BONE CONDUCTION SPEAKERS.

Abstract

The present disclosure provides a bone conduction loudspeaker, comprising: a vibration installation, including a vibration element and a vibration housing, the vibration element being used to convert an electrical signal into a mechanical vibration, the vibration housing being used to make contact with a user's face to transmit the mechanical vibration to the user in a bone conduction manner to produce a sound; and a resonance installation including a first elastic element and a mass element, the mass element being connected to the vibration installation by the first elastic element, wherein the vibration installation causes the resonance installation to vibrate, weakening the vibration amplitude of the vibration housing.

Description

This presentation relates to the field of bone conduction loudspeakers and, in particular, to a bone conduction loudspeaker capable of enhancing low-frequency vibration. Background of the Invention A bone conduction speaker converts a sound signal into a mechanical vibration signal. This mechanical vibration signal is transmitted to the human auditory nerve through the bone and tissue, allowing the user to hear the sound. By extending the frequency response range of a bone conduction speaker, particularly its low-frequency response, the amplitude of its low-frequency resonance peak increases. This results in a stronger sensation of the vibration generated by the bone conduction speaker, impacting the user's experience. Furthermore, the high resonance peak value reduces sound quality. The present exhibit provides a bone conduction speaker that not only significantly reduces the sensation of vibration of the bone conduction speaker at the low-frequency resonance peak, but also improves the sound quality of the bone conduction speaker. Summary of the Invention It is an objective of the present presentation to provide a bone conduction speaker for the purpose of reducing the amplitude of a low-frequency resonance peak of the bone conduction speaker in order to achieve a reduced vibration sensation of the bone conduction speaker and improve its sound quality. To achieve this purpose, the present exposition provides the following technical solutions. A bone conduction loudspeaker may include: a vibration installation, including a vibration element and a vibration housing, the vibration element being used to convert an electrical signal into a mechanical vibration, the vibration housing being used to make contact with a user's face and transmit the mechanical vibration to the user via bone conduction to produce a sound; and an installation of - 2 resonance, including the resonance installation a first elastic element and a mass element, the mass element being connected to the vibration installation by the first elastic element, wherein the vibration installation causes the resonance installation to vibrate, weakening the vibration of the resonance installation the vibration amplitude of the vibration housing. In some configurations, the ratio of the mass element mass to the mass of the vibration housing is in the range of 0.04 ~ 1.25. In some modes, the ratio of the mass element mass to the mass of the vibration housing is in the range of 0.1 ~ 0.6. In some modalities, the vibration installation generates a first low-frequency resonance peak at a first frequency and the resonance installation generates a second low-frequency resonance peak at a second frequency, the ratio of the second frequency to the first frequency being in a range of 0.5 ~ 2. In some modes, the vibration installation generates the first low-frequency resonance peak at the first frequency and the resonance installation generates the second low-frequency resonance peak at the second frequency, with the ratio between the second frequency and the first frequency ranging from 0.9 to 1.1. In some modes, the first frequency and the second frequency are both below 500 Hz. In some modalities, the vibration amplitude of the resonance installation is greater than the vibration amplitude of the vibration housing in a frequency range lower than the first frequency. In some models, the vibration installation also includes a second elastic element, where the vibration housing contains the vibration element and the second elastic element contains the vibration element that transmits the mechanical vibration to the vibration housing through the second elastic element. In some models, the second elastic element is a transducer, with the transducer being permanently connected to the vibration housing. In some models, the first elastic element is fixedly connected to the vibration housing, with the vibration housing transmitting the mechanical vibration to the mass element through the first elastic element. In some modalities, the resonance facility is housed within the t? t cenn / eznz / E / YiAi -3 vibration housing, the resonance installation being connected to the inner wall of the vibration housing through the first elastic element. In some forms, the first elastic element includes a diaphragm and the mass element includes a composite structure fixed to the surface of the diaphragm. In some versions, the composite structure includes a paper cone, an aluminum sheet, or a copper sheet. In some embodiments, the vibration housing is arranged with at least one sound outlet hole, and the sound generated by the vibration of the resonance installation is exported to an external world through the at least one sound outlet hole. In some models, at least one sound outlet hole is located on one side of the vibration housing behind the user's face. In some models, the bone conduction speaker also includes a mounting installation, the mounting installation being used to maintain stable contact between the bone conduction speaker and the user, the mounting installation being permanently connected to the vibration housing. In some modalities, the resonance installation is located outside the vibration housing, with the resonance installation being connected to the outer wall of the vibration housing via the first elastic element. In some embodiments, the mass element is a recessed member, the vibration housing is at least partially housed within the recessed member, the first elastic element is connected to the outer wall of the vibration housing and to the inner wall of the recessed member, and an acoustic channel is formed between the inner wall of the recessed member and the outer wall of the vibration housing. In some models, the bone conduction speaker also includes a mounting system, the mounting system being used to maintain contact between the bone conduction speaker and the user's face, the mounting system being permanently connected to the resonance system. cpnn / pznz / E / YiAi Brief Description of the Figures of the Invention This exhibition will also be described by means of exemplary formats, which will be described in detail by means of the accompanying drawings. These formats are not exhaustive, and the same numbering applies to each format. -4 indicates similar structures where: Figure 1 is a module diagram illustrating a bone conduction loudspeaker according to some modalities of the present exposition; Figure 2 is a schematic diagram illustrating a longitudinal cross-section of a bone conduction loudspeaker without adding a resonance installation according to some modalities of the present exposition; Figure 3 is a partial frequency response curve illustrating a bone conduction loudspeaker without adding a resonance installation according to some modalities of the present exposition; Figure 4 is a schematic diagram illustrating a longitudinal cross-section of a bone conduction loudspeaker with the addition of a resonance installation according to some modalities of the present exposition; Figure 5 is a partial frequency response curve illustrating a bone conduction loudspeaker with the addition of a resonance installation according to some modalities of the present exposition; Figure 6 is a schematic diagram illustrating a longitudinal cross-section of another bone conduction loudspeaker according to some modalities of the present exposition; Figure 7 is a schematic diagram illustrating a longitudinal cross-section of another bone conduction loudspeaker according to some modalities of the present exposition; Figure 8 is a schematic diagram illustrating a longitudinal cross-section of another bone conduction loudspeaker according to some modalities of the present exposition; Figure 9 is a schematic diagram illustrating a longitudinal cross-section of another bone conduction loudspeaker according to some modalities of the present exposition; Figure 10 is a schematic diagram illustrating a simplified mechanical model of a bone conduction loudspeaker without adding a resonance installation according to some modalities of the present exposition; and Figure 11 is a schematic diagram illustrating a simplified mechanical model of a bone conduction loudspeaker with the addition of a resonance installation, in accordance with some modalities of the present exposition. crnn / cznz / E / YiAi -6 transmit the processed sound (or the generated electrical signal) to the bone conduction speaker. That is, the bone conduction speaker can be modified in a certain way to include the function of capturing ambient sound and transmitting the sound to the user / wearer through the bone conduction speaker after some signal processing, thus performing the function of a bone conduction hearing aid. As an example, the algorithm described herein may include one or a combination of noise cancellation, automatic gain control, acoustic feedback suppression, wide dynamic range compression, active room identification, active noise reduction, directional processing, tinnitus processing, multi-channel wide dynamic range compression, active hiss suppression, volume control, etc. Figure 1 is a module diagram illustrating a bone conduction loudspeaker according to some of the modalities of this presentation. As shown in Figure 1, the bone conduction loudspeaker 100 may include a vibration assembly 110, a resonance assembly 120, and a mounting assembly 130. The vibration unit 110 can generate mechanical vibration. The generation of mechanical vibration is accompanied by energy conversion, and the bone conduction speaker 100 can utilize the vibration unit 110 to convert a signal containing sound information into mechanical vibration. The conversion process can involve the coexistence and conversion of many different types of energy. For example, an electrical signal passing through a transducer in the vibration unit 110 can be directly converted into mechanical vibration to produce sound. Similarly, sound information can be contained in a light signal, and a specific transducer device can implement the process of converting the light signal into a vibration signal. Other types of energy that can coexist and be converted during the operation of the transducer include thermal energy, magnetic energy, and so on.The energy conversion methods of the transducer device may include a moving coil, electrostatic, piezoelectric, moving iron, pneumatic, electromagnetic, etc. In some modalities, the vibration installation 110 may include a vibration housing and a vibration element. At least a portion of the vibration housing may be in contact with crnn / cznz / E / YiAi - 7. A human face vibrator transmits mechanical vibration to the facial bones, allowing the human body to hear sound. The vibrating housing may be enclosed or