1266results about "Plane diaphragms" patented technology

The present invention provides a coaxial speaker including a fixing member, a magnetic circuit system, a voice coil, a first vibration system connected with the voice coil, and a second vibration system connected with the voice coil and arranged surrounding the first vibration system. The second vibration system locates coaxially with the first vibration system. The first vibration system includes a first diaphragm and a first support connecting the first diaphragm and the voice coil. The second vibration system includes a second diaphragm and a second support connecting the second diaphragm and the voice coil. The first diaphragm is used for generating treble sound. The second diaphragm is used for generating bass sound. Bass sound and treble sound form a full-range speaker, providing high-quality sound. Moreover, the assembly process is simplified by sharing voice coil, which improves assembly efficiency and reduces costs.

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 air-pulse generating device comprises a film structure, operating at an ultrasonic operating frequency, and a resonant chamber, formed on a side of the film structure. A resonance is formed within the resonance chamber. Due to the resonant chamber, the APG device has a peak on a frequency response of an acoustic property of the APG device at the ultrasonic operating frequency.

The present invention provides a speaker includes a frame, a vibration system fixed with the frame, a magnetic circuit system driving the vibration system to vibrate and sound, a flexible circuit board and an electrical connector. The vibration system includes a diaphragm and a voice coil driving the diaphragm to vibrate. The flexible circuit board is fixed on a side of the diaphragm distal to the voice coil. The flexible circuit board covers and is fixed with the diaphragm. The electrical connector passes through the diaphragm to electrically connect the flexible circuit board and the voice coil. In present invention, the flexible circuit board does not occupy a space of the magnetic circuit system, and the acoustic performance of the speaker is good.

An electroacoustic transducer includes a port that guides a component of at least a partial frequency band of a sound radiated from a first diaphragm in a direction opposite to a direction in which a front surface 38A of a second diaphragm faces, to an external space on a front surface side of the second diaphragm. As the port is provided, the electroacoustic transducer is configured such that a sound pressure of a synthesized sound in the vicinity of a crossover frequency of radiated sounds from the first diaphragm and the second diaphragm in a case in which a drive unit generates vibration is equal to or higher than a sound pressure of the radiated sound from only one of the first diaphragm and the second diaphragm at the crossover frequency.

An exciter-equipped glass diaphragm, includes: a glass plate structure; and a first exciter and a second exciter, which are attached to the glass plate structure, in which, when a lowest resonant frequency of the first exciter is F1(0) (Hz), and a lowest resonant frequency of the second exciter is F2(0) (Hz), the exciter-equipped glass diaphragm satisfies: 3≤|F1(0)−F2(0)|≤100 (Hz).

An apparatus includes a vibration member, a vibration apparatus configured to vibrate the vibration member, a supporting member at a rear surface of the vibration apparatus and the vibration member, the supporting member including a hole region overlapping the vibration apparatus, an enclosure configured between the vibration member and the supporting member to surround the vibration apparatus, and a pad member between the vibration apparatus and the hole region of the supporting member. The pad member may be connected to one or more of the rear surface of the vibration apparatus and the supporting member.

The present disclosure discloses a speaker box including a cover fixed between the frame and the magnetic circuit system; the cover includes a bottom wall set at a bottom of the speaker unit and a side wall extending from the bottom wall and set at a side of the speaker unit; the vibration system, the frame, the cover and the magnetic circuit system enclosing a internal space of the speaker unit; the cover is hot pressed from polyethylene glycol terephthalate film, the bottom wall is provided with an array of first leakage holes communicating the internal space and the rear cavity, the side wall is provided with an array of second leakage holes communicating the internal space and the rear cavity. The speaker box can be flexibly applied to a variety of complex shapes of the housing and can enhance the filling amount of sound-absorbing powder.

The invention provides a sound production device and electronic equipment. The sound production device comprises a first transducer and a second transducer, the first transducer comprises a first base and a first vibration assembly, the outer periphery of the first vibration assembly is fixed to the first base, the second transducer comprises a second base and a second vibration assembly, and the second vibration assembly is fixed to the second base. The second vibration assembly and the first vibration assembly are oppositely arranged at an interval. A vibration space is defined by the middle of the first vibration assembly and the second transducer, an acoustic channel is defined by the second vibration assembly and the outer periphery of the first vibration assembly, and the vibration space is communicated with an external space through the acoustic channel. The sounding device is simple in structure and small in size.

