34results about "Diaphragm damping" patented technology

The present invention discloses a micro-electromechanical system (MEMS) loudspeaker, which includes a supporting structure, a diaphragm and a barrier plate. The supporting structure includes a supporting body and a sound hole penetrating from one end of the supporting body to the other end. The diaphragm is fixed on an inner circumferential side of the supporting body and located in the sound hole. The diaphragm is configured to vibrate and generate amplitude-modulated ultrasonic waves. The barrier plate is covered and fixed to one end of the supporting body. Due to the distance between the barrier plate and the diaphragm, the amplitude-modulated ultrasonic waves are demodulated to obtain modulated sound waves. Thereby improving the sound wave demodulation efficiency and amplitude of the MEMS loudspeaker and further improving the acoustic performance of the MEMS loudspeaker.

Provided is a woven fabric that effectively prevents sound leakage to the outside and intrusion of external noise and has little variation in the acoustic property when used as a woven fabric for adjusting the back pressure of a speaker, earphones, and the like. Provided is a woven fabric including a warp thread and a weft thread, the woven fabric having a airflow resistance of 0.3 kPa·s / m or more and 5 kPa·s / m or less, and the woven fabric having a tolerance of the airflow resistance within ±10%. In the woven fabric, at least one of the warp thread and the weft thread is a multifilament thread. In the woven fabric, the multifilament thread is a non-twisted thread without twists.

A loudspeaker includes: a diaphragm; a magnetic circuit; a frame that holds the magnetic circuit; an edge that is annular and connects the diaphragm and the frame; and a voice coil body that is disposed in a magnetic gap of the magnetic circuit. The diaphragm includes: a central portion; and an outer-circumferential portion that is provided as a single piece together with the central portion in an outer periphery of the central portion, and is bonded to the edge at a location in a vicinity of the central portion.

The application discloses a vibrating diaphragm, a loudspeaker and an electronic device. The vibrating diaphragm comprises a plurality of diaphragm layers, the diaphragm layers are stacked, each diaphragm layer comprises a substrate and silica gel, the substrate is a porous structure, a first part of the silica gel is inlaid in the substrate, and the modulus of the silica gel is different from that of the substrate; at least one damping layer is arranged between any two adjacent diaphragm layers, and the damping layer is composed of a material with a pressure-sensitive damping function; and a second part of the silica gel covers one side of the substrate away from the damping layer.

Devices, methods, and systems are described for an anti-feedback audio device (100) comprising a dipole speaker (110) having an acoustically null sound plane (115) or acoustically null sound area (117), a first microphone (120) disposed substantially within the acoustically null sound plane (115) or acoustically null sound area (117), and a neural network (130) communicatively coupled to the dipole speaker and the first microphone (120) such that a first output from the first microphone is communicated to the neural network (130) for processing, and a second output from the neural network (130) is communicated to the dipole speaker (110). The combination of the dipole phase cancellation and the neural network gives an unexpected result of an extremely high signal-to-noise ratio for speech over noise.

A loudspeaker transducer diaphragm or cone (e.g., 201, 301 or 401) is configured with arcuate protrusions that project distally from the main forward or distal surface 230 to provide stiffening and a break-up of resonant vibration modes when the loudspeaker is in use. The protrusions (e.g., 210, 310 or 410) are convex on one surface 230 and concave on the opposite surface 234, so their average thickness is similar to the frustoconical areas of the cone, i.e. they are shell-like in nature rather than solid mounds or walls. The protrusions 210 are generally curved as they run radially from the inner opening 204 to the outer peripheral edge to encourage modal break-up (suppressing strong vibrational modes, e.g., as in region 155).

Vibration device (100, 200, 300, 400, 500, 600), comprising: a glass membrane (11, 11A, 11B, 11C, 11D, 11E, 11F); an excitation device (13) attached to the glass membrane (11, 11A, 11B, 11C, 11D, 11E, 11F) which sets the glass membrane (11, 11A, 11B, 11C, 11D, 11E, 11F) into vibration; an enclosure element (15, 15A, 15B, 15C, 15D, 15E) that defines an interior space (19) by enclosing a section, including a mounting position of the excitation device (13), of the glass membrane (11, 11A, 11B, 11C, 11D, 11E, 11F), wherein an end section of the glass membrane (11, 11A, 11B, 11C, 11D, 11E, 11F) is exposed through an opening (21) of the interior space (19) to the outside of the interior space (19); and a shielding element (17) for sound shielding between the opening (21) and the glass membrane (11, 11A, 11B, 11C, 11D, 11E, 11F), wherein the shielding element (17) divides the glass membrane (11, 11A, 11B, 11C, 11D, 11E, 11F) into an excitation area (A1) located inside the interior (19) and a vibration area (A2) located outside the interior (19).

Audio devices and systems are disclosed. An example audio device includes: a speaker having a diaphragm that forms an acoustically null sound plane; a microphone disposed within the acoustically null sound plane; and one or more processors communicatively coupled to the microphone, and to the speaker. The one or more processors execute one or more neural networks, wherein the one or more neural networks are trained for feedback reduction in acoustically null sound planes.

