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WO/1999/021399A1 |
A wear ring assembly (22) for an air gun includes a support ring (128) having a receiving recess (130) of a first length formed in a surface of an end of the support ring (128). An elastic ring (124) is adjacent an end of the receiving r...
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WO/1999/003146A1 |
A vibratory transducer comprises a housing, a vibrating member (112) disposed within the housing (108), and an inertial mass (100) attached to a free end of the vibratory member (112). The other end of the vibratory member is anchored to...
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WO/1998/057522A1 |
A compilation of improvements and modifications to U.S. patent 5,392,358 which discloses an electrolytic loudspeaker assembly (10) which reproduces a broad band of audio signals. The assembly (10) is comprised of a thin, non-magnetic cap...
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WO/1998/051123A1 |
Transducer circuitry, and an associated method, converts acoustic signals into electrical signals. The transducer circuitry includes a diaphragm which is positioned to receive acoustic signals, such as voice signals. Displacement of the ...
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WO/1998/035529A2 |
A sonic actuator including a multi-layer membrane having an elastomeric dielectric polymer layer with a first surface and a second surface, a first compliant electrode layer contacting the first surface of the polymer layer, and a second...
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WO/1998/014033A1 |
The invention concerns methods and devices for automatic control of transducers with variable reluctance. It consists in determining (201) in non- linear manner independent of the mechanical load of the transducer the field required for ...
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WO/1998/006234A1 |
A projector (10) for creating electrohydraulic acoustic and pressure waves conprising an energy source (21) (such as a capacitor) within approximately one meter of an electrode array (23). Larger projectors may be formed by arraying the ...
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WO/1998/002977A1 |
The present invention is the emission of new sonic or subsonic compression waves from a region of interference of at least two ultrasonic wave trains (30, 32). In one embodiment, two ultrasonic emitters (20) are oriented so as to cause i...
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WO/1998/002978A1 |
The present invention is the emission of new sonic or subsonic compression waves from a resonant cavity (80) as a result of interference of at least two ultrasonic wave trains (30, 32). In one embodiment, two ultrasonic emitters (20) are...
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WO/1997/043870A1 |
A system and method for registration and reproduction of sensory fields is provided whereby single or multiple sounds or images can be created or registered. The system and method utilize combinations of self-demodulation, scattering and...
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WO/1997/040643A1 |
An opto-acoustic detector (10) includes a fiber laser (17) having a cavity which includes an optical fiber (11) having an active medium portion (13) doped with a gain material so that the detector may be used in high frequency, high dens...
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WO/1997/028129A1 |
Compounds of formula (I), wherein G1 is CH or N; G2 is CH or N; R1 is a variety of optional substituents; L1 is (1-4C)alkylene; T1 is CH or N; R2 and R3 are independently hydrogen or (1-4C)alkyl or are joined to form a ring; X1 and X2 re...
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WO/1997/021321A1 |
A photothermal apparatus is provided for controllably heating and cooling a gas in order to alter and thereby control the acoustic, mechanical or optical properties of the gas. For acoustic applications, the photothermal device may be us...
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WO/1997/020233A1 |
An acoustic generating system is described incorporating a bubble generator (1) for forming pressurised gas bubbles and directing the bubbles in a plume from an outlet (7), and a low frequency sound source (2) to apply a varying pressure...
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WO/1996/036983A1 |
An apparatus and method are provided for determining the position of a reflective target surface (60) using one or more laser cavities (40, 41). A transmitting laser cavity (40) produces a stable-resonator output beam (42) which is modul...
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WO/1996/035313A1 |
The invention relates to an arrangement for generating sound waves or anti-sound waves. For the sound wave transducer, use can be made of window glass (1) or other types of transparent material, which is set into vibration by means of on...
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WO/1996/028001A1 |
A passive acousto-optic modulator for the modulation of a light beam as a function of a variation in air pressure comprising a beam splitter arranged relative to the beam so as to produce a signal beam and reference beam, the beam splitt...
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WO/1996/000488A1 |
Use of a fluid flow measuring device as a microphone for detecting acoustic waves, said fluid flow measuring device comprising at least one heating element (H), at least a first temperature sensor (S1) arranged at a first predetermined s...
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WO/1995/033355A1 |
A sound feeling device (1) having a case main body (4) which is constituted of, at least, a case (3) having a bottom (3x) in contact with the body when the device (1) is used and a partition plate (5) which is mounted with a loudspeaker ...
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WO/1995/031083A1 |
An acoustic sensor for use in a typical atmospheric condition, which contains both winds and turbulence, such as a wind and turbulence encountered on the exterior surface of a moving airborne flight vehicle includes a probe housing (10) ...
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WO/1995/014363A1 |
An electromagnetic acoustic transducer (1) for generating ultrasound waves in an electrically conducting sample (2) comprises magnetic means (7) for producing a static magnetic field, and a coil (5) through which brief current pulses are...
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WO/1994/019914A1 |
Apparatus (21) is described for reproducing low frequency sound in response to an applied electrical signal having a rotary acoustic radiator (22) comprised of a chamber (26) having a rotor assembly (58) including a shaft (61) and movabl...
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WO/1994/001979A1 |
A hydraulic powered low-damped loudspeaker including a hydraulic cylinder (21) attached to the cone (22) of a speaker which can be used in a bandpass loudspeaker.
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WO/1993/024813A1 |
There is described an optical acoustic sensor (110) that is pressure-compensated for operation in high-pressure environments such as the deep sea and that may be employed in multi-sensor arrays. The sensor (110) includes an acoustically ...
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WO/1993/023178A1 |
A low frequency sonar projector (100) for use with a projector array having at least one ceramic stack (102) comprised of lead magnesium niobate-lead titanate (PMN-PT) having a Curie temperature Tm approximately equal to the operating te...
