786results about "Plane diaphragms" patented technology

A controller configured to control a sound producing module includes a volume controlling unit configured to determine a demodulation amplitude and a modulation amplitude corresponding to a target volume. The sound producing module comprises a driving circuit and an air-pulse generating device. The driving circuit generates a demodulation driving signal according to the demodulation amplitude and generates a modulation driving signal according to the modulation amplitude, so as to drive the air-pulse generating device. The air-pulse generating device produces sound via generating a plurality of air pulses at an ultrasonic pulse rate.

The present disclosure is of a bone conduction microphone. The bone conduction microphone comprises of a laminated structure and a base structure. The laminated structure is formed by a vibration unit and an acoustic transducer unit. The base structure is configured to load the laminated structure. At least one side of the laminated structure is physically connected to the base structure. The base structure vibrates based on an external vibration signal, the vibration unit deforms in response to the vibration of the base structure, and the acoustic transducer unit generates an electrical signal based on the deformation of the vibration unit. A resonant frequency of the bone conduction microphone is within a range of 2.5 kHz-4.5 KHz.

The electronic device includes: a rear housing; a middle frame, where the middle frame is connected to the rear housing; a display, where the display is connected to the middle frame; and a sound-making system, where the sound-making system includes a housing and a speaker, the speaker is disposed in the housing, a first sound-making module and a second sound-making module are disposed in the speaker, and the housing is provided with a first sound-making hole and a second sound-making hole. The electronic device is provided with a first sound output portion and a second sound output portion, where the first sound output portion is provided closer to the display than the second sound output portion; or the first sound output portion is located inside the display, and the second sound output portion is located outside the display.

An electronic device includes a casing, a first sound-emitting device and a second sound-emitting device. The first sound-emitting device includes a basket, a vibration system and a magnetic circuit system. The vibration system includes a diaphragm and a voice coil. The magnetic circuit system includes a magnetic bowl, a magnetic unit and an auxiliary magnetic. The first sound-emitting device further includes an upper shell and a front cavity. The first sound-emitting device further includes a first elastic damping member. The diaphragm, the magnetic bowl, the basket and the first elastic damping member are sealed and enclosed to form a first rear cavity, and the first sound-emitting device, the second sound-emitting device and the casing are enclosed to form a second rear cavity. The sound-emitting device of the present invention with good vibration damping effect, high frequency response sensitivity and better acoustic performance.

A MEMS audio device includes a first wafer having a top with a first cavity and a bottom with a vent hole coupled to the first cavity, wherein the bottom having first contacts, a second wafer disposed upon the first wafer having a flexible material layer disposed above the first cavity, a third wafer disposed upon the second wafer having physical contacts coupled to the second wafer, wherein the third wafer includes a second cavity disposed above the flexible material layer, a wiring wafer disposed below the first wafer having a second vent hole coupled to the first cavity, wherein the wiring wafer having second contacts coupled to the first contacts, and wherein the flexible material layer forms a diaphragm for the MEMS audio device.

There is a composite material for an acoustic transducer diaphragm comprising: a thermoplastic polymer resin, a graphitic filler, and optionally a coupling agent. The thermoplastic polymer resin is selected from the group consisting of polypropylene, polyethylene, poly(methyl methacrylate), polycarbonate, polyoxymethylene, cyclic olefin copolymer, polyethylene terephthalate, acrylonitrile butadiene styrene, polybutylene terephthalate, polyamide, poly(ADP-ribose) polymerase, polyethylenimine, polyamide-imide, polyether ether ketone, polyolefin, polyester, polycarbonate, polysulfone, polyacetals, polyvinyl acetals, polyketone, polyamides, cyclic olefin copolymer, thermoplastic thermotropic liquid-crystal polymer, polyphenylene sulfide, polyimide and a mixture thereof. The graphitic filler is selected from the group consisting of graphene oxide, reduced graphene oxide, graphite, graphene and carbon nanotubes, and a mixture thereof. The coupling agent or a mixture is selected from the group consisting of titanium organometallics, aluminum organometallics, zirconium organometallics, and silicon organometallics.

A method for manufacturing a microelectromechanical systems (MEMS) microphone comprises depositing a membrane on a first sacrificial layer, wherein the first sacrificial layer is deposited on a substrate, etching the substrate to define a cavity, releasing the membrane by removing at least the first sacrificial layer, and forming at least one anchor at the edge of the membrane.

