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7580533 |
Particulate flow detection microphone
Gas containing particles or droplets flowing continuously through a microphone is perturbed by sound waves. Sound-induced localized pressure changes in the gas are measured by detecting variations...
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7493049 |
Audio Optic Cable
An invention is disclosed whereby an analog audio signal are transmitted over distances through a flexible medium using electro-optical radiation as the carrier of the audio signal. The analog...
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7391976 |
Optical acoustoelectric transducer
An optical acoustoelectric transducer having a directivity pattern like a better 8 by receiving by a light-receiving element a reflected fraction of the light from a light-emitting device...
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7359523 |
Fluidic acoustic transducer
Sound signals are detected. Light signals are generated that pass through a membrane of a bubble within a trench. The sound signals cause deformations within the membrane of the bubble. The light...
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7072475 |
Optically coupled headset and microphone
Apparatus and methods for transferring audio between a headset and electronic equipment over an optical link. The apparatus includes an electro-optical interface for electrically connecting to the...
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6990209 |
High directivity microphone array
A microphone array for providing a focused field of optimum audio reception is disclosed. The array has a series of interconnected microphones spaced within a housing. At a midpoint of the spaced...
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6865335 |
Optical microphone for communication and other devices
A lightwaveguide panel to be used with a a mobile telephone (MT) or personal digital assistant (PDA), the pannel comprises a first portion for lighting an LCD and/or a keyboard, and a second...
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6694031 |
Optical microphone/sensors
The invention provides a head for an optical microphone/sensor, including first and second light guides; the first light guide being coupled at an input end to a source of light and having an...
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6690804 |
Lighted microphone cable indicator
A lighting apparatus for use with a microphone and a sound mixing system wherein each microphone has an associated channel located in the sound mixing system. Each microphone has a lighting means...
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6549631 |
Pressure transducing assembly
A pressure tranducing assembly for converting received pressure into a digital pressure signal. A pressure transmitter adapted to receive a first mechanical pressure from an environment and to...
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6522761 |
Directionally sensitive pointing microphone
A microphone apparatus which includes a directional microphone having an axis of sensitivity along which the directional microphone is sensitive to sound. A light source is mechanically coupled to...
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6498853 |
Echo-cancelling optical microphone
The invention provides an echo-cancelling system for an optical microphone, for eliminating acoustical echoes from a source of acoustical signals to which the microphone is connected, the system...
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6493451 |
Communication helmet
A communication helmet having an enhanced noise reduction effect. The communication helmet incorporates a microphone disposed in the vicinity of the mouth of the speaker wearing the helmet. The...
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6459798 |
Sound-collecting device
A device for collecting sounds from objects comprises a plurality of microphones whose directivity can be varied depending on the environment in which each object is located. An optical microphone...
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6154551 |
Microphone having linear optical transducers
Microphone having linear optical transducers. The present invention includes the use of linear optical transducers in several configurations to detect the motion of one or more conventional...
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6081604 |
Electric sound converter
A head-phone having a case member storing therein a headphone unit, wherein a coating film containing a light discolor pigment to be discolored by irradiation of sun light is provided on the whole...
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6055080 |
Optical microphone
In an optical microphone including a light source, a fiber optic cable and a Fabry-Perot interferometer with two reflectors, wherein one end face of the fiber optic cable forms a first reflector...
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6014239 |
Optical microphone
An optical microphone includes a laser and beam splitter cooperating therewith for splitting a laser beam into a reference beam and a signal beam. A reflecting sensor receives the signal beam and...
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5995260 |
Sound transducer and method having light detector for detecting displacement of transducer diaphragm
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,...
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5818949 |
Microphone with infared on/off switch
A microphone including an infrared switch circuit is disclosed. The infrared switch circuit includes an infrared detector for detecting a reflection of an infrared signal off an object such as a...
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5815298 |
System and method for wirelessly communicating a sound signal
A system for communicating a signal representing the amplitude of a sound signal received at a remotely located transceiver via an optical airlink communication network, the system having an...
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5757530 |
Signal transmitter with automatic output control and systems utilizing the same
Described are apparatus for transmitting light wave signals, the apparatus being capable of adjusting their signal strength to automatically adapt to changes in the ambient light conditions of...
