 or the terminal device 140. In some embodiments, the terminal device 140 can be customized, e.g., through an application installed on it, to communicate with the acoustic output apparatus 130 and / or implement data / signal processing for the acoustic output apparatus 130. The terminal device 140 can include a mobile device 140-1, a tablet computer 140-2, a laptop computer 140-3, an in-vehicle device 140-4, or the like, or any combination thereof. In some embodiments, the mobile device 140-1 can include a smart home device, a smart mobile device, or the like, or any combination thereof.In some embodiments, the smart home device may include a smart lighting device, a smart electrical device control device, a smart monitoring device, a smart television, a smart camera, an intercom, or the like, or any combination thereof. In some embodiments, the smart mobile device may include a smartphone, a personal digital assistant (PDA), a gaming device, a navigation device, a point-of-sale (POS) device, or the like, or any combination thereof. In some embodiments, the in-vehicle device may include an in-vehicle computer, an in-vehicle television, an in-vehicle tablet computer, or the like. In some embodiments, the terminal device RCb / nn / eznz / E / YiAi - 13 may include a signal transmitter and a signal receiver. The signal transmitter and signal receiver may be configured to communicate with a positioning device (not shown in the Figure) to locate the user and / or the terminal device 140. In some modalities, the multimedia platform 110 or the storage device 150 may be integrated into the terminal device 140. In such cases, the functions that the multimedia platform 110 can implement may be similarly implemented by the terminal device 140. The 'device <de almacenamiento 150 puede almacenar datos y / o instrucciones. En algunas modalidades, el 'dispositivo de almacenamiento 150 puede almacenar los datos adquiridos de la plataforma multimedia 110, del aparato de salida acústica 130 y / o del dispositivo terminal 140. En algunas modalidades, el dispositivo de almacenamiento 150 puede almacenar los 'datos y / o instrucciones para implementando varias funciones para la plataforma multimedia 110, el aparato de salida acústica 130 y / o el dispositivo terrrúnal 140. En algunas modalidades, el dispositivo de almacenamiento 150 puede incluir una memoria masiva, una memoria extraíble, una memoria volátil de lecoura y escritura, una memoria de sedo lectura (ROM) o lo sirrilar, o cualquier combinación de los mismos. Por ejemplo, el almacenamiento masivo puede incluir un disco magnético, un disco óptico, una unidad de estado sólido o lo similar.For example, removable storage can include a flash drive, floppy disk, optical disc, memory card, compact disc, magnetic tape, or similar. For example, volatile read / write memory can include random access memory (RAM). For example, RAM can include dynamic RAM (DRAM), double data rate synchronous dynamic RAM (DDR-SDRAM), static RAM (SRAM), thyristor RAM (T-RAM), zero capacitor RAM (Z-RAM), or similar. For example, RCM can include mask RCM (IMRCM), programmable ROM (PROM), erasable programmable ROM (FPROM), electrically erasable programmable ROM (EEPRCM), compact disc ROM (CD-ROM), digital versatile disc RCM, or similar. In some modalities, the 'storage device 150 can be implemented on a cloud platform.By way of example only, the cloud platform might include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an internal cloud, a multi-tier cloud, or something similar, or any combination thereof. In some configurations, one or more output system components. RCb / nn / eznz / E / YiAi - 14 acoustic 100 can access the data or instructions stored in the '.storage device 150 via the network 120. In some modes, the 'storage device 150 can be connected directly to the multimedia platform 110 as server storage. In some configurations, the multimedia platform 110, the terminal device 140 and / or the storage device 150 can be integrated into the acoustic output device 130. In some configurations, as the technology and processing capacity of the acoustic output device 130 advances, the entire processing can be performed by the acoustic output device 130. For example, the acoustic output device 130 can include a smart headset, an MP3 player, a hearing aid, etc., with highly integrated electronic components, such as a central processing unit (CPU), a graphics processing unit (GPU), etc., so it has a strong processing capacity. Figure 2 is a block diagram illustrating an acoustic output device according to some embodiments of this disclosure. As shown in Figure 2, in some embodiments, the acoustic output device 200 may include a signal processing module 210 and an output module 220. In some embodiments, the acoustic output device 200 may be an embodiment of the acoustic output device 130 of the acoustic output system 100. In some embodiments, the signal processing module 210 may receive an audio signal (e.g., an electrical signal) from a signal source and process the audio signal (e.g., the electrical signal). In some embodiments, the audio signal (e.g., the electrical signal) may represent audio content (e.g., music) to be output by the acoustic output device. In some embodiments, the audio signal (e.g., the electrical signal) may be an analog signal or a digital signal.In some modalities, the audio signal (e.g., the electrical signal) can be obtained from a local storage device, a cloud storage device, or other terminal devices or multimedia platforms. The 210 signal processing module can process the audio signal (e.g., the electrical signal). For example, the 210 signal processing module can process the electrical signal by performing various signal processing operations (e.g., mastering, digitization, compression, frequency division, frequency modulation, encoding, etc.), or a combination thereof. RCb / nn / eznz / E / YiAi In some modes, the signal processing module 210 can generate a control signal based on a processed audio signal (e.g., the electrical signal). In some modes, the control signal can be used to control the output module 220 to emit the corresponding sound waves (i.e., the audio content). In some embodiments, an output module 220 can generate and emit bone conduction sound waves (also called bone conduction sound) and / or air conduction sound waves (also called air conduction sound). The output module 220 can receive the control signal from the signal processing module 210 and generate the corresponding bone conduction sound waves and / or air conduction sound waves based on the control signal. It should be noted that, in this discussion, bone conduction sound waves may refer to sound waves conducted through a solid medium (e.g., bone) in the form of mechanical vibration, and air conduction sound waves may refer to sound waves conducted through air in the form of mechanical vibration. In some embodiments, the output module 220 may include a bone conduction acoustic installation 221 and an aerotympanic conduction acoustic installation 222. In some embodiments, the bone conduction acoustic installation 221 and the aerotympanic conduction acoustic installation 222 may be housed in the same enclosure. At least a portion of the enclosure may be used to make contact with a user's skin to transmit the bone conduction sound waves generated by the bone conduction acoustic installation 221 to the user. In some embodiments, the bone conduction acoustic installation 221 and / or the aerotympanic conduction acoustic installation 222 may be electrically coupled to the signal processing module 210. In some embodiments, the bone conduction acoustic installation 221 may generate the bone conduction sound waves in a specific frequency range (e.g., low frequency range, medium frequency range, high frequency range, low-medium frequency range, high-medium frequency range, etc.) based on the control signal generated by the signal processing module 210. In some modalities, the aerotympanic conduction acoustic installation 222 can generate acrotympanic conduction sound waves in the same frequency range as the bone conduction acoustic installation 221 based on the vibrations of the bone conduction acoustic installation 221 and / or the vibrations. RCb / nn / eznz / E / YiAi - 16 of the housing that houses the bone conduction acoustic installation 221 and the aerotympanic conduction acoustic installation 222. In some modalities, the bone conduction acoustic installation 221 and the aerothyrotropic acoustic conduction installation 222 may be two independent functional devices or two independent components of a single device. As described herein, the independence of a first device from a second device means that the operation of one is independent of the operation of the other, and the operation of the second device is not caused by the operation of the other. <del primer dispositivo y el segundo dispositivo, o en otras palabras, funcionamiento de uno del no es resultado otro 'dispositivo dispositivo'. tomando la instalación acústica conducción ósea 221 aerot imp.-ánica 222 como ejempdo, algunas modalidades, aerotirrpánica pueden obtener respectivamente señales control módulo procesamiento 210, generar ondas sonoras correspondientes base a su señal correspondiente. en ser dos dispositivos componentes funcionales cjue tienen una función independiente pero un interdependíente. por ejempúo, puede depender ósea, cuando genera las vibraciones osea hacer que vibre para aerotirrpánica. como ejemplo, recibe móoulo pumeesami ento vibrar ósea. las carcasa vibre, vibración vibro oonducción aerotimpánica. ceterrrinarse diferentes rangos frecuencia rcbjnn eznz e yiai - 17 acuerdo con necesidades reales. rango frecuencias bajas (también denominado bajas) referirse 20 hz 150 hz, media (tamoién medias) 5 khz, altas conocido altas) khz media-baja medias-bajas) 500 mecia-alta medias-altas) khz. corro baja 300 p-uede 3 alta 100 1000 media-alta 10 debe notarse los anteriores son solo fines ilustrativos pretenden irritantes. la definición variar escenarios aplicación 'diferentes estándares clasificación. algunos otros aplicación, 80 160 1280 2560 hz. tener sobreposición. simplemente modo aerotimpánica p.riede emitir mismo diferente rango; generadas por 221. ejemplo;, paieden incluir co conduccic>Sound waves are primarily transmitted through the mid-to-high frequencies, and aerotympanic conduction waves can include aerotympanic conduction waves at mid-to-low frequencies. RCb / nn / eznz / E / YiAi - 18. Aerotympanic speakers in the low-mid frequencies can be used to complement bone conduction sound waves in the high-mid frequencies, so that the total output of the acoustic output device can cover both the low-mid and high-mid frequencies. In such cases, the acoustic output device can provide better sound quality (especially at low frequencies) and intense vibrations from the bone conduction speaker at low frequencies can be avoided. As another example, bone conduction sound waves may include bone conduction sound waves at low to mid frequencies, and air-tympanic conduction sound waves may include air-tympanic conduction sound waves at high to mid frequencies. In such cases, since the user is sensitive to bone conduction sound waves at low to mid frequencies and / or air-tympanic conduction sound waves at high to mid frequencies, the acoustic output device may provide alerts or warnings to the user through the bone conduction acoustic system and / or the air-tympanic conduction acoustic system. To give another example, aerotympanic conduction sound waves can include aerotympanic conduction sound waves in low-mid frequencies, and bone conduction sound waves can include frequencies in a wider frequency range than aerotympanic conduction sound waves, thus improving the output effect in the low-mid frequencies and improving the sound quality. It should be noted that the acoustic output apparatus provided in the modalities of this exposition may include, but is not limited to, a earphone, a loudspeaker, or other electronic devices. In some modalities, the acoustic output apparatus may also be a portion of the earphone, loudspeaker, or other electronic devices. The acoustic output apparatus provided by the modalities of the present exhibition will be described in detail below, taking the headphones as an example in combination with the accompanying drawings. Figure 3 is a schematic structural diagram illustrating a headset according to some of the modalities of this exposition. As shown in Figure 3, the headset 300 may include two central modules 10, two ear hook components 20, and one back hook component 30. Two ends of the back hook component 30 may be connected to one end of the component RCb / nn / eznz / E / YiAi - 19 corresponding ear hook 20, respectively. The other end of each hook component lifts the ear 20 away from the back hook component 30 and can be connected to a corresponding central module 10. In some modalities, the back hook component 30 may be curved to wrap around the back of the user's head, and the ear hook component(s) 20 may also be curved to hang between the user's ears and head (e.g., an above-the-ear position) to facilitate the use of the headphones 300. In some modalities, the central module(s) 10 may include a bone conduction acoustic installation 221 and an aerotympanic conduction acoustic installation 222 to convert an electrical signal into mechanical vibrations so that the user can hear the sound through the headphones 300.When using the 300 headset, the two central modules 10 can be placed on a left side and a right side of the user's head, respectively, and the two central modules 10 can press against the user's head under the coordination of the two 'ear hook' components 20 and the 'back hook' component 30 in such a way that the user can hear the sound output of the 300 headset through bone conduction and / or aerotympanic conduction. In some configurations, the 300 headset can also be used in other ways. For example, the ear hook components 20 can cover or enclose the user's ears. As another example, the back hook component 30 can be placed on the top of the user's head, which is not listed herein. With reference to Figure 3, the earphone 300 may further include a main control circuit board 40 and a battery 50. The main control circuit board 40 and the battery 50 may be arranged in a housing chamber of a single ear hook component 20, or they may be arranged in the housing chambers of the two ear hook components 20, respectively. In some embodiments, the main control circuit board 40 and the battery 50 may be electrically connected to the two central modules 10 via the corresponding conductors. In some embodiments, the main control circuit board 40 may be configured to control the central modules 10 to convert the electrical signal into mechanical vibrations, and the battery 50 may be configured to provide RCbjnn / eznz / E / YiAi -20 Electrical power to the 300 earphones. It should be noted that the 300 earphone described in the modalities of this exposition may also include microphone devices, such as a microphone, a sound pickup, and communication components, such as Bluetooth and NFC, which may also be connected to the main control circuit board 40 and the battery 50 via corresponding conductors to achieve the corresponding functions. In some modalities, there may be two central modules 10 that can convert the electrical signal into mechanical vibrations so that the 300 earphone can achieve stereo sound effects, which can enhance the user experience. In some other application scenarios that do not require particularly loud stereo sound, for example, hearing aids for hearing-impaired patients, teleprompters in live broadcasts by hosts, etc., the 