H04R 3 - Circuits for transducers

Patents for H04R 3 - Circuits for transducers (18,190)
12/2004
12/01/2004	CN2660831Y High performance echo suppresser
12/01/2004	CN1552169A Passive and active escapement for sound resonance
12/01/2004	CN1552057A Method and circuit for creating a sub-harmonic of a periodic signal
12/01/2004	CN1551991A Potential fixing device and potential fixing method
12/01/2004	CN1551988A Sensor capacity sensing apparatus and sensor capacity sensing method
12/01/2004	CN1551678A Narrow opening electroacoustical transducing
11/2004
11/30/2004	US6826284 Method and apparatus for passive acoustic source localization for video camera steering applications
11/30/2004	CA2197661C Directional ear device with adaptive bandwidth and gain control
11/25/2004	WO2004103025A1 Loudspeaker system for virtual sound synthesis
11/25/2004	WO2004103016A1 Microphone speaker body forming type of bi-directional telephone apparatus
11/25/2004	WO2004103013A2 A method and system for self-compensating for microphone non-uniformities
11/25/2004	WO2004079901A3 Digital filter and listening device
11/25/2004	WO2004030407A3 Drive mechanism
11/25/2004	WO2003104924A3 Acoustical virtual reality engine and advanced techniques for enhancing delivered sound
11/25/2004	US20040234093 Sound output system
11/25/2004	US20040234084 Microphone circuits having adjustable directivity patterns for reducing loudspeaker feedback and methods of operating the same
11/25/2004	US20040234083 Acoustic signal-processing apparatus and method
11/25/2004	US20040234068 Volume control in a communication device interface unit
11/25/2004	CA2672670A1 A hearing aid
11/24/2004	EP1480494A2 Feedback suppression in sound signal processing using frequency translation
11/24/2004	EP1479263A1 Modular loudspeaker
11/24/2004	EP1416767B1 Device for monitoring and amplifying audio signals
11/24/2004	CN1550121A Method and apparatus for controlling bass reproduction of audio frequency signal in electroacoustic transducer
11/23/2004	US6823073 Directional microphone assembly
11/18/2004	WO2004100603A1 Array speaker system
11/18/2004	WO2004100602A2 Method and system for communication enhancement ina noisy environment
11/18/2004	WO2004100601A1 Detection device
11/18/2004	US20040230433 Microphone system
11/18/2004	US20040228496 Switching circuit built in IC for earphone and loudspeaker of portable information device
11/18/2004	US20040228455 Dynamic range compression modification of a digital telephone switch for individual hearing characteristics
11/18/2004	US20040226379 Method and device for checking the air noise of a motor vehicle
11/18/2004	US20040226378 Ultrasonic sensor
11/18/2004	DE10318683A1 Sound and/or image reproduction device e.g. for in-car entertainment system, using frequency separation box for freqecy separation in stereo channels
11/18/2004	DE10254404B4 Audiowiedergabesystem und Verfahren zum Wiedergeben eines Audiosignals The audio reproduction system and method for reproducing an audio signal
11/17/2004	EP1478208A1 A method and system for self-compensating for microphone non-uniformities
11/17/2004	EP1477043A2 Compact surround-sound system
11/17/2004	EP0847661B2 Acoustic device
11/17/2004	CN2657323Y Audio amplifier
11/17/2004	CN1547803A Audio processing device
11/11/2004	WO2004098237A1 Method and apparatus for substantially improving power supply rejection performance in a miniature microphone assembly
11/11/2004	WO2004098233A1 Microphone array having a second order directional pattern
11/11/2004	US20040225388 Fully digitized audio system
11/11/2004	US20040223623 Apparatus and method for detecting sound direction
11/11/2004	US20040223620 Loudspeaker system for virtual sound synthesis
11/11/2004	DE102004019585A1 Audiosystem Audio system
11/10/2004	EP1475997A2 Method and system for communication enhancement in a noisy environment
11/10/2004	EP1475992A2 Electroacoustical transducing
11/10/2004	EP1127476A4 Point source speaker system
11/10/2004	CN1545368A Device and method for processing speech
11/10/2004	CN1175709C System and method for dual sound pickup signal noise reduction using spectral substraction
11/09/2004	US6816598 Multiple driver, resonantly-coupled loudspeaker
11/09/2004	US6816009 Circuit and method for a transimpedance audio amplifier providing variable gain while maintaining load impedance
11/04/2004	WO2004095880A2 Sound and/or image reproduction unit, and use of a removable operator panel
11/04/2004	WO2004095878A2 Method and apparatus for sound transduction with minimal interference from background noise and minimal local acoustic radiation
