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WO/2024/074368A1 |
An optical path length sensor for sensing a physical quantity of an external source comprises a plurality of lasers, each comprising an optical resonator and a gain medium (31) to produce a laser beam (32a, 32b) in the optical resonator....
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WO/2024/066065A1 |
Disclosed in the present application is an MEMS optical microphone. The MEMS optical microphone comprises: a shell, which has an inner cavity and a sound inlet, which allows the inner cavity to be in communication with the outside; a mic...
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WO/2024/070162A1 |
A thermoacoustic generation device (1) amplifies a sound wave generated in a working fluid (F0) flowing through a fluid piping (11) by a low temperature-side heat exchanger (23), a high temperature-side heat exchanger (22), and a heat ac...
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WO/2024/066027A1 |
A MEMS optical microphone, comprising: a housing (10), which has an inner cavity (15) and a sound inlet (11) that places the inner cavity (15) in communication with the outside; a diaphragm (20), which is suspended inside of the inner ca...
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WO/2024/066102A1 |
Disclosed in the present invention is an MEMS optical microphone, comprising: a housing, which is provided with an inner cavity and a sound inlet for making the inner cavity be in communication with the outside; a micro-electro-mechanica...
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WO/2024/057603A1 |
Provided is a thermal-excitation-type pressure-wave-generating element with which it is possible to generate higher sound pressure. A pressure-wave-generating element according to the present invention is a thermal-excitation-type elemen...
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WO/2023/232628A1 |
An acoustic transducer device includes a substrate (102); and a cap (104), arranged on the substrate (102), and defining an acoustic chamber as a volume between the substrate (102) and the cap (102); the acoustic chamber comprising a sup...
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WO/2023/227361A1 |
The invention relates to a microphone, comprising: - an emitter (1), which is designed for emitting electromagnetic laser radiation (20), - a detector (2), which is designed for determining an intensity (I) of the electromagnetic laser r...
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WO/2023/208734A1 |
An electroacoustic transducer (10) comprises a surface-emitting semiconductor laser (150, 1501,...1504) with a vertical resonator (125), an active area (133) for emitting electromagnetic radiation, a first and a second resonator mirror (...
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WO/2023/202929A1 |
A self-mixing interferometry opto-acoustic transducer (1) comprises a laser (2) configured to perform two-sided emission through a first emission surface (2a) and a second emission surface (2b), and to undergo self-mixing interference in...
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WO/2023/203996A1 |
This microphone 100 comprises: a vibrating body 10; a magnet 20 capable of vibrating due to a sound wave in conjunction with the vibrating body; a magnetic sensor 30 for outputting a change of magnetic force due to the vibration of the m...
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WO/2023/203654A1 |
A microphone 100 comprises: an oscillator 10; a magnet 20 that directly or indirectly contacts the oscillator and that can oscillate by sound waves; and a magnetic sensor 30 that is provided at a position spaced apart from the outside of...
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WO/2023/195209A1 |
This heat-sound converter (1) is designed to convert heat to sound waves using a thermoacoustic phenomenon. The heat-sound converter (1) comprises a heater (2), a cooler (3), and a heat accumulator (4). Heat transfer parts (24), (34) for...
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WO/2023/192025A1 |
An acoustic metamaterial (AMM) passive impedance matching technique to enhance the acoustic performance of porous/ poro-elastic sound absorbing materials is disclosed. An AMM passive matching device is implemented by achieving negative r...
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WO/2023/181608A1 |
This heat-sound converter (1) is designed to convert heat to sound waves using a thermoacoustic phenomenon. The heat-sound converter (1) comprises: a heater (2) having a first sound wave passage (21) through which a sound wave passes, an...
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WO/2023/183302A1 |
A system for locating a sound source includes at least four emitter/receiver pairs, each emitter/receiver pair of the at least four emitter/receiver pairs including a laser emitter and a receiver external to an enclosed structure. The la...