300 headset can include only one central module 10. According to the above descriptions, the central modules 10 can be configured to convert the electrical signal into mechanical vibrations in an on state, in such a way that the user can hear the sound through the earphone 300. In some modalities, the mechanical vibrations can act directly on the user's auditory nerve mainly with the user's bones and tissues as the medium based on the principle of bone conduction, or the mechanical vibrations can act on the user's auditory nerve mainly with the air as the medium based on the principle of aerodynamic conduction.For the sound heard by the user, mechanical vibrations acting on the user's auditory nerve primarily through the user's bones can be called bone conduction sound, and mechanical vibrations acting on the user's auditory nerve primarily through the air can be called aerothymonic conduction sound. Accordingly, the central modules 10 can generate both bone conduction sound and aerothymonic conduction sound, and can also generate both simultaneously. It should be noted that the description of the 300 earphone is provided solely for illustrative purposes and I do not intend to limit the scope of this exposition. Experts in the field may make various alterations and modifications based on the description in this exposition. However, these variations and RCb / nn / eznz / E / YiAi - 21 modifications do not fall outside the scope of this exposition. In some embodiments, the 300 headset may include one or more additional components. In some embodiments, one or more components may be omitted from the 300 headset. For example, the 300 headset may include a central module 10 and / or a component of <gancho para la oreja 20. Como otro ejemplo, el auricular 300 puede no incluir el componente de gancho; posterior 30. Figure 4 is a schematic diagram illustrating the cross-section of a central module according to some modalities of the present exposition. In some modalities, a central module 10 of the acoustic output apparatus 300 in Figure 3 may have a structure equal to or similar to that of the central module 400 in Figure 4. In some modalities, the central module 400 may also be referred to as an output module. In some modalities, the central module 400 may include a bone conduction acoustic installation or an aerotympanic conduction acoustic installation. As shown in Figure 4, the central module 400 may include a housing 11 and a transducer 12. In some modalities, the transducer 12 may be used as a bone conduction acoustic installation (e.g., bone conduction acoustic installation 221 in Figure 2) or as a portion of the bone conduction acoustic installation. In some modalities, the housing 11 may be connected to one end of an ear hook component and configured to make contact with a user's skin to transmit mechanical vibrations to the user. In some modalities, the housing 11 may include a housing chamber (not shown in the Figure). The transducer 12 may be disposed in the housing chamber and connected to the housing 11. In some modalities, the transducer 12 may be configured to convert an electrical signal into mechanical vibrations in an on state, such that a skin contact region of the housing 11 (e.g.e.g., a lower front plate 1161 in Figure 6) can generate a low bone conduction sound; the action of the transducer 12. In such cases, when the user wears the earphone 300, the electrical signal can be converted into mechanical vibration through the transducer 12 to drive the contact region with the skin to generate mechanical vibrations, and the mechanical vibrations can further act on the auditory nerve of the user through the user's bones and tissues, in such a way that the user can hear the bone conduction sound through the central modules 400. For example, exemplary ways of converting. RCb / nn / eznz / E / YiAi - 22 signals may include, but are not limited to, an electromagnetic type (e.g., a moving-coil audio type, a moving-iron type, and a magnetostrictive type), a piezoelectric type, an electrostatic type, or the like. In some configurations, the central module 400 may include a diaphragm 13 connected between the transducer 12 and the housing 11. <diafra«gma 13 p«ue«de ser una instalación acústica «de conducción aerotimpánica (e.g., la instalación acústica «de conducción aerotirrpánica 222 en la Frgura 2) o una p;orción «de la instalación acústica de conducción aerotimpánica. En algunas modalidades, el diafra«gma 13 puede conectarse físicamente a al menos una «de la instalación acústica de conducción ósea 221 o la carcasa 11. Las vibraciones «del al menos una de la instalación acústica «de con<duccíón ósea 221 o la carcasa 11 pueden impulsar al > diaphragm 13 to generate aerotympanic conduction sound waves. For example, the diaphragm 13 can have an annular structure (e.g., an annular structure in Figure 15), the inner side of the diaphragm 13 can surround the transducer 12 and the outer side of the diaphragm 13 can be connected to the housing 11. In some embodiments, the diaphragm 13 can separate the interior space (i.e., the housing chamber) of the housing 11 into a first chamber 111 (also referred to as the front chamber) near the skin contact region and a second chamber 112A (also referred to as the rear chamber) far from the skin contact region. A first portion of the housing 11 can form the first chamber 111 and connect to the transducer 12 to transmit the bone conduction sound waves. A second portion of the housing 11 can form the second chamber 112A. In other words, when the user wears the earphone 300, the first chamber 111 can be closer to the user than the second chamber 112A. In some models, the housing 11 may include an acoustic opening 113 in communication with the second cavity 112A.The diaphragm 13 can generate aerotympanic conduction sound during relative movement between the transducer 12 and the housing 11, and transmit the aerotympanic conduction sound to the human ears through the acoustic opening 113. In other words, the diaphragm 13 can be connected to the housing 11 and / or the transducer 12. When the transducer 12 moves with respect to the housing 11, the housing 11 and / or the transducer 12 can together cause the diaphragm 13 to vibrate to generate the aerotympanic conduction sound. The aerotympanic conduction sound can be emitted through the acoustic opening 113. In such cases, the sound generated in the second cavity 112A can be transmitted through the acoustic opening 113. RCb / nn / eznz / E / YiAi -23 and then act on the user's eardrums through the air in such a way that the user can also hear the aerotympanic conduction sound through -the central 400 modules. In some modalities, the central module 400 may include one or more (e.g., two or more) diaphragms 13. By way of example only, in some modalities, the central module 400 may include a first diaphragm and a second diaphragm. In some modalities, the first and second diaphragms may be arranged substantially parallel or oblique to each other. In some modalities, the first and second diaphragms may be located between the lower surface (e.g., the surface of the bone conduction acoustic installation 221 away from the skin contact region) of the bone conduction acoustic installation (e.g., the bone conduction acoustic installation 221 in Figure 2) and the lower surface (e.g., the lower plate 1151 in Figure 6) of the housing 11.The first diaphragm can be connected to the bone conduction acoustic installation 221, and the second diaphragm can be connected to the housing 11 in such a way that the first diaphragm can receive vibrations from the bone conduction acoustic installation 221 and the second diaphragm can receive vibrations from the housing 11. Further descriptions of the diaphragm can be found elsewhere in this exposition (e.g., detailed descriptions in Figures 14-20). In some modalities, the aerotympanic conduction acoustic installation (e.g., aerotympanic conduction acoustic installation 222 in Figure 2) may include an independent driving source. The diaphragm 13 may be a portion of the aerotympanic conduction acoustic installation and may be connected to the driving source of the aerotympanic conduction acoustic installation in such a way that the diaphragm 13 can vibrate under the driving source and generate the aerotympanic conduction sound. For example, the aerotympanic conduction acoustic installation may not depend on the bone conduction acoustic installation and may include an independent driving source. The diaphragm 13 may be connected to the driving source and vibrate under the driving source to generate the aerotympanic conduction sound. Just as an example, the driving source may include a transducer.The transducer may be similar to transducer 12. It should be noted that, in order to ensure the synchronization of the aerotympanic conduction sound and the bone conduction sound generated by the central module 400, the vibrations generated by transducer 12 and the vibrations generated by the driving source in the. RCb / nn / eznz / E / YiAi - 24 Aerotympanic conduction acoustic installations may have the same phase or similar phases. For example, the 'phase difference between the vibrations generated by the transducer 12 and the vibrations generated by the driving source in the aerotympanic conduction acoustic installation may be less than a threshold, such as π, 2π / 3, π / 2, etc. In some modalities, with reference to Figure 4, the fact that transducer 12 does <que la región de contacto con la piel se desplace hacia la cara del usuario puede considerarse simplemente como una mejora del sonido de conducción 'ósea. Mientras tanto, una porción de la carcasa 11 opuesta a la región 'de contacto con la piel puede moverse nacía la cara del usuario, y el transductor 12 y el diafra'gma 13 conectado al mismo pueden alejarse de la cara del usuario debido a la relación entre la fuerza de acción y la fuerza de reacción. En tales casos, el aire en la segunda cavidad 112A puede comprimirse, lo que causa un aumento en la presión del aire y mejora el sonido transmitido a través de la abertura acústica 113, lo que puede considerarse simplemente como una mejora 'del sonido de conducción aerotimpánica. Por consiguiente, cuando el sonido 'de conducción ósea se debilita, el sonido de conducción aerotimpánica también puede debilitarse.In such cases, the bone conduction sound and the aerothyrpani conduction sound generated by the central module 400 of the present exposure may have equal or similar phase characteristics. In some embodiments, since the first cavity 111 and the second cavity 112A are substantially separated by structures such as the diaphragm 13 and the transducer 12, a change in air pressure in the first cavity 111 may be exactly opposite to a change in air pressure in the second cavity 112A. Consequently, the housing 11 may also include a relief orifice 114 in communication with the first cavity 111. The relief orifice 114 may allow the first cavity 111 to communicate with an external environment; that is, air may freely enter and exit the first cavity 111. In such cases, a change in air pressure in the second cavity 112A may not be blocked by the first cavity 111 as much as possible, which can effectively improve the acoustic performance of the aerotympanic conduction sound generated by the central modules 400.In some embodiments, the relief hole 114 may not be adjacent to the acoustic opening 113, such that the sound attenuation due to the opposite phases of the sounds transmitted from the relief hole 114 and the RCb / nn / eznz / E / YiAi The acoustic opening 113 can be reduced as much as possible. For example, the relief hole 114 can be as far away from the acoustic opening 113 as possible. Just as an example, the actual area of ​​an outlet end of the acoustic opening 113 can be greater than or equal to 8 m² so that the user can hear more aerotympanic conduction sound. The actual area of ​​an inlet end of the acoustic opening 113 can be greater than or equal to the actual area of ​​the outlet end of the acoustic opening 113. In some embodiments, since structures such as the housing 11 have a certain thickness, a through-hole such as the acoustic opening 113 and the relief hole 114 in the housing 11 may have a certain depth. Thus, for the housing cavity, the through-hole such as the acoustic opening 113 and the relief hole 114 may have the inlet end close to the housing chamber and the outlet end far from the housing chamber. Furthermore, the actual area of ​​the outlet end described herein may be defined as the area of ​​an end surface where the outlet end is located. According to the above method, since the aerotympanic conduction sound and the bone conduction sound generated by the central modules 400 originate from the same vibration source (i.e., the transducer 12), the phases of the aerotympanic conduction sound and the bone conduction sound are also the same or similar, so that the user can hear an enhanced sound through the acoustic output device (e.g., a headset including the central module 400) and the acoustic output device (e.g., the headset including the central module 400) can be more energy efficient, thus extending the life of the acoustic output device (e.g., the headset including the central module 400).Furthermore, aerotympanic conduction sound and bone conduction sound can also cooperate with each other in a frequency band of a frequency response range through a reasonable structural design of the 400 core modules, such that the 300 earphone can have excellent acoustic performance in a specific frequency band. For example, the 300 earphone can have better acoustic performance at low frequencies by compensating for the low-frequency band of bone conduction sound using aerotympanic conduction sound. As another example, the sound quality of the 300 earphone can be improved by enhancing the mid-frequency and mid-high-frequency bands of bone conduction sound using sound. RCb / nn / eznz / E / YiAi -26 of aerotympanic conduction. In some modalities, when diaphragm 13 is connected to transducer 12 and housing 11, at least one resonant peak may have a first resonant frequency fl, and when diaphragm 13 is disconnected from at least one transducer 12 or housing 11, at least one resonant peak may have a second resonant frequency f2. The ratio of the absolute difference between the first resonant frequency fl and the second resonant frequency f2 to the first resonant frequency fl may be less than a threshold. For example, the ratio may be less than or equal to 50% (i.e., fl-f2 / f1 = 50%). As another example, the ratio may be less than or equal to 40%. As another example, the ratio may be less than or equal to 30%. As another example, the ratio may be less than or equal to 20%.In some modalities, the difference between the maximum resonance intensity corresponding to fl and the maximum resonance intensity corresponding to f2 may be less than or equal to 5 dB. In some modalities, the difference between the maximum resonance intensity corresponding to fl and the maximum resonance intensity corresponding to f2 may be less than or equal to 3 dB. In some modalities, the difference between the maximum resonance intensity corresponding to fl and the maximum resonance intensity corresponding to f2 may be less than or equal to 1 dB. In some modalities, f1-f2 / f1 may indicate the influence of the diaphragm 13 on an effect of the transducer 12 that drives the skin contact region; the smaller the ratio, the smaller the effect.In such cases, the central module 400 can synchronously emit bone conduction and aerotympanic conduction sounds with the same or similar phases by introducing diaphragm 13 without affecting the original resonant system of the central module 