138results about "Diaphragm construction" patented technology

A sound control system includes a sound generating device disposed at a vehicle ceiling corresponding to a seat region of the vehicle and at a sound space formed within the vehicle to correspond to the seat region, and a sound processing circuit for providing a vibration driving signal to the sound generating device. The sound generating device vibrates an interior material of the vehicle ceiling based on the vibration driving signal.

To provide a film for acoustic component that can be peeled off without tearing from the release film when the release film is peeled off before molding, while maintaining high shape retention before molding and high formability and mold-following property during molding.SOLUTION: A film for acoustic component is curable and has the following (a) viscoelastic properties. (a) Storage modulus E' at a measurement temperature of 20°C and a frequency of 10 Hz is between 0.1 MPa and 500 MPa.SELECTED DRAWING: None

Rubber diaphragm, sound device and application thereof are provided; rubber diaphragm includes distortion improving agent with mass percentage of 0.5-50%; distortion improving agent is random linear polymer with more than two monomer components randomly arranged on main chain, and distortion performance is synergistically regulated by monomer components; end group and / or side group and side chain of distortion improving agent includes special chemical reaction crosslinking points with mass percentage of 0.01-20, and number average molecular weight of distortion improving agent is 500-1200000; and distortion improving agent or main chain thereof is prepared by one-step method. Rubber diaphragm includes distortion improving agent, which is random linear polymer that components are randomly arranged on main chain. Sound device of rubber diaphragm is used to reduce distortion of low-frequency band obviously while maintaining good frequency response characteristics; and preparation method of distortion improving agent is simple, low in cost and has wide application.

A transducer assembly comprising: a laterally offset arrangement of different size transducers, the different size transducers comprising at least a first transducer having a diaphragm of a first size arranged in a first direction and a pair of transducers each having a diaphragm of a second size arranged in a second direction to output sound when driven by respective audio signals, and wherein a force produced by the first transducer is cancelled by a sum of forces produced by the pair of transducers when the transduces are driven by the audio signals.

An MEMS microphone includes a substrate with a back cavity and a capacitor system arranged on the substrate. The capacitor system includes a back plate and a diaphragm opposite to and spaced apart from the back plate. Surface of the back plate facing diaphragm or surface of diaphragm facing the back plate being provided with an anti-adhesion member. When the diaphragm moves until the anti-adhesion member is in contact with the diaphragm and the back plate at the same time, the anti-adhesion member is elastically deformable along a vibrating direction of the diaphragm. The anti-adhesion member of the present disclosure is elastic and may provide cushioning for movement of the diaphragm, which prevents rapid concentration of stress at a position of the diaphragm in contact with the anti-adhesion member, thereby preventing formation of pits in the diaphragm and preventing breakage of the diaphragm under repeated impact of the anti-adhesion member.

The invention discloses a nonlinear acoustic transducer control method and system based on an Aubry-Mather set, and belongs to the technical field of acoustic transducers. The method comprises the following steps: firstly, based on an Aubry-Mather set theory, constructing a nonlinear vibration model used for describing nonlinear vibration of a transducer diaphragm; secondly, based on a nonlinear vibration model, regional piezoelectric driving and dynamic phase regulation are carried out to simulate a quasi-periodic fluctuation mode; then, on the basis of fluctuation characteristics disclosed by the nonlinear vibration model, a multi-diaphragm collaborative vibration system is constructed, and quasi-periodic superposition of sound waves is realized by optimizing diaphragm space layout; and finally, based on stiffness parameters in the nonlinear vibration model, integrating a micro electro mechanical system (MEMS) process and a nonlinear material, and realizing equivalent nonlinear stiffness on a physical device through gradient polarization design. The dynamic adaptability, the energy transfer efficiency and the high-frequency output performance of the transducer in a broadband range are effectively improved, and the transducer is particularly suitable for ultrasonic imaging and other high-frequency acoustic application scenes.

