H04R 3 - Circuits for transducers

Patents for H04R 3 - Circuits for transducers (18,190)
12/2001
12/04/2001	US6327369 Loudspeakers comprising panel-form acoustic radiating elements
11/2001
11/29/2001	WO2001091513A2 Method for noise suppression in an adaptive beamformer
11/29/2001	WO2001091512A2 Directional microphone arrangement and method for signal processing in a directional microphone arrangement
11/29/2001	WO2001091510A1 Loudspeaker enclosure system
11/29/2001	WO2001091314A2 Method and means for receiving a digital transmission comprising a plurality of digital audio signals and for simultaneous reproduction of these signals as analog audio programmes
11/29/2001	WO2001037519A3 Vehicle accessory microphone
11/29/2001	US20010046305 Power adapter having a speaker for an electronic device
11/29/2001	US20010046301 Active noise control system
11/28/2001	EP1158488A2 Active noise control system
11/28/2001	EP1157588A1 Directional microphone array system
11/28/2001	CN1324526A Method and device for developing a virtual speaker distant from the sound source
11/24/2001	CA2348276A1 Active noise control system
11/22/2001	WO2001089083A1 Complementary transfer function design of crossover filters in loudspeaker systems
11/22/2001	WO2001026412A3 Multiple speaker
11/22/2001	US20010043652 Digital pulse-width-modulation generator
11/22/2001	US20010043378 Echo-cancelling optical microphone
11/22/2001	DE10124369A1 On-board vehicle navigation system with voice recognition control has microphone connected to system monitor to reduce cabling requirements and allow microphone to be situated near driver
11/20/2001	US6320967 Passenger vehicles incorporating loudspeakers comprising panel-form acoustic radiating elements
11/15/2001	WO2001087011A2 Interference suppression techniques
11/15/2001	WO2001087010A1 Fft-based technique for adaptive directionality of dual microphones
11/15/2001	WO2001087009A2 Gas flow sensor, speaker system and microphone
11/15/2001	WO2001011918A3 Compensation system and method for sound reproduction
11/15/2001	WO2000044200A9 Intelligent speaker tuning using non-volatile memory
11/15/2001	US20010041476 Connector, multi-channel audio system, electronic apparatus, and cable for connection
11/15/2001	US20010040971 Television receiver with memory containing audio equalization data for speciific receiver housing
11/15/2001	CA2685434A1 Interference suppression techniques
11/15/2001	CA2421291A1 Gas flow sensor, speaker system and microphone
11/14/2001	CN1322348A Speech recognition apparatus and consumer electronics system
11/13/2001	US6317703 Separation of a mixture of acoustic sources into its components
11/13/2001	US6317501 Microphone array apparatus
11/08/2001	WO2001084884A2 Audio system
11/08/2001	WO2001084881A1 Reception system for multisensor antenna
11/08/2001	WO2001084880A2 Infra bass
11/08/2001	US20010038700 Speaker driving circuit
11/08/2001	US20010038699 Automatic directional processing control for multi-microphone system
11/08/2001	US20010038309 Filter circuit
11/08/2001	DE10026078C1 Directional microphone set has 5 microphones with figure 8 directional characteristic arranged to provide sine and cosine signals
11/08/2001	CA2407646A1 Reception system for multisensor antenna
11/07/2001	EP1152637A1 Microphone exhibiting frequency-dependent directivity
11/07/2001	EP1152636A1 Sound-collecting device
11/07/2001	EP1151630A2 Method and system of compensating for boundary effects on a primary sound source
11/07/2001	EP1151395A2 High quality wireless audio speakers
11/06/2001	US6313697 Device for amplifying signals
11/06/2001	CA2234738C Method and apparatus for cancelling multi-channel echo
11/01/2001	WO2001082651A1 Multi-channel surround sound mastering and reproduction techniques that preserve spatial harmonics in three dimensions
11/01/2001	WO2001082649A1 Semiconductor electret capacitor microphone
11/01/2001	WO2001080708A2 Systems and methods for reducing secondary hot spots in a phased array focused ultrasound system
11/01/2001	WO2001069779B1 System and method of producing direct audio from a power supply
11/01/2001	US20010036285 Infra bass
11/01/2001	US20010036278 Ultra bass II