400 as much as possible, thus improving the acoustic performance of the central module 400. In the acoustic output device provided in this mode, the transducer 12 can cause diaphragm 13 to vibrate to generate aerotympanic conduction sound without driving diaphragm 13 separately. Compared to the traditional acoustic output device—which drives the diaphragm to generate aerotympanic conduction sound separately—the acoustic output device can be more energy-efficient. For example, shifting a resonance peak into the low-frequency band or the low-mid-frequency band (e.g., f1-1500 Hz) can satisfy certain conditions such that the low frequency and / or the RCbjnn / eznz / E / YiAi The mid-low frequency of bone conduction sound may be unaffected by the diaphragm as much as possible. The resonance peak offset may refer to the absolute value of the difference between the first resonance frequency fl and the second resonance frequency f2 (i.e., fl-f2) of at least one resonance peak. In some modalities, the resonance peak offset in the low-frequency or mid-low-frequency band (i.e., fl-f2 ≤ 0 Hz) may be less than or equal to 50 Hz (i.e., fl-f2 ≤ 350 Hz). In some modalities, the resonance peak offset in the low-frequency or mid-low-frequency band (i.e., f1 ≤ 3500 Hz) may be less than or equal to 30 Hz (i.e., fl-f2 ≤ 330 Hz). In some modalities, the displacement of the resonance peak in the low frequency band or the low-mid frequency band (i.e., ≤ 0 Hz) may be less than or equal to 100 Hz (i.e., |f1—f2|3100 Hz) in such a way that the diaphragm 13 does not affect, as far as possible, the effect of the transducer 12 that drives the skin contact region, i.e., the bone conduction sound is not affected as much as possible. In some modalities, to give the diaphragm 13 a certain structural strength and elasticity, reduce fatigue deformation of the diaphragm 13 in use, and prolong the service life of the diaphragm 13, the offset may be greater than or equal to 5 Hz (i.e., f1-f2|35 Hz). In some modalities, the offset may be greater than or equal to 5 Hz and less than or equal to 50 Hz to give the diaphragm 13 a certain structural strength and elasticity without affecting the effect of the transducer 12 that drives the skin contact region to vibrate. Figure 5 is a schematic diagram illustrating the frequency response curves of the central module 400 of Figure 4 according to some of the modalities described herein. As shown in Figure 5, the skin contact region can generate bone conduction sound under the action of transducer 12, and the bone conduction sound can have a corresponding frequency response curve. The frequency response curve can have at least one resonant peak. As shown in Figure 5, the skin contact region can have a first frequency response curve (e.g., k1+k2 indicated by a dotted line in Figure 5) when the diaphragm 13 is connected to the transducer 12 and the housing 11, and the skin contact region can have a second frequency response curve (e.g., k1+k2 indicated by a dotted line in Figure 5) when the diaphragm 13 is connected to the transducer 12 and the housing 11, and the skin contact region can have a second frequency response curve (e.g., k1+k2) when the diaphragm 13 is connected to the transducer 12 and the housing 11., kl indicated by a continuous line in Figure 5) when the vibration diagram 13 is disconnected from either of the transducers 12 and the housing 11. It should be noted. RCb / nn / eznz / E / YiAi -28 For the frequency response curves in Figure 5 of this presentation, a horizontal axis may represent a frequency in Hz; and a vertical axis may represent the intensity in dB. The resonant frequency (i.e., the second resonant frequency) corresponding to a resonant peak A of the second frequency response curve k1 may be 95 Hz. The resonant frequency (i.e., the first resonant frequency) corresponding to a resonant peak B of the first frequency response curve k1+k2 may be 112 Hz. The offset of the maximum resonant frequency (i.e., |fifi|) may be approximately 17 Hz. In some modalities, to ensure that the diaphragm 13 has a certain structural strength and elasticity, the maximum resonant frequency may have a predetermined offset. Just as an example, the offset may be in the range of 10 Hz–50 Hz. Figure 6 is a schematic diagram illustrating the cross-section of an exemplary structure of a central housing 11 in Figure 4, according to some embodiments of the present disclosure. Referring to Figure 4, in some embodiments, the housing 11 may include a rear housing 115 (i.e., the second portion of the housing 11 in Figure 4) and a front housing 116 (i.e., the first portion of the housing 11 in Figure 4) connected to the rear housing 115. In some embodiments, the rear housing 115 and the front housing 116 may be spliced ​​and enclosed together to form a housing chamber configured to accommodate components such as the transducer 12 and the diaphragm 13. In some embodiments, at least a portion of the front housing 116 may be in contact with the user's skin to form a skin-contact region of the housing 11, i.e.When the housing 11 is in contact with the user's skin, the front housing 116 may be closer to the user than the rear housing 115. In such cases, the transducer 12 may be connected to the front housing 116 in such a way that the transducer 12 can drive the skin contact region of the housing 11 to generate mechanical vibrations. In some embodiments, the housing 11 may include an acoustic opening 113 and a relief hole 114. The acoustic opening 113 may be disposed in the rear housing 115 and the relief hole 114 may be disposed in the front housing 116. In some embodiments, the diaphragm 13 may be connected to the rear housing 115, or it may be connected to the front housing, or it may be connected to a joint between the rear housing 115 and the front housing. RCb / nn / eznz / E / YiAi -29front casing 116. In some embodiments, the rear housing 115 may include the bottom plate 1151 and the side plate 1152. One end of the side plate 1152, far from the bottom plate 1151, may be connected to the front housing 116. The acoustic opening 113 may be arranged in the side plate 1152. In some embodiments, the bottom plate 1151 and the side plate 1152 may be integrally formed. In some embodiments, the bottom plate 1151 may be physically connected to the side plate 1152 by, for example, welding, riveting, bonding, or similar means. In some embodiments, the inner surface of the housing 11 may include a platform 1153. For example, the platform 1153 may be disposed at one end of the side plate 1152 away from the bottom plate 1151. With reference to Figure 6, taking the bottom plate 1151 as a reference, the platform 1153 may be slightly lower than the end surface of the side plate 1152 away from the bottom plate 1151. With reference to Figure 4, in a vibration direction of the transducer 12, the acoustic opening 113 may be disposed between the platform 1153 and the bottom plate 1151. In such cases, the cross-sectional area of ​​the acoustic opening 113 may gradually decrease in a given direction.the direction in which the acoustic aperture 113 is oriented towards a sound guide channel 141 (referred to later) from an inlet end of the acoustic aperture 113 to an outlet end of the acoustic aperture such that the platform 1153 can have sufficient thickness in the vibration direction of the transducer 12, thereby increasing the structural strength of the platform 1153. The outlet end of the acoustic aperture 113 can be an inlet end of the sound guide channel 141 connected to the acoustic aperture 113. In such cases, when the rear housing 115 is clamped to the front housing 116, the front housing 116 can be pressed and secured to a voice coil holder (referred to later) on the platform 1153. In some embodiments, the diaphragm 13 can be fixed to the platform 1153, or pressed onto the platform 1153 by the holder. the audio coil> 121, and then connect to the housing 11. In some embodiments, the front housing 116 may include the bottom plate 1161 and the side plate 1162, and one end of the side plate 1162, far from the bottom plate 1161, may be connected to the rear housing 115. A region where the bottom plate 1161 is located may be considered simply as the region of RCb / nn / eznz / E / YiAi -30 Skin contact described in this document. Accordingly, the relief hole 114 can be arranged in the side plate 1162. In some embodiments, the bottom plate 1161 and the side plate 1162 can be integrally formed. In some embodiments, the bottom plate 1161 can be physically connected to the side plate 1162 by, for example, welding, riveting, joining, or the like. Figure 7 is a schematic diagram illustrating the cross-section of an exemplary structure of the transducer 12 in Figure 4 according to some embodiments of the present disclosure. As shown in Figure 7, in some embodiments, the transducer 12 may include an audio coil support 121, a magnetic circuit assembly 122, an audio coil 123, and an elastic member 124. In some embodiments, the elastic member 124 may include an elastic sheet, an elastic structure (e.g., a sheet structure), or the like. In some embodiments, the audio coil support 121 and the elastic member 124 may be arranged in the first cavity 111.The central region of the elastic member 124 can be physically connected to the magnetic circuit assembly 122, and a peripheral region of the elastic member 124 can be connected to the housing 11 via the audio coil support 121 to suspend the magnetic circuit assembly 122 within the housing 11. In some embodiments, the audio coil 123 can be connected to the audio coil support 121 and extend into a magnetic space of the magnetic circuit assembly 122. In some embodiments, the audio coil support 121 can include a main body 1211, a first support 1212, and a second support 1213. By way of example only, the main body 1211 can be annular, and the first support 1212 and / or the second support 1213 can be cylindrical. The main body 1211 can be connected to the peripheral region of the elastic member 124.The main body 1211 and the elastic member 124 can form an integral structural member by metal injection molding. The main body 1211 can be connected to the front lower plate 1161 through <de una conexión con pegamiento, una conexión a presión o lo similar, o una combinación de las mismas. En algunas modalidades, un extremo del primer soporte 1212 p'Uede conectarse al cuerpo principal 1211, y la bobina de audio 123 puede conectarse al otro extremo del primor soporte 1212 lejos del cuerpo' principal 1211 de tal manera que la bobina de audio pueda extenderse hacia la instalación de circuito magnético 122. Después, una porción del diafragma 13 puede conectarse a. RCb / nn / eznz / E / YiAi -31 the installation of magnetic circuit 122, and another portion of the diaphragm 13 can be connected to at least one of the rear housing 115 and the front housing lio. In some embodiments, one end of the second support 1213 can be connected to the main body 1211. The second support 1213 can surround the first support 1212 and extend laterally into the body; The main body 1211 is in the same direction as the first support 1212. In some embodiments, the second support 1213 and the main body 1211 can be connected to the front housing 116 to increase the connection strength between the audio coil support 121 and the housing 11. For example, the main body 1211 can be connected to the front bottom plate 1161, and the second support 1213 can be connected to the second annular side plate 1152. Accordingly, with reference to Figure 4, the second support 1213 can include an exhaust opening 1214. The exhaust opening 1214 can communicate with the relief hole 114 to prevent the second support 1213 from blocking communication between the relief hole 114 and the first cavity 111.Next, one portion of diaphragm 13 can be connected to the magnetic circuit installation 122, and another portion of diaphragm 13 can be connected to the other end of the second support 1213 away from the main body 1211 and then connected to the housing 11. In such cases, after assembling the central modules 10, the other end of the second support 1213 away from the main body 1211 can press the other portion of diaphragm 13 onto the platform 1153. In some embodiments, the first support 1212 and / or the second support 1213 may be a continuous and complete structure in the circumferential direction of the audio coil support 121 to increase the structural strength of the audio coil support 121, or they may be a partially discontinuous structure to avoid other components. In some modalities, the transducer 12 may include one or more vibrating plates. At least one of the vibrating plates may be physically connected to the housing 11. At least a portion of the housing region 11 (e.g., the skin contact region) may be in contact with the user's skin (e.g., the skin of the user's head), and when the user uses the acoustic output device, bone conduction sound waves may be transmitted to the user's cochlea through the skin contact region. In some modalities, the transducer 12 may include the vibration transmission plate physically connected to at least the vibrating plate and RCbjnn / eznz / E / YiAi The housing 11 is used to transmit vibrations from at least one vibrating plate to the housing. In some embodiments, at least one of the one or more vibrating plates may be the outer wall of the housing 11. In some embodiments, an audio coil 123 may be mechanically connected to one or more vibrating plates. In some embodiments, the audio coil 123 may also be electrically connected to the signal processing module 210. When current (which represents a control signal) is introduced into the audio coil 123, the audio coil 123 may vibrate in a magnetic field (e.g., a magnetic field generated by the magnetic circuit installation 122) and cause one or more vibrating plates to vibrate. The vibrations of one or more vibrating plates 512 may be transmitted to the user's bones through the housing 11 to generate bone conduction sound waves.In some configurations, vibrations from one or more vibrating plates can cause the housing 11 and / or the magnetic circuit assembly 122 to vibrate. Vibrations from the housing 11 and / or the magnetic circuit assembly 122 can cause the air in the housing 11 to vibrate. In some embodiments, the magnetic circuit installation 122 may include one or more magnetic conduction elements (e.g., a magnetic conduction cover 1221) and one or more magnets (e.g., a magnet 1222). The one or more magnetic conduction elements and the one or more magnets may cooperate to form a magnetic field. In some embodiments, the magnetic conduction cover 1221 may include the bottom plate 1223 and the side plate 1224. In some embodiments, the bottom plate 1223 and the side plate 1224 may be integrally formed. In some embodiments, the bottom plate 1223 and the side plate 1224 may be physically connected, for example, by welding, riveting, bonding, or the like. In some embodiments, the magnet 1222 may be disposed on the side plate 1224 and fixed to the bottom plate 1223.One side of the magnet 1222, away from the lower plate 1223, can be connected to the central region of the elastic member 124 via a connecting member 1225, such that the audio coil 123 can extend into a magnetic space between the magnet 1222 and the magnetic conduction cover 1221. In some embodiments, a portion of the diaphragm 13 can be connected to the magnetic conduction cover 1221. It should be noted that the magnet 1222 can be a group of magnets formed by a plurality of sub-magnets. Furthermore, in some embodiments, the magnetic conduction plate (not shown in the Figure) can also be positioned on the side of the magnet 1222 away from the plate. RCb / nn / eznz / E / YiAi -33 lower 1223. Figure 8 is a schematic diagram illustrating cross-sections of several exemplary structures of diaphragm 13 in Figure 4 according to some embodiments of the present exposition. With reference to Figure 8, Figure 7, and Figure 4, in some embodiments, diaphragm 13 may include a first connection part 132, a fold part 133, and a second connection part 134. In some embodiments, the first connection part 132, the fold part 133, and the second connection part 134 may be integrally formed. In some embodiments, the first connection part 132 can surround the transducer 12 and connect to the transducer 12. The second connection part 134 can connect to the housing 11. The folding part 133 can be located between the first connection part 132 and the second connection part 134 and connect the first connection part 132 and the second connection part 134. Simply as an example, the first connecting part 132 may be cylindrical in shape and may be connected to the magnetic conduction cover 1221; the second connecting part 134 may be ring-shaped and may be connected to the other end of the second support 1213 away from the main body 1211 and then connected to the housing 11. In some embodiments, with reference to Figure 7, a connection point between the folding part 133 and the first connecting part 132 may be lower than the end surface of the side plate 1224 away from the bottom plate 1223. In some embodiments, the first connection part 132 may include the bottom plate and a side wall. The bottom plate of the first connection part 132 may cover the bottom of the transducer 12, and the side wall of the first connection part 132 may cover the side surface of the transducer 12 or at least a portion of the side surface of the transducer 12. In some embodiments, the bottom plate of the first connection part 132 may include holes or gaps between bands. In some embodiments, the folded portion 133 can form a concave region 135 between the first connecting portion 132 and the second connecting portion 134, such that the first connecting portion 132 and the second connecting portion 134 can move more easily relative to each other in the vibration direction of the transducer 12, thereby reducing the influence of the diaphragm 13 on the transducer 12. In some embodiments, with reference to Figure 4, the concave region 135 can extend towards the second cavity 112A. In some embodiments, RCb / nn / eznz / E / YiAi -34The concave region 135 can sink into the first cavity 111, i.e., the concave direction of the concave region 135 can be opposite to the concave direction of the concave region 135 in Figure 4, and the concave region can also be referred to as a convex region. With regard to Figure 8, (a)-(d) in Figure 8 illustrate several variations of the diaphragm 13. The main differences between the variations may lie in a specific structure of the fold portion 133. As shown in (a) of Figure 8, the fold portion 133 may include a symmetrical structure, and a connection point between one end of the fold portion 133 and the first connection portion 132, and a connection point between another end of the fold portion 133 and the second connection portion 134, may be coplanar. For example, the projections of the two connection points in the vibration direction of the transducer 12 may coincide.As shown in (b) of Figure 8, the larger portion of fold part 133 may have a symmetrical structure, and the connection point between one end of fold part 133 and the first connection part 132 and the connection point between the other end of fold part 133 and the second connection part 134 may not be coplanar. For example, the projections of the two connection points in the vibration direction of the transducer 12 may be separated from each other. As shown in (c) of Figure 8, fold part 133 may have an asymmetrical structure, and the connection point between one end of fold part 133 and the first connection part 132 and the connection point between the other end of fold part 133 and the second connection part 134 may be coplanar.As shown in (d) of Figure 8, the fold part 133 may have an asymmetric structure, and the connection point between one end of the fold part 133 and the first connecting part 132 and the connection point between the other end of the fold part 133 and the second connecting part 134 may not be identical. In some modalities, there may be a plurality of concave regions 135, such as two or three concave regions 135, and the concave regions 135 may be distributed at intervals in the vertical direction of the vibration direction of the transducer 12; the depths of the concave regions 135 in the vibration direction of the transducer 12 may be equal or different. In some forms, a diaphragm material 13 may include polycarbonate (PC), polyamides (PA), an acrylonitrile butadiene copolymer RCb / nn / eznz / E / YiAi -35 Styrene (ABS), polystyrene (PS), high-impact polystyrene (HIPS), polypropylene (FP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyurethanes (PU), polyethylene (PE), phenol-formaldehyde (PE), urea-formaldehyde resin (UF), melamine-formaldehyde resin (MF), polyarylate (PAR), polyetherimide (PEI), polyimide (PI), polyethylene naphthalate (PEN), polyetheretherketone (PEEK), silica gel or similar, or any combination thereof. PET is a thermoplastic polyester with good molding properties.A diaphragm made of PET can be called Mylar film; PC can have strong impact resistance and stable dimensions after molding; PAR is an advanced version of PC, mainly used for environmental purposes; PEI is softer than PET and has higher internal cushioning; PI has high temperature resistance, a higher molding temperature, and a longer processing time; PEN has high strength and is relatively hard, and can be painted, dyed, and plated; PU is frequently used in a composite material cushioning ring, with high elasticity and high internal cushioning; and PEEK is a new material with friction resistance and fatigue resistance properties.It should be noted that composite materials can generally include the characteristics of several materials, such as a two-layer structure (hot-pressed PU with greater internal strength), a three-layer structure (an interleaving structure with an intermediate cushioning layer of PU, acrylic glue, W adhesive, or pressure-sensitive adhesive), and a five-layer structure (two film layers bonded by double-sided adhesive, and the double-sided adhesive has a base layer (usually made of PET)). In some embodiments, the acoustic air conduction system may further include a reinforcing member. In some embodiments, the reinforcing member may include a reinforcing ring 136. The hardness of the reinforcing ring 136 may be greater than the hardness of the diaphragm 13. In some embodiments, the reinforcing ring 136 may be ring-shaped, the annular width of the reinforcing ring 136 may be greater than or equal to 0.4 mm, and the thickness of the reinforcing ring 136 may be less than or equal to 0.4 mm. In some embodiments, the reinforcing ring 136 may be connected to the second connecting part 134 such that the second connecting part 134 may be connected to the housing 11 through the reinforcing ring 136. In such cases, the structural strength of the diaphragm 13 edge may be increased, thereby increasing the connection strength. RCbjnn / eznz / E / YiAi -36 between the diaphragm 13 and the housing 11. It should be noted that the ring-shaped reinforcing ring 136 is primarily used to facilitate adaptation to the annular structure of the second connection 134. In some embodiments, the reinforcing ring 136 may be a continuous, complete ring or a discontinuous, segmented ring. In some embodiments, after assembling the central modules 10, the other end of the second support 1213, away from the main body 1211, can press the reinforcing ring 136 onto the platform 1153. In some embodiments, the first connecting part 132 can be injection molded onto the outer peripheral surface of the magnetic conduction cover 1221, and the reinforcing ring 136 can also be injection molded onto the second connecting part 134, such that the connection method between the first connecting part 132 and the reinforcing ring 136 can be simplified, and the connection strength between the first connecting part 132 and the reinforcing ring 136 can be increased. The first connecting part 132 can cover the side plate 1224 and can also cover the bottom plate 1223 to increase the contact area between the first connecting part 132 and the magnetic circuit assembly 122, thereby increasing the connection strength between the first connecting part 132 and the magnetic circuit assembly 122.Similarly, the second connecting part 134 can be connected to the inner ring surface and to an outer surface of the reinforcing ring 136 to increase the contact area between the second connecting part 134 and the reinforcing ring 136, thereby increasing the connection strength between the second connecting part 134 and the reinforcing ring 136. In some modalities, for diaphragm 13, under the premise that diaphragm 13 has a certain structural strength to ensure its basic structure, fatigue resistance and other performances, the softer the diaphragm 13, the more likely it is that diaphragm 13 will deform elastically, and the less influence it will have on transducer 12. Figure 9 is a schematic diagram illustrating cross-sections of various structural variations of diaphragm 13 in Figure 4 according to some modalities of the present exposure. Diagrams (a)-(e) in Figure 9 illustrate several structural variations of diaphragm 13; the principal difference between these variations lies in a specific structure and size of the pleated portion 133. In some modalities, the parameters of the structure RCb / nn / eznz / E / YiAi -37specific and the size of (a)-(e) can be shown in the following table: RCb / nn / eznz / E / YiAi No. Fold Thickness Shape Fixed Region Size Fold Width Half-Depth Width Fold Radius (a) 0.2mm Concave 0.4mm 1.7mm 0.7mm 0.35mm (b) 0.2mm Concave 0.8mm 1.3mm 0.7mm 0.35mm (c) 0.2mm Convex 0.4mm 1.7mm 1.0mm 0.5mm (d) 0.2mm Convex 0.8mm 1.3mm 1.0mm 0.5mm (e) 0.1mm Concave 0.4mm 1.7mm 0.7mm 0.35mm In the table above, the thickness of a fold can refer to a thickness (e.g., an average thickness) of the fold part 133, a shape can refer to the direction (e.g., a convex region or a concave region in Figure 8) of the fold part 133, a fixed region size can refer to a width (e.g., W6 in Figure 9(a)) of the diaphragm 13 fixed in the housing 11, a fold width can refer to a total width (e.g., W7 in Figure 9(a)) of the fold part 133, a half-depth width (e.g., Vil in Figure 9(a) and the description below) can refer to a width of the fold part 133 to the half. of the depth of fold part 133, and a fold radius may refer to an arc radius of fold part 133 (e.g., an arc radius of one-fifth of transition seq 1335 described below), wherein the fold radius may be equal to half the width of half the depth. In some configurations, diaphragm 13 may deform and / or displace during vibrations, and this deformation and / or displacement may cause diaphragm 13 to have different elastic coefficients at different positions. For diaphragms 13 with different structures and sizes, the elastic coefficients may vary with displacement. Figure 10 is a graph illustrating the variations of an elastic coefficient of diaphragm 13 for different structures in Figure 9 with displacements according to some modalities of this presentation. As shown in Figure 10, an abscissa can represent the displacement z of diaphragm 13 and an ordinate can represent a elastic coefficient K(z) of diaphragm 13. The elastic coefficient L(z) can vary with displacement. That is, the elasticity of diaphragm 13 can be nonlinear. In some In 38 modalities, the elastic coefficient of diaphragm 13 can be kept stable without varying with displacement by setting parameters such as the structure and size of diaphragm 13, thus obtaining diaphragm 13 with relatively stable vibrations. For example, according to the table above and Figure 10, when the thickness of diaphragm 13 is relatively large, the elastic coefficient of diaphragm 13 can vary significantly with displacement, and the nonlinearity of diaphragm 13 can be significant; when the thickness of diaphragm 13 is small, the elastic coefficient of diaphragm 13 can be relatively stable, and the nonlinearity may not be significant. Therefore, in some modalities, the thickness of diaphragm 13 can be less than or equal to 0.2 mm. In some modalities, the thickness of diaphragm 13 can be less than or equal to 0.1 mm. In some modalities, the elastic deformation of the diaphragm 13...Diaphragm 13 can occur mainly in the fold portion 133. In such cases, in some modalities, the thickness of the fold portion 133 can be less than the thickness of other parts of the diaphragm 13. Consequently, the thickness of the fold portion 133 can be less than or equal to 0.2 mm. In some modalities, the thickness of the fold portion 133 can be less than or equal to 0.1 mm. As another example, according to the table above and Figure 10, when the direction of the fold portion 133 is concave, the elastic coefficient of the diaphragm 13 can be relatively stable. In such cases, in some modalities, the direction of the fold part 133 may be concave. In some modalities, other parameters of the diaphragm 13 may also be determined based at least in part on the nonlinearity of the diaphragm 13, such as a fixed region width, a fold width, a half-depth width, a fold radius, or the sill. Figure 11 is a schematic diagram illustrating the cross-section of an exemplary structure of the 'diaphragm 13' in Figure 4 according to some embodiments of the present exposition. As shown in Figure 11, in some embodiments, the concave region 135 may have a first depth H in the vibration direction of a transducer 12; in the direction perpendicular to the vibration direction of the transducer 12, the concave region 135 may have a half-depth width W1, and a first separation distance W2 is found between the first connecting part 132 and the second connecting part 134. The half-depth width W2 may refer to a width of the concave region 135 at a depth of 1 / 2 H. In some embodiments, W1 and W2 may satisfy the following relationship: 0.2SW1 / W2S0.6, which can not only ensure a RCb / nn / eznz / E / YiAi -39 size of a deformable region of the fold part 133, but also avoid structural interference between the fold part 133 and the first connecting part 132 and / or the housing 11. In some embodiments, W1 and W2 can satisfy the following relationship: 0.3=W1 / W2 =0.5. In some embodiments, H and W2 can satisfy the following relationship: 0.2 t H / W2 d 1.4, which can not only ensure the size of a deformable region of the fold part 133, making the fold part 133 sufficiently smooth, but also avoid structural interference between the fold part 133 and the first connecting part 132 and / or the housing 11, and further prevent the fold part 133 from being 'difficult' to vibrate due to excessive weight. In some modes, H and W2 can satisfy the following relation: 0.4SH / W2Ó1.2. In some modes, H and W2 can satisfy the following relation: 0.oEH / W2E1.In some modalities, H and W2 can satisfy the following relationship: 0.8^H / W2^9. In some embodiments, the fold portion 133 may include a first transition segment 1331, a second transition segment 1332, a third transition segment 1333, a fourth transition segment 1334, and a fifth transition segment 1335. One end of the first transition segment 1331 and one end of the second transition segment 1332 may be connected to the first connecting portion 132 and the second connecting portion 134, respectively, and extend towards each other. One end of the third transition segment 