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5621806 |
Apparatus and methods for determining the relative displacement of an object
A microphone is disclosed which converts an audio signal directly into a digital representation by analyzing and digitizing the distortion imposed upon a signal, such as a string of regularly...
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5495357 |
Apparatus and method for recording, transmitting, receiving and playing sounds
A compact solid state representative communication device allows the user to record, transmit, receive, play and erase messages or sounds. The communication device includes a record switch for...
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5333205 |
Microphone assembly
A microphone assembly (134) includes a movable diaphragm (124) and a linear light gradient (130) which causes the movement of diaphragm (124) to be translated into a corresponding amplitude of...
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5323257 |
Microphone and microphone system
An infrared-ray cordless microphone including a modulator for modulating an acoustic-to-electric converted sound signal through a predetermined process; and an infrared-ray transmitter for...
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5262884 |
Optical microphone with vibrating optical element
An optical microphone includes a vibrating membrane defining a diaphragm for receiving acoustic signals. An optical element such as a lens is attached for vibrating with the membrane in direct...
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4991150 |
Electroluminescent optical fiber shock sensor
A piezoelectric or ferroelectric stress sensing material in intimate electrical communication with an electroluminescent material produces light at an amplitude dependent on the stress applied to...
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4979820 |
Apparatus for the remote detection of sounds caused by leaks
Two laser beams derived from a laser pass through a furnace and are superposed in a laser spot to produce interference fringes having the same pitch as that of a Ronchi grating printed on a...
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4947437 |
Stereo microphone
A stereo microphone that delivers "Right" and "Left" output signals from the sound field at a single point in space. A small, light, ball-like sound-sensing element is loosely suspended so that it...
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4789213 |
Electro-optical modulator having a monomode light waveguide modulator
An electro-optical modulator has a monomode light waveguide modulator for which a pressure-sensitive signal generator is provided as a signal source for the purpose of modulating a light power...
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4566135 |
Pressure transducer
A pressure transducer as a microphone comprises a base body with a flat polished surface and a diaphragm contacting the flat surface at a plurality of spaced points. The base body consists of a...
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4479265 |
Laser microphone
The invention is a laser microphone in which two aligned beams of laser light, of which one beam is slightly delayed in relation to the other beam of the same frequency and is reflected by an...
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4422182 |
Digital microphone
A digital microphone for directly supplying a digital signal which designates the displacement of a diaphragm is disclosed. A cylindrical reflecting mirror is provided integrally with the diaphragm...
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4284858 |
Dichroic transducer
A dichroic transducer is disclosed including a light source, a film containing a dichroic material in the path of the light beam and an acoustic information-containing wave, and a detector in the...
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4238856 |
Fiber-optic acoustic sensor
An optical fiber acoustical sensor for detecting sound waves in a fluid mum. An optical fiber coil through which a light beam is transmitted is placed in a fluid medium. A sound wave propagating...
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4224482 |
Mobile microphone-transmitter assembly
A mobile microphone-transmitter assembly is disclosed which comprises a microphone, a plurality of infrared light emitting devices, electrical apparatus connected between the microphone and the...
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4187404 |
Telephone set for optical fibers lines
A telephone set for optical fibers lines having a coupler for directing a first part of the light received from the input optical fiber on a photo-cell and a second part of this light on a...
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4166932 |
Optical microphone with rectangular fiber optics
An acousto-optic transducer which may be employed in a telephone subscriber instrument is described in which movement of a diaphragm varies the degree of coupling between the ends of two...
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4016556 |
Optically encoded acoustic to digital transducer
A transducer converts an acoustic signal into a digital pulse code signal through optical encoding techniques. A pulsed light source emits a beam of light along a predetermined path. A digital...
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3622791 |
MICROPHONE CIRCUIT FOR DIRECT CONVERSION OF SOUND SIGNALS INTO PULSE MODULATED ELECTRIC SIGNALS
A microphone for converting sound vibrations into a train of electrical pulses and comprising a vibratory flexible diaphragm receiving the sound pressure of sound signals on one of its surfaces,...
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3470329 |
INTERFEROMETER MICROPHONE
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3286032 |
Digital microphone
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2835744 |
Microphone
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