Patents
Sitemap › H04 - Electric communication technique › H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; Deaf-aid sets; Public address systems › H04R 3 - Circuits for transducers
Patents for H04R 3 - Circuits for transducers (18,190)
06/2003
06/24/2003US6584202 Method and device for reproducing a stereophonic audiosignal
06/24/2003US6583658 Balanced circuit arrangement
06/19/2003WO2003050942A1 Communication device with active equalization and method therefor
06/19/2003US20030114116 Rear entertainment system
06/19/2003US20030112983 Real-time audio source separation by delay and attenuation compensation in the time domain
06/19/2003US20030112982 Apparatus and method for controlling audio noise attenuation by monitoring buffer
06/19/2003US20030112088 Compander architecture and methods
06/18/2003EP1319322A1 Method for controlling a transmission system, use of this method, transmission system, receiving unit and hearing aid
06/18/2003EP1319321A2 Loudspeaker driver
06/18/2003EP1319224A2 Dynamic power sharing in a multi-channel sound system
06/18/2003EP1042866A4 Method and system for driving speakers with a 90 degree phase shift
06/17/2003US6580799 Keyboard comprising a loudspeaker
06/17/2003US6580797 Amplifier circuit for electret microphone with enhanced performance
06/17/2003US6580794 Acoustic echo canceler with a peak impulse response detector
06/12/2003US20030108213 Loudspeaker device
06/12/2003US20030108209 Communication device with active equalization and method therefor
06/12/2003US20030108208 Method and device for comparing signals to control transducers and transducer control system
06/12/2003US20030108207 Phase conversion surround circuitry
06/12/2003US20030107478 Architectural sound enhancement system
06/11/2003EP1318504A2 Architectural sound enhancement system
06/11/2003EP1317871A2 Improved directional microphone system
06/11/2003EP1317869A1 A system of sound transducers with controllable directional properties
06/10/2003US6577738 Parametric virtual speaker and surround-sound system
06/06/2003CA2412800A1 Architectural sound enhancement system
06/05/2003WO2003047309A1 A high efficiency driver for miniature loudspeakers
06/05/2003WO2003047308A1 A divider of a high fidelity and undistorted baffle box
06/05/2003WO2003046913A1 Multi-media apparatus
06/05/2003WO2003010995A3 Sound reinforcement system having an multi microphone echo suppressor as post processor
06/05/2003WO2002054719A3 Method and apparatus for active reduction of speakerphone echo
06/05/2003US20030105540 Echo attenuating method and device
06/05/2003US20030103641 Device for sound conversion
06/05/2003US20030103634 Vehicle audio system and reproduction method using same
06/05/2003DE20301882U1 Automatic microphone switch with distance sensor uses LED's activated by IR when singer is standing close to microphone and switch is left permanently ON in bright sunlight
06/04/2003EP0704118B1 Signal amplifier system with improved echo cancellation
06/04/2003CN1110891C 数字功率放大器 Digital Power Amplifier
06/03/2003US6574346 Bass reproduction speaker apparatus
06/03/2003US6574339 Three-dimensional sound reproducing apparatus for multiple listeners and method thereof
06/03/2003US6574336 Echo suppressor and non-linear processor of echo canceller
06/03/2003US6573786 Electronic devices comprising an audio amplifier and methods for controlling such electronic devices
06/03/2003CA2249283C Acoustic feedback correction
05/2003
05/30/2003WO2003044774A1 Audio-based method and apparatus for controlling operation of an appliance
05/30/2003WO2003010996A3 Sound reinforcement system having an echo suppressor and loudspeaker beamformer
05/29/2003US20030099349 Echo canceller in a communication system at a terminal
05/29/2003US20030098364 Apparatus for controllably focusing ultrasonic acoustical energy within a liquid stream
05/28/2003CN1420710A Composite receiver and loudspeaker
05/28/2003CN1420624A Crackle suppressing circuit and sound output amplifier
05/27/2003US6570818 Electroacoustic transducer
05/22/2003WO2003043374A1 Computation of multi-sensor time delays
05/22/2003WO2003042971A1 Method and device arrangement to improve quality of sound in an audio system