The present disclosure provides an open earphone comprising: a sound production component including a transducer and a housing accommodating the transducer and an ear hook. In a wearing state, a portion of the ear hook is hung between an auricle and a user's head, and the other portion of the ear hook extends towards a side of the auricle away from the head and connects to the sound production component to place the sound production component in a position near an ear canal but not blocking the ear canal. The housing is provided with a sound outlet on an inner side surface towards the auricle for guiding a sound generated by the transducer out of the housing and to the ear canal, and a ratio of an area of the sound outlet to an area of the inner side surface is between 0.015 and 0.25.

The present disclosure provides a multifunctional sounder, including a casing having an accommodating cavity, and a sounding unit and at least one driving coil group that are arranged in the accommodating cavity. The sounding unit includes a sounding diaphragm system and a magnetic circuit system configured to drive the sounding diaphragm system along a first direction. The magnetic circuit system includes a main magnet and at least one secondary magnet group. Each secondary magnet group includes a plurality of secondary magnets. Each driving coil group includes at least one driving coil each corresponding to a respective secondary magnet group, and an orthographic projection of each driving coil group along the first direction misalign with the main magnet. Compared with related technologies, when adjusting the height of the sounder, only thicknesses of the secondary magnets need to be adjusted, thereby causing relatively small impact on the acoustic performance of the sounder.

Provided is a speaker, including: a diaphragm structure including first and second diaphragms, the first diaphragm is configured to push air to vibrate to generate initial sound wave, and a signal of which is modulated based on a signal within an audible sound frequency band; and a cover plate structure enclosing with the diaphragm structure to form sound-generating cavity, the cover plate structure has a sound outlet hole connecting the sound-generating cavity with outside, the initial sound wave in the sound-generating cavity is transmitted to the outside through the at least one sound outlet hole to form a sound signal, the second diaphragm and the cover plate structure generate an acoustic environmental impedance used to modulate the initial sound wave to change sound pressure of the sound signal. The speaker can modulate and output a sound signal covering the audible sound frequency band based on the acoustic environmental impedance.

Operating an electrostatic acoustic device simultaneously as a speaker and as a microphone. The electrostatic acoustic device includes a membrane and an electrode disposed proximate to the membrane. An input varying audio signal is input to the electrostatic acoustic device. The membrane is configured to respond mechanically to a varying electric field responsive to the varying audio signal input. A portion of the input varying audio signal is tapped to produce a reference signal. A signal is detected responsive to motion of the membrane, to convert the signal to an output varying voltage signal. The output varying voltage signal is compared to the reference signal to produce a microphone signal. The microphone signal is responsive to motion of the membrane induced by air pressure variations of ambient sound.

Embodiments of this application provide a frequency response consistency calibration method and an electronic device, to solve a problem that when a screen sound production component of an electronic device plays a sound signal, a frequency response curve of the sound signal greatly fluctuates. The frequency response consistency calibration method includes: An electronic device plays a test audio signal. The electronic device stores a calibration parameter. The calibration parameter is a running parameter of an equalizer calibration module. The calibration parameter is determined based on a frequency response of a first audio signal and a standard frequency response of the test audio signal. The first audio signal is obtained by a calibration device by acquiring the test audio signal played by the electronic device. The calibration parameter is used to adjust, through the equalizer calibration module when the electronic device plays a second audio signal, a frequency response of the second audio signal played by the electronic device.

A textile enabling control related to sound output is to be provided. A textile according to the present application is characterized by being formed to include foil of an organic piezoelectric film.

A microspeaker includes a frame defining a space; and an actuator positioned within the space, the actuator including a diaphragm configured to vibrate in a first direction during operation. A center axis of the diaphragm extends in the first direction. A plate assembly mechanically couples to the frame and defines a path for venting fluid from the space. The plate assembly includes: a first plate extending in a plane and defining first apertures that are offset from the center axis in the plane; and a second plate defining a second aperture intersected by the center axis. The second plate includes: an inner recessed region abutting the second aperture; and an outer non-recessed region. The first plate is mechanically coupled to the second plate, the first plate and the inner region of the second plate defining a channel that fluidly couples the first apertures to the second aperture.

The application provides a vibrating diaphragm and a loudspeaker. The loudspeaker comprises a vibrating diaphragm. The vibrating diaphragm comprises a crystal and a film body. The crystal can form a magnetic field after being electrified. The film body is formed by solidification of a liquid injection material. One side surface of the film body has a protruding part. The protruding part is provided with a receiving groove. The crystal is located in the receiving groove. The top of the protruding part has a shielding part. The shielding part is partially located above the receiving groove and is used for limiting the crystal and exposing part of the crystal. The crystal and the film body are connected in an integrated injection molding manner. The crystal can form a variable magnetic field through current change and interact with an environmental magnetic field to drive the film body to vibrate and emit sound. The vibrating diaphragm and the loudspeaker can realize the purposes of simplifying the process, ensuring the connection between the crystal and the film body, improving the production efficiency and reducing the processing cost by connecting the crystal and the film body in an integrated injection molding manner. The structural stability is further improved through the structural design of the protruding part and the shielding part in the film body, so that the purpose of ensuring the sound quality is realized.