11/01/2001	CA2406926A1 Multi-channel surround sound mastering and reproduction techniques that preserve spatial harmonics in three dimensions
10/2001
10/31/2001	EP1150547A1 Optical microphone portable telephone
10/31/2001	EP1150544A2 Method for transmission of a high-frequency signal
10/31/2001	EP1150543A1 Directional optical microphone
10/31/2001	EP1150542A1 Video camera with microphone
10/31/2001	EP1150541A1 Sound-collecting device
10/31/2001	EP1150540A1 Sound collector
10/31/2001	DE10020857A1 Mobile Telekommunikationseinheit und Microrecordplayer mit 3D-Sound Mobile telecommunication unit and Micro Record Player with 3D sound
10/30/2001	US6310959 Tuned order crossover network for electro-acoustic loudspeakers
10/25/2001	US20010034214 Wireless microphone apparatus and transmitter device for a wireless microphone
10/25/2001	US20010033198 Electronic devices comprising an audio amplifier and methods for controlling such electronic devices
10/25/2001	DE19843731C2 Vorrichtung zur Schallwandlung Device for sound conversion
10/24/2001	EP1148639A1 Electronic devices comprising an audio amplifier and methods for controlling such electronic devices
10/24/2001	EP1148637A2 Level adjustment circuit
10/24/2001	CN2456424Y Power amplifier with compensation to movement distortion
10/24/2001	CN2456390Y Wireless earphone
10/23/2001	US6307942 Panel-form microphones
10/23/2001	US6307482 Silenceable speaker with pre-announce tone detection
10/18/2001	WO2001078447A1 Ultra bass ii
10/18/2001	WO2001078060A2 Rhythmic apparatus, rhythmic accompaniment method and electronic transducer
10/18/2001	WO2001019130A3 Audio signal processing
10/17/2001	EP1145593A2 Loudspeaker protection system having frequency band selective audio power control
10/17/2001	EP0938830A4 Improved directional microphone audio system
10/17/2001	EP0746959A4 Digitally controlled analog cancellation system
10/16/2001	US6304661 Loudspeakers comprising panel-form acoustic radiating elements
10/16/2001	US6304654 Telephone handset interface with feedback control
10/11/2001	WO2001076319A2 Method and apparatus for voice signal extraction
10/11/2001	WO2001037435A3 Super directional beamforming design and implementation
10/11/2001	WO2000068703A3 Method for localising direction and localisation arrangement
10/11/2001	US20010029445 Device for shaping a signal, notably a speech signal
10/11/2001	US20010028721 Control apparatus
10/11/2001	US20010028720 Null adaptation in multi-microphone directional system
10/11/2001	US20010028719 Apparatus for detecting direction of sound source and turning microphone toward sound source
10/11/2001	US20010028718 Null adaptation in multi-microphone directional system
10/11/2001	DE10116475A1 An einem Fahrzeug montierte Geräuschsteuer/regelvorrichtung A vehicle-mounted noise control / regulating system
10/11/2001	DE10015801A1 Digital radio/wireless loudspeaker for transmitting audio signals uses a high-frequency receiver component to pick up digital audio data produced by a receiver signal through a data recovery stage and a signal processor stage.
10/11/2001	CA2404071A1 Method and apparatus for voice signal extraction
10/10/2001	EP1143764A1 Speaker device
10/10/2001	EP1142446A2 Speaker system
10/10/2001	EP1141936A1 Controlled acoustic waveguide for soundproofing
10/04/2001	WO2001074117A1 Spatial sound steering system
10/04/2001	US20010026624 Level adjustment circuit
10/04/2001	US20010026622 Vehicle-mounted noise control apparatus
10/04/2001	US20010026499 Underwater detection apparatus
10/04/2001	DE10114026A1 Audio system for electronic musical instrument, modifies frequency characteristics of music sound automatically depending on the location of instrument
09/2001
09/27/2001	WO2001072085A2 Directional processing for multi-microphone system
09/27/2001	WO2001071953A1 Installation with piezoelectric element for equipping a structure and piezoelectric element for same
09/27/2001	US20010024509 Subwoofer with active and passive drivers
09/27/2001	US20010024505 Audio system in electronic musical instrument
09/26/2001	EP1135966A2 Bending wave acoustic devices

1 ... 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 ... 182