open, and the vibrating element may be arranged within it. In some designs, the vibrating housing may not be enclosed but directly connected to the vibrating element. In some designs, the vibrating housing may be connected directly or indirectly to the vibrating element, and the mechanical vibration of the vibrating element is transmitted to an auditory nerve through the bones, allowing the human body to hear sound. In some modalities, the vibration element (i.e., the transducer device) may include a magnetic circuit installation. The magnetic circuit installation may provide a magnetic field. The magnetic field may be used to convert a signal containing sound information into a mechanical vibration signal. In some modalities, the sound information may include a video, an audio file with a particular data format, or data or files that can be converted into sound by a particular means. The signal containing the sound information may originate from a storage facility within the same Bone Conduction Loudspeaker 100, or from a different information generation, storage, or delivery system than the Bone Conduction Loudspeaker 100.The signal containing the sound information can include one or more combinations of an electrical signal, an optical signal, a magnetic signal, a mechanical signal, etc. The signal containing the sound information can originate from a single source or from multiple signals. The multiple signal sources may or may not be related. In some configurations, the Bone Conduction Speaker 100 can acquire the signal containing the sound information in a variety of ways; for example, the signal acquisition can be wired or wireless, and it can be real-time or delayed. For instance, the Bone Conduction Speaker 100 can receive an electrical signal containing sound information via wired or wireless means, or it can retrieve data directly from a storage medium to generate a sound signal.As another example, the 100 bone conduction speaker may include an installation with a sound pickup function that converts the mechanical vibration of sound into an electrical signal by capturing ambient sound, which is processed by an amplifier to obtain an electrical signal cenn / eznz / E / YiAi. -8 that meets the specific requirements. In some configurations, the wired connection may include one or a combination of a metallic cable, an optical cable, or a hybrid metallic-optical cable, such as, for example, a coaxial cable, a communication cable, a flexible cable, a coiled cable, a cable with a non-metallic sheath, a cable with a metallic sheath, a multi-strand cable, a twisted-pair cable, a flat cable, a shielded cable, a telecommunications cable, a two-wire cable, a two-wire parallel conductor, a twisted-pair cable, etc. The examples described above are for illustrative purposes only. The medium of the wired connection may also be of other types, for example, other carriers for the transmission of electrical or optical signals, etc. Wireless connectivity can include radio communication, free-space optical communication, acoustic communication, and electromagnetic induction, etc. Radio communication can include the IEEE 802.11 series of standards, the IEEE 802.15 series of standards (e.g., Bluetooth and cellular technologies, etc.), first-generation mobile communication technologies, second-generation mobile communication technologies (e.g., FDMA, TDMA, SDMA, CDMA, and SSMA, etc.), general packet radio service technologies, third-generation mobile communication technologies (e.g., CDMA2000, WCDMA, TD-SCDMA, and WiMAX, etc.), fourth-generation mobile communication technologies (e.g., TD-LTE and FDD-LTE, etc.), satellite communication (e.g., GPS, etc.), near-field communication (NEC), and other technologies operating in the ISM band (e.g., 2.4 GHz, etc.).Optical communication in free space can include visible light, infrared signals, etc.; acoustic communication can include acoustic waves, ultrasonic signals, etc.; electromagnetic induction can include near-field communication technology, etc. The examples described above are for illustrative purposes only, and the medium for wireless connection can also be of other types, e.g., Z-wave technology, other license-based civilian radio bands, and military radio bands, etc. For example, as one of the application scenarios in this presentation, the Bone Conduction Speaker 100 can receive the signal containing sound information from other devices via Bluetooth™ technology. The resonance installation 120 is connected to the vibration installation 110, and the vibration installation 110 can transmit at least a portion of the cenn / eznz / E / YiAi -9 Mechanical vibration to the resonating installation 120 when the vibration installation 110 generates mechanical vibration, causing the resonating installation 120 to vibrate, thus weakening the vibration amplitude of the vibration installation 110. In some modalities, the resonating installation 120 may include a first elastic element and a mass element, and the mass element may be connected to the vibration installation 110 through the first elastic element. The vibration installation 110 may transmit the mechanical vibration to the mass element through the first elastic element, causing the mass element to vibrate. The Fixation Fixture 130 can act as a fixed support for the Vibration Fixture 110 and the Resonance Fixture 120, thus maintaining stable contact between the Bone Conduction Speaker 100 and the user's face. The Fixation Fixture 130 may include one or more fixing connectors. In some modalities, the Fixation Fixture 130 can be used binaurally. For example, the Fixation Fixture 130 can be permanently attached to two sets of Vibration Fixtures 110 (or Resonance Fixtures 120) at each end. When the user is wearing the Bone Conduction Speaker 100, the Fixation Fixture 130 can hold two sets of Vibration Fixtures 110 (or Resonance Fixtures 120) close to the user's left and right ears, respectively. In some modalities, the Fixation Fixture 130 can also be used monaurally.For example, the Fixation Fixture 130 can be permanently attached to only one group of the Vibration Fixture 110 (or the Resonance Fixture 120). When the user is wearing the Bone Conduction Speaker 100, the Fixation Fixture 130 can hold the Vibration Fixture 110 (or the Resonance Fixture 120) close to the user's ear. In some modalities, the Fixation Fixture 130 can be any combination of one or more glasses (e.g., sunglasses, augmented reality glasses, virtual reality glasses), a helmet, or a headband, without limitation herein. The above description of the bone conduction loudspeaker structure is only one specific example and should not be considered the only feasible modality. Obviously, it is possible for a subject matter expert to make various modifications and changes in form and detail to the specific shape and stages to implement the bone conduction loudspeaker 100 without departing from the basic principles of bone conduction loudspeakers, but these modifications and changes remain cenn / eznz / E / YiAi - 10 within the scope of the preceding description. For example, the bone conduction loudspeaker 100 may include one or more processors, and the processors may perform one or more sound signal processing algorithms. The sound signal processing algorithms may correct or enhance the sound signal. For example, the sound signal may be subjected to noise reduction, acoustic feedback suppression, wide dynamic range compression, automatic gain control, active room awareness, active noise reduction, directional processing, tinnitus processing, multi-channel wide dynamic range compression, active hiss suppression, volume control, or the like, or any combination thereof, and these corrections and changes remain within the scope of protection of the claims herein.As another example, the 100 bone conduction speaker may include one or more sensors, such as a temperature sensor, a humidity sensor, a speed sensor, a displacement sensor, etc. The sensors can collect information from the user or environmental information. Figure 2 is a schematic longitudinal cross-section diagram illustrating a bone conduction loudspeaker without a resonance unit, according to some modalities of this presentation. As shown in Figure 2, in some modalities, the bone conduction loudspeaker 200 may include a vibration unit 210 and a mounting unit 230. In some embodiments, the vibration installation 210 may include a vibration element 211, a vibration housing 213, and a second elastic element 215 elastically connected to the vibration element 211 and the vibration housing 213. The vibration element 211 can convert an acoustic signal into a mechanical vibration signal, thereby generating mechanical vibration. When mechanical vibration of the vibration element 211 occurs, the vibration housing 213 can be driven to vibrate by the second elastic element 215. It should be noted that when the vibration element 211 transmits mechanical vibration to the vibration housing 213 through the second elastic element 215, the vibration frequency of the vibration housing 213 is the same as the vibration frequency of the vibration element 211. The vibration element 211 described herein may refer to an element that converts an acoustic signal into a mechanical vibration signal, for example, a transducer. In some modalities, the element of cenn / eznz / E / YiAi Vibration element 211 may include a magnetic circuit and a coil. The magnetic circuit creates a magnetic field within which the coil experiences mechanical vibration. Specifically, the coil is supplied with a signal current and placed within the magnetic field. It is subjected to an amperage force to generate the mechanical vibration. Simultaneously, the magnetic circuit experiences a reaction force opposite to that of the coil. Under the influence of the amperage force, vibration element 211 generates mechanical vibration. The mechanical rotation of vibration element 211 is then transmitted to vibration housing 213, causing the housing 213 to vibrate in response. In some embodiments, the vibration housing 213 may include a housing panel 2131, a housing side panel 2132, and a housing back panel 2133. Housing panel 2131 refers to the side of the vibration housing 213 that is in contact with the user's face when the user is wearing the bone conduction speaker 200. Housing back panel 2133 is located on the opposite side of housing panel 2131. In some embodiments, housing panel 2131 and housing back panel 2133 are located on two end surfaces of housing side panel 2132, respectively. Housing panel 2131, housing side panel 2132, and housing back panel 2133 may form a housing-like structure with some space. In some embodiments, the vibration element 211 may be located inside this housing-like structure. In some embodiments, the housing panel 2131, housing side panel 2132, and housing rear panel 2133 may be made of the same material or of different materials. For example, housing panel 2131 and housing side panel 2132 may be made of the same material, while the material used to manufacture housing rear panel 2133 may be different from the first two. In some embodiments, housing panel 2131, housing side panel 2132, and housing rear panel 2133 may each be made of a different material. In some embodiments, the material used to manufacture the 2131 housing panel includes, but is not limited to, an acrylonitrile butadiene styrene copolymer (ABS), a polystyrene (PS), a high-impact polystyrene (HIPS), a polypropylene (PP), a polyethylene terephthalate (PET), a polyester cenn / eznz / E / YiAi - 12 (PES), a polystyrene polycarbonate (HIPS), a polypropylene (PP), a polyethylene terephthalate (PET), a polypropylene (PES) and a polyethylene terephthalate (PET), a Polyester (PES), a Polycarbonate (PC), a Polyamide (PA), a Polyvinyl chloride (PVC), a Polyurethane (PU), a Polyvinylidene chloride, a Polyethylene (PE), a Polymethyl methacrylate (PMMA), a Polyether-ether-ketone (PEEK), a phenolic (PE), a urea-formaldehyde resin (UF), a melamine-formaldehyde resin (ME) and some metals and alloys (such as aluminum alloy, chromium-molybdenum steel, scandium alloy, magnesium alloy, titanium alloy, magnesium-lithium alloy, nickel alloy, etc.), fiberglass or carbon fiber, or a combination of any of these materials.In some embodiments, the material used to manufacture the 2131 housing panel is any combination of fiberglass, carbon fiber, and a material such as polycarbonate (PC), polyamides (PA), etc. In some embodiments, the material used to manufacture the 2131 housing panel may be a mixture of carbon fiber and polycarbonate (PC) in a specified ratio. In some embodiments, the material used to manufacture the 2131 housing panel may be a mixture of carbon fiber, fiberglass, and polycarbonate (PC) in a specified ratio. In some embodiments, the material used to manufacture the 2131 housing panel may be a mixture of fiberglass and polycarbonate (PC) in a specified ratio, or fiberglass and polyamide (PA) may be mixed in a specified ratio. In some configurations, the 2131 enclosure panel must have a certain thickness to ensure rigidity. In some configurations, the thickness of the 2131 enclosure panel is no less than 0.3 mm. Depending on the preference, for example, the thickness of the 2131 enclosure panel is no less than 0.5 mm, 0.8 mm, or 1 mm. However, as the thickness increases, so does the weight of the 700 enclosure, thus increasing the weight of the 200 bone conduction speaker, which can affect the sensitivity of the 200 bone conduction speaker. Therefore, the thickness of the 2131 enclosure panel should not be too great. In some configurations, the thickness of the 2131 enclosure panel does not exceed 2.0 mm. Depending on the preference, for example, the thickness of the 2131 enclosure panel is no more than 1.5 mm. In some configurations, the 2131 housing panel can be configured in different shapes. For example, the 2131 housing panel can be configured as a square, a rectangle, or approximately a rectangle (e.g., a structure in cenn / eznz / E / YiAi). - 13 where the four corners of the rectangle are replaced with curved shapes), an oval, a circle or any other shape. In some embodiments, the 2131 housing panel may consist of a single material. In some embodiments, the 2131 housing panel may consist of two or more materials in a laminated layer. In some embodiments, the 2131 housing panel may include a layer of a material with a higher Young's modulus, plus a layer of a material with a lower Young's modulus in combination. This has the advantage of ensuring the rigidity requirements of the 2131 housing panel while simultaneously increasing comfort in contact with the human face and improving the fit of the 2131 housing panel and the contact with the human face.In some forms, the material with the highest Young's modulus may be an acrylonitrile butadiene styrene copolymer (ABS), a polystyrene (PS), a high-impact polystyrene (HIPS), a polypropylene (PP), a polyethylene terephthalate (PET), a polyester (PES), polycarbonate (PC), polyamides (PA), polyvinyl chloride (PVC), polyurethane (PU), polyvinylidene chloride, polyethylene (PE), polymethyl methacrylate (PMMA), polyether-ether-ketone (PEER), phenolics (PF), urea-formaldehyde resins (UF), melamine-formaldehyde resins (MF), and any of a number of metals, alloys (such as aluminum alloys, chromium-molybdenum steel, scandium alloys, magnesium alloys, titanium alloys, magnesium-lithium alloys, nickel alloys, etc.), a fiberglass or a carbon fiber, or a combination of any of these materials. In some embodiments, the portion of housing panel 2131 that comes into contact with human skin may be all or part of the area of ​​housing panel 2131. For example, housing panel 2131 is an arched structure with only a portion of the arched structure in contact with human skin. In some embodiments, both housing panel 2131 and human skin may be in contact with the face. In some embodiments, the surface of housing panel 2131 in contact with the human body may be a flat surface. In some embodiments, the outer surface of housing panel 2131 may have a series of protrusions or cavities. In some embodiments, the outer surface of housing panel 2131 may be a curved surface of arbitrary contour. It should be noted that, since vibration element 211 includes a magnetic circuit installation, and vibration element 211 is housed within crnn / cznz / E / YiAi- 14 of the vibration housing 213. Therefore, the larger the volume (i.e., the volume of the housing space) of the vibration housing 213, the larger the magnetic circuit installation can be accommodated within the vibration housing 213, thereby enabling the bone conduction speaker 200 to have greater sensitivity. The sensitivity of the bone conduction speaker 200 can be reflected by the volume level produced by the bone conduction speaker 200 under a certain sound signal input. When the same sound signal is input, the greater the volume generated by the bone conduction speaker 200, the greater the sensitivity of the bone conduction speaker 200. In some configurations, the volume of the bone conduction speaker 200 increases as the volume of the housing space of the vibration housing 213 increases.Therefore, this exhibition also has certain requirements for the volume of the 213 vibration enclosure. In some configurations, to ensure the 200 bone conduction speaker has high sensitivity (volume), the volume of the 213 vibration enclosure can be 2000 mm³ to 6000 mm³. According to preference, for example, the volume of the 213 vibration enclosure can be 2000 mm³ to 5000 mm³, 2800 mm³ to 5000 mm³, 3500 mm³ to 5000 mm³, 1500 mm³ to 3500 mm³, or 1500 mm³ to 2500 mm³. The mounting bracket 230 is permanently attached to the vibrating housing 213 of the vibrating unit 210. This bracket is used to maintain stable contact between the bone conduction speaker 200 and human tissue or bone, preventing vibration of the speaker and ensuring the housing panel 2131 remains stable for sound transmission. In some configurations, the mounting bracket 230 may be an elastic, arc-shaped bracket capable of generating a spring-like force at the midpoint of the arc to maintain stable contact with the skull. For example, when using ear hooks as the mounting bracket, as shown in Figure 2, the upper point p of the ear hook fits snugly against the head, and this upper point p can be considered the mounting point.The ear hook is permanently attached to the side panel of housing 2132. The fixed connection method includes using adhesive, or attaching the ear hook to the side panel of housing 2132 or the rear panel of housing 2133 by snap-fit, welding, or threading. The portion of the ear hook that connects to the vibration housing 213 can be made of CRN / CZNZ / E / YiAi. - 15 same, different, or partially of the same material as the housing side panel 2132 or the housing back panel 2133. In some embodiments, a plastic, silicone, and / or metallic material may be included in the ear hook to reduce its rigidity (i.e., a smaller stiffness factor). For example, the ear hook may include a rounded titanium wire. Optionally, the ear hook may be integrally molded with the housing side panel 2132 or the housing back panel 2133. Further examples of the vibration installation 210 and the vibration housing 213 can be found by reference to PCT Applications Nos. PCT / CN2019 / 070545 and PCT / CN2019 / 070548 filed on January 5, 2019, the full content of which is incorporated herein by reference. As described above, the vibration installation 210 may also include a second elastic element 215. The second elastic element 215 can be used to elastically connect the vibration element 211 to the vibration housing 213 in such a way that the mechanical vibration of the vibration element 211 can be transmitted to the vibration housing 213 through the second elastic element 215. When the vibration housing 213 generates mechanical vibration by making contact with the wearer's (or user's) face, the mechanical vibration is transmitted through the bones to the auditory nerve so that the human body can hear the sound. In some embodiments, the vibrating element 211 and the second elastic element 215 can be accommodated inside the vibrating housing 213, and the second elastic element 215 can connect the vibrating element 211 to the inner wall of the vibrating housing 213. In some embodiments, the second elastic element 215 can include a first part and a second part. The first part of the second elastic element 215 can be connected to the vibrating element 211 (e.g., the magnetic circuit installation of the vibrating element 211), and the second part of the second elastic element 215 can be connected to the inner wall of the vibrating housing 213. In some embodiments, the second elastic element 215 can be a transducer. The first part of the transducer can be connected to the vibration element 211, and the second part of the transducer can be connected to the vibration housing 213. Specifically, the first part of the transducer can be connected to the magnetic circuit assembly of the vibration element 211, and the second part to the vibration housing 213. - Part 16 of the transducer can be connected to the inner wall of the vibration housing 213. Optionally, the transducer has an annular structure, with the first part of the transducer being closer to the central region of the transducer than the second part. For example, the first part of the transducer can be located in the central region of the transducer, while the second part is located on the circumference of the transducer. In some embodiments, the transducer may be an elastic member to allow the transmission of mechanical vibration from the vibrating element 211 to the vibrating housing 213. The elasticity of the transducer can be determined by various aspects of a transducer's material, thickness, structure, etc. In some embodiments, the material used to manufacture the transducer includes, but is not limited to, a plastic (e.g., but is not limited to, polymeric polyethylene, blow-molded nylon, engineered plastic, etc.), steel (e.g., but is not limited to, stainless steel, carbon steel, etc.), a lightweight alloy (e.g., but is not limited to, aluminum alloy, beryllium copper alloy, magnesium alloy, titanium alloy, etc.), or other simple or composite materials capable of achieving the same properties. The composite material may include, but is not limited to, a reinforcing material such as fiberglass, carbon fiber, boron fiber, graphite fiber, graphene fiber, silicon carbide fiber, or aramid fiber, or a composite of other organic and / or inorganic materials, such as, for example, a fiberglass-reinforced unsaturated polyester, an epoxy resin, or a phenolic resin matrix composed of various types of FRP. In some models, the transducer may have a specific thickness. Depending on the preference, for example, in some models, the transducer thickness is 0.005 mm to 3 mm, 0.01 mm to 2 mm, 0.01 mm to 1 mm, or 0.02 mm to 0.5 mm. In some embodiments, the transducer's elasticity can be provided by its structure. For