To provide a prepreg which enables manufacture of a laminated type diaphragm without using an adhesive, and a diaphragm using the prepreg.SOLUTION: A prepreg has a carbon fiber and an impregnation resin, where the impregnation resin is a thermoplastic resin containing acid-modified polypropylene. A diaphragm 3 can be manufactured by laminating a prepreg 2 on at least one surface of a foam 1.SELECTED DRAWING: Figure 1

The present application belongs to the technical field of electroacoustic transducers for headphones. Provided is an annular dual-suspension quad-magnet planar magnetic driver for an in-ear headphone. The annular dual-suspension quad-magnet planar magnetic driver comprises an upper driver cap, an upper driver magnetic circuit, a rigid thin piece, a dual-suspension diaphragm, an electrically conductive voice coil, an annular bracket, a lower driver magnetic circuit, a pole plate and a lower driver cap, wherein the upper driver cap, the upper driver magnetic circuit, the rigid thin piece, the dual-suspension diaphragm, the electrically conductive voice coil, the annular bracket, the lower driver magnetic circuit and the pole plate are sequentially stacked and assembled together. The present application has the advantages of small size, high sensitivity and high output sound pressure level.

A rubber sound film, and a sound production device and a use thereof. The rubber sound film contains 0.2-60% by mass of a distortion improver. The distortion improver is a block polymer, and an end group or at least one block component of the distortion improver comprises 0.02-25% by mass of a special chemical crosslinking site at which a chemical reaction can occur. The number average molecular weight of each block of the distortion improver is from 300 to 100,000. The distortion improver can be accurately prepared by means of living polymerization or the main body structure can be accurately prepared by means of living polymerization. The rubber sound film contains the distortion improver, and the structure and the content of the special chemical crosslinking site of the distortion improver are accurately controllable, so that the position, height, and width of a damping peak thereof are accurately controllable, and the damping characteristics of the obtained rubber sound film are accurately controllable. When the rubber sound film is applied to the sound production device, the distortion in a low-frequency band can be accurately reduced while good frequency response characteristics are maintained, and the rubber sound film has high controllability, stable performance, and extremely board application range.

A display device is disclosed. An object of the present disclosure is to match reproduction frequency bands of sounds output from a plurality of speakers. Another object of the present disclosure is to match magnitudes of sounds output from a plurality of speakers. According to at least one aspect of the present disclosure, the present disclosure can match reproduction frequency bands of sounds output from a plurality of speakers. According to at least one aspect of the present disclosure, the present disclosure can match magnitudes of sounds output from a plurality of speakers.

Provided is a fabric which, when used as a fabric for adjusting the back pressure of a speaker, an earphone, or the like, effectively prevents leakage of sound to the outside and intrusion of external noise, and which has little variation in acoustic characteristics. A woven fabric comprising warp yarns and weft yarns, the woven fabric being characterized in that the air permeability resistance is 0.3 kPa.s / m or more and 5 kPa.s / m or less, and the tolerance of the air permeability resistance of the woven fabric is within + / -10%. Furthermore, the fabric is characterized in that at least one of the warp yarn and the weft yarn is a multifilament yarn. Furthermore, the woven fabric is characterized in that the multifilament yarn is an untwisted yarn which is not twisted.

A vibrating device may include a vibrating member and a vibrating element configured to vibrate the vibrating member and including a vibrating portion. The vibrating portion includes a piezoelectric material and an electrostrictive material. The electrostrictive material includes materials represented by the following Chemical Formula 1 and Chemical Formula 2, and the piezoelectric material includes materials represented by the following Chemical Formula 3 and Chemical Formula 4. [Chemical Formula 1] (PbA-BCB) (Mg1 / 3Nb2 / 3) aO3 [Chemical Formula 2] (PbA-BCB) (D1 / 3E2 / 3) bO3 [Chemical Formula 3] (PbA-BCB) (Zrc) O3 [Chemical Formula 4] (PbA-BCB) (Tid) O3, in Chemical Formula 1 to Chemical Formula 4, "C" is one of calcium (Ca), strontium (Sr) and barium (Ba), "D" is one of nickel (Ni), manganese (Mn), magnesium (Mg) and cobalt (Co), "E" is niobium (Nb) or tantalum (Ta), in Chemical Formula 1 to Chemical Formula 4, "a + b + c + d" is equal to 1, and the ratio of "a + b" to "c +

