99results about "Electrets selectrostatic transducer" patented technology

Provided herein is technology relating to measuring weather data and particularly, but not exclusively, to apparatuses, methods, and systems for sensing hydrometeors (e.g., rain) and measuring hydrometeor characteristics (e.g., volume, rate, size distribution, etc.).

The utility model discloses polarization equipment for microphone parts, which relates to the technical field of microphone production equipment and comprises a rack, a polarization device is mounted on the rack and comprises a horizontally arranged turntable, a plurality of stations are arranged on the peripheral side of the turntable at equal intervals, each station is provided with a material placing tool, and the material placing tools are arranged on the turntable. A plurality of material placing grooves are formed in the material placing tool; wherein one station is provided with a feeding device connected with the material placing tool, the station located at the downstream of the feeding device is provided with a polarization electrode assembly, and the polarization electrode assembly comprises polarization electrodes corresponding to the material placing grooves. And a discharging assembly is arranged at a station at the downstream of the polarized electrode assembly. According to the utility model, materials polarized by the polarization equipment for microphone components are good in consistency, so that produced microphones are good in consistency and high in qualified rate.

The invention relates to an implantable microphone and an artificial cochlea prosthesis. The implantable microphone comprises a housing, one end of the housing is provided with a recessed part, and the bottom wall of the recessed part is provided with a through hole; the diaphragm is arranged on the shell and seals the concave part; the sensor is arranged in the shell and located at the position of the through hole, and a closed containing cavity is defined by the sensor, the concave part and the diaphragm; the port circuit is arranged in the shell and is electrically connected with the sensor; and the functional element is arranged on at least one side of the diaphragm and is electrically connected with the port circuit, and the functional element can drive the diaphragm to deform after being electrified. When the pressure of the environment where the implantable microphone is located changes, the functional element can generate bending deformation opposite to the deformation of the diaphragm after being electrified, so that the stability of a signal generated by the implantable microphone is ensured, the working reliability and stability of the implantable microphone are improved, and the use performance is ensured.

The invention discloses a sound pickup system with adjustable beam directivity, a method, equipment and a medium, and the system comprises a front-end sound signal collection module, a middle-end sound signal processing module and a rear-end sound signal output module, the front-end sound signal acquisition module comprises an audio coding and decoding Codec chip, a plurality of omnidirectional pickup electret microphones and a plurality of directional pickup electret microphones, and the omnidirectional pickup electret microphones and the directional pickup electret microphones are sequentially distributed in a staggered mode at equal intervals along a straight line. The omnidirectional pickup electret microphones and the directional pickup electret microphones are connected with the input end of the audio coding and decoding Codec chip, and the middle-end sound signal processing module is connected with the output end of the audio coding and decoding Codec chip and the rear-end sound signal output module. The system, the method, the equipment and the medium can ensure the audio monitoring quality and customer requirements.

The invention relates to a method for manufacturing a transducer unit (1), in particular a MEMS transducer unit, for converting electrical signals into displacements and / or displacements into electrical signals, in which at least one transducer element (3) is arranged on a carrier element (2), and the transducer element (3) is coupled to a membrane unit (5) that is deflectable along a stroke axis (H). According to the invention, to form at least one flexible membrane element (14), a flowable and curable membrane material is cast at least section by section onto a reinforcement element (4) of the membrane unit (5) that is coupled or can be coupled to the transducer element (3), so that the membrane element (14) together with the reinforcement element (4) at least partially forms the membrane unit (5). The invention further relates to the transducer unit (1).

Device with a microelectromechanical system (MEMS) comprising the following: a first record (101), a second plate (105) which is arranged above the first plate (101), a first movable plate (102) arranged between the first plate (101) and the second plate (105), and a second movable plate (103) arranged between the first movable plate (102) and the second plate (105), the MEMS device comprising a first input / output node coupled to the first plate (101), a second input / output node coupled to the second plate (105), a third input / output node coupled to the first movable plate (102), and a fourth input / output node coupled to the second movable plate (103), wherein the first input / output node is different from the second input / output node, and wherein the third input / output node is different from the fourth input / output node, wherein the first movable plate (102) is rigidly coupled to the second movable plate (103), wherein the first movable plate (102) is designedto be shielded from capacitive coupling with the second movable plate (103).