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.

Disclosed is a loudspeaker, including: a casing, a driving unit, and a vibration unit. The driving unit is fixed to the casing and is drivingly connected with the vibration unit. The driving unit includes a plurality of driving beams, each of the plurality of driving beams includes a fixed region and an overhanging region. Each of the plurality of driving beams is connected with the casing through its fixed region, and each of the plurality of driving beams is connected with the vibration unit through its overhanging region.

This application provides a speaker module and an electronic device. The speaker module includes a first speaker and a second speaker. The first speaker includes a first magnetic circuit assembly, a first voice coil, and a first diaphragm assembly. The first magnetic circuit assembly includes a first magnetically conductive yoke and a first magnet. The first voice coil is disposed around the first magnet and connected to the first diaphragm assembly. The second speaker is stacked with the first speaker in a reverse direction. The second speaker includes a second magnetic circuit assembly, a second voice coil, and a second diaphragm assembly. The second magnetic circuit assembly includes a second magnetically conductive yoke and a second magnet. The second voice coil is disposed around the second magnet and connected to the second diaphragm assembly. The magnetic circuit poles of the first and second magnets are in the same direction.

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.

An electro-acoustic transducer includes a substrate, a MEMS device disposed on the substrate, and a membrane disposed on the MEMS device. The electro-acoustic transducer further includes a pair of internal connection pads that serve as a path for a signal to be supplied to a drive source; and one or more height adjustment pads disposed in a region of an upper surface of the substrate that overlaps with a fixed portion in plan view. A lower surface of the fixed portion is bonded to the upper surface of the substrate, and the internal connection pads and the height adjustment pad are interposed between the substrate and the fixed portion.

The present invention provides a sounding device having a frame, a vibration system, a magnetic circuit system, a front cover, a waterproof sealing ring and a waterproof and breathable spacer. The front cover includes a front cover body, a first through hole and a second through hole running through the front cover body, and a support wall of the front cover body. The waterproof and breathable spacer is fixed to the front cover body and completely covers the second through hole, the second through hole connects the front sound cavity with the back cavity. Compared with the related art, the sounding device of the to present invention is easy to assemble, has good waterproof performance, high reliability, and excellent acoustic performance.

The invention relates to a speaker (1) comprising a coil arrangement (2) with at least two voice coils (3a, 3b), a magnet system (4) and a membrane (10) being fixed to the coil arrangement (2) and the magnet system (4). The membrane (10) has a first compliance (c1) and together with the coil arrangement (2) causes a first resonance frequency (fres1) for an oscillation of the membrane (10). In addition, the speaker (1) comprises a second connector (14, 17, 17a, 17b, 24, 25a, 25b) with a second compliance (c2), which interconnects the voice coils (3a, 3b). The second connector (14, 17, 17a, 17b, 24, 25a, 25b) together with the voice coils (3a, 3b) causes a higher second resonance frequency (fres2) for the oscillation of the membrane (10). Moreover, the invention relates to an electronic sound signal circuit (18), which is designed to output coil signals (SO1, SO2) having a frequency dependent phase shift (φ). In addition, invention relates to a sound system comprising an electronic sound signal circuit and a speaker of the above kind and to a method for manufacturing a coil arrangement (2).

A MEMS acoustic sensing chip, a microphone, and an electronic device are disclosed in embodiments of the present disclosure. The MEMS acoustic sensing chip includes a substrate, a first diaphragm, a second diaphragm, a backplate, and a support structure, the substrate being provided with a back cavity; the first diaphragm, the second diaphragm, and the backplate are provided on one side of the substrate through the support structure, the first diaphragm and the second diaphragm are provided with an inner cavity therebetween, and the backplate is suspended in the inner cavity; the support structure is provided with a vent hole, the vent hole being in communication with the back cavity and being independent of the inner cavity; and at least one of the first diaphragm and the second diaphragm is provided with a release hole, which is in communication with the inner cavity.

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.