In an acoustic vibration device that vibrates panel material, a drip-proof structure is added while suppressing an increase in the height dimension. [Solution] The acoustic vibration device 1 comprises a frame 11 fixed to the ceiling interior material 501 side between the ceiling interior material 501 and the outer panel 502 of the vehicle, a vibration unit 12 including a cylindrical body 4 and a magnetic circuit unit 3, a voice coil 52 arranged in the magnetic gap of the magnetic circuit unit 3, a bobbin 51 around which the voice coil 52 is wound, a first damper 61 connecting the cylindrical body 4 and the bobbin 51, a second damper 62 connecting the cylindrical body 4 and the frame 11, and a drip-proof cover 2 to prevent water droplets falling from the outer panel 502 side from adhering to the second damper 62. The drip-proof cover 2 is formed in an annular shape with an open center, is attached to the vibration unit 12, and is positioned on the outer circumference side of the magnetic circuit unit 3 and above the second damper 62. The upper part of the magnetic circuit unit 3 is positioned above the drip-proof cover 2, passing through the opening 23 of the drip-proof cover 2.

A speaker comprises a magnet, a movable coil, a support element, and a membrane connected to the coil, and the membrane converts the motion of such coil into sound, said membrane being inflatable. According to the invention, the membrane is made of a single piece, is ring-shaped, exchangeable and protrudes from the support element, said ring-shaped membrane producing broadband sound and allowing both low-frequency sound and harmonics thereof, as well as intermediate-frequency and high-frequency sound to be reproduced-in space and in a substantially isotropic manner-.

The application discloses a piezoelectric sensing unit, a piezoelectric microphone and a terminal. The piezoelectric sensing unit comprises a base, an auxiliary layer, a center film, a piezoelectric film and a plurality of cantilevers. The base has a cavity extending along a first direction, and the cavity forms a polygonal opening on a first surface of the base, the polygonal opening having adjacent first and second sides. The auxiliary layer is formed on the first surface of the base, and the auxiliary layer comprises a first auxiliary part located in a region adjacent to the first side of the first surface. The cantilevers are connected to the sides of the polygonal opening one by one, and each cantilever comprises a first end part and a second end part, the first end part is connected to the first auxiliary part, and the connection point of the first end part and the first auxiliary part is located on one side of the first auxiliary part close to the second side. The cantilever extends along the extension direction of the second side. The second end part of each cantilever is connected to the center film. In the scheme, the length of the cantilever is relatively long, which is beneficial to improving the signal-to-noise ratio of the piezoelectric microphone.

A microelectromechanical device for interaction with a fluid. A displacer structure, wherein the displacer structure is arranged in a cavity, wherein the displacer structure comprises a movable lamella that is deflectable for interaction with a fluid pressure in a pressure region of a cavity, wherein the lamella has at least one edge region, wherein the edge region of the lamella is movable along at least one boundary surface of the cavity when the lamella is deflected, wherein a flow channel is formed between the boundary surface and the edge region, wherein fluid can flow out of the pressure region via the flow channel, wherein the edge region and / or the boundary surface comprise means that make it more difficult for fluid to flow out of the pressure region via the flow channel.

A transducer (10A) is provided with: a substrate (20) that contains silicon; and a piezoelectric element (30) that is disposed on the substrate (20). The substrate (20) has: a film body (21) having a first surface (21a) and a second surface (21b) that face one another from opposite directions in a thickness direction; and a frame body (22) that surrounds the film body (21) when viewing the film body (21) from the thickness direction. The piezoelectric element (30) is disposed on the first surface (21a) of the film body (21). A portion of an outer edge (21c) of the film body (21) when viewed from the thickness direction forms a connected part (21d) that is connected to the frame body (22), and the remainder of the outer edge (21c) aside from the connected part (21d) is separated from the frame body (22). The substrate (20) has a projecting part (24) that projects in the thickness direction from a region, of the second surface (21b), that includes at least a portion of the remainder of the outer edge (21c).

And a dual-compression driver with a rectangular outlet, wherein the small horn is aligned with the central axis of the dual-compression driver. The small horn has a blade-shaped contoured transition from a circular base at a first end to a second end that terminates in a rectangular outlet. The dual compression driver may include a horn having a rectangular throat, which may be coupled to the rectangular outlet of the dual compression driver.