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WO/2023/104370A1 |
An optoelectronic device for a self-mixing interferometer, comprises a driver block, a semiconductor laser (SCL), a detector (DTC) and a switching network (SWN). The driver block is operable to provide a time modulated control signal, wh...
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WO/2023/071960A1 |
Provided in the present application is a sound collection method for a microphone. A microphone comprises a laser self-mixing apparatus and a vibrating diaphragm apparatus, wherein the vibrating diaphragm apparatus comprises a diaphragm,...
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WO/2023/053590A1 |
Provided is an ultrasonic wave-generating device that has high conversion efficiency. The ultrasonic wave-generating device comprises: a coil 2 that includes a first main surface 2a and a second main surface 2b which are on opposite fr...
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WO/2023/049051A1 |
An audio system for spatializing virtual sound sources is described. A microphone array of the audio system is configured to monitor sound in a local area. A controller of the audio system identifies sound sources within the local area u...
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WO/2023/283243A1 |
Micro-wire sensors comprise a conductive sensing element situated above a substrate. The sensing element can be fixed to the substrate at one or more ends and can be formed by patterning a conductive layer deposited on a flexible or othe...
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WO/2022/262226A1 |
One or more of the embodiments of the present specification relate to a vibration sensor. The vibration sensor comprises: a vibration assembly, the vibration assembly comprising a mass element and an elastic element, and the mass element...
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WO/2022/253806A1 |
The hybrid sound radiation device according to the invention is used for vibrating a heavy-weight rigid plate at audio frequencies. The device comprises two voice coils arranged concentrically, the external voice coil being coupled to a ...
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WO/2022/248768A1 |
An arrangement for producing sound in an electronic device comprises a magnetic vibrator (101) comprising a first part (203) and a second part (204) provided with permanent magnets, and at least one induction coil (205). The arrangement ...
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WO/2022/212607A1 |
A displacement detector comprises a substrate (SUB), a membrane (MEM) having an inner surface (INS) facing the substrate. A mounting area (MAR) is arranged to fix the membrane along at least part of the perimeter (PER) of the membrane, w...
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WO/2022/212608A1 |
A displacement detector comprises a substrate (SUB) and a membrane (MEM) having an inner surface (INS) facing the substrate. A mounting area (MA) is arranged to fix the membrane along at least part of the perimeter (PER) of the membrane,...
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WO/2022/185593A1 |
This sound wave generation device (10) comprises a drive circuit (12) and a power auxiliary circuit (13). The drive circuit (12) has: a capacitor (C1) charged by a DC power source (V1); and a drive switching element (T1) that supplies po...
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WO/2022/176637A1 |
This pressure wave generating element comprises a support body 10 and a fiber layer 20 that is provided upon the support body 10 and that generates heat from the application of electric current. The fiber layer 20 includes fibers fb havi...
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WO/2022/176651A1 |
This pressure wave generating element comprises a support body 10 and a fiber layer 20 that is provided upon the support body 10 and that generates heat from the application of electric current. The fiber layer 20 includes fibers having ...
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WO/2022/163309A1 |
A sound meter (100) comprises: a light source (111) that emits laser light; a frame unit (120) that surrounds a predetermined space, through which sound passes, so as to intersect a travelling direction of the sound, the frame unit (120)...
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WO/2022/156888A1 |
The present disclosure relates to an optical microphone. The optical microphone comprises a light source, a light guide, an incoupling element, an outcoupling element, a microphone diaphragm, and a photodetector. The incoupling element c...
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WO/2022/152789A1 |
The invention relates to a device (110) for reproducing (112) an acoustic signal (114), comprising: • a laser element (132) for emitting (134) an optical signal (136) to a target medium (138) in such a way that transmission (140) of th...
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WO/2022/142737A1 |
A vibration sensor (200). The vibration sensor comprises: a vibration receiver (210) comprising a housing (211) and a vibration unit (212), wherein the housing (211) defines an acoustic cavity, and the vibration unit (212) is located in ...