An MEMS microphone, comprising: a substrate provided with a back cavity (11) and a capacitance system arranged on the substrate. The capacitance system comprises a back plate (2) and a diaphragm (3) arranged opposite and spaced apart from the back plate (2), wherein the surface of the back plate (2) facing the diaphragm (3) or the surface of the diaphragm (3) facing the back plate (2) is provided with dimples (4), characterized in that when the diaphragm (3) moves to enable the dimples (4) to simultaneously come into contact with the diaphragm (3) and the back plate (2), the dimples (4) can elastically deform in the vibration direction of the diaphragm (3). The dimples (4) of the MEMS microphone have elasticity, which can provide a buffer for the movement of the diaphragm (3), and thus avoids rapid concentration of stress on the position where the diaphragm (3) is in contact with the dimples (4), thereby preventing pits from forming on the diaphragm (3) and preventing the diaphragm (3) from breaking under the repeated impact of the dimples (4).

An attenuator is disclosed that enables a microphone's relatively undistorted pick up of a voice that is generated in close proximity to the microphone. This attenuator is a key component of a groundbreaking assistive device or handset / headset that empowers individuals with speech impairments to effectively communicate and reintegrate into society. By leveraging advanced acoustic hardware, intelligent voice algorithms, and a comprehensive image-or-vocabulary-to-impaired-voice database, the handset / headset facilitates understanding the user's impaired speech by harvesting understood terminology and outputting the same in a communicative context. Thus, the handset / headset enables seamless public interaction, independence, and improved quality of life to the user with speech impediments and ensures equal participation and inclusion in everyday verbal interactions.

Disclosed are a composite piezoelectric element and an electronic device having the composite piezoelectric element, wherein the composite piezoelectric element includes an insulating film and a piezoelectric body arranged alternately, wherein the piezoelectric body can be classified as a general piezoelectric body and a finger scan recognition piezoelectric body, the general piezoelectric body is used as at least one of a tactile actuator, a speaker actuator, and an earpiece actuator, and the finger scan recognition piezoelectric body is used for finger scan recognition.

An audio transducer assembly and an apparatus incorporating the same are disclosed. The assembly includes an audio transducer, comprising a diaphragm and a transducing mechanism, which is substantially encapsulated by a metallic enclosure. The enclosure is an integrally formed unit that provides structural reinforcement to a host apparatus, such as a slender housing of a wearable device. To ensure a durable interface, the enclosure may feature a profiled edge region that facilitates a stress-reducing junction with the housing. In some embodiments, the transducer is an armature-type transducer where the diaphragm is rigidly coupled to a pivoting armature. Apertures in the enclosure provide an acoustic pathway from the diaphragm to an exterior of the housing, allowing the assembly to function as a loudspeaker or a microphone.