A heat dissipation module, including vapor chamber and sound-producing device attached and fixed to vapor chamber; vapor chamber includes vapor chamber body having receiving cavity, capillary wick in receiving cavity, and opening on side of vapor chamber body close to sound-producing device; opening connects receiving cavity with outside, sound-producing device is supported by vapor chamber body and fixed to opening to seal opening, and receiving cavity is filled with heat dissipation liquid; sound-producing device includes magnetic circuit unit spaced apart from vapor chamber, and first vibration unit and second vibration unit on opposite sides of magnetic circuit unit. Magnetic circuit unit drives first vibration unit and second vibration unit to vibrate; sound-producing device includes first frame, one end of first frame is fixed to side of magnetic circuit unit close to vapor chamber, and another end of first frame is supported by vapor chamber and arranged around opening.

This application discloses a diaphragm for a sound-generating device and its preparation method, as well as the sound-generating device itself. The diaphragm comprises at least one microporous polyurethane elastomer film layer, which includes a polyurethane elastomer and a micropore-forming material. The microporous polyurethane elastomer film layer has micropores. The micropore-forming material includes inorganic hollow microspheres, with the content of inorganic hollow microspheres accounting for 5wt% to 50wt% of the total amount of the microporous polyurethane elastomer film layer. The average pore size of the micropores is 1μm to 60μm, and the loss factor of the microporous polyurethane elastomer film layer at room temperature is ≤0.15. The diaphragm of this application, by incorporating inorganic hollow microspheres into the polyurethane elastomer to form a microporous polyurethane elastomer film layer, not only reduces the density of the diaphragm and improves the mid-frequency sensitivity of the sound-generating device, but also, by controlling the amount of inorganic hollow microspheres added, enables the diaphragm material to have suitable damping, balancing the strength and transient resilience required during diaphragm vibration.

A display device includes a display panel configured to display an image, and a film actuator configured to vibrate the display panel, wherein the film actuator includes a plurality of vibration generation devices configured with a composite film, wherein the plurality of vibration generation devices are configured to have different expansion coefficients, and wherein the composite film includes a plurality of vibration portions configured to have piezoelectric properties, and a plurality of expansion portions configured to have flexibility and to overlap the plurality of vibration portions.

A 3D ultrasonic sensor probe, comprising a housing, a vibrating diaphragm, a piezoelectric element, and a plurality of ultrasonic receiving elements. The bottom of the housing is connected to the vibrating diaphragm. The housing is provided with a first through hole and a plurality of second through holes having the same number as that of the ultrasonic receiving elements, the first through hole and the plurality of second through holes all extending in the height direction of the housing. The piezoelectric element is arranged in the first through hole and is fixed to the vibrating diaphragm. The plurality of ultrasonic receiving elements are respectively arranged in the plurality of second through holes on a one-to-one basis and are fixed to the vibrating diaphragm or side walls of the second through holes. The present invention has a simple structure, is easy to manufacture, and has a great ability to identify obstacles.

A coaxial speaker including a basket frame, a magnetic circuit system, a woofer vibration system, and a tweeter vibration system. The magnetic circuit system is provided with a cavity, a tweeter magnetic gap, and a woofer magnetic gap. The woofer vibration system includes a woofer diaphragm and a woofer voice coil. The tweeter vibration system includes a tweeter diaphragm and a tweeter voice coil. The woofer magnetic gap includes a first magnetic gap and a second magnetic gap, and the woofer voice coil includes a first voice coil and a second voice coil. The magnetic circuit system includes a magnetic yoke, a main magnetic portion, a first sub-magnetic portion, and a second sub-magnetic portion. The main magnetic portion includes a first magnet, a second magnet, a third magnet, and a main pole core. The main core includes a first plate portion, a second plate portion, and a wall portion.

A system for providing an actuated wall visual effect in an amusement park environment, the system comprising: a panel mounting frame; and a panel coupled to the panel mounting frame via a damper. The system also comprises a transducer mounting frame and a transducer configured to convert an audio signal into mechanical energy. The transducer comprises a first portion coupled to the transducer frame and a second portion coupled to the panel such that the transducer is configured to vibrate the panel relative to the transducer mounting frame in response to receiving the audio signal.

The present invention relates to vehicle glazing suitable for acoustic transmission, comprising an exciter and a glazed assembly, the exciter comprising a connecting portion and a movable portion, the glazing comprising at least one spacer, the connecting portion comprising a mounting portion and a suspended portion, the spacer being fixedly mounted on the mounting portion and on the glazed assembly, the suspended portion having a first face and the glazed assembly having a second face, the first face being arranged facing the second face, the glazing comprising a cavity arranged between the first face and the second face, the cavity being formed by the first face and preferably by the second face.