A diaphragm for a microspeaker has an organic polymer film layer in direct contact with one or both skin layers. The one or two skin layers independently include a block copolymer having a hard segment and a soft segment, wherein a portion of the hard segment is included in a crystalline physically crosslinked domain. The organic polymer film layer is not sticky at 25 DEG C. A method of making the diaphragm is also described. The method includes co-extruding the block copolymer and an organic polymer to provide a multilayer film comprising the one or two skin layers and the organic polymer film layer in direct contact with the one or two skin layers. A microspeaker including the diaphragm is also described.

The utility model discloses a three-dimensional (3D) ultrasonic sensor probe core, which comprises a shell, a vibrating diaphragm, a piezoelectric element and a plurality of ultrasonic receiving elements, the bottom of the shell is connected with the vibrating diaphragm, the shell is provided with a first through hole and a plurality of second through holes, the number of the second through holes is the same as that of the ultrasonic receiving elements, and the first through hole and the second through holes extend in the height direction of the shell; the piezoelectric element is arranged in the first through hole and is fixed on the vibrating diaphragm; the multiple ultrasonic receiving elements are arranged in the multiple second through holes in a one-to-one correspondence mode and fixed to the vibrating diaphragm or the side wall of the second through hole. The device is simple in structure, easy to manufacture and high in obstacle identification capability.

A speaker includes a first frame, a first vibration system, a second frame, a second vibration, and a magnetic circuit system separately driving the first vibration system and the second vibration system to vibrate and sound, the magnetic circuit system includes a lower plate fixed on the first frame, a main magnet stacked and fixed on the lower plate, a main pole plate stacked and fixed on the main magnet, a center auxiliary magnet stacked and fixed on the main pole plate, a center magnet stacked and fixed on the center auxiliary magnet, and an auxiliary pole plate stacked and fixed on the center magnet. Compared with the related art, the speaker disclosed by the present disclosure could increase the thickness of the center magnet and enhance the magnetic flux of the magnetic circuit system.

A speaker is provided. The speaker includes: a support portion, a magnetic circuit assembly, and a positioning assembly. The magnetic circuit assembly is connected to the support portion through the positioning assembly, and the magnetic circuit assembly vibrates relative to the support portion; and the positioning assembly includes two vibration transmission plates spaced apart in a vibration direction of the magnetic circuit assembly, and projections of the two vibration transmission plates along the vibration direction are symmetrical with each other.

The invention discloses an MEMS sensor, a microphone module and electronic equipment, and relates to the technical field of electronic equipment, the MEMS sensor comprises a substrate and at least one capacitor system arranged on the substrate, the capacitor system comprises a backboard, a first vibrating diaphragm and a second vibrating diaphragm, and the first vibrating diaphragm and the second vibrating diaphragm are arranged on the two sides of the backboard; a connecting column is arranged between the first vibrating diaphragm and the second vibrating diaphragm, and under the connection of the connecting column, the connecting rigidity between the first vibrating diaphragm and the second vibrating diaphragm is greater than the vibrating diaphragm bending rigidity of the first vibrating diaphragm and the second vibrating diaphragm; and / or, the distance between the back plate and the first vibrating diaphragm is a first polar plate distance, the distance between the back plate and the second vibrating diaphragm is a second polar plate distance, the first polar plate distance is in negative correlation with the vibrating diaphragm bending rigidity of the first vibrating diaphragm, and the second polar plate distance is in negative correlation with the vibrating diaphragm bending rigidity of the second vibrating diaphragm. The invention provides an MEMS sensor. The MEMS sensor solves the technical problem that the sensitivity of vibrating diaphragms of an existing MEMS sensor is inconsistent.

A piezoelectric microelectromechanical systems device can include a cavity bounded by walls and an asymmetrical bimorph structure at least partially spanning the cavity that includes at least a piezoelectric layer and two electrode layers. The electrode layers can have relative thicknesses configured to compensate for expected temperature stress in the bimorph structure. Thus, metals having different thicknesses can be positioned and configured to compensate deflection due to thermal stress of any or all of the piezoelectric layer, the first metal layer, and second metal layer and a substrate. A method for making the piezoelectric microelectromechanical systems device is also provided.