The present disclosure provides a vibration sensor including a vibration assembly including a mass element and an elastic element, a first acoustic chamber, an acoustic transducer, and a buffer member. In response to an external vibration signal, the vibration assembly vibrates such that a volume of the first acoustic chamber changes. The acoustic transducer is in communication with the first acoustic chamber. In response to a volume change of the first acoustic chamber, the acoustic transducer may generate an electrical signal. The buffer member is connected to the mass element or the elastic element. The buffer member reduces an impact force of the mass element acting on the elastic element during a vibration process of the vibration assembly. The acoustic transducer has a first resonance frequency, the vibration assembly has a second resonance frequency, and the second resonance frequency is less than the first resonance frequency.

A sound apparatus comprises a first vibration device which vibrates by an input driving signal, a first substrate including a first main surface and a second main surface facing each other, wherein the first vibration device is disposed on at least a portion of the first main surface of the first substrate, a second substrate including a first main surface and a second main surface facing each other, wherein a portion of the first main surface of the second substrate is disposed to be adjacent to a portion of the second main surface of the first substrate, a second vibration device disposed on at least a portion of the second main surface of the second substrate and vibrates by the input driving signal, a vibration member, a first elastic member connecting the first substrate and the vibration member, and a second elastic member connecting the first substrate and the vibration member.

A method of forming a micro-electromechanical system (MEMS) device includes: providing a substrate comprising a first surface and a second surface opposite to the first surface; forming a cavity in the substrate, the cavity extending between the first surface and the second surface; forming an interconnection structure on the first surface of the substrate and over the cavity; and forming a proof mass in the cavity, connected to the interconnection structure, the proof mass having a thickness which is smaller than a thickness of the substrate.

A loudspeaker diaphragm (12) comprising a woven fibre body supports damping material (25), for example PVA polymer, on a rearward-facing surface (24). The woven fibre body may be formed of lengths (14) non-metallic fibre material (for example glass fibre) coating with a thin metal coating (32). The mass of the layer of damping material (25) may be significantly greater than the mass of the woven fibre body. An attractive sparkly looking loudspeaker diaphragm (12) may thus be provided which damps undesirable vibration whilst providing a flatter frequency-response curve (50).

The embodiment of the application discloses a loudspeaker, which comprises a folded ring, and a rib structure is arranged on the folded ring. The embodiment of the application can reduce the segmented vibration of the loudspeaker by arranging the rib structure on the folded ring, thereby effectively improving the mid-frequency valley problem and reducing the nonlinear distortion. In addition, the loudspeaker has the advantages of good product consistency, simple process, saving of labor, low cost and the like.

An electro-acoustic transducer includes: a housing, a partition member disposed inside the housing, a first electro-acoustic conversion unit, and a second electro-acoustic conversion unit. The first electro-acoustic conversion unit includes a fixed electrode, a vibrating membrane, and a support member that supports a partial region of the vibrating membrane and brings a part of the vibrating membrane in contact with the fixed electrode. The first electro-acoustic conversion unit and the second electro-acoustic conversion unit are disposed facing each other across the partition member so that a sound emitting part and a sound emitting part communicate with an acoustic outlet, and the partition member supports the support member and the support member.

A combined MicroElectroMechanical structure (MEMS) includes a first piezoelectric membrane having one or more first electrodes, the first piezoelectric membrane being affixed between a first holder and a second holder; and a second piezoelectric membrane having an inertial mass and one or more second electrodes, the second piezoelectric membrane being affixed between the second holder and a third holder.

Speaker devices and systems are disclosed. An example speaker device includes a diaphragm that outputs an acoustic wave that represents audio, a first structure that includes the diaphragm, and a second structure that includes a planar surface. At least one of the first structure or the second structure rotates relative to the other one of the first structure or the second structure to selectively arrange the first structure and the planar surface at an angle relatively to each other within a range from 0 degrees to 180 degrees.

A speaker diaphragm includes a base material including a resin matrix including a thermoplastic resin as a main component, and fibers dispersed within the resin matrix. The fibers include a plurality of loss regions where the fibers are locally bent and broken, or a plurality of loss regions having a diameter 5% to 50% larger than an average diameter of the fibers

A Micro-Electro-Mechanical System (MEMS) die includes a substrate; a back plate mounted to the substrate and partially covering an aperture through the substrate; a diaphragm between the back plate and the substrate, the diaphragm comprising a central portion covering the aperture and an outer peripheral portion coupled to the substrate; a plurality of springs connecting the central portion of the diaphragm to the outer peripheral portion of the diaphragm, each spring located outwardly of the aperture; and a plurality of deflection limiters protruding from the back plate. The plurality of deflection limiters is located and configured to at least momentarily contact the diaphragm proximate the plurality of springs during operation of the MEMS die.