example, the transducer may be an elastic structural body, and elasticity can be provided by the structure even if the material used to manufacture the transducer has high rigidity. In some embodiments, the transducer structure may include, but is not limited to, a spring-like structure, a ring or annular structure, etc. In some embodiments, the transducer structure may also be configured in a sheet form. In cenn / eznz / E / YiAi - In some configurations, the transducer structure can also be configured in a strip form. The specific transducer structure can be combined based on the material, thickness, and structure described above to form different transducers. For example, a sheet-like transducer can have a different thickness distribution, with the first part of the transducer being thicker than the second part. In some configurations, there can be one or more transducers. For example, there can be two transducers, with the second parts of the two transducers connected to the inner walls of the two side panels of housing 2132 at opposite positions, and the first parts of the two transducers connected to the vibration element 211. In some embodiments, the transducer can be connected directly to the vibration housing 213 and the vibration element 211. In some embodiments, the transducer can be connected to the vibration element 211 and the vibration housing 213 by adhesive. In some embodiments, the transducer can also be attached to the vibration element 211 and the vibration housing 213 by welding, clamping, riveting, threaded connection (e.g., connection by screws, bolts, studs, and other components), clamp connection, pin connection, wedge connection, and one-piece molding. Further examples of the transducer can be found in PCT Applications Nos. PCT / CN2019 / 070545 and PCT / CN2019 / 070548 filed on January 5, 2019, the full contents of which are incorporated herein by reference. In some embodiments, the vibration assembly 210 may also include a first connecting member. The transducer can be connected to the vibration element 211 via the first connecting member. In some embodiments, the first connecting member may be permanently attached to the vibration element 211, as shown in Figure 2. For example, the first connecting member may be fixed to the surface of the vibration element 211. In some embodiments, the first part of the vibration element 211 may be permanently attached to the first connecting member. In some embodiments, the transducer may also be attached to the first connecting member by welding, press fitting, riveting, threaded connection (e.g., connection using screws, bolts, and other components), clamp connection, pin connection, wedge connection, and one-piece molding. In some embodiments, the assembly crnn / cznz / E / YiAi The vibration element 210 may also include a second connecting member (not shown in the figures), which can be fixed to the inner wall of the vibration housing 213. For example, the second connecting member can be fixed to the inner wall of the housing side panel 2132. The transducer can be connected to the vibration housing 213 via the second connecting member. In some embodiments, the second part of the vibration element 211 can be permanently connected to the second connecting member. The second connecting member can be connected to the vibration element in the same or similar manner to how the first connecting member is connected to the vibration element in the embodiments described above, which are not described here. Figure 3 is a partial frequency response curve illustrating a bone conduction loudspeaker without a resonance chamber, according to some of the modalities discussed herein. The horizontal axis represents frequency, and the vertical axis represents the vibration intensity (or vibration amplitude) of the bone conduction loudspeaker 200. The vibration intensity mentioned here can also be understood as the vibration acceleration of the bone conduction loudspeaker 200. The higher the value on the vertical axis, the greater the vibration amplitude of the bone conduction loudspeaker 200, which also indicates a stronger vibration sensation from the bone conduction loudspeaker 200.To simplify the description, in some modalities, a sound frequency range below 500 Hz may be referred to as the low-frequency region, a sound frequency range from 500 Hz to 4000 Hz may be referred to as the mid-frequency region, and a sound frequency range above 4000 Hz may be referred to as the high-frequency region. In some modalities, the sound in the low-frequency region may give the user a more pronounced vibration sensation if there are very sharp peaks in the low-frequency region (i.e., the vibration acceleration of certain frequencies is much greater than the vibration acceleration of other nearby frequencies). On the one hand, the user may perceive the sound as harsher and higher-pitched; on the other hand, the sensation of strong vibration may also cause discomfort.Therefore, in the low-frequency range, very sharp peaks and valleys are not desirable; the flatter the frequency response curve, the better the sound of the 200 bone conduction speaker. As shown in Figure 3, the 200 bone conduction loudspeaker generates a crnn / cznz / E / YiAi low-frequency resonance peak in the low-frequency region (near - 19 100 Hζ). This low-frequency resonance peak can be generated by the vibration installation 210 acting together with the fixing installation 230. The vibration acceleration of this low-frequency resonance peak is large, resulting in a strong vibration sensation from the vibration panel 2131, causing the user's face to feel pain when using the bone conduction speaker 200, affecting the user's comfort and experience. Figure 4 is a schematic longitudinal cross-sectional diagram illustrating a bone conduction loudspeaker with the addition of a resonating device, according to some modalities of this presentation. As shown in Figure 4, in some modalities, the bone conduction loudspeaker 400 includes a vibrating device 410 and a resonating device 420. The resonating device 420 is elastically connected to the vibrating device 410 and can transmit mechanical vibration to the resonating device 420 when the vibrating device 410 experiences mechanical vibration. When the resonating device 420 is forced to vibrate, it can absorb the mechanical force from the vibrating device 410, thereby weakening the vibration amplitude of the vibrating device 410. In some embodiments, the vibration installation 410 may include a vibration element 411, a vibration housing 413, and a second elastic element 415. The vibration housing 413 is elastically connected to the vibration element 411 by means of the second elastic element 415. The vibration housing 413 can be driven to vibrate mechanically when the vibration element 411 vibrates mechanically. In some embodiments, the vibration element 411, the vibration housing 413, and the second elastic element 415 are the same as or similar to the vibration element 211, the vibration housing 213, and the second elastic element 215 in the bone conduction loudspeaker 200, respectively, and the details of their structures are not repeated here. In some embodiments, the resonance installation 420 may include a mass element 421 and a first elastic element 423, with the first elastic element 423 being fixedly connected to the mass element 421. The mass element 421 can be connected to the vibration installation 410 via the first elastic element 423. The vibration housing 413 can transmit mechanical vibration to the mass element 421 via the first elastic element 423 to cause the mass element 421 to vibrate mechanically. When the mass element cenn / eznz / E / YiAi The mechanical vibration generated by the vibration element 413, the acceleration of the vibration, i.e., the vibration intensity, can be weakened by the vibration of the vibration housing 413, thereby reducing the vibration sensation and improving the user experience. In some configurations, the first elastic element 423 can be connected to any other position on the vibration housing 413, except for the housing panel that is in direct contact with the user. For example, the first elastic element 423 can be connected to the side panel of the housing 4132 or the rear panel of the housing 4133. In this case, since the resonance unit 420 is not in direct contact with the skin, the vibration of the resonance unit 420 does not cause the user to experience an uncomfortable vibration sensation.In the example shown in Figure 4, the first elastic element 423 can be connected to the outer side of the vibration housing 413 on a side opposite the housing panel 4131. Figure 5 is a partial frequency response curve illustrating a bone conduction loudspeaker with the addition of a resonance device, according to some of the modalities discussed herein. Figure 5 also illustrates the frequency response curve of the resonance device. According to Figure 5, it can be seen that under the influence of the 420 resonance device, the frequency response curve of the 400 bone conduction loudspeaker in the low-frequency region can become flatter, avoiding the strong vibration sensation caused by a sharp resonance peak and improving the user experience. To facilitate understanding, when the bone conduction loudspeaker does not include a resonance chamber, the mechanical model of the bone conduction loudspeaker can be equated to the model shown in Figure 10. Specifically, the vibration panel and the vibration element can be simplified as a mass block mi and a mass block mi, respectively; the ear hook can be simplified as an elastic connector ki; the second elastic element can be simplified as an elastic connector k2; and the damping of the elastic connectors ki and ki is Ri and R2, respectively. The vibration panel and the vibration element are subjected to forces F and -F, respectively, to generate a vibration. The composite vibration system, consisting of the vibration panel, the vibration element, the transducer, and the ear hook, is fixed at the upper point p of the ear hook. t cenn / eznz / E / YiAi - 21 Similarly, for ease of understanding, when the bone conduction loudspeaker includes a resonance installation, the mechanical model of the bone conduction loudspeaker can be equated to the model shown in Figure 11. Specifically, mi and m2 represent the masses of the vibration housing and the vibration element, respectively; m2 represents the mass of the mass element in the resonance installation; ki and Ri represent the elasticity and damping of the fixing installation, respectively; k2 and R2 represent the elasticity and damping of the second elastic element, respectively; and k2 and R2 represent the elasticity and damping of the first elastic element. The entire composite vibration system is fixed at the upper point p of the ear hook, and the vibration surface housing and the vibration element are subjected to forces F and -F, respectively, to produce vibration.When the resonance installation is added, it is equivalent to increasing the stiffness and damping of the vibration housing, while the amperometric force F does not change, and the reaction force -F of the amperometric force also does not change, while the stiffness and damping of the vibration housing increase, so the addition of the resonance installation can weaken the vibration amplitude of the vibration housing. It can be understood that the vibration fixture 410 and the resonance fixture 420 can each generate a low-frequency resonance peak in the