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WO/1993/018628A1 |
Transducer comprising a wall (1) delimiting a cavity (3), an output channel (5) crossing the wall (1) and opening into the cavity (3), a light-transmitting member (6) extending through the wall and opening into the cavity (3), the output...
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WO/1993/014609A1 |
The sensor is comprised of a casing (1) supporting a light input member (9) and a light output member (14) arranged facing each other and defining a light beam (12), and a membrane (6) arranged adjacent to the light beam (12) and present...
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WO/1992/005458A1 |
A method of making modular micro-optical systems of great flexibility and adaptability. A substrate (22) is formed with a relief pattern (23), optical components such as optical fibers (24) are added, another relief pattern (25) is forme...
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WO/1990/015513A1 |
A multi-driver, coaxially mounted loudspeaker array (10) utilizing a high frequency bi-morph driving element (36) that is totally contained within the voice coil (18) former (16) (air core) of a lower frequency loudspeaker. The outwardly...
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WO/1990/012296A1 |
A semiconductor transducer (30, 80) or actuator (101) is disclosed. The transducer and actuator each include a defecting member (38, 83, 108) with corrugations (34, 88, 110) producing increased vertical travel which is a linear function ...
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WO/1990/007250A1 |
The microphone, by means of which acoustic signals whose spectrum is above 20Hz, may be measured, comprises a reference space exempt from this signal. It further comprises a monomode light source (10) and an optical interferometer with a...
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WO/1989/012375A1 |
An optical microphone is described that is composed of the body of the microphone proper, of a proof laser (7), of a thin film (1), and of a detector (11) sensitive to position. The pressure waves due for instance to the absorption by a ...
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WO/1989/006512A1 |
An optical reflection hydrophonic probe is useful for determining the pressure-time behaviour of pressure waves in fluids. One end of an optical waveguide (glass fibre) dips into the fluid. The reflection of light at the tip of the glass...
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WO/1989/000295A1 |
Sensor systems and methods for detecting the position and/or movement of an object (20) in multiple degrees of freedom. The sensor system of the present invention comprises at least one field-effect transistor (FET) (110), the geometrica...
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WO/1988/007785A1 |
Electrokinetic transducing method and system are disclosed in which the two electrode arrays (14, 16) confront each other and each electrode in one array (14) is equidistant from the two nearest electrodes in the other array (16). The el...
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WO/1988/004126A1 |
A thin diaphragm (22) receives pressure across one side and faces a beam splitter (25) on the other side. The beam splitter (25) is integrally attached to the diaphragm (22) and serves as a local optical reference plane for the entire as...
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WO/1985/000495A1 |
An electroacoustic transducer, primarily in the form of a capacitive microphone, for incorporation into a semiconductor substrate (10). The vibrating element comprises a largely non-tensioned diaphragm (14), such as an epitaxial layer (1...
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WO/1981/003100A1 |
A high-fidelity type loudspeaker decreases distortion and increases conversion efficiency by decreasing mass by employing a gas driver. A gas-tight enclosure (12) contains a polar gas (whose molecules are capable of exhibiting a dipole m...
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JP2024013984A |
An object of the present invention is to provide an electroacoustic transducer that can realize nonlinear acoustic output at the lowest possible sound pressure. An electroacoustic transducer (1) includes a heating element (3) that is a t...
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JP7415425B2 |
To provide a stacked thin film having both excellent piezoelectric properties and excellent magnetostrictive properties and an electronic device with high conversion efficiency.A stacked thin film 2 having a piezoelectric thin film 10 co...
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JP2023554646A |
An audio system including an optical microphone and an audio controller. Optical microphones include a light source and a detector. In some embodiments, the light source illuminates the user's skin. Alternatively, the optical microphone ...
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JP2023552858A |
The optical displacement sensor (2) comprises a reflective surface (4) and, together with the reflective surface, one or more diffraction gratings (6) each defining an interference arrangement. The reflective surface (4) is movable relat...
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JP7387645B2 |
An optical microphone assembly comprises a rigid substrate; an interferometric arrangement, a light source, at least one photo detector and an enclosure. The interferometric arrangement comprises a membrane and at least one optical eleme...
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JP7387105B2 |
To increase the magnetic field force of a small magnet without increasing the thickness (height) of a magnet arrangement configuration, and to reduce the size of an electromagnetic ultrasonic probe.An electromagnetic ultrasonic probe 1 i...
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JP3244347U |
[Problem] A coaxial plate that improves the integrity of the sound quality, increases the depth of the sound, improves the effect of the entire sound range of headphones, and achieves sound quality that reaches the Hires standard of Sony...
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JP7363915B2 |
An acoustic sensor that uses an optical fiber and has a high directivity is provided. An acoustic sensor includes a sensing part and an interrogator. The sensing part has a sensing element composed of an optical fiber. The interrogator i...
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JP3244057U |
[Problem] To provide TWS noise canceling earphones with multiple speakers. [Solution] A plate speaker 4 responsible for mid-high frequency vibrations and a moving coil speaker 5 responsible for mid-low frequency vibrations are installed ...
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JP2023540983A |
One embodiment of this application provides a laser microphone that includes a diaphragm, a laser device, a control circuit, a self-mixing signal acquisition device, and a signal processing circuit. The laser device is configured to emit...
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JP2023539966A |
A sensor device according to an embodiment of the present application includes an elastic component, a sensor cavity in which a first side wall of the sensor cavity is formed of the elastic component, and an energy conversion component t...
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JP7347514B2 |
A pressure wave generating element is provided that includes a support and a heat generating layer that is provided on the support and generates heat by energization. Moreover, the heat generating layer includes a fiber with at least a p...
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