Methods, devices, and processor-readable media for adjusting one or both of a listening experience and a conversation experience, including: processing a user device audio signal representing a sound segment received at a microphone of a user's portable user device, where the sound segment propagates as an acoustic wave between a smart device and the user; an action based on the processing is performed.

Charged polymeric webs, such as electret webs, include a thermoplastic resin and a charge-enhancing additive. The additives are substituted heterocyclic thiolate salts. The heterocyclic thiolate salt has 2 nitrogen groups and a third group that may be an NH, N—NH2, O, or S group. The substituent group is an aromatic or heterocyclic aromatic group. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media.

A sensing arrangement for detection of electrical discharges in an electrical apparatus is described. The sensing arrangement includes an acoustic sensor and a signal enhancing structure with a funnel region. The acoustic sensor is positioned outside the funnel region on an apex side of the funnel region. An electrical switchgear is described. The electrical switchgear includes a sensing arrangement for detection of electrical discharges in an electrical apparatus. The sensing arrangement includes an acoustic sensor and a signal enhancing structure with a funnel region.

The invention provides an MEMS acoustic sensor and a use method thereof, and the MEMS acoustic sensor comprises a packaging structure which is internally provided with a light generation assembly, an acoustic vibration device and a light sensing assembly. Wherein the acoustic vibration device is used for pickup and vibration; moreover, in the vibration process of the acoustic vibration device, light emitted by the light generation assembly is reflected by the acoustic vibration device and then irradiates different sensing positions on the light sensing assembly, and the light sensing assembly generates corresponding electric signals based on the irradiated sensing positions. The MEMS acoustic sensor can solve the problem that an existing MEMS acoustic sensor is low in sensitivity.

Provided is an electrode layer-forming composition, a laminate body, uses thereof, and a production method thereof, which can form an electrode layer having viscoelastic properties sufficient for practical use, which can be coated with a hot-melt process, which has excellent adhesion to a dielectric layer, conformability, and shape retention properties to the resulting electrode layer, and which is unlikely to cause problems such as peeling or defects in the electrode layer even when used in a transducer. A hot-melt electrode layer-forming organopolysiloxane composition contains: (A) a linear organopolysiloxane; (B) an MQ type organopolysiloxane resin having a weight average molecular weight of 5000 or more in terms of a polystyrene standard; and (E) conductive fine particles. The composition is non-fluid at 25° C. and has heat melting properties. The amount of component (B) in the composition is 45 mass % or more relative to the entire composition.

Described herein are thermoplastic core-sheath fibers. The thermoplastic core-sheath fibers include a core having a coextensive sheath layer disposed thereon, the core including a first polymeric resin and a charge-enhancing additive, and the sheath layer including a second polymeric resin, with the proviso that when the second polymeric resin includes poly(4-methyl-1-pentene), the second polymeric resin does not include 100% by weight of poly(4-methyl-1-pentene). These thermoplastic core-sheath fibers can be used in filtration applications.

A system comprising sound wave sensors for high fidelity sound wave detection from any 3D directions and identification of 3D coordinates of sound sources, means to separate the sound emanations of each sound source with good to high fidelity, and means to reconstruct sound sources with good to high fidelity generally including its lobal patterns. The system enables microphones systems capable of detecting sound with substantially high linearity in frequency response, sensitivity, and directionality, combined with any desired form of volumetric sensing such as spherical, hemispherical, conic and so forth, including multiple defined lobes, or selecting any desired volume and shape. Sound wave sensors can comprise a multitude or combinations of system means such as sound beams, levitated bubble interactions, tethered bubble interactions, fibre interactions, laser interferometry, RF tuned circuit techniques, and so forth, wherein all such methods ultimately employ a form of bidirectional sound sensing means.

The utility model relates to an anti-interference electret microphone working circuit and an electret microphone. In the anti-interference electret microphone working circuit, a source electrode of a field-effect tube is connected with one end of a second resistor and one end of a third capacitor, a grid electrode of the field-effect tube is connected with one end of the third resistor, and a drain electrode of the field-effect tube is connected with one end of a fourth resistor and one end of a fifth resistor. The other end of the third resistor is connected with the positive end of the electret capacitor, the other end of the second resistor is connected with one end of the first resistor, one end of the first capacitor and one end of the second capacitor, and the other end of the first capacitor and the other end of the first resistor are connected with the positive terminal. And the negative electrode end of the electret capacitor, the other end of the fifth resistor, the other end of the fourth resistor, the other end of the second capacitor and the other end of the third capacitor are respectively grounded through a negative terminal. The anti-interference electret microphone working circuit provided by the utility model has good anti-interference capability through reasonable design.