1333 and one end of the fourth transition segment 1334 may be connected to the other end of the first transition segment 1331 and to the other end of the second transition segment 1332, respectively. Two ends of the fifth transition segment 1335 may be connected to the other end of the third transition segment 1333 and to the other end of the fourth transition segment 1334, respectively. Then, the transitional seyentos p.They can be enclosed together to form the concave region 135. In some embodiments, in the direction from a connection point (e.g., a point 7A) between the first transition segment 1331 and the first connecting part 132 to a reference position point of the fold part 133 away from the first connecting part 132 (i.e., a vertex of the fold part 133, e.g., a point 7C), an angle; included between a tangent line (e.g., a dashed line TL1) on one side of the first transition segment 1331 facing the concave region 135 and the vibration direction of the transducer 12 can gradually decrease; in the direction from a connection point (e.g., a point 7B) between the second segment. RCb / nn / eznz / E / YiAi -40 of transition 1332 and the second part of connection 134 to the reference position point, an angle included between a tangent line (e.g., a dotted line TL2) on one side of the second transition segment 1332 oriented towards the concave region 135 and the 'transducer vibration direction 12' may gradually decrease. In such cases, the concave region 135 may sink into the second cavity 112A. In some modalities, an angle included between a tangent line (e.g., a dotted line TL3) on one side of the third transition segment 1333 oriented towards the concave region 135 and the 'transducer vibration direction 12' may remain constant or gradually increase; an angle included between the tangent line (e.g., a dotted line TL4) on one side of the fourth transition segment 1334 - which is oriented towards the concave region 135 and the 'transducer vibration direction 12 can remain constant or gradually increase.The fifth transition segment 1335 can have an arc shape. In some modalities, the fifth transition segment 1335 may be in the form of an arc (e.g., a circular arc), and the arc radius may be greater than or equal to 0.2 mm. In some modalities, the arc radius may be in the range of 0.2–0.5 mm. In some modalities, the arc radius may be in the range of 0.3–0.4 mm. In some modalities, with reference to (a) or (b) in Figure 8, the angle included between the tangent line of the side of the third transition segment 1333 that faces the concave region 135 and the vibration direction of the transducer 12 may be zero; the angle included between the tangent line of the side of the fourth transition segment 1334 that faces the concave region 135 and the vibration direction of the transducer 12 may be zero. In such cases, an arc radius of the fifth transition segment 1335 can be equal to half the half-depth width W1 of the concave region 135.With reference to (c) or (d) in Figure 8, the angle included between the tangent line on the side of the third transition segment 1333 that faces the concave region 135 and the vibration direction of the transducer 12 may be zero; the angle included between the tangent line on the side of the fourth transition segment 1334 that faces the concave region 135 and the vibration direction of the transducer 12 may be a fixed value greater than zero. In such cases, the fourth transition segment 1334 may be tangent to the fourth transition segment 1335. In some modalities, the first transition segment 1331 and the second transition segment 1332 may respectively have an arc shape. In RCb / nn / eznz / E / YiAi In some modalities, the arc radius R1 of the first transition segment 1331 may be greater than or equal to 0.2 mm, and the arc radius R2 of the second transition segment 1332 may be greater than or equal to 0.2 mm, which may prevent excessive local flexing of the fold portion 133, thereby increasing the reliability of the diaphragm 13. In some modalities, the arc radius R1 may be in the range of 0.2 mm–0.4 mm. In some modalities, the arc radius R1 may be in the range of 0.2 mm–0.25 mm. In some modalities, the arc radius R2 may be in the range of 0.2 mm–0.4 mm. In some modalities, the arc radius R2 may be in the range of 0.2 mm–0.25 mm. In some modes, the first transition segment 1331 may include an arc segment and a flat segment connected to each other.The arc segment of the first transition segment 1331 can be connected to the third transition segment 1333, and the flat segment of the first transition segment 1331 can be connected to the first connection bridge 132; the second transition segment 1332 can be similar to the first transition segment 1331. In some modalities, a projection of a length of the first transition segment 1331 in the vertical direction of the vibration direction of the transducer 12 can be defined as the first projection length W3, a projection of a length of the second transition segment 1332 in the vertical direction can be defined as the second projection length W4, and a projection of a length of the fifth transition segment 1335 in the vertical direction can be defined as the third projection length W5, wherein W3, W4 and W5 can satisfy the following relation: 0.43 (W3+W4) / W5 32.5. In some modalities, W3, W4 and W5 can satisfy the following relation: 0.5< (W3+W4) / W5<2.2. In some modalities, W3, W4 and W5 can satisfy the following relation: 0.83(W3+W4) / W532. In some modalities, W3, W4 and W5 can satisfy the following relationship: 1^ (W3+W4 ) / W5^1.5. According to the description above and Figure 11, in some modes, the thickness of diaphragm 13 can be 0.1 rrm. In some modes, W2 > 0.9 rrm. In some modes, 0.9 rrm ≤ W2 ≤ 1.7 rrm. In some modes, 1.1 rrm ≤ W2 ≤ 1.5 πη. In some modes, 1.2 rrm ≤ W2 ≤ 1.4 πη. In some modes, 0.3 rrm ≤ H ≤ 1.0 mm. In some modes, 0.5 rrm ≤ H ≤ 0.9 rrm. In some modes, 0.6 rrm ≤ H ≤ 0.8 mm. In some modes, W3 + W4 ≤ 0.3 rrm. Furthermore, in some modes, when 0.3 rrm 3 W3 + W4 3 1.0 rrm, W1 or W5 ¿ 0.4 mm. In some modes, when 0.4 mm 3 W3 + H4 < 0.7 mm, W1 or W5 3 0.5 mm. In RCb / nn / eznz / E / YiAi -42 a specific modality, W1 or W5 = 0.4 mm, W3 = 0.4 2 mm, W4 = 0.45 ητη, H = 0.55 mm. With reference to Figure 11 and Figure 7, in some embodiments, in the vibration direction of the transducer 12, the distance from the connection point (e.g., point 7A) between the fold portion 133 and the first connection portion 132 to the outer end surface of the magnetic circuit assembly 122 away from a first cavity 111 can be defined as the first distance di, and the distance from the central region of an elastic member 124 to the outer end surface of the magnetic circuit assembly 122 away from the first cavity 111 can be defined as the second distance d2, where di and d2 can satisfy the following relationship: 0.3S-dl / d2S0.8. In some embodiments, di and d2 can satisfy the following relationship: 0.4á-dl / d2á0.7 . In some modalities, di and d2 can satisfy the following relationship: 0.5^-dl / d2^0.6.In such cases, since the distance d2 can be determined, the distance di can be adjusted based on the distance d2 to adjust a specific position where the folding part 133 connects to the first connecting part 132. In some embodiments, the distance from the center of gravity (e.g., a point G) of the magnet 1222 to the surface of the outer end of the magnetic circuit installation 122 away from the first cavity 111 can be defined as the third distance d3, where di and d3 can satisfy the following relationship: 0.7 <dl / -d3d2 . En algunas modalidades, di y d3 p-ue-den satisfacer la siguiente relación: l<-dl / -d3ál. 6. En algunas modalidades, el y d3 pueden satisfacer la siguiente relación: 1.3é-dl / -d3él .5. ya que puede -determinarse la -distancia d3, el tamaño -de la -.The distance -di can be adjusted based on the distance -d3 to adjust the specific position where the folding part 133 connects to the first connecting part 132. In such cases, one end of the magnetic circuit installation 122 can be connected to the housing 11 via the elastic member 124 and the audio coil support 121, and the other end of the magnetic circuit installation 122 can be connected to the housing 11 via the diaphragm 13, i.e., the elastic member 124 and the diaphragm 13 can respectively fix the two ends of the magnetic circuit installation 122 to the housing 11 in the vibration direction of the transducer 12 in such a way that the stability of the magnetic circuit installation 122 can be meje-rar significantly. In some modalities, the first distance can be greater than the third RCb / nn / eznz / E / YiAi -43 distance (i.e., dl¿d3), and in the vibration direction of the transducer 12, with reference to Figure 4, the acoustic opening 113 may be at least partially located between the connection point (e.g., point 7B) and the outer end surface, which not only increases the stability of the magnetic circuit component 122 as much as possible, but also reserves sufficient space for the second cavity 112A to improve the acoustic performance of the core modules 10, and further provides sufficient design space for the position and size of the acoustic opening 113 in the housing 11 to facilitate flexible adjustment of the acoustic opening 113. In some embodiments, the first distance may be less than the third distance (i.e., dl <d3), el centro de gravedad (e.g., point G) of the magnet 1222 can be between the elastic member 124 and the diaphragm, thus improving the stability of the magnetic circuit installation 122. According to the above descriptions and Figure 7, taking as a reference the surface of the lower plate 1223 away from the side plate 1224, the distance di can also be considered as the distance between the second connecting part 134 and the lower plate 1223, the distance d2 can also be considered as the distance between the elastic component 124 and the lower plate 1223, and the distance d3 can also be considered as the distance between the center of gravity of the magnet 1222 and the lower plate 1223. In one embodiment, dl=2.85 mm, d2=4.63 mm, -33=1.78 mm. In some embodiments, the distance between the projections of the connection point (e.g., point 7A) between the first connection part 132 and the fold part 133 and the connection point (e.g., point 7B) between the second connection part 134 and the fold part 133 in the vibration direction of the transducer 12 can be defined as the first projection distance d4, where d4 and W2 can satisfy the following relationship: 00-34 / 71201.8. In some embodiments, 34 and 712 can satisfy the following relationship: 0.50-34 / 712<1.5. In some embodiments, d4 and 712 can satisfy the following relationship: 0.8 <d4 / W2<l.2. Por consiguiente, puede ajustarse la posición específica en donde la parte de pliegue 133 se conecta a la primera parte -de conexión 132. En algunas modalidades, con referencia a (a) o (c) en la Figura 8, la proyección -del punte -de conexión entro la p.-rimera p.-artc -do connection 132 and the part- of p-licguc 133 and the projection of the connection point between the second connection part 134 and the fold part 133 in the vibration direction of the transducer 12 p-ueden coincio.ir,. RCbjnn / eznz / E / YiAi -44i.e., d4=0. In some modalities, with reference to ib) or (d) in Figure 8, the projection of the connection point (e.g., point 7A) between the first connection part 132 and the fold part 133 and the projection of the connection point (e.g., point 7B) between the second connection part 134 and the fold part 133 in the vibration direction of the transducer 12 may be separated, i.e., d4>0. It should be noted that the above description of diaphragm 13 is provided for illustrative purposes only and is not intended to limit the scope of this discussion. Skilled practitioners may make various variations and modifications based on the description in this discussion. However, these alterations and modifications do not depart from the scope of this discussion. For example, diaphragm 13 may also be located between the lower surface of the bone conduction acoustic installation 221 (or the transducer 12) and the lower surface of the housing 11. As another example, the aerotympanic conduction acoustic installation 222 may include a first diaphragm and a second diaphragm. The first diaphragm may be similar to diaphragm 13. The second diaphragm may be connected to the housing 11 and vibrate with the vibration of the housing 11.As another example, the aerotympanic conduction acoustic installation 222 may include a diaphragm and a vibration transmission component. The vibration transmission component may connect the bone conduction acoustic installation 221 and the diaphragm. The vibration transmission component may be configured to transmit vibrations from the bone conduction acoustic installation 221 to the diaphragm to generate aerotympanic conduction sound waves. Figure 12 is a schematic diagram illustrating the cross-section of an exemplary diagram according to some modalities of the present exposition. As shown in Figure 12, the diaphragm 1200 may include a first connecting part 1210, a fold portion 1220, and a second connecting part 1230. In some embodiments, the second connecting part 1230 may be level with the upper portion of the first connecting part 1210. In some embodiments, the second connecting part 1230 may not be level with the upper portion of the first connecting part 1210. The fold portion 1220 may be recessed into a second cavity (i.e., the direction of the lower plate of the first connecting part 1210). In some embodiments, the elastic coefficient of the diaphragm 1200 may be adjusted by adjusting the RCb / nn / eznz / E / YiAi -45 Rustic characteristics of the -diaphragm-gma 1200. For example, the elastic coefficient of the -diaphragm-gma 1200 can be adjusted by adjusting the height -of the first connection part 1210, the height -of the second connection part 1230 in relation to the first connection part 1210, the height -of the fold part 1220, the thickness -of the first connection part 1210 and / or the thickness -of the second connection part 1230, etc. For example, the greater the height -of the fold part 1220, the smaller the thickness -of the second connection part 1230, and the larger the fold part 1220, the greater the elastic coefficient -of the -diaphragm-gma 1200. Figure 13 is a schematic diagram illustrating the cross-section of an exemplary diaphragm according to some embodiments of the present exposition. A diaphragm 1300 in Figure 13 may be similar to the diaphragm 1200 in Figure 12. For example, the diaphragm 1300 may include a first connection portion 1310, a fold portion 1320, and a second connection portion 1330. Unlike the diaphragm 1200, the fold portion 1320 may project into a first cavity (i.e., the direction opposite the bottom plate of the first connection 1310). In some embodiments, the elastic coefficient of the diaphragm 1300 may be adjusted by adjusting the characteristics of the diaphragm 1300.For example, the elastic coefficient of diaphragm 1300 can be adjusted by adjusting the height of the first connection 1310, the height of the second connection 1330 with respect to the first connection part 1310, the height of the p-bend part 1320, the thickness of the first connection part 1310 and / or the thickness of the second connection part 1330, etc. For example, the greater the height of the p-bend part 1320, the smaller the thickness of the second connection part 1330, and the greater the p-bend part 1320, the greater the elastic coefficient of diaphragm 1300. Comparing the -.diafra-gma 1200 in Figure 12 and the -.diafra-gma 1300 in Figure 13, when the diafra-gma 1200 and the -diafra-gma 1300 include the same material, the