low-frequency region, and using the resonance fixture 420 to absorb the mechanical vibration of the vibration enclosure 413 can achieve the purpose of reducing the amplitude of the mechanical vibration of the vibration enclosure 413 at its resonance peak. Specifically, as shown in Figure 5, the curve without the resonance fixture indicates the frequency response without the resonance fixture 420 added to the bone conduction loudspeaker 400. It can be seen that the vibration fixture 410 (combined with the mounting fixture 230) can generate a first low-frequency resonance peak 450 at the first frequency f. The curve with the resonance fixture The resonance installation indicates the frequency response of the same 420 resonance installation, and it can be seen that the 420 resonance installation can generate a second low-frequency resonance peak at 460 Hz. The curve with the resonance installation and bone conduction speaker represents the frequency response of the 400 bone conduction speaker. Figure 22 shows the resulting frequency response of the bone conduction loudspeaker 400 with the added resonance installation 420. It can be seen that the frequency response of the bone conduction loudspeaker 400 with the added resonance installation 420 is flatter in the low-frequency region compared to that of the bone conduction loudspeaker (e.g., the bone conduction loudspeaker 200 shown in Figure 2) without the added resonance installation 420. The frequency response in the low-frequency region of the bone conduction loudspeaker (e.g., the bone conduction loudspeaker 200 shown in Figure 2) is flatter, and its amplitude near the first frequency f is significantly lower than that without the resonance installation 420. The first frequency f is an intrinsic frequency of the vibration installation 410 (in combination with the fixing installation 230), and the second frequency fo is an intrinsic frequency of the resonance installation 420.In some modalities, the intrinsic frequency is related to a material, a mass, a coefficient of elasticity, and a shape of the structure itself. It should be noted that the vibrating element 411 transmits mechanical vibration to the vibrating housing 413 through the second elastic element 415, and the vibrating housing 413 is forced to vibrate, and the vibrating housing 413 vibrates at the same frequency as the vibrating element 411. Similarly, the vibrating housing 413 transmits mechanical vibration to the mass element 421 of the resonating installation 420 through the first elastic element 423, causing the mass element 421 to be forced to move, and the vibration frequency of the mass element 421 is the same as the vibration frequency of the vibrating housing 413. As can be seen from Figure 5, in the frequency response of the resonating installation 420 itself, the vibration acceleration of the resonating installation 420 increases with increasing frequency in the range from 100 Hz up to the second frequency fo.When the frequency reaches the second frequency fO, the second low-frequency resonance peak 460 occurs. As the frequency continues to increase, the vibration acceleration of the resonance installation 420 decreases. It can be understood that the frequency response of this resonance installation 420 can reflect its response to external vibrations of different frequencies (i.e., vibration of the vibration housing 413). For example, at and near the second frequency fO, the resonance installation 420 can absorb most of the vibrations. -23 the mechanical energy of the 413 vibration housing. This brings the advantage that the 420 resonance installation mainly reduces the vibration of the 413 vibration housing near its low-frequency resonance peak, and has little or no effect on the vibration of the 413 vibration housing near the non-low-frequency resonance peak, which can make the final frequency response curve of the 400 bone conduction speaker flatter and of better sound quality. In some configurations, to weaken the vibration intensity of the first low-frequency resonance peak 450 of the vibration housing 413, the frequency fO corresponding to the second resonance peak 460 of the resonance installation 420 can be set close to the frequency f corresponding to the first resonance peak 450 of the vibration housing 413. With reference to Figure 5, in some configurations, the ratio of the second frequency fo to the first frequency f is in the range of 0.5 ~ 2. According to preference, for example, the ratio of the second frequency fo to the first frequency f is in the range of 0.65 ~ 1.5, 0.75 ~ 1.2, 0.85 ~ 1.15 or 0.9 ~ 1.1. To extend the frequency response range of the 400 bone conduction loudspeaker, the low-frequency resonant peak of the 410 vibration unit and the 420 resonance unit can be set at a lower frequency by changing the structure and material of the 410 vibration unit and the 420 resonance unit. In some configurations, the first low-frequency resonant peak (450) and the second low-frequency resonant peak (460) can both be located in the low-frequency region. Depending on preference, for example, both the first frequency (f) and the second frequency (fo) can be set below 800 Hz, 700 Hz, 600 Hz, or 500 Hz. In some embodiments, by optimizing the structure and material of the resonant installation 420 (e.g., optimizing the mass of the mass element 421, the elastic coefficient of the first elastic element 423, etc.), the resonant installation 420 can generate greater vibration than the vibration housing 413 when the vibration housing 413 transmits vibration to the resonant installation 420. For example, in at least a portion of the frequency range lower than (or higher than) the first frequency f, the resonant installation 420 can vibrate at a greater amplitude than the vibration amplitude of the vibration housing 413. At this point, since the resonant installation 420 is not cenn / eznz / E / YiAi - 24 is in direct contact with the user; the greater vibration of the 420 resonance element does not cause the user to feel an uncomfortable vibration sensation. Furthermore, due to the greater amplitude of the 420 resonance element, the 421 mass element in the 420 resonance element can be designed with a larger area structure, and as the 420 resonance element vibrates, the vibration of the 421 mass element with its large area can cause the air to vibrate, generating a low-frequency aerotympanic conduction sound, thereby improving the low-frequency response of the 400 bone conduction speaker. As further shown in Figure 5, the bone conduction loudspeaker 400 can generate two low-frequency resonance peaks in the low-frequency region, a third low-frequency resonance peak 471, and a fourth low-frequency resonance peak 473, under the interaction of the vibration housing 413 and the resonance installation 420. The vibration acceleration of the third low-frequency resonance peak 471 and the fourth low-frequency resonance peak 473 is lower than that of the first low-frequency resonance peak 450, meaning that the bone conduction loudspeaker 400 with the resonance installation 420 has a lower vibration amplitude of the low-frequency resonance peaks than the bone conduction loudspeaker without the resonance installation 420 (e.g.,The bone conduction speaker 200, shown in Figure 2, provides a better experience for the user, who will have a better experience when wearing the bone conduction speaker 400. In some modes, the bone conduction speaker can generate two low-frequency resonance peaks in a frequency range below 450 Hz. Depending on the user's preference, for example, the bone conduction speaker 400 can generate two low-frequency resonance peaks in the frequency range below 400 Hz, 350 Hz, 300 Hz, or 200 Hz. When the mass nu of the mass element 421 of the resonance installation 420 is very small, the effect of the resonance installation 420 on the amplitude of the mechanical vibration of the vibration housing 413 is small, resulting in ineffective weakening of the mechanical vibration near the first low-frequency resonance peak 450 of the vibration housing 413. For example, if the mass im of the mass element 421 of the resonance installation 420 is too small, even if the resonance installation 420 is increased, the vibration acceleration of the first low-frequency resonance peak 450 of the vibration housing 413 remains large and cannot be crnn / cznz / E / YiAi -25 effectively weaken the vibration sensation of the 400 bone conduction speaker. And when the mass nu of the mass element 421 of the resonance installation 420 is very large, the effect of the resonance installation 420 on the amplitude of the mechanical vibration of the 400 bone conduction speaker is too large and will significantly change the frequency response of the 400 bone conduction speaker. Therefore, the mass nu of the mass element 421 of the resonance installation 420 needs to be controlled within a certain range. In some modalities, a ratio of the mass πρ of the mass element 421 of the resonance installation 420 to the mass mi of the vibration housing 413 is in a range of 0.04 ~ 1.25, 0.05 ~ 1.2, 0.06 ~ 1.1, 0.07 ~ 1.05, 0.08 ~ 0.9, 0.09 ~ 0.75 or 0.1 ~ 0.6. Figure 6 is a schematic longitudinal cross-section diagram illustrating another bone conduction loudspeaker according to some of the modalities discussed herein. As shown in Figure 6, the bone conduction loudspeaker 600 may include a vibration unit 610 and a resonance unit 620. The vibration unit 610 can generate mechanical vibration. The resonance unit 620 can receive the mechanical vibration from the vibration unit 610, weakening the amplitude of the mechanical vibration from the vibration unit 610. In some embodiments, the vibration installation 620 may include a vibration element 611, a vibration housing 613, and a second elastic element 615. The vibration element 611 can be elastically connected to the vibration housing 613 by means of the second elastic element 615. When the vibration element 611 vibrates mechanically, the vibration housing 613 can be driven to vibrate mechanically, which in turn transmits a vibration to the tissues and bones of the user's face, and through the tissues and bones to the auditory nerve, enabling the user to hear a sound. In some embodiments, the vibration element 611, vibration housing 613, and second elastic element 615 are the same as or similar to the vibration element 211, vibration housing 213, and second elastic element 215 in the bone conduction loudspeaker 200, respectively, and the details of their structures are not repeated here. In some embodiments, the resonance installation 620 may include a first elastic element 623 and a mass element 621. The mass element 621 can be elastically connected to the vibration housing 613 by means of the first elastic element 623 and the first mass element 621. -26elastic element 623. The vibration housing 613 transmits a vibration to the mass element 621 through the first elastic element 623 in such a way that the mechanical vibration of the vibration housing 613 is partially absorbed by the mass element 621, thereby weakening the amplitude of the vibration of the vibration housing 613. As shown in Figure 6, the resonance installation 620 can be accommodated inside the vibration housing 613, and the resonance installation 620 can be connected to the inner wall of the vibration housing 621 by means of the first elastic element 623. In some embodiments, the first elastic element 623 may include a diaphragm. A circumference of the diaphragm may be connected by a support structure