To provide an electret film having high piezoelectricity and excellent in-plane uniformity of piezoelectricity, and a laminated piezoelectric sheet in which the electret film and an electrode are laminated.SOLUTION: With an electret film, an absolute value of a piezoelectric constant d33 is 40pC / N or more, and a coefficient of variations of the absolute value of the piezoelectric constant in a measurement area 400 cm2 is 0.5 or less.SELECTED DRAWING: None

A speaker protection system includes: a speaker having a driver and a passive radiator or vent; and a controller determining at least one of a displacement of the driver, a displacement of the passive radiator, and a velocity of airflow through the vent based on an input voltage representative of an audible sound, and determine an output voltage at which the speaker reproduces the audible sound based on a single type of compression applied to both the driver displacement and the passive radiator displacement or the vent airflow velocity. An output voltage provided to the speaker limits the driver displacement within a driver displacement range and simultaneously limits the passive radiator displacement within a passive radiator displacement range or the vent airflow velocity within an airflow velocity range to mechanically protect the speaker and reduce distortion of the reproduced audible sound.

Magnetic field cancelling audio systems and associated devices are disclosed. In one embodiment, an audio system with two electromagnetic audio drivers positioned and electrically connected to reduce emitted magnetic fields over a range of predefined frequencies.

The utility model discloses a unidirectional electret condenser microphone, which relates to the technical field of microphones and comprises a shell with one open end, a circuit board is arranged at the open end of the shell, a shell sound hole is arranged at the closed end of the shell, a vibrating diaphragm is arranged on the inner side of the closed end of the shell, an annular gasket is arranged on the vibrating diaphragm, and the annular gasket is arranged on the outer side of the shell. A polar plate is arranged on the gasket, a conductive piece is arranged between the polar plate and the circuit board, and a damper is adhered to the middle of the conductive piece. The unidirectional electret condenser microphone provided by the utility model solves the technical problems of complex structure, high production cost and the like of an electret microphone in the prior art, and has the advantages of simple structure, labor and material saving, high production efficiency, low production cost and strong market competitiveness.

The utility model belongs to loudspeaker technical field discloses a kind of electrostatic loudspeaker and electronic equipment, electrostatic loudspeaker includes shell, first polarity structure, second polarity structure, vibration structure. First polarity structure is equipped with at least one, first polarity structure is set in shell;Second polarity structure is equipped with at least one, second polarity structure is set in shell, and second polarity structure and first polarity structure are along first direction vibration structure alternately arranged;When one of the two of first polarity structure and second polarity structure includes electrode layer, the other of the two includes electret layer;First direction vibration structure is the thickness direction of shell;Vibration structure is set in shell, and vibration structure is conductor;The inner periphery of vibration structure is connected to second polarity structure, and the outer periphery of vibration structure is connected to shell. The electrostatic loudspeaker and electronic equipment provided by the utility model have long service life.

The embodiment of the invention relates to the technical field of semiconductor devices, and discloses an MEMS microphone, and the microphone comprises a substrate which is provided with a back cavity; a diaphragm disposed over the back cavity and attached to the substrate; the vibrating diaphragm comprises a main diaphragm and an additional material layer, wherein the yield strength of the additional material layer is greater than that of the main diaphragm; the additional material layer comprises a first main body part and N beam structures connected with the first main body part and the substrate; the main film comprises a main body sensing part and M conductive parts connected with the main body sensing part, and the values of N and M meet the condition that N is greater than M; at least part of the first main body part and the main body sensing part are fixedly arranged in a stacked mode, the single conductive part is stacked on the single beam structure, and the conductive part is used for enabling the main body sensing part to be electrically connected with an external circuit. According to the arrangement, the whole vibrating diaphragm can be firmer, so that a firmer and more stable MEMS microphone is formed.

The utility model relates to an electret microphone with low cost. The electret microphone comprises a shell, a gasket, a vibrating diaphragm, a copper ring and a circuit board, both the shell and the vibrating diaphragm comprise conductive materials, the gasket is an insulating material, the gasket is arranged between the shell and the vibrating diaphragm, and the copper ring is electrically connected with the vibrating diaphragm and the circuit board respectively; the shell, the vibrating diaphragm and the gasket are used for forming a capacitor; the vibrating diaphragm is used for generating vibration under the action of sound and generating a changing electric signal; the copper ring is used for transmitting the changed electric signal to the circuit board; and the circuit board is used for amplifying the changed electric signal. According to the electret microphone of the utility model, the vibrating diaphragm is directly used to complete vibration and acoustic-electric conversion, the material of the back pole plate is saved, and the manufacturing cost of the electret microphone is reduced.

