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Matches 1 - 50 out of 2,081

Document Document Title
WO/2020/240724A1
An optical fiber sensing system according to the present disclosure comprises: an optical fiber (10) that transmits an optical signal in which sound is superimposed; a conversion unit (21) that converts the optical signal into acoustic d...  
WO/2020/233882A1
An integrated optical transducer (1) for measuring displacement of a diaphragm (10) comprises the diaphragm (10), a lens element (23) and a substrate body (20) having a waveguide structure (21) and a coupling element (22). The diaphragm ...  
WO/2020/217160A1
A method for determining tree infestation includes placing (1700) an optical fiber (220) around a trunk of a tree; recording (1702) with a distributed acoustic sensor (DAS) box (201) a Rayleigh signal reflected from the tree, along the o...  
WO/2020/216784A1
A mobile communications device that does not have a physical opening on the screen for audio is operable to transmit a signal to which a photoacoustic effect can be employed by interaction with water vapor in an ear of a user so as to ge...  
WO/2020/214108A1
The invention relates to fiber optic MEMS microphone that features electrically deflectable MEMS membrane via conversion of optical energy propagating in the optical fiber to electrical energy with photodiode chip.  
WO/2020/209947A1
A mounting system which includes a pocket for receiving a digital recorder or a wireless transmitter and a connector for connecting to the body of a microphone device, such as a hand held microphone. The pocket is made of a polyurethane ...  
WO/2020/193962A1
An optical microphone assembly (2) comprises a micro-electromechanical system (MEMS) component (4), a semiconductor chip (6), and an outer housing including at least part of a non-MEMS supporting structure and defining an aperture (32). ...  
WO/2020/193288A1
The invention relates to a MEMS comprising a substrate having a cavity. The MEMS comprises a moveable layer assembly arranged in the cavity and having a first bar, a second bar and a third bar arranged between the first bar and second ba...  
WO/2020/168836A1
Disclosed is a nuclear magnetic resonance communication device, the nuclear magnetic resonance communication device being provided with a control room communication module and a scan room communication module, the scan room communication...  
WO/2020/116269A1
This curved shape retaining unit: is attached to a cable, which transmits a signal from a signal sending unit connected at one end of the cable to a signal receiving unit connected at another end, or is attached to the signal sending uni...  
WO/2020/107621A1
Disclosed by the present invention are a surface sound-emitting apparatus and an electronic device. The surface sound-emitting apparatus comprises an exciter, a vibrating part and a connection element; the connection element is a sheet-l...  
WO/2020/101712A1
An audio system includes a transducer assembly, an optical sensing pathway, a laser, a detector assembly, and a controller. The transducer assembly is coupled to a user's ear and produces an acoustic pressure wave based on an audio instr...  
WO/2020/064239A1
An integrated optical transducer (2) for detecting dynamic pressure changes comprises a micro - electro - mechanical system, MEMS, die (10) having a MEMS diaphragm (12) with a first side (13) exposed to the dynamic pressure changes and a...  
WO/2020/064431A1
An integrated optical transducer (1) for detecting dynamic pressure changes comprises a micro-electro-mechanical system, MEMS, die (10) having a MEMS diaphragm (11) with a first side (12) exposed to the dynamic pressure changes and a sec...  
WO/2020/045675A1
A thermoacoustic device comprising a loop-shaped waveguide, a heat exchanger, and a heat conduction member. The loop-shaped waveguide has a medium filled therein. The heat exchanger is provided inside the waveguide and has a low-temperat...  
WO/2020/045600A1
A thermoacoustic device comprising a loop-shaped waveguide and a heat exchanger. The loop-shaped waveguide has a medium filled therein. The heat exchanger is provided inside the waveguide and has a low-temperature section and a high-temp...  
WO/2020/041358A1
An improved loudspeaker that has a plurality of stacks of cards having electrostatic transducers, in which a low capacitance PCB stator is utilized within the cards. The stators have metal that is not energized and thus exhibit low capac...  
WO/2019/243068A1
The invention relates to an audio signal processing apparatus (10) for a thermoacoustic sound transducer (20), the audio signal processing apparatus being designed to receive an audio signal (11) and to generate a control signal (12) for...  
WO/2019/220103A1
An optical microphone assembly (38) comprises a rigid substrate (42); an interferometic arrangement, a light source (48), at least one photo detector (50) and an enclosure (74). The interferometric arrangement comprises a membrane (46) a...  
WO/2019/212713A1
An audio system for providing content to a user. The system includes a first and a second transducer assembly of a plurality of transducer assemblies, an acoustic sensor, and a controller. The first transducer assembly couples to a porti...  
WO/2019/207578A1
Systems and methods for the reduction of noise arising from the fluid mechanics of the aerodynamic interactions of the relative motion of solid elements with a fluid, generally air, by generating pressure fields at or close to the source...  
WO/2019/159401A1
In order to provide a thermal excitation-type sound wave generation device and a sound wave generation system with which sound wave generation efficiency is improved, this thermal excitation-type sound wave generation device (100) is pro...  
WO/2019/159400A1
In order to provide a small thermal excitation-type sound wave generation device in which the number of components is reduced, and a sound wave generation system, this thermal excitation-type sound wave generation device (100) is provide...  
WO/2019/069289A1
An electroacoustic transducer may include a cathode (12) having a plurality of discharge elements (18) assembled into one or more axisymmetric arrays (20) and an anode (14) having a plurality of discharge elements (18) assembled into one...  