11/04/2004	US20040220800 Microphone array method and system, and speech recognition method and system using the same
11/04/2004	US20040218700 Digital implementation of multi-channel demodulators
11/04/2004	US20040218514 Audio system
11/04/2004	US20040218035 Mixed-media telecommunication call set-up
11/04/2004	CA2522896A1 Method and apparatus for sound transduction with minimal interference from background noise and minimal local acoustic radiation
11/03/2004	EP1473967A2 Method for suppressing at least one acoustic noise signal and apparatus for carrying out the method
11/03/2004	EP1473966A1 Electret capacitor microphone
11/03/2004	EP1473965A2 Acoustic signal-processing apparatus and method
11/03/2004	EP1473964A2 Microphone array, method to process signals from this microphone array and speech recognition method and system using the same
11/03/2004	EP1472905A2 Multichannel echo canceller system using active audio matrix coefficients
11/03/2004	EP1238566B1 Method and device for improving communication in a vehicle
11/03/2004	CN1543708A Method and apparatus for providing an error characterization estimate of an impulse response derived using least squares
11/03/2004	CN1543181A A distributed mix processing method
11/03/2004	CN1542509A Audio signal processing circuit and a display device incorporating the same
11/03/2004	CN1174658C Fully digitalized sound system
11/02/2004	US6813528 Apparatus and method for outputting audio signal of laptop computer coupled with docking station
10/2004
10/28/2004	WO2004093487A2 Systems and methods for interference suppression with directional sensing patterns
10/28/2004	WO2003020006A8 Circuit and method for acoustic source directional pattern determination utilizing two microphones
10/28/2004	US20040213419 Noise reduction systems and methods for voice applications
10/28/2004	US20040213412 Stereo sounding method, stereo sounding system, and musical tone generation control system
10/28/2004	CA2521948A1 Systems and methods for interference suppression with directional sensing patterns
10/27/2004	EP1471771A2 Audio reproduction apparatus and video receiving apparatus
10/27/2004	EP1471765A2 Adaptive feedback canceller
10/27/2004	CN1541496A Method and appts. for minimizing latency in digital signal processing systems
10/27/2004	CN1541456A Multi-channel echo cancel method, multi-channel sound transfer method, stereo echo canceller, stereo sound transfer appts. and transfer function calculation appts.
10/27/2004	CN1173487C Echo suppressor and non-linear processor of echo canceller
10/26/2004	US6810125 Microphone emulation
10/26/2004	US6809572 Integrated circuit with automatic polarity detection and configuration
10/26/2004	CA2247278C Acoustic element and method for sound processing
10/21/2004	WO2004091254A2 Method and apparatus for reducing an interference noise signal fraction in a microphone signal
10/21/2004	WO2004080116A3 Speaker unit with active leak compensation
10/21/2004	WO1999012386A9 5-2-5 matrix encoder and decoder system
10/21/2004	US20040208327 Microphone bias circuit
10/21/2004	DE10313331A1 Verfahren zur Bestimmung einer Einfallsrichtung eines Signals einer akustischen Signalquelle und Vorrichtung zur Durchführung des Verfahrens A method for determining an incident direction of a signal of an acoustic signal source, and apparatus for carrying out the method
10/21/2004	DE10313330A1 Suppression of acoustic noise signal in hearing aid, by weighted combination of signals from microphones, normalization and selection of directional microphone signal having lowest interference signal content
10/21/2004	DE10312065A1 Verfahren und Vorrichtung zum Entmischen akustischer Signale Method and apparatus for de-mixing of acoustic signals
10/20/2004	EP1469624A2 Change of display style of an audio signal processing device due to the difference between new and old parameters
10/20/2004	EP1469490A1 An audio signal processing circuit and a display device incorporating the same
10/20/2004	EP1468550A2 Digital linking of multiple microphone systems
10/20/2004	CN2650438Y Independant self-playing background music ceiling loudspeaker system acoustics
10/20/2004	CN1538784A Audible signal processing device and its method
10/19/2004	US6807281 Loudspeaker and method of driving the same as well as audio signal transmitting/receiving apparatus
10/19/2004	US6807279 MFB speaker system with controllable speaker vibration characteristic
10/19/2004	US6806766 BTL amplifying system
10/19/2004	US6806623 Transmit and receive isolation for ultrasound scanning and methods of use
10/14/2004	US20040204933 Virtual microphone array

1 ... 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 ... 182