The utility model discloses a double-back-pole push-pull output electret capacitor microphone, which comprises a pole head, and is characterized in that the pole head comprises an upper back pole, a lower back pole and a vibrating diaphragm arranged between the upper back pole and the lower back pole; a first gap is formed between the upper back pole and the vibrating diaphragm, and a second gap is formed between the lower back pole and the vibrating diaphragm; a first electret film layer is arranged on the lower surface of the upper back electrode, and a second electret film layer is arranged on the upper surface of the lower back electrode; the upper surface and the lower surface of the vibrating diaphragm are respectively provided with a metal layer. The upper back pole is provided with a sound inlet hole, and the lower back pole is provided with a sound balance hole. According to the electret capacitor microphone, the sensitivity is higher, and the output signal is stronger.

The invention discloses a microphone, electronic equipment and a microphone pickup control method. The microphone comprises the components of a housing which is provided with a sound hole; the sound pickup structure is arranged in the shell, and the sound pickup structure and the sound hole are oppositely arranged; the signal output structure is connected with the pickup structure and is used for outputting a sound signal of the pickup structure; wherein the pickup structure comprises a first pickup structure and a second pickup structure; the first pickup structure and the second pickup structure comprise electrets made of different materials, or the first pickup structure and the second pickup structure comprise coils with different diameters or elasticity moduli.

The application relates to the technical field of microphones, in particular to a pre-stage amplification circuit, an electret microphone and a vehicle. The pre-stage amplification circuit comprises one end of a time division duplex filter used for connecting the electret microphone, and the other end of the time division duplex filter used for connecting the base of an emitter follower through a high-pass filter; the emitter of the emitter follower is used for connecting a post-stage processing unit through a magnetic bead filter; the time division duplex filter is used for performing first filtering and second filtering on original audio signals collected by the electret microphone to obtain first audio signals; the high-pass filter is used for performing third filtering on the first audio signals to obtain second audio signals; and the emitter follower sends the amplified second audio signals to the post-stage processing unit through the magnetic bead filter. The application adopts a common emitter follower to amplify signals, has low cost, can eliminate TDD interference, and has high performance.

A sensor output device includes: a sensor and an output circuit. The sensor includes a piezoelectric element and an output terminal. The piezoelectric element includes porous resin. The output circuit includes a thermistor that connects the output terminal of the sensor to ground.

Microelectromechanical (MEMS) microphones with diaphragm trench stiffeners and methods of manufacture are provided. The MEMS microphone includes a flexible plate and a rigid plate mechanically coupled to the flexible plate. The MEMS microphone includes a stop member secured to the rigid plate and extending perpendicularly relative to a surface of the rigid plate opposite a surface of the flexible plate. The stop member limits movement of the flexible plate. The rigid plate includes a reverse bend edge including a first lateral etch stop including a first corner radius and a second corner radius. The first corner radius is greater than 100 nanometers and the second corner radius is greater than 25 nanometers. Further, a lateral step width between the first corner radius and the second corner radius is less than about 4 microns.

This invention relates to an apparatus for differentially driving an electrostatic drive unit of a microelectromechanical sound-generating device implemented in a microelectromechanical system (MEMS). The drive unit has a movable element having a first electrode, which is electrostatically drivable by a second electrode and a third electrode of the drive unit.

[Problem] To provide an electrode layer-forming composition, a laminate, use thereof, and a manufacturing method thereof, which can be used in a substantially solvent-free process, is applicable to a variety of processes including an electrode printing process, can achieve a solvent-free electrode layer, has remarkably excellent adhesion to a dielectric layer, conformability, shape retention, is unlikely to cause problems such as peeling of the electrode layer or defects even when used in a transducer, and can form an electrode layer having viscoelastic properties sufficient for practical use. SOLUTION An electrode layer-forming curable organopolysiloxane composition, containing: a curable reactive organopolysiloxane; and (E) conductive fine particles, wherein the sum of the amount of organic solvent in the entire composition is less than 0.1 mass%, as well as a use thereof.