A rear bowl is forwards connected with a large cylinder, a gap at the bottom of the large cylinder supports a middle cylinder, U iron is installed in the rear bowl in a supporting mode, magnetic steel and a pole plate are positioned and supported in a step hole of the U iron, a voice diaphragm is arranged above the pole plate, and a phase plug is arranged above the voice diaphragm. The horizontal edge of the periphery of the voice diaphragm is pressed and supported on the upper end face outside the U-iron stepped hole through the phase plug periphery supporting ring, the large cylinder is connected with the upper end face of the phase plug periphery supporting ring in a pressing mode and does not make contact with the upper end face outside the U-iron stepped hole, the portion, above the phase plug, of the bottom of the large cylinder is of a ventilation structure communicated with the interior of the middle cylinder, and an upper opening of the ventilation structure is not an externally-expanded horn mouth. The middle cylinder coaxially covers the ventilation structure in a clearance mode, the center of the inner top wall of the middle cylinder protrudes downwards and is provided with a sound dividing head with an arc-shaped section, and the diameter of the arc-shaped bottom circumference is not smaller than the diameter of an upper opening of the ventilation structure. The ventilation structure on the phase plug is arranged to be a closing-up structure, and the lower convex sound dividing head completely corresponding to the closing-up circumference is matched, so that the requirement of simulating exhaust roars of an oil cylinder of a fuel vehicle through instant high-frequency sound production can be met.

A speaker system with a slantingly disposed and circularly curved reflection chamber includes an enclosure, a speaker driver mountable at the front side of the enclosure, and a housing mountable at the rear side of the enclosure. The front side of the speaker driver forms a reference plane on a coordinate plane defined by a transverse axis and a longitudinal axis. The reflection chamber is formed at the front side of the housing, has a three-dimensional circularly curved configuration, has a portion located in the paths along which the speaker driver's acoustic waves propagate in the enclosure, so as to reflect such acoustic waves, and can be tilted with respect to the transverse axis and / or the longitudinal axis to form a transverse-direction angle and / or a longitudinal-direction angle between the reflection chamber and the reference plane. Accordingly, the asymmetric internal structure suppresses standing waves formation, improving the speaker system's acoustic performances.

This application discloses a speaker and a headset, and belongs to the field of audio technologies. The headset includes a speaker, and the speaker includes a first magnetic body, a second magnetic body, a basket, a first voice coil, a first diaphragm, a second voice coil, and a second diaphragm. The first magnetic body is disposed around an outer circumference of the second magnetic body. The basket includes a peripheral part and a basket top connected to the peripheral part. The peripheral part is disposed around an outer circumference of the first magnetic body. The first voice coil is connected to the first diaphragm. The first magnetic body and the basket top are combined to form a magnetic loop with the second magnetic body. The first voice coil, the first magnetic body, the second magnetic body, and the basket top are fitted to drive the first diaphragm to vibrate. The second voice coil is connected to the second diaphragm. A partial structure of the second voice coil extends into a first magnetic gap. A magnetic loop is formed between the first magnetic body and the peripheral part. The second voice coil, the first magnetic body, and the peripheral part are fitted to drive the second diaphragm to vibrate. This application helps reduce a volume of the headset, and facilitates miniaturization of the headset.

The diaphragm involved in the present invention includes an intermediate layer and a coating coated on both surfaces of the intermediate layer. The intermediate layer is a carbon graphite / carbon nanotube layer, and the coating is a diamond-like coating. The carbon nanotubes are interwoven to form a porous membrane with a macroscopic membrane-like morphology and a microscopic network structure. The carbon graphite is interspersed in the internal gaps of the carbon nanotube porous membrane. The carbon graphite and carbon nanotubes together form a carbon graphite / carbon nanotube layer with a relatively dense internal structure. The diamond-like coating has high specific elasticity, high bending rigidity and high internal damping. The obtained diaphragm has good acoustic effect, good moisture-proof performance, good mildew resistance, low production cost and simple preparation method.

An inlay for a component carrier includes a gas-permeable porous layer structure, an upper layer structure, arranged on the gas-permeable porous layer structure, the upper layer structure defining a cavity such that a portion of the gas-permeable porous layer structure is exposed and an upper metal layer structure arranged on the upper layer structure. A component carrier with the inlay and manufacturing methods of the inlay and the component carrier are described.