diafra-gma 1200 may have a smaller elastic coefficient and a lower resonant frequency. Therefore, opt for the diaphragm 1300. In some modalities, the diaphragm 1200 (e.g., the pleated part 1220) and / or the diaphragm 1300 (e.g., the pleated part 1320) may include through-holes (not shown). The first cavity 111 and the second cavity 112A of the acoustic output apparatus may communicate through the through-holes. In some modalities, the phases of the sounds generated at both ends of the through-holes may be opposite, and the sounds at both ends of the RCb / nn / eznz / E / YiAi -46 through holes can be canceled out from each other in such a way that the sound leakage (e.g., the filtered sound from relief hole 144) generated by the acoustic output apparatus can be effectively reduced and the acoustic performance of the acoustic output apparatus can be improved. Figure 14 is a schematic diagram illustrating an acoustic output apparatus according to some embodiments of the present disclosure. As shown in Figure 14, the acoustic output apparatus 1400 may include a bone conduction acoustic installation 1410, a housing 1420, and an air-tympanic conduction acoustic installation. The bone conduction acoustic installation 1410 and the air-tympanic conduction acoustic installation may be housed together in a housing chamber of the housing 1420. The bone conduction acoustic installation 1410 may include a magnetic circuit installation 1411, one or more vibrating plates 1412, and an audio coil 1413. The magnetic circuit installation 1411 may include one or more magnetic elements and / or magnetic conduction elements, which may be configured to generate a magnetic field. The audio coil 1413 may be disposed in a magnetic space of the magnetic circuit installation 1411.At least one of the one or more vibrating plates 1412 may be physically connected to the housing 1420. The housing 1420 may be in contact with a user's skin (e.g., the skin of the user's head) and transmit bone conduction sound waves to the cochlea. The aerotympanic conduction acoustic installation may include a diaphragm 1431. The diaphragm 1431 may be physically connected to the bone conduction acoustic installation 1410 and / or the housing 1420. For example, as shown in Figure 14, the diaphragm 1431 may be located between the lower surface of the bone conduction acoustic installation 1410 and the lower surface of the housing 1420, and separate the housing chamber into a first cavity 1423 and a second cavity 1424. When the bone conduction acoustic installation 1410 (e.g., one or more vibrating plates) vibrates to generate bone conduction sound waves, the vibrations of the bone conduction acoustic installation 1410 can drive the housing 1420 and / or the diaphragm 1431 physically connected to the bone conduction acoustic installation 1410 and / or the housing 1420 to vibrate. The vibration of the diaphragm 1431 can cause the air in the housing 1420 to vibrate, thus generating aerotympanic conduction sound waves. These aerotympanic conduction sound waves can be transmitted to the outside of the housing 1420 through an acoustic opening 1421. The sound waves of RCb / nn / eznz / E / YiAi -47 Aerotympanic conduction and bone conduction sound waves can represent the same audio signal. In some modalities, aerotympanic conduction sound waves and bone conduction sound waves representing the same audio signal may refer to aerotympanic conduction sound waves and bone conduction sound waves representing the same voice content, which may consist of frequency components of aerotympanic conduction sound waves and bone conduction sound waves. The frequency components of aerotympanic conduction sound waves and bone conduction sound waves may be different. For example, bone conduction sound waves may include more low-frequency components, and aerotympanic conduction sound waves may include more high-frequency components. In some modalities, air-tympanic conduction sound waves and bone-conduction sound waves may have the same phase; that is, the phase difference between air-tympanic conduction sound waves and bone-conduction sound waves may be zero. In some modalities, the phase difference between air-tympanic conduction sound waves and bone-conduction sound waves may be less than a threshold, such as π, 2π / 3, π / 2, or similar. The phase difference may refer to an absolute value of the phase difference between bone-conduction sound waves and air-tympanic conduction sound waves. In some modalities, different frequency ranges of air-tympanic conduction sound waves and bone-conduction sound waves may correspond to different phase differences and different frequencies.For example, in a frequency range below 300 Hz, the phase difference between air-tympanic conduction sound waves and bone conduction sound waves can be less than π. As another example, in a frequency range below 1000 Hz (e.g., 300 Hz–1000 Hz), the phase difference between air-tympanic conduction sound waves and bone conduction sound waves can be less than 2π / 3. As yet another example, in a frequency range below 3000 Hz (e.g., 1000 Hz–3000 Hz), the phase difference between air-tympanic conduction sound waves and bone conduction sound waves can be less than π / 2. In such cases, the synchronization of bone conduction sound waves and air-tympanic conduction sound waves can be increased, thereby increasing the overlap between the bone conduction and air-tympanic conduction sound waves, which can improve the auditory effect. RCb / nn / eznz / E / YiAi -48 In some modalities, the 'time difference between aerotympanic conduction sound waves and bone conduction sound waves received by a user may be less than a threshold, e.g., 0.1 seconds. In some embodiments, the housing 1420 may include a relief orifice 1422. For example, the relief orifice 1422 may be arranged in the side wall of a first portion of the housing 1420. A first cavity 1423 may be in flow communication with the outside of the acoustic outlet apparatus 1400 through the relief orifice 1422. As another example, the relief orifice 1422 and the acoustic opening 1421 may be arranged in different side walls of the housing 1420. Alternatively, the relief orifice 1422 and the acoustic opening 1421 may be arranged in side walls of the housing 1420 that are not adjacent (e.g., parallel to each other). In some modalities, the output characteristics of the bone conduction acoustic waves can be adjusted by adjusting the stiffness (e.g., structural dimension, elastic modulus of material, etc.) of the bone conduction acoustic installation 1410 (e.g., the vibrating plate) and / or the housing 1420. In some embodiments, the output characteristics of the aerotympanic conduction sound waves can be adjusted by adjusting the shape, elastic coefficient, and damping of the diaphragm 1431. The output characteristics of the aerotympanic conduction sound waves can also be adjusted by adjusting a cut, position, size, and / or shape of at least one of the acoustic openings 1421 and / or the relief hole 1422. For example, a damping structure (e.g., a tuning net) can be arranged in the acoustic opening 1421 to implement an acoustic effect of the aerotympanic conduction acoustic installation. Figure 15 is a schematic diagram illustrating an acoustic output apparatus according to some modalities of the present exposition. The acoustic output apparatus 1500 may be identical or similar to the acoustic output apparatus 1400 of Figure 14. For example, the acoustic output apparatus 1500 may include a bone conduction acoustic installation 1510, a housing 1520, and an air-tympanic conduction acoustic installation. The bone conduction acoustic installation 1510 and the air-tympanic conduction acoustic installation may be housed in the housing 1520. The air-tympanic conduction acoustic installation may include a diaphragm 1531 connected to the housing 1520 and / or to the air-tympanic conduction acoustic installation 1510. As another example, an acoustic opening 1521 and RCb / nn / eznz / E / YiAi -49 A sound guide channel 1540 can be arranged in the side wall of the housing 1520. The acoustic opening 1521 and the sound guide channel 1540 can be in flow communication with a second cavity 1524. As another example, a relief hole 1522 can be arranged in the side wall of the housing 1520. As shown in Figure 15, unlike the acoustic output device 1400, the diaphragm 1531 can surround the bone conduction acoustic installation 1510 (e.g., a magnetic circuit installation of the bone conduction acoustic installation 1510). The diaphragm 1531 can be a plate or a sheet that is ring-shaped. In some modalities, the diaphragm 1531 can be concave or convex to increase the elasticity of the diaphragm 1531 and improve the frequency response in a low-mid frequency range. For example, the inner side of the diaphragm 1531 can be physically connected to the outer wall of the bone conduction acoustic installation 1510, and the outer side of the diaphragm 1531 can be physically connected to the inner wall of the housing 1520. By surrounding the bone conduction acoustic installation 1510, the space occupied by the diaphragm 1531 can be reduced, thereby reducing the volume of the acoustic output apparatus 1500.By reducing the volume and adjusting the position of diaphragm 1531 in housing 1520, the volume and / or weight of acoustic output apparatus 1500 can be effectively reduced. Figure 16 is a schematic diagram illustrating an acoustic output apparatus according to some modalities of the present exposition. In some modalities, the acoustic output apparatus 1600 may be the same as, or similar to, the acoustic output apparatus 1400 in Figure 14. In some modalities, as shown in Figure 16, the aerotympanic conduction acoustic installation may include at least two diaphragms, such as a first diaphragm 1631 and a second diaphragm 1633. The first diaphragm and / or the second diaphragm may be the same as, or similar to, diaphragm 13. In some modalities, the first diaphragm 1631 and the second diaphragm 1633 may be arranged approximately in parallel.The first diaphragm 1631 can be connected to the bone conduction acoustic installation 1610 and / or the housing 1620, and the second diaphragm 1633 can be connected to the housing 1620 in such a way that the first diaphragm can receive vibrations from the bone conduction acoustic installation 1610 and / or the housing 1620, and the second diaphragm can receive vibrations from the housing 1620. In some forms, the second diaphragm 1633 can be placed between the RCbjnn / eznz / E / YiAi -50lower surface of the housing 1620 and the lower surface of the bone conduction acoustic installation 1610. In some modalities, the second diaphragm 1633 may be disposed between the lower surface of the housing 1620 and a plane in which the acoustic aperture 1621 is located in the direction parallel to the first diaphragm 1631. In some modalities, the second diaphragm 1633 may be disposed near C; on the lower surface of the housing 1620. The second diaphragm 1633 may be physically connected to the housing 1620. In some embodiments, the second diaphragm 1633 may include a main part and an auxiliary part. The main part may be close to or physically connected to the lower surface of the housing 1620, and the auxiliary part may be ring-shaped and surround the main part. In some embodiments, the second diaphragm 1633 may be the same as, or similar to, the diaphragm 13 in the preceding embodiments. For example, the main part may be the same as, or similar to, the first connecting part 132 of the diaphragm 13, and the auxiliary part may be the same as, or similar to, the pleated part 133 and the second connecting part 134 of the diaphragm 13. In some embodiments, the auxiliary part may also be physically connected to the housing 1620. In some embodiments, the main part may include a massive block, and the auxiliary part may include a spring. In some models, the resonant frequency of the lower surface of the 1620 housing can be determined based on the material of the lower surface. In some models, the material and thickness of the lower surface of the 1620 housing can affect the resonant frequency of the lower surface of the 1620 housing. For example, if the material of the lower surface of the 1620 housing is relatively soft, the resonant frequency of the lower surface of the 1620 housing may be relatively high. Conversely, if the material of the lower surface of the 1620 housing is relatively hard, the resonant frequency of the lower surface of the 1620 housing may be less than or equal to a threshold, e.g., less than or equal to 10 kHz, less than or equal to 5 kHz, or less than or equal to 1 kHz, etc., by adjusting the hardness of the material on the lower surface of the housing 1620. In some modalities, the resonant frequency of the lower surface of the housing 1620 can be determined based on the second diaphragm 1633. RCb / nn / eznz / E / YiAi -51 For example, the resonant frequency of the lower surface of the housing 1620 can be equal to the resonant frequency of the second diaphragm 1633. In some modalities, the resonant frequency of the second diaphragm 1633 may exceed the vibration frequency of a structure comprising the bone conduction acoustic insulation 1610 and the first diaphragm 1631. When the vibration frequency of the bone conduction acoustic insulation 1610 is lower than the resonant frequency of the second diaphragm 1633, the vibration of the second diaphragm 1633 may be consistent with the vibration of the housing 1620. In other words, the vibration phase and frequency of the second diaphragm 1633 may be consistent with the vibration phase and frequency of the housing 1620, respectively. The vibration of the second diaphragm 1633 may be opposite to the vibration of the first diaphragm 1631. When the frequency of the structure comprising the bone conduction acoustic insulation 1610 and the first diaphragm 1631 is lower than the resonant frequency of the second diaphragm, the vibration of the second diaphragm 1633 may be opposite to the vibration of the first diaphragm 1631.diaphragm 1633, the air in the second cavity 1624 can be compressed or expanded, and air-tympanic conduction sound waves can form due to the compression or expansion of the air in the second cavity 1624. In some embodiments, when the upper surface of the housing 1620 where the vibrating plate 1612 is located vibrates and presses against the face due to the vibration of the vibrating plate 1612, the upper surface of the housing 1620 can generate a sound leak. A phase of the sound leakage generated by the upper surface of the housing 1620 may be opposite to a phase of the sound leakage generated by the vibration of the second diaphragm 1633. The sound leakage generated by the vibration of the second diaphragm 1633 and the sound leakage generated by the upper surface of the housing 1620 may cancel each other out in such a way that the sound leakage from the acoustic output apparatus 1600 may be suppressed or reduced.In some modalities, when the vibration frequency of the bone conduction acoustic installation 1610 is greater than the resonance frequency of the second diaphragm, the vibration amplitude of the second diaphragm 16.33 with respect to the housing 1620 may be very small, the vibration amplitude of the air driven by the second diaphragm 1633 may be very small, and therefore the sound leakage produced by the second diaphragm 1633 may also be very small. Figure 17 is a schematic diagram illustrating an acoustic output device according to some of the modalities of the present exposition. An acoustic output device 1700 may be the same as, or similar to, the acoustic output device. RCb / nn / eznz / E / YiAi -521400 of Figure 14. As shown in Figure 17, unlike the