WO/2019/014019A9
Methods and apparatus to communicate via a welding arc are disclosed. An example welding-type power supply includes a power converter, a weld monitor, and an arc modulator. The power converter outputs welding power to sustain a welding-t...  
WO/2019/017036A1
The present invention provides a sound output device which is mounted and used in the vicinity of an ear of a hearer and is capable of outputting wideband sounds. This sound output device is provided with: a first acoustic generation par...  
WO/2019/014019A1
Methods and apparatus to communicate via a welding arc are disclosed. An example welding-type power supply includes a power converter, a weld monitor, and an arc modulator. The power converter outputs welding power to sustain a welding-t...  
WO/2018/236140A1
The present invention relates to a hybrid speaker wherein a dynamic low-volume sound speaker and an electro-magnetic high-volume sound speaker are coaxially coupled to each other by a housing; the electro-magnetic high-volume sound speak...  
WO/2018/227272A1
A thermoacoustic transducer apparatus is disclosed including at least one thermal converter operable to provide power conversion between acoustic power and thermal power in a pressurized working gas contained within a working volume, a p...  
WO/2018/221264A1
[Problem] To provide an electroacoustic transducer capable of selecting acoustic characteristics desired by a user. [Solution] An electroacoustic transducer according to one embodiment of the present invention is provided with: a housing...  
WO/2018/199634A1
The present invention relates to a sound wave generating apparatus comprising: a sound wave output unit which outputs two or more sound waves having different frequencies; and a sound wave supply unit which generates sound waves that are...  
WO/2018/150371A1
A voice activation system for a vehicle. The voice activation system for a vehicle which has at least one sound panel capable of providing vibrations of a user's voice from the outside of the vehicle into an inside area of the vehicle. A...  
WO/2018/146951A1
Provided are a thermoacoustic device and acoustic inspection device having a heating element that has relatively high strength and also has a relatively large degree of freedom of design. A thermoacoustic device according to one aspect o...  
WO/2018/134568A1
There is provided a MEMS microphone as a microelectromechanical transducer comprising a flexible membrane, the flexible membrane comprising an electromagnetic waveguide. There is further provided a microelectromechanical system comprisin...  
WO/2018/117370A1
The present invention relates to a speaker. A speaker according to the present invention comprises: a pair of permanent magnets arranged on open opposite sides of a solenoid coil having a rectangular box shape; and a first setting case a...  
WO/2018/060705A1
A heterodyning arrangement is disclosed that comprises a conductive material element, for example in the form of a graphene material element, at least a first input terminal (12) whereby electrical signals related to a first input electr...  
WO/2018/050304A1
A speaker (10) comprises an enclosure (8) defining an internal volume (11); and at least one sound generator (7), the sound generator (7) comprising one or more surfaces defining an air-path conduit (15) through which air operably passes...  
WO/2018/041789A1
The invention relates to a method for the spatial tomography of sound comprising the steps: contactless acquisition of a physical parameter for a first and a second plurality of local regions in space along a first and a second laser bea...  
WO/2018/026267A1
The present invention is in the field of a three dimensional thermoacoustic device composed of nanoporous material and the method to fabricate such a device, as well specific uses of said device, which device may have an improved sound p...  
WO/2018/014431A1
An hybrid Bluetooth earphone comprises an ear case (1), a Bluetooth receiver (2) and a frequency divider (3). A first acoustic chamber (11) and a second acoustic chamber (12) which are independent from each other are arranged in the ear ...  
WO/2017/213415A1
The present invention provides a sound output apparatus comprising: a first sound output unit; a second sound output unit provided so as to be spaced at a predetermined distance from the first sound output unit; at least one opening form...  
WO/2017/199809A1
Provided is an ultrasonic measuring device wherein the position of an optical detection unit with respect to a vibrating film is not needed to be set with a high positional accuracy in plan view of a substrate. An ultrasonic transducer d...  
WO/2017/158586A1
Laser-based system and optical microphone having increased bandwidth. The system includes a laser microphone to transmit a laser beam towards a human speaker; to receive an optical feedback signal reflected back from the human speaker; a...  
WO/2017/146323A1
A hybrid type dynamic speaker is disclosed. According to the present invention, two or more nozzle holes are formed in a mounting portion of a frame provided with a full-range generating speaker, and each nozzle hole is equipped with bal...  
WO/2017/142842A1
Recording, manipulating, distributing and creating sound pressure waves in one or more media by employing an apparatus that transfers the energy between photons and particles of the media is disclosed. An exemplary apparatus comprises on...  
WO/2017/130021A1
This invention presents a multi-channel remote audio monitoring device based on a heterodyne interferometric laser Doppler vibrometer. Device transmits two invisible laser beams to a reflecting surface being vibrated by sound sources in ...  
WO/2017/115339A1
The present disclosure relates to the field of acoustics, sound reproduction technologies, and the design principle of the loudspeaker, and more particularly, to an electroacoustic transducer having controlled ion generation. The electro...  
WO/2017/116023A1
Disclosed is a noise shielding earset having an acoustic filter. The noise shielding earset having an acoustic filter according to the present invention comprises: a driver unit for generating sound; and an acoustic filter for covering a...  
WO/2017/111376A1
Provided in the present invention are a complex device and an electronic device comprising same, the complex device comprising: a frame provided with a specific space therein; a vibrating member, provided inside the frame, for generating...  
WO/2017/102172A1
Microphone systems and methods of determining absolute sensitivities of a MEMS microphone (100). The microphone system includes a speaker (155), the MEMS microphone (100), and a controller (205). The speaker (155) is configured to genera...  

Matches 1 - 50 out of 2,081