An integrated passive radiator loudspeaker module and an ultrathin sound equipment, comprising an inner basket, an outer extension basket and a ring-shaped passive radiator; the inner basket is used for mounting a loudspeaker unit; the outer extension basket is concentrically arranged at the periphery of the inner basket and is rigidly connected with the inner basket through a plurality of connecting columns; the ring-shaped passive radiator is arranged between the inner basket and the outer extension basket, an inner R ring of the ring-shaped passive radiator is integrally vulcanized with an R ring on the outer side of the sound cone of the loudspeaker and is fixed to the inner basket, and an outer R ring of the ring-shaped passive radiator is fixed to the outer extension basket; the loudspeaker and the passive radiator are integrated into a module, the mounting process is simplified, the production efficiency and product consistency are improved, and the cabinet is extremely thinned through the outer extension basket structure.

Provided is a manufacturing method for a speaker diaphragm, a speaker diaphragm, and a speaker whereby, even when a hole is opened, insulation properties can be ensured, and rigidity can also be ensured. The method for manufacturing a speaker diaphragm according to the present invention is a method for manufacturing a speaker diaphragm including: a conductive layer (21) that includes a through-hole (31) for passing a tinsel wire; and resin layers (22) disposed so as to sandwich the conductive layer (21). The method comprises: a first step for providing the through-hole (31) in the conductive layer (21); and a second step for closing a mold (30) provided with a convex punch (P) having a diameter smaller than that of the through-hole (31), thereby causing the punch (P) to press the resin layers (22) against a laminate (M1) on an inner side of the through-hole (31). In the second step, due to the pressing of the punch (P), leaked material (40) of the resin layers (22) flows in an inside surface direction of the through-hole (31), and flows into a void portion near an outside surface of the punch (P).

An electronic device according to an embodiment of the present invention may include a housing and an acoustic module disposed inside the housing. The acoustic module may include: a speaker unit including a vibration plate; a speaker housing for accommodating the speaker unit; the porous air adsorption component is arranged in the loudspeaker shell; and an air-permeable damping member disposed inside the speaker housing and stacked with the air-absorbing member.

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.

To provide wholly aromatic polyamide fiber having moderate binder strength and a speaker diaphragm having moderate bending strength.SOLUTION: A wholly aromatic polyamide fiber is characterized by having a BET specific surface area measured after drying in an air atmosphere of 30 m2 / g or more and 100 m2 / g or less.SELECTED DRAWING: Figure 1

The application discloses a sound generating device and electronic equipment, and relates to the technical field of electroacoustic transduction. The sound generating device comprises a yoke, a vibration system, a terminal assembly and an inductor assembly. The yoke is provided with a mounting space. The vibration system vibrates along a first direction. The vibration system comprises a diaphragm and a voice coil connected to the diaphragm. The outer periphery of the diaphragm is connected to one end of the yoke. The terminal assembly is arranged on the yoke. One end of the terminal assembly is connected to the lead wire of the voice coil. The other end of the terminal assembly is used for being connected to an external circuit. The inductor assembly is arranged in the mounting space. The inductor assembly is connected in series with the voice coil through the terminal assembly. The axial direction of the inductor assembly is parallel to the first direction. The sound generating device can save product arrangement space and improve the utilization rate of the occupied space.

A dual compression driver includes a first driver assembly having a first annular diaphragm disposed about a central axis and a first phase plug disposed coaxially below the first annular diaphragm, the first phase plug having a first plurality of apertures extending therethrough; and a second driver assembly having a second annular diaphragm disposed about the central axis and a second phase plug disposed coaxially over the second annular diaphragm, the second phase plug having a second plurality of apertures extending therethrough. A common annular magnet is disposed between the first driver assembly and the second driver assembly. A rear cover is mounted to the first phase plug and a front adapter is mounted to the second phase plug and includes a hollow conduit formed therein that defines a circular outlet of the dual compression driver. Acoustic signals from the first plurality of apertures and the second plurality of apertures are combined and radiated through the hollow conduit to the circular outlet.