acoustic output apparatus 1400, the diaphragm 1731 can be separated from a bone conduction acoustic installation 1710, and the diaphragm 1731 can be physically connected to the housing 1720. When the bone conduction acoustic installation 1710 generates bone conduction sound waves, the vibrations of the bone conduction acoustic installation 1710 can cause the housing 1720 to vibrate, thereby driving the diaphragm 1731 to vibrate. When diaphragm 1731 has a relatively small resonant peak (e.g., diaphragm 1731 is made of a soft material, or diaphragm 1731 has a pleated structure configured to reduce its stiffness), diaphragm 1731 may have a better response to low-frequency vibrations generated by housing 1720. In other words, diaphragm 1731 mayto produce a sound of a low frequency, thus increasing the volume of aerotympanic conduction sound waves at a low frequency. Figure 18 is a 'schematic diagram illustrating an acoustic output apparatus according to some modalities of the present exposition. In some embodiments, an apparatus of acoustic output 1800 may be the same as, or similar to, the apparatus of acoustic output 1600 in Figure 16. As shown in Figure 18, unlike the apparatus of acoustic output 1600, a second diaphragm 1833 may be disposed in a second cavity 1824 separate from the lower surface of the housing 1820. In some embodiments, the second diaphragm 1833 may be disposed between a first diaphragm 1831 and a plane where an acoustic opening 1821 is located in the direction parallel to the first diaphragm 1831. In some embodiments, the second diaphragm 1833 may be parallel to the first diaphragm 1831. In some embodiments, the second diaphragm 1833 may be inclined with respect to the first diaphragm 1831. In some embodiments, the second diaphragm 1833 can separate the second cavity 1824 into a first sub-cavity and a second sub-cavity. The first sub-cavity can be defined by the second diaphragm 1833 and the first diaphragm 1831, and the second sub-cavity can be defined by the second diaphragm 1833 and the lower surface of the housing 1820. In some modalities, since the bone conduction acoustic installation 1810 and the first diaphragm 1831 may be relatively fixed, vibrations of the housing 1820 caused by vibrations of the bone conduction acoustic installation 1810 can cause a pressure change in the first sub-cavity between the first RCb / nn / eznz / E / YiAi -53 diaphragm 1831 and the second diaphragm 1833. The pressure change in the first sub-cavity can cause the air in the first sub-cavity to vibrate. The vibrations of the air in the first sub-cavity can cause the second diaphragm 1833 to vibrate. The vibrations of the second diaphragm 1833 can cause the air in the second sub-cavity to vibrate, and the vibrations of the housing 1820 can also cause the air in the second sub-cavity to vibrate. A phase of the air vibrations caused by the vibrations of the second diaphragm 1833 and a phase of the air vibrations caused by the vibration of the casing 1820 can be the same in such a way that the volume of the aerothyrpanic conduction sound waves guided by an acoustic opening 1821 can be increased. In some modalities, vibrations of the housing 1820 caused by vibrations of the bone conduction acoustic installation 1810 can cause the first diaphragm 1831 to vibrate. Vibrations of the first diaphragm 1831 and / or the housing 1820 can facilitate air vibrations between the first diaphragm 1831 and the second diaphragm 1833. Air vibrations between the first diaphragm 1831 and the second diaphragm 1833 and vibrations of the housing 1820 can cause the second diaphragm 1833 to vibrate. When the second diaphragm 1833 has a relatively small resonance peak (e.g.The second diaphragm 1833 is made of a soft material, or the second diaphragm 1833 has a folded structure configured to reduce the rigidity of the second diaphragm 1833. The second diaphragm 1833 may have a better response to air vibrations between the first diaphragm 1831 and the second diaphragm 1833 caused by low-frequency vibrations generated by the bone conduction acoustic installation 1810. In other words, the second diaphragm 1833 may provide more low-frequency sound, thereby increasing the volume of low-frequency aerothyrionic conduction sound waves. The acoustic output apparatus 1800 may provide rich sound (e.g., more low-frequency sound), which may increase the volume of aerothyrionic conduction sound waves. Figure 19 is a schematic diagram illustrating an acoustic output apparatus according to some of the modalities of the present exposition. In some modalities, an acoustic output apparatus 1900 may be the same as, or very similar to, the acoustic output apparatus 1400 in Figure 14. As shown in Figure 19, unlike the acoustic output apparatus 1400, the acoustic installation of RCb / nn / eznz / E / YiAi -54 Aerotympanic conduction may include a diaphragm 1933 and a vibration transmission component 1931. The vibration transmission component 1931 may be physically connected to the bone conduction acoustic installation 1910, the diaphragm 1933 and / or the housing 1920. The vibration transmission component 1931 may be configured to transmit vibrations from the bone conduction acoustic installation 1910 and / or the housing 1920 to the diaphragm 1933 to generate aerotympanic conduction sound waves. During vibration transmission, the vibration transmission component 1931 can change the vibration direction of the bone conduction acoustic installation 1910 and / or the housing 1920. In other words, the vibration direction of the diaphragm 1933 can be different from the vibration direction of the bone conduction acoustic installation 1910 and / or the housing 1920. In some embodiments, the diaphragm 1933 can be located in an acoustic opening 1921. The diaphragm 1933 can be connected to the bone conduction acoustic installation 1910 via the vibration transmission component 1931. The bone conduction acoustic installation 1910 can be connected to the housing 1920 via the vibration transmission component 1931. In some embodiments, the vibration transmission component 1931 can include a plurality of connecting rods. In some modalities, one of the plurality of connecting rods may be physically connected to the diaphragm 1933, and one of the plurality of connecting rods may be physically connected to the acoustic bone conduction installation 1910. In some modalities, one of the plurality of connecting rods may be physically connected to the housing 1920.In some forms, the plurality of connecting rods can be physically connected to each other. In some modalities, when vibrations are transmitted from the housing 1920 and / or the bone conduction acoustic installation 1910, the vibration transmission component 1931 can change the direction of vibration and transmit the vibrations from the housing 1920 with the changed vibration direction to the diaphragm 1933. As shown in Figure 19, the housing 1920 can vibrate in the left and right directions relative to the bone conduction acoustic installation 1910, thereby generating bone conduction sound waves. The housing 1920 can transmit the vibrations from the bone conduction acoustic installation 1910 to the cochlea through the upper surface of the housing 1920 and through human bone. The component RCb / nn / eznz / E / YiAi The vibration transmission element 1931 can convert the left and right direction of the housing 1920 into upward and downward vibrations, and transmit the vibrations to the diaphragm 1933 in such a way that the diaphragm 1933 can vibrate upward and downward to generate the air-tympanic conduction sound waves. In some embodiments, the acoustic aperture 1921 can be oriented directly toward the human ears, i.e., the diaphragm 1933 can vibrate toward the human ears. Figure 20 is a schematic diagram illustrating an acoustic output device according to some embodiments of the present disclosure. In some embodiments, an acoustic output device 2000 may be the same as, or similar to, the acoustic output device 1400 in Figure 14. As shown in Figure 20, unlike the acoustic output device 1400, the acoustic output device 2000 may further include an elastic member 2050 disposed between the bone conduction acoustic installation 2010 and the housing 2020. In some embodiments, the elastic member 2050 may be located in a first cavity 2023, and the elastic member 2050 may be physically connected to the bone conduction acoustic installation 2010 (e.g., a magnetic circuit installation 2011) and to the housing 2020.In some modalities, the elastic member 2050 can fix the magnetic circuit installation 2011 more effectively and prevent the magnetic circuit installation 2011 from flipping when the housing 2020 vibrates, thus improving the sound quality of the acoustic output apparatus 2000. In some embodiments, the elastic member 2050 may have a specific resonant frequency, and this resonant frequency may provide a resonant peak for the vibrations of the housing 2020. In such cases, the bone conduction sound waves generated by the bone conduction acoustic installation 2010 may have a higher volume near the resonant peak of the elastic member 2050. In some embodiments, the output characteristics of the bone conduction sound waves may be adjusted by adjusting one or more characteristics (e.g., the size, the elastic modulus of a material, etc.) of a diaphragm 2031 and an elastic coefficient of the elastic member 2050. It should be noted that the elastic member 2050 in this embodiment is not limited to the scope of this exhibition and may also apply to the acoustic output apparatus in other figures of this exhibition. The possible beneficial effects of the modalities of the present exposure may include, but are not limited to: (1) the diaphragm arranged between the RCb / nn / eznz / E / YiAi (5) The transducer and housing can enable the acoustic output device to generate bone conduction sound and aerotympanic conduction sound, thereby improving the acoustic performance of the acoustic output device; (2) the diaphragm's fold portion can improve the diaphragm's deformation capacity in the transducer's vibration direction, thereby reducing the diaphragm's influence on the transducer's vibrations; (3) the reinforcing member, which has greater rigidity than the diaphragm, can be arranged on the edge of the diaphragm in such a way that the diaphragm can be connected to the housing via the reinforcing member, thereby increasing the reliability of the connection between the diaphragm and the reinforcing member; and (4) the two ends of the transducer are respectively connected to the housing via the elastic sheet and the diaphragm, which can increase the stability of the transducer. Having thus described the basic concepts, it may be quite evident to those skilled in the art after reading this detailed description that the foregoing detailed description is proposed to be presented only by way of example and is not limiting. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and amendments to this exposition. These modifications, improvements, and amendments are merely suggested by this exposition and are within the spirit and scope of the exemplary modalities herein. Meanwhile, this exposition uses specific terms to describe the modalities of this exposition. For example, a modality, the modality, and / or some modalities refer to a certain feature, structure, or characteristic related to at least one modality of this exposition. Therefore, it should be emphasized and pointed out that references to a modality, the modality, or an alternative modality two or more times in different places in this exposition do not necessarily refer to the same modality. Furthermore, certain features, structures, or characteristics in one or more modalities of this exposition may be appropriately conflated. Furthermore, unless clearly stated in the claims, the sequence of processing elements and the sequences described herein, the use of numbers and letters, or the use of other names, are not intended to limit the sequence of processes and methods herein. Although the foregoing has addressed, by means of various examples, some embodiments of the invention that are currently believed to be useful, RCb / nn / eznz / E / YiAi -57 It is understood that such detail is for illustrative purposes only and that the appended claims are not limited to the described modalities, but rather the claims are intended to cover all equivalent modifications and combinations that fall within the spirit and scope of the modalities of the present disclosure. For example, although the implementation of several components described above may be incorporated into a hardware device, it may also be implemented as a software-only solution, e.g., an installation on an existing server or mobile device. Similarly, it should be noted that in order to simplify the expression described herein and aid in understanding one or more embodiments of the invention, in the preceding description of the embodiments in this disclosure, multiple features are sometimes combined into one embodiment, including drawings or descriptions thereof. However, this method of disclosure does not imply that the subject matter of the disclosure includes more features than those stated in the claims. Rather, the claimed subject matter may include fewer than all the features of a single embodiment described above. In some embodiments, counts are used to describe the quantity of components and attributes. It should be understood that such counts used in the description of the embodiments employ the modifiers "close to," "approximately," or "substantially" in some examples. Unless otherwise stated, "close to," "approximately," or "substantially" indicates that the stated figure allows for a variation of ±20%. Consequently, in some embodiments, the numerical parameters used in the statement and claims are approximations that may vary depending on the desired characteristics of the individual embodiments. In some embodiments, the specified significant digits should be considered in the numerical parameters, and the general method of digit retention should be adopted.Although the Tangos and parameters mimé tú eos use them in some modalities of the present exposition to confirm the breadth of the range; they are approximations, in specific modalities, such numerical values ​​are established with the greatest possible precision. Each of the patents, patent applications, patent application publications and other materials, such as articles, books, specifications, publications, documents, things and / or the like, to which reference is made herein, are incorporated herein by this reference in their entirety for all purposes, except for any associated court records RCb / nn / eznz / E / YiAi -58with the same, any of the same that is inconsistent with or conflicts with this document, or any of the same that may have a limiting effect on the broader scope of the claims now or hereafter associated with this document. By way of example, if there is any inconsistency or conflict between the description, definition and / or use of a term associated with any of the incorporated materials and the associated with this document, the description, definition and / or use of the term shall prevail in this document. Finally, it should be understood that the application forms described herein are illustrative of the principles governing application forms. Other modifications that may be employed may fall within the scope of the application. Thus, by way of example, and not as a limitation, alternative configurations of application forms may be used in accordance with the teachings herein. Consequently, the forms in this application are not limited precisely to what is shown and described.< / del>