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WO/2022/141112A1 |
Provided are a bone conduction sound-production device, and a sound-production processing method, apparatus, medium, and program product. The bone conduction sound-production device comprises a holding component and a replaceable bone co...
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WO/2022/143302A1 |
A vibration sensor (200), comprising: a vibration receiver (210) and an acoustic transducer (220). The vibration receiver (210) comprises a housing (211), a limiting member (212) and a vibration unit (213), wherein the housing (211) and ...
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WO/2022/133086A1 |
An audio system including an optical microphone and an audio controller. The optical microphone includes a light source and a detector. In some embodiments, the light source illuminates skin of a user. Alternatively the optical microphon...
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WO/2022/110416A1 |
Provided in the present application is a piezoelectric MEMS microphone, comprising at least one piezoelectric MEMS unit, the piezoelectric MEMS unit comprising a substrate, the substrate comprising an annular peripheral wall enclosing an...
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WO/2022/084443A1 |
An acoustic sensor (100, 200, 300, 400, 500) is disclosed, the sensor comprising a laser (105, 205, 305, 405, 505) and a membrane (140, 240, 340, 440, 540) configured to vibrate in the presence of an acoustic wave, and to reflect radiati...
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WO/2022/065432A1 |
The purpose of the present invention is to provide, inter alia, a communication device that recognizes phonemes spoken by a subject. The communication device comprises: a vibration transmission unit for transmitting input vibration waves...
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WO/2022/048588A1 |
Provided is a laser microphone, comprising a vibrating diaphragm, a laser device, a control circuit, a self-mixing signal acquisition apparatus and a signal processing circuit, wherein the laser device is used for emitting light to the v...
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WO/2022/039596A1 |
A micro-electro mechanical systems, MEMS, -based microphone (1) for detecting sound signals. The MEMS-based microphone (1) comprises a body (2), a resonator (3) and a cavity provided in the body (2), the resonator (3) covering at least a...
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WO/2022/034340A1 |
There is provided a loudspeaker apparatus (200) comprising: a first unit (300) arranged to propagate sound in a first frequency range; and a second unit (400) arranged to propagate sound in a second frequency range that is higher than th...
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WO/2022/009659A1 |
This optical microphone comprises: a housing; a diaphragm disposed in the housing; a first light source disposed inside the housing; a first light-receiving element disposed inside the housing; a sensing unit that senses the output of th...
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WO/2022/007002A1 |
The present utility model provides a piezoelectric MEMS microphone, comprising a base having a back cavity and a piezoelectric vibrating diaphragm. The piezoelectric vibrating diaphragm comprises an anchoring part fixedly supported by th...
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WO/2021/223813A1 |
The invention relates to a method for producing a target break line (3) with a defined tear resistance in an airbag cover (2). The target break line (3) is produced using a removal method, in which sound waves are generated along a line ...
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WO/2021/219994A1 |
An optical microphone module (2) for installation in a microphone assembly is described. The module (2) is manufactured by assembling a semiconductor chip (4), a spacer (6) and an interferometric component (8) in a stack with the spacer ...
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WO/2021/213577A1 |
The invention relates to a method for activating a gas, wherein an electrically conductive aeromaterial having a pore space comprising the gas is electrically contacted and at least one electric current, which varies over time, flows thr...
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WO/2021/191714A1 |
A fiber optic distributed acoustic sensing (DAS) system (500) for detecting a red palm weevil (RPW) includes an optical fiber (100) configured to be wrapped around a tree and a DAS box (502) connected to the optical fiber (100). The DAS ...
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WO/2021/191086A1 |
An apparatus (34) for sound detection, sound localization and beam forming comprises a display (1) and a plurality of microphone stacks (3), wherein the display (1) surrounds each microphone stack (3) in lateral directions (x, y). The ap...
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WO/2021/172287A1 |
An optical microphone comprising: a light source (110); a first optical branching unit (120) for splitting light emitted from the light source into reference light and measurement light; a second optical branching unit (130) for splittin...
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