| Patents for H04R 3 - Circuits for transducers (18,190) |
|---|
| 03/08/2000 | EP0984660A2 Transmitter-receiver having ear-piece type acoustic transducer part |
| 03/08/2000 | EP0983678A1 Method and device for reducing multi-channel acoustic echo and adapting sound to space conditions |
| 03/07/2000 | US6034737 TV set and a combination apparatus of a TV set and an AV amplifier |
| 03/02/2000 | WO2000011908A2 High quality wireless audio speakers |
| 03/02/2000 | WO1999060788A9 Locating an audio source |
| 03/01/2000 | EP0982971A2 Apparatus and method for matching the response of microphones in magnitude and phase |
| 03/01/2000 | CN2367042Y Automatic changing-over switch for loudspeaker |
| 02/29/2000 | US6031918 Device for controlling the volume of a car radio as a function of driving noise |
| 02/24/2000 | WO2000010362A1 Audio device and headphone |
| 02/24/2000 | DE19836997A1 Transmit/receive circuit based on ultrasound-transducer e.g. for examining continuity of materials interfaces |
| 02/22/2000 | US6028946 Microphone with associated amplifier |
| 02/22/2000 | US6028943 Audio amplifier system using a class D amplifier |
| 02/17/2000 | DE19836483A1 Oscillation damping method e.g. for ferroelectric ultrasound sensor for automobile parking aid, uses feedback voltage derived from current through oscillation circuit in parallel with capacitance representing oscillating component |
| 02/10/2000 | WO2000007175A1 Method and apparatus for performing level compensation for an input signal |
| 02/10/2000 | WO2000006309A2 Off-aperture electrical connection for ultrasonic transducer |
| 02/10/2000 | CA2339130A1 Off-aperture electrical connection for ultrasonic transducer |
| 02/08/2000 | US6023514 System and method for factoring a merged wave field into independent components |
| 02/03/2000 | WO2000005926A1 Audio signal controller and reproducing device comprising the same |
| 02/03/2000 | WO2000005922A1 An anti-noise-electret pick-up |
| 02/03/2000 | WO2000005920A1 Digital loudspeaker |
| 02/03/2000 | WO2000005810A1 Series-configured crossover network for electro-acoustic loudspeakers |
| 02/03/2000 | WO2000005809A1 Capacitor-less crossover network for electro-acoustic loudspeakers |
| 02/03/2000 | DE19936346A1 Audio signal processing system for editing and processing |
| 02/03/2000 | CA2304318A1 An anti-noise-electret pick-up |
| 02/02/2000 | EP0976300A1 Electric or electronic circuit element free from microdischarge |
| 02/02/2000 | EP0976208A1 Acoustic feedback elimination using adaptive notch filter algorithm |
| 02/02/2000 | EP0976200A1 Vehicular loudspeaker system |
| 01/26/2000 | EP0975201A2 A method of processing a plural channel audio signal |
| 01/26/2000 | EP0974941A1 Audiovisual playback system |
| 01/26/2000 | EP0974893A1 Sound control circuit for an intelligent digital audiovisual reproduction system |
| 01/26/2000 | EP0974205A1 Echo reducing phone with state machine controlled switches |
| 01/25/2000 | US6016704 Electromechanic transducer with integrated pressure sensor |
| 01/25/2000 | CA2098319C Signal processor for recreating original audio signals |
| 01/19/2000 | EP0973152A2 "Parametric audio system" |
| 01/19/2000 | EP0972426A1 Apparatus and method for bass enhancement |
| 01/19/2000 | EP0972345A1 An audio a/d converter using frequency modulation |
| 01/18/2000 | CA2170811C Noise cancelling device capable of achieving a reduced convergence time and a reduced residual error after convergence |
| 01/13/2000 | WO2000002416A1 Sound reproducing device |
| 01/13/2000 | WO1999060788A8 Locating an audio source |
| 01/12/2000 | EP0971560A2 Multiple voicecoil and driver transducing |
| 01/12/2000 | CN2358656Y Adjustable loudspeaker box |
| 01/06/2000 | WO2000001198A1 System for reducing the effects of acoustically noisy environments on detected sound signals |
| 01/05/2000 | EP0969693A2 Method and circuit for improving the sound impression in a consumer electronics device |
| 01/05/2000 | EP0969692A1 Device and method for processing speech |
| 01/05/2000 | EP0968472A1 Method for computer-assisted extraction of statistically independent digital signals from digital signals |
| 01/05/2000 | EP0903056A4 Superdirective microphone arrays |
| 01/05/2000 | EP0872155A4 Portable speakers with enhanced low frequency response |