Claims

1. An acoustic output apparatus, comprising: a bone conduction acoustic installation configured to generate bone conduction sound waves; an aerotympanic conduction acoustic installation configured to generate aerotympanic conduction sound waves; and a housing including an accommodation chamber configured to house the bone conduction acoustic installation and the aerotympanic conduction acoustic installation, wherein at least a portion of the housing is in contact with a user's skin to transmit the bone conduction sound waves under the action of the bone conduction acoustic installation; and the aerotympanic conduction sound waves are generated based on the vibrations of at least one of the housing or the bone conduction acoustic installation when the bone conduction sound waves are generated.

2. The acoustic output apparatus of claim 1, wherein the bone conduction acoustic installation includes a transducer device, and the transducer device includes: a magnetic circuit installation configured to generate a magnetic field; a vibrating plate connected to the housing; and an audio coil connected to the vibrating plate, wherein the audio coil vibrates in the magnetic circuit in response to a sound signal, and causes the vibrating plate to vibrate to generate the bone conduction sound waves.

3. The acoustic output apparatus of claim 2, wherein the aerotympanic conduction acoustic installation includes a diaphragm connected to at least one of the bone conduction acoustic installation or housing, and vibrations from the at least one of the bone conduction acoustic installation or housing drive the diaphragm to generate the aerotympanic conduction sound waves.

4. The acoustic outlet of claim 3, wherein the housing chamber includes a first cavity and a second cavity separated by the diaphragm, wherein a first portion of the housing forms the first cavity and is connected to the bone conduction acoustic installation to transmit bone conduction sound waves; and a second portion of the housing lines the second cavity and includes one or more acoustic openings in communication with the second cavity, and aerotympanic conduction sound waves are guided out of the housing through one or more acoustic openings.

5. The acoustic output apparatus of claim 4, wherein the frequency response curve of the bone conduction sound waves includes at least one resonant peak, the at least one resonant peak having a first resonant frequency when the diaphragm is connected to the bone conduction acoustic installation and the housing, the at least one resonant peak having a second resonant frequency when the diaphragm is disconnected from the at least one of the bone conduction acoustic installation or the housing, and the ratio of an absolute value of the difference between the first resonant frequency and the second resonant frequency to the first resonant frequency is less than or equal to 50%.

6. The acoustic output apparatus of claim 5, wherein the first resonant frequency is less than or equal to 500 Hn.

7. The acoustic output apparatus of claim 5, wherein the absolute value of the difference between the first resonant frequency and the second resonant frequency is in a range of 0 Hz-50 Hz.

8. The acoustic output apparatus of any of claims 4-7, wherein the diaphragm includes an annular structure, the inner wall of the diaphragm surrounds the bone conduction acoustic installation and the outer wall of the diaphragm is connected to the housing.

9. The acoustic output apparatus of claims 4-7, wherein the diaphragm includes: a first connecting part surrounding the bone conduction acoustic installation and connecting to the bone conduction acoustic installation; a second connecting part connected to the housing; and a connecting part connecting the first connecting part and the second connecting part.

10. The acoustic output apparatus of claim 9, wherein the RCb / nn / eznz / E / YiAi -61 first connecting part, the second connecting part and the folding part are integrally formed.

11. The acoustic output apparatus of claim 9 or claim 10, wherein the folding portion includes at least one convex region or one CORCdVd region.

12. The acoustic output apparatus of claim 11, wherein the concave region is recessed into the second cavity.

13. The acoustic output apparatus of claim 11 or claim 12, wherein the concave region has a first depth, the first separation distance is between the first connecting part and the second connecting part, and the ratio of the first depth to the first separation distance is in a range of 0.2-1.

4.

14. The acoustic output apparatus of claim 13, wherein the concave region has a width of the first depth to the first depth, and the ratio of the width of the first depth to the first separation distance is in the range of 0.2-0.

0.

15. The acoustic output apparatus of claim 13, wherein there is a first projection distance between a first connection point and a second connection point along the vibration direction of the bone conduction acoustic installation, the first connection point being a connection point between the fold part and the first connection part, the second connection point being a connection point between the fold part and the second connection part, and the ratio of the first projection distance to the first separation distance is in the range of 0-1.

8.

16. The acoustic output apparatus of claim 11, wherein the portion of claim 11 includes: a first transition segment, one end of the first transition segment being connected to the first connecting portion; a second transition segment, one end of the second transition segment being connected to the second connecting portion; a third transition segment, one end of the third transition segment being connected to the other end of the first transition segment; a fourth transition segment, one end of the fourth transition segment being connected to the other end of the second transition segment;and a fifth transition segment, two ends of the fifth transition segment being connected to the other end of the third transition segment and to the other end of the fourth transition segment, respectively, wherein in the direction from a connection point between the first transition segment and the first connecting part to a vertex of the fold part, an angle included between a tangent line on one side of the first transition segment oriented towards the concave region and the vibration direction of the bone conduction acoustic installation gradually decreases, and an angle included between a tangent line on one side of the third transition segment oriented towards the concave region and the vibration direction of the bone conduction acoustic installation remains constant or gradually increases;and in the direction 'from a point of connection between the second transition segment and the second connecting part to the vertex, an angle included between a tangent line of one side of the second transition segment oriented towards the concave region and the 'vibration direction of the bone conduction acoustic installation' gradually decreases, and an angle included between a tangent line of one side of the fourth transition segment oriented towards the concave region and the 'vibration direction of the bone conduction acoustic installation' remains constant or gradually increases.

17. The acoustic output apparatus of claim 16, wherein in the direction perpendicular to the vibration direction of the bone conduction acoustic installation, the first transition segment, the second transition segment, and the fifth transition segment have a first projection length, a second projection length, and a third projection length, respectively, and the ratio of the sum of the first projection length and the second projection length to the third projection length is in a range of 0.4-2.

5.

18. The acoustic outlet assembly of claim 16 or claim 17, wherein the first transition segment is arc-shaped, and the radius of the arc is greater than or equal to 0.2 mm.

19. The acoustic outlet agora of any of claims 1618, wherein the second transition segment is arc-shaped, and the radius of the arc is greater than or equal to 0.3 mm. RCb / nn / eznz / E / YiAi 20. The acoustic output apparatus of any "of" claims 1619, wherein the fifth transition segment is arc-shaped, and the radius of the arc is greater than or equal to 0.2 mm.

21. The acoustic output apparatus of claim 9, wherein the aerotympanic conduction acoustic installation further includes a reinforcing member, and the second connecting part is connected to the housing via the reinforcing member.

22. The acoustic output apparatus of claim 21, wherein the reinforcing member includes a reinforcing ring, and the second "connecting" part is connected to an inner annular surface of the reinforcing ring and to an end surface of the reinforcing ring.

23. The acoustic output apparatus of claim 22, wherein the reinforcing ring is injection molded into the second "connecting" part.

24. The acoustic output apparatus of claim 22 or claim 23, wherein the width of the reinforcing ring is greater than or equal to 0.4 rrm.

25. The acoustic outlet apparatus of any of claims 2224, wherein the hardness of the reinforcing ring is greater than the hardness of the diaphragm.

26. The acoustic output apparatus - of any of the re i vi radications 2125, in which the magnetic circuit installation includes a magnetic conduction cover and a magnet disposed within the magnetic conduction cover, and the first connecting part is injection molded onto the outer peripheral surface of the magnetic conduction cover.

27. The acoustic output apparatus of claim 26, wherein the bone conduction acoustic installation further includes: an audio coil support connected to the housing, wherein the audio coil is connected to the audio coil support, and the audio coil extends into a magnetic space between the magnet and the magnetic conduction cover; and an elastic member, wherein the central region of the elastic member is connected to the magnet, and the peripheral region of the elastic member is connected to the audio coil support such that the magnetic circuit installation is suspended in the housing.

28. The acoustic output apparatus of claim 27, wherein the RCb / nn / eznz / E / YiAi -64 audio coil support and elastic member are arranged in the first cavity.

29. The acoustic output apparatus of claim 27 or claim 28, wherein the audio coil support includes: a main body connected to the peripheral region of the elastic member; a first support, one end of the first support being connected to the main body, and the other end of the first support being connected to the audio coil; and a second support, one end of the second support being connected to the main body, and the other end of the second support pressing the reinforcing member onto a platform of the housing.

30. The acoustic output apparatus of claim 27 or claim 28, wherein there is a first distance from a connection point between the fold portion and the first connection portion to the lower surface of the bone conduction acoustic installation, there is a second distance from the central region of the elastic member to the lower surface of the bone conduction acoustic installation, and the ratio of the first distance to the second distance is in the range of 0.3-0.

8.

31. The acoustic output apparatus of claim 30, wherein there is a third 'distance' from the center of 'gravity' of the magnet to the lower surface of the bone conduction acoustic installation, and the ratio between the first 'distance' to the third 'distance' is in the range of 0.7-2.

32. The acoustic output apparatus of claim 31, wherein the first distance is greater than the third distance.

33. The acoustic outlet apparatus of any of claims 3032, wherein at least a portion of the acoustic opening is located between the connection point and the lower surface of the acoustic conduction installation.

34. The acoustic outlet apparatus of claim 9, wherein the diaphragm thickness is less than or equal to 0.2 rrrn.

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