or directly to the inner portion of a housing side panel 6132 of the vibration housing 613. The housing side panel 6132 is a side wall arranged around a housing panel 6131. ​​When vibration of the vibration housing 613 occurs, the housing side panel 6132 may cause vibration of the diaphragm. Since the diaphragm here relies on connection to the vibration housing 613 and vibrates via a drive mechanism of the vibration housing 613, it may be termed a passive diaphragm. In some embodiments, the diaphragm may include, but is not limited to, a plastic diaphragm, a metal diaphragm, a paper diaphragm, a biological diaphragm, etc. In some configurations, the mass element 621 may include a composite structure. The composite structure may be attached to the diaphragm surface to form a composite diaphragm (i.e., the resonance installation 620).The composite structure fixed to the diaphragm surface primarily performs the following functions: (1) The 621 composite structure can be used as a counterweight to adjust the mass of a composite diaphragm, such that the composite diaphragm as a whole falls within a certain mass range. This results in the passive diaphragm having a higher vibration amplitude and can effectively weaken the vibration amplitude of the 600 bone conduction speaker in the low-frequency range; (2) The 621 composite structure and the diaphragm combine to form a composite diaphragm structure with greater rigidity. The composite diaphragm surface is less prone to producing higher-order modes, thus preventing excessive peaks and valleys in the frequency response of the passive diaphragm. The mass of the 621 mass element and the response of cenn / eznz / E / YiAi. - 27 The frequency of the composite diaphragm formed by the mass element 621 and the diaphragm may be the same as or similar to a mass element (e.g., the mass element 421) and the resonance installation (e.g., the resonance installation 420) in other modalities of this present exhibition, which will not be described here. In some embodiments, the composite structure may include, but is not limited to, a paper cone, an aluminum foil, or a copper foil, or a combination thereof. In some embodiments, the composite structure may be made of the same material. For example, the composite structure may be a paper cone or an aluminum foil. In some embodiments, the composite structure may be made of different materials. For example, the composite structure may be a combination of a paper cone and a copper foil. As another example, the composite structure may be a structure made from a mixture of aluminum or copper in a certain proportion. In some embodiments, the way in which the composite structure is connected to the diaphragm may include, but is not limited to, the use of a glued fixation, or a welded, press-fit, riveted, threaded (screw, bolt, etc.), interference connection, clamp connection, pin connection, tightening wedge connection, or formed connection. It can be understood that when the diaphragm vibrates, it causes the air inside the vibration housing 613 to vibrate, thereby producing a sound. Therefore, in some embodiments, the vibration housing 613 may be arranged with at least one sound outlet 640 to direct the sound generated by the diaphragm's vibration outside the housing 613, and this directed sound can be perceived, at least partially, by the human ear. This portion of the sound can enhance the response of the bone conduction loudspeaker 600 in the low-frequency region, such that the bone conduction loudspeaker 600 becomes weaker in the low-frequency vibration direction, but is still able to maintain a certain volume. In some embodiments, at least one sound outlet 640 can be arranged in any position on the vibration housing 613. In some embodiments, at least one sound outlet 640 can be arranged on one side of the vibration housing 613 with its rear facing the user's face, i.e., on the rear panel of the housing 6133. In some embodiments, at least one sound outlet 640 can also be arranged on the side panel of the housing 6132, for example, on the side panel -28 of housing 6132 facing the user's ear canal. In other configurations, at least one sound output hole 640 may also be arranged in a corner of the vibration housing 613, e.g., where the side panel of housing 6132 connects to the rear panel of housing 6133. In some configurations, the sound output holes 640 may be multiple. The multiple sound output holes 640 may be arranged in different positions. For example, a portion of the multiple sound output holes 640 may be arranged in the rear panel of housing 6133 and another portion may be arranged in the side panel of housing 6132. In some configurations, at least a portion of the sound derived through at least one of the sound output holes 640 may be directed to the user's ear, enhancing the low-frequency response of the bone conduction speaker 600.In some embodiments, the above can be achieved by placing at least one sound outlet 640 in a position oriented toward the human ear. For example, the user wears the bone conduction loudspeaker 600 with the housing side panel 6132 facing the human ear, such that at least one sound outlet 640 can be provided in the housing side panel 6132, and sound is exported through the sound outlet 640, with at least a portion of it directed toward the human ear. In some embodiments, additional sound-conducting structures can be provided to achieve the above purposes. For example, an acoustic duct can be arranged in an outlet of at least one of the sound outlet 640, through which sound is guided in the direction of the human ear. In some modalities, a cross-sectional shape of the 640 sound outlet hole may include, but is not limited to, a circle, a square, a triangle, a polygon, or the like. In some configurations, the 600 bone conduction speaker may also include a 630 mounting bracket, and the 630 mounting bracket can be permanently attached to the 613 vibration housing. The 630 mounting bracket can be used to maintain stable contact between the 600 bone conduction speaker and the user's face (e.g., the wearer), to prevent shaking of the 600 bone conduction speaker, and to ensure stable sound output from the 600 bone conduction speaker. In some modes, the more pronounced the low-frequency response of the bone conduction speaker is at the first resonance peak 450 cenn / eznz / E / YiAi -29 (i.e., high vibration acceleration and high sensitivity) when the stiffness of the fixing installation 630 is lower (i.e., lower stiffness coefficient), the sound quality of the bone conduction speaker 600 is more beneficial. On the other hand, when the stiffness of the fixing installation 630 is lower (i.e., the stiffness coefficient is small), it is beneficial for the vibration of the vibration housing 613. In some embodiments, the fixing assembly 630 can be directly and permanently connected to the vibration housing 613. In some embodiments, the fixing assembly 630 and the vibration housing 613 can be connected to each other by means of a connecting member. In some embodiments, the fixing assembly 630 may include a fixing connecting member. The fixing connecting member can connect the fixing assembly 630 to the vibration housing 613. In some embodiments, the fixing connecting member may be one or a combination of one or more of a silicone, a sponge, a plastic, a spring, or a carbon sheet. In some embodiments, the fixation device 630 may be in the form of an ear hook. The fixation device 630 has a vibration housing 613 connected to each end of the fixation device 630, securing the two vibration housings 613 to each side of the human skull in an ear hook shape. In some embodiments, the fixation device 630 may be an ear clip for a single ear. The fixation device 630 may be individually connected to the vibration housing 613 and secure the vibration housing 613 to one side of the human skull. The construction of the fixation device 630 may be the same as or similar to the fixation device in other embodiments of this exhibit (e.g., fixation device 230) and will not be described herein. Figure 7 is a schematic longitudinal cross-sectional diagram illustrating another bone conduction loudspeaker according to some modalities of the present exposition. As shown in Figure 7, the bone conduction loudspeaker 700 may include a vibration assembly 710 and a resonance assembly 720. The vibration assembly 710 may include a vibration element 711, a vibration housing 713, and a second elastic element 715. The second elastic element 715 is used to elastically connect the vibration element 711 and the vibration housing 713 and to transmit a mechanical vibration from the vibration element 711 to the vibration housing 713. In some cenn / eznz / E / YiAi -30 modalities, the vibration element 711, the vibration housing 713 and the second elastic element 715 are the same or similar to the vibration element 211, the vibration housing 213 and the second elastic element 215 in the bone conduction loudspeaker 200, respectively, and the details of their structures are not repeated here. The resonance assembly 720 may include a mass element 721 and a first elastic element 723. The mass element 721 may be elastically connected to the vibration housing 713 by means of the first elastic element 723. As described in Figure 7, the resonance assembly 720 may be arranged outside the vibration housing 713. The resonance assembly 720 may be connected to the outer wall of the vibration housing 713 by means of the first elastic element 723. When mechanical vibration occurs in the vibration housing 713, the resonance assembly 720 may absorb a portion of the mechanical energy of the vibration housing 713, thereby weakening the vibration amplitude of the vibration housing 713. In some configurations, the mass element 721 can be configured in different shapes. For example, a square body, a nearly square body (e.g., where the eight corners of the square body are curved), or an elliptical body, etc. In some embodiments, the mass element 721 may be a recessed member. The recessed member may at least partially accommodate the vibrating housing 713. In some embodiments, the cross-sectional shape of the recessed member cavity may be a circle, a square, a polygon, or other shapes. In some embodiments, the cross-sectional shape of the recessed member cavity may match the external contour of the vibrating housing 713. For example, if the external profile of the vibrating housing 713 is rectangular, the cross-sectional shape of the recessed member cavity may be a corresponding square. In some embodiments, the vibrating housing 713 may be completely contained within the recessed member cavity. In some embodiments, the vibrating housing 713 may be partially accommodated within the recessed member cavity.For example, a housing panel 7131 and at least a portion of a side housing panel 7132 of the vibration housing 713 can be positioned outside the cavity to facilitate contact between the housing panel 7131 and the human skull and transmit a vibration. In some modalities, the first elastic element 723 can connect cenn / eznz / E / YiAi. -31 a back panel of housing 7133 to the inner wall of the recessed member. For example, a first part of the first elastic element 723 is connected to the back panel of housing 7133 and a second part of the first elastic element 723 is connected to the inner wall of the recessed member. Assuming that the first elastic element 723 has an annular structure, the first part of the first elastic element 723 can be located in the central region