05/22/2003WO2003026162A3 Telephony control in the flight deck
05/22/2003US20030097501 Multi-mode speaker operating from either digital or analog sources
05/22/2003US20030097257 Sound signal process method, sound signal processing apparatus and speech recognizer
05/22/2003US20030095680 Combined receiver and speaker
05/22/2003US20030095674 Microphone system for the fueling environment
05/22/2003US20030095673 Audio-based method and apparatus for controlling operation of an appliance
05/22/2003US20030095667 Computation of multi-sensor time delays
05/21/2003EP1313350A2 Multi-mode speaker operating with digital and analog input signals
05/21/2003EP1312240A2 Audiosystem for an automobile
05/21/2003EP1312239A2 Interference suppression techniques
05/21/2003EP1312162A1 Voice enhancement system
05/21/2003EP1312078A1 Multi-device audio-video with common echo canceling
05/21/2003EP1224837A4 Super directional beamforming design and implementation
05/21/2003CN1419794A System and method for dual microphone signal noise reduction using spectral subtraction
05/20/2003US6567655 Car radio system
05/20/2003US6566960 High back-EMF high pressure subwoofer having small volume cabinet low frequency cutoff and pressure resistant surround
05/20/2003CA2266362C Vehicular loudspeaker system
05/15/2003US20030091203 Dynamic carrier system for parametric arrays
05/15/2003US20030091196 Dynamic carrier system for parametric arrays
05/15/2003US20030091195 Method of and apparatus for producing apparent multidimensional sound
05/14/2003CN1418448A Adaptive microphone matching in multi-microphone directional system
05/14/2003CN1417952A Rodio microphone system, phonetic receiver and radio microphone
05/13/2003US6564072 Radio telecommunication terminal
05/13/2003US6563929 Woofer having ornamental flashing lights
05/13/2003US6563925 Method and apparatus for space-time echo cancellation
05/08/2003WO2003039115A2 Device and method for carrying out multichannel acoustic echo cancellation with a variable number of channels
05/08/2003WO2002023944A3 Acoustic playback device
05/08/2003US20030087667 Wireless microphone system, voice receiving apparatus, and wireless microphone
05/08/2003US20030086580 Digital mixer and digital mixing method
05/08/2003US20030086579 Apparatus and method of controlling signal levels
05/08/2003US20030086576 Position sensor for a loudspeaker
05/07/2003EP1309222A2 Wireless microphone system, voice receiving apparatus and wireless microphone
05/07/2003EP1307761A2 Method for localising direction and localisation arrangement
05/07/2003EP1013140A4 5-2-5 matrix encoder and decoder system
05/07/2003EP0963682A4 Six-axis surround sound processor with improved matrix and cancellation control
05/07/2003CN1416564A Noise reduction appts. and method
05/07/2003CN1108083C Headphone reproducing appts.
05/07/2003CN1108082C Adaptively precompensating audio system
05/06/2003US6560469 Microphone/speaker-contained wireless remote control system for internet device and method for controlling operation of remote controller therein
05/06/2003US6558331 Apparatus and method for harmonic imaging using an array transducer operated in the k31 mode
05/06/2003US6558329 Medical ultrasound receive architecture
05/02/2003EP1306993A2 Digital mixing method and aparatus
05/02/2003EP1305975A2 Adaptive microphone array system with preserving binaural cues
05/01/2003WO2003037034A1 Device for capturing and restoring sound using several sensors
05/01/2003WO2003037033A1 Interference cancelling method and system for multisensor antenna
05/01/2003WO2003037032A1 Method and device for the interference elimination of a redundant acoustic signal
05/01/2003WO2003036406A2 Apparatus and method of controlling signal levels
05/01/2003US20030084079 Method and apparatus for providing an error characterization estimate of an impulse response derived using least squares
05/01/2003US20030081804 Dynamic range compression using digital frequency warping
05/01/2003US20030081797 Audio processing device
05/01/2003US20030081505 Acoustic transducer damping method
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