| 01/05/2000 | DE19829009A1 Verfahren und Schaltung zur Verbesserung des Klangbildes bei einem Gerät der Unterhaltungselektronik Method and circuit for improving the sound quality in a consumer electronics device |
| 01/04/2000 | CA2195133C Single loud speaker drive system |
| 12/29/1999 | WO1999053612A8 User adjustable volume control that accommodates hearing |
| 12/29/1999 | EP0967833A2 PA system having zone isolator circuits |
| 12/29/1999 | EP0966790A1 Apparatus and methods for the harmonic enhancement of electronic audio signals |
| 12/28/1999 | US6009396 Method and system for microphone array input type speech recognition using band-pass power distribution for sound source position/direction estimation |
| 12/22/1999 | EP0965168A2 Audio crossover circuit |
| 12/22/1999 | EP0880869A4 Portable speakers with phased arrays |
| 12/22/1999 | EP0870298A4 Noise cancellation and noise reduction apparatus |
| 12/22/1999 | CN2355506Y Bass amplifier |
| 12/22/1999 | CN1239638A Power supply for microphone |
| 12/21/1999 | US6005953 Circuit arrangement for improving the signal-to-noise ratio |
| 12/21/1999 | US6005785 Power supply circuit |
| 12/21/1999 | US6003766 Vending machine |
| 12/15/1999 | EP0963682A1 Six-axis surround sound processor with improved matrix and cancellation control |
| 12/14/1999 | US6002776 Directional acoustic signal processor and method therefor |
| 12/08/1999 | EP0962120A1 High-fidelity and high-efficiency analog amplifier combined with digital amplifier |
| 12/08/1999 | CN2353104Y Wire-less horn of automobile |
| 12/07/1999 | US5999631 Acoustic feedback elimination using adaptive notch filter algorithm |
| 11/30/1999 | US5994973 PWM driver |
| 11/25/1999 | WO1999060788A1 Locating an audio source |
| 11/25/1999 | DE19804995A1 Modified electronic low frequency emphasis circuit for audio applications |
| 11/24/1999 | EP0958710A1 Audio system comprising audio signal processing circuit |
| 11/24/1999 | CN1236284A Ear inserting type transmitter receiver |
| 11/23/1999 | US5991417 Process for controlling a programmable or program-controlled hearing aid for its in-situ fitting adjustment |
| 11/18/1999 | WO1999059377A1 Active acoustic impedance control device |
| 11/17/1999 | EP0956656A1 Bi-directional asynchronous telecommunication audio signal processing |
| 11/16/1999 | CA2192163C Self-damping speaker matching device and method |
| 11/11/1999 | WO1999057938A1 Method and device for operating voice-controlled systems in motor vehicles |
| 11/11/1999 | DE19827134A1 Verfahren und Einrichtung zum Betrieb von sprachunterstützten Systemen in Kraftfahrzeugen Method and apparatus for operating voice-controlled systems in motor vehicles |
| 11/11/1999 | DE19818925A1 Electrical communication device for audio signals, e.g. Speech signals |
| 11/10/1999 | EP0954850A2 Audio processing arrangement with multiple sources |
| 11/10/1999 | EP0847661B1 Acoustic device |
| 11/10/1999 | CN1234895A Noise cancellation and noise reduction apparatus |
| 11/10/1999 | CN1234715A Digital electroacoustic transducer |
| 11/09/1999 | US5983192 Audio processor |
| 11/09/1999 | US5982906 Noise suppressing transmitter and noise suppressing method |
| 11/02/1999 | US5978763 Voice activity detection using echo return loss to adapt the detection threshold |
| 11/02/1999 | US5978490 Directivity controlling apparatus |
| 10/28/1999 | DE19818609A1 Noise filtering method for handsfree system |
| 10/27/1999 | EP0952756A2 Ear inserting type transmitter-receiver |
| 10/27/1999 | EP0951800A1 Six-axis surround sound processor with automatic balancing and calibration |
| 10/27/1999 | EP0951799A1 Audio system comprising audio signal processing circuit |
| 10/27/1999 | EP0951798A1 Acoustic feedback correction |
| 10/27/1999 | CN2346131Y Electret anti-noise acoustical pick-up |
| 10/26/1999 | US5974433 High speed M-sequence generator and decoder circuit |
| 10/21/1999 | WO1999053612A1 User adjustable volume control that accommodates hearing |
| 10/21/1999 | WO1999039545A3 Directional microphone assembly for mounting behind a surface |
| 10/21/1999 | CA2328353A1 User adjustable volume control that accommodates hearing |
| 10/21/1999 | CA2268682A1 Ear inserting type transmitter-receiver |
| 10/20/1999 | EP0951201A2 Audio reproducing apparatus |
| 10/19/1999 | US5969838 System for attenuation of noise |
| 10/13/1999 | EP0948875A1 Processing audio signals |