of the annular structure, and the second part can be located on the circumference of the annular structure. In some embodiments, the first part of the first elastic element 723 can be connected to the back plate of housing 7133, and the second part of the first elastic element 723 can be connected to a bottom panel of the recessed member.In some embodiments, the first part of the first elastic element 723 can be connected to the housing side panel 7132, and the second part of the first elastic element 723 can be connected to a side panel of the recessed member. In some embodiments, the vibration housing can include only the housing panel 7121 and the housing side panel 7132 without the housing back panel 7133. In this case, the resonance assembly 720 can be connected to the housing side panel 7132 or to the inner wall of the vibration housing 713 by means of the first elastic element 723. In some embodiments, the first elastic element 723 can be connected directly to the housing back panel 7133 and to the recessed member. In some embodiments, the first elastic element 723 can be connected to the housing back panel 7133 and to the recessed member via a connecting member. For example, a third connecting member can be fixed to the housing back panel 7133, and the first part of the first elastic element 723 can be permanently connected to the third connecting member. The recessed member can be fixed with a fourth connecting member, and the second part of the first elastic element 723 can be permanently connected to the fourth connecting member. In some embodiments, the mass of the mass element 721 and the frequency response of the resonant assembly 720 formed by the mass element 721 and the first elastic element 723 can be equal to or similar to a mass element (e.g.,, mass element 421) and a resonance installation (e.g., resonance installation 420) in other modalities of the present exhibition, and therefore will not be described herein. In some embodiments, the internal dimension of the reduced member may be crnn / cznz / E / YiAi greater than the external dimension of the vibration housing 713, at which point it may -32A cavity is formed between the vibrating housing 713 and the recessed member. The vibrating housing 713 and the recessed member can force air into the cavity so that it vibrates when it vibrates, producing a sound. For example, in the embodiment shown in Figure 7, there is a space between the side wall of the recessed member and the housing side panel 7132, and this space can be used as an acoustic channel 740. The human ear can partially receive the sound, to a certain extent, to enhance the low-frequency effect and increase the volume. In some embodiments, the bone conduction loudspeaker 700 may also include a mounting fixture 730. The mounting fixture 730 can be used to maintain the bone conduction loudspeaker 700 in contact with the user's skull. In some embodiments, the mounting fixture 730 may be permanently attached to the resonance fixture 720. For example, the mounting fixture 730 may be permanently attached or integrally molded with the mass element 721 (e.g., a recessed member). In some embodiments, the mounting fixture 730 may be permanently attached directly to the recessed member. In some embodiments, the mounting fixture 730 may also be attached to the recessed member via a mounting connecting member. In some embodiments, the fixation device 730 may be in the form of an ear hook. The fixation device 730 has a recessed member and a vibration housing 713 accommodated within the recessed member attached to each end of the fixation device 730, securing the two recessed members to each side of the skull in an ear hook fashion. In some embodiments, the fixation device 730 may be an ear clip for a single ear. The fixation device 730 may be individually connected to the recessed member and the vibration housing 713 accommodated within the recessed member and secure the recessed member to the side of the human skull. The structure of the fixation device 730 may be the same as or similar to the fixation device in other embodiments of this disclosure (e.g., fixation device 230) and will not be described herein. Figures 8 and 9 are schematic longitudinal cross-section diagrams illustrating another bone conduction loudspeaker according to some of the modalities of this presentation. As shown in Figures 8 and 9, the 800 bone conduction loudspeaker may include an 810 vibration installation and cenn / eznz / E / YiAi -33 a resonance installation 820. The vibration installation 810 may include a vibration element 811, a vibration housing 813, and a second elastic element 815 (as shown in Figure 9). The second elastic element 815 is used to elastically connect the vibration element 811 and the vibration housing 813. The vibration housing 813 may be a separate panel or a panel-like structure. Unlike the embodiment shown in Figure 7, the vibration housing 813 does not define a housing space, and the vibration element and the second elastic element 815 are connected to the vibration housing 813. The mass element 821 may be a recessed member, and the mass element 821 may define a housing space, and at least a portion of the vibration installation 810 may be accommodated within the space formed by the mass element 821. The first elastic element 823 may connect the mass element 821 to the vibration housing 813. The vibration element 811 may include a magnetic circuit assembly. A coil is provided in the vibration housing 813, and the magnetic circuit assembly is provided around the outside of the coil, and the second elastic element 815 connects the magnetic circuit assembly to the vibration housing 813. The second elastic element 815 can be a transducer. In some embodiments, the transducer may have an annular structure. As shown in Figure 9, the annular structure of the transducer is provided around the outside of the vibration housing 813, and the circumference of the annular transducer is connected to the magnetic circuit assembly, while half of the annular transducer is connected to the vibration housing 813. When mechanical vibration is produced by the action of the amperage force, the vibration housing 813 can transmit the vibration to the mass element 821 through the first elastic element 823, thus causing the mass element 821 to vibrate, and ultimately achieving the effect of weakening the vibration amplitude of the vibration assembly 810. In some forms, the vibration element 811, vibration housing 813 and second elastic element 815 are the same as or similar to the vibration element 211, vibration housing 213 and second elastic element 215, respectively, in the bone conduction loudspeaker 200 and the details of their construction are not repeated here. crnn / cznz / E / YiAi -34The basic concepts described above, apparently in detail, do not constitute limitations of the exposition. Although no clear explanation is provided here, experts in the field may make various modifications, improvements, and corrections to this exposition. These types of modifications, improvements, and corrections are recommended in this exposition, and modification, improvement, and amendment remain within the spirit and scope of the exemplary form of this exposition. At the same time, this exposition uses specific terms to describe the modalities within it. A modality, or a modality, signifies a certain feature, structure, or characteristic of at least one modality within this exposition. Therefore, it is emphasized and should be appreciated that two or more references to a modality, or to an alternative modality, in various parts of this exposition do not necessarily refer to the same modality. Furthermore, certain features, structures, or characteristics of one or more modalities within this exposition may be combined. Furthermore, those skilled in the art may understand that the aspects of this disclosure can be illustrated and described by a number of patentable categories or situations, including any new and useful combination of processes, machines, products, or substances, or any new and useful improvement thereof. Accordingly, the aspects of this disclosure may be implemented entirely by hardware, entirely by software (including firmware, resident software, microcode, etc.), or by a combination of hardware and software. All of the above hardware or software may be referred to as a data block, module, motor, unit, component, or system. In addition, the aspects of this disclosure may be represented as a computer product located on one or more computer-readable media that include computer-readable program code. Furthermore, unless clearly stated in the claims, the sequence of the present disclosure, the use of digital letters, or the use of other names are not intended to define the order of the processes and methods described herein. Although some examples currently considered useful in this disclosure are discussed in the preceding disclosure, it should be understood that the details will only be described and the claims cenn / eznz / E / YiAi The requirements are not limited to the modes of exposure. They are designed to cover all modifications and equivalents combined with the substance and scope of this exposure. For example, while the implementation of several components described above may be incorporated into a hardware device, it may also be implemented as a software-only scheme, e.g., an installation on an existing server or mobile device. Similarly, it should be noted that to simplify the expression discussed herein and to aid in understanding one or more embodiments, the preceding descriptions of the embodiments herein sometimes combine a variety of features into a single embodiment, drawings, or description thereof. However, this method of presentation does not imply that the features required by the subject matter of this embodiment are more than those mentioned in the claims. Rather, the claimed subject matter may consist of fewer than all the features of a single embodiment described above. In some embodiments, numbers expressing quantities of ingredients, properties, etc., configured to describe and claim certain embodiments of the application, should be understood as modified in some cases by the term "approximately," "about," or "substantially." Unless otherwise indicated, "approximately," "about," or "substantially" indicates that the number is permitted to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, and these approximate values ​​may be changed according to the characteristics required by the individual embodiments. In some embodiments, the numerical parameters should be interpreted in light of the number of significant digits represented and by applying ordinary rounding techniques.Although the numerical domains and parameters used in this exposition are configured to confirm their range breadth, in the specific modality, the adjustments of such values ​​are as precise as possible within the feasible range. Finally, it should be understood that the modalities described herein are configured only to illustrate the principles of the modalities in this exposition. Other distortions may also fall within the scope of this exposition. Therefore, by way of non-limiting example, the alternative configuration of the modality in this exposition may be consistent with crnn / cznz / E / YiAi -36The teachings of the present exhibition. Consequently, the modalities of the present exhibition are not limited to the modalities of the present exhibition clearly described and set out.

Claims

1. A bone conduction loudspeaker, comprising: a vibration installation including a vibration element and a vibration housing, the vibration element being used to convert an electrical signal into a mechanical vibration, the vibration housing being used to make contact with a user's face and transmit the mechanical vibration to the user in a bone conduction manner to produce a sound; and a resonance installation including a first elastic element and a mass element, the mass element being connected to the vibration installation by the first elastic element, wherein the vibration installation causes the resonance installation to vibrate, the vibration of the resonance installation weakening the vibration amplitude of the vibration housing.

2. The bone conduction loudspeaker of claim 1, wherein the ratio of the mass element mass to the vibration housing mass is in the range of 0.04 ~ 1.

25.

3. The bone conduction loudspeaker of claim 1, wherein the ratio of the mass element mass to the vibration housing mass is in the range of 0.1 ~ 0.

6.

4. The bone conduction loudspeaker of claim 1, wherein the vibration installation generates a first low-frequency resonance peak at a first frequency and the resonance installation generates a second low-frequency resonance peak at a second frequency, the ratio of the second frequency to the first frequency being in the range of 0.5 ~ 2.

5. The bone conduction loudspeaker of claim 4, wherein the vibration installation generates the first low-frequency resonance peak at the first frequency and the resonance installation generates the second low-frequency resonance peak at the second frequency, the ratio between the second frequency and the first frequency being in the range of 0.9 ~ 1.

1.

6. The bone conduction loudspeaker of claim 5, wherein the first frequency and the second frequency are both below 500 Hz.

7. The bone conduction loudspeaker of claim 6, wherein the vibration amplitude of the resonating installation is greater than the vibration amplitude of the vibrating housing in a frequency range below the -38 first frequency.

8. The bone conduction loudspeaker of claim 1, wherein the vibration installation further includes a second elastic element, wherein the vibration housing accommodates the vibration element and the second elastic element, the vibration element transmitting the mechanical vibration to the vibration housing through the second elastic element.

9. The bone conduction loudspeaker of claim 8, wherein the second elastic element is a transducer, the transducer being fixedly connected to the vibration housing.

10. The bone conduction loudspeaker of claim 1, wherein the first elastic element is fixedly connected to the vibration housing, the vibration housing transmitting the mechanical vibration to the mass element through the first elastic element.

11. The bone conduction loudspeaker of claim 10, wherein the resonance installation is housed within the vibration housing, the resonance installation being connected to the inner wall of the vibration housing via the first elastic element.

12. The bone conduction loudspeaker of claim 11, wherein the first elastic element includes a diaphragm, and the mass element includes a composite structure fixed to the surface of the diaphragm.

13. The bone conduction loudspeaker of claim 12, wherein the composite structure includes a paper cone, an aluminum foil, or a copper foil.

14. The bone conduction loudspeaker of claim 11, wherein the vibration housing is arranged with at least one sound outlet hole, and the sound generated by the vibration of the resonance installation is exported to an external world through the at least one sound outlet hole.

15. The bone conduction speaker of claim 14, wherein the at least one sound outlet hole is arranged on one side of the vibration housing behind the user's face.

16. The bone conduction loudspeaker of claim 10, wherein the bone conduction loudspeaker further includes a mounting fixture, the mounting fixture being used to maintain stable contact between the bone conduction loudspeaker and the user, the mounting fixture being permanently connected to the vibration housing. cenn / eznz / E / YiAi 17. The bone conduction loudspeaker of claim 10, wherein the resonance assembly is disposed outside the vibration housing, the resonance assembly being connected to the outer wall of the vibration housing via the first elastic element. 5 18. The bone conduction loudspeaker of claim 16, wherein the mass element is a recessed member, the vibration housing is at least partially accommodated within the recessed member, the first elastic element is connected to the outer wall of the vibration housing and to the inner wall of the recessed member, and an acoustic channel is formed between the inner wall of the recessed member and the outer wall of the vibration housing.

19. The bone conduction loudspeaker of claim 16, wherein the bone conduction loudspeaker further includes a fixing installation, the fixing installation being used to maintain contact of the bone conduction loudspeaker with the user's face, the fixing installation being permanently connected to the resonance installation.

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