| Patents for H04R 3 - Circuits for transducers (18,190) |
|---|
| 04/07/1998 | US5737428 For detecting the highest relative signal of input signals |
| 04/07/1998 | US5737409 Echo removing apparatus |
| 04/02/1998 | WO1998013942A1 Vehicular loudspeaker system |
| 04/01/1998 | EP0833302A2 Sound field reproducing device |
| 03/31/1998 | US5734729 Apparatus for eliminating audio noise when power is cycled to a computer |
| 03/31/1998 | US5734728 Portable sound speaker system and driving circuit therefor |
| 03/31/1998 | US5734715 Process and device for adaptive identification and adaptive echo canceller relating thereto |
| 03/31/1998 | US5734320 Emergency warning gear having a multitude of functions |
| 03/25/1998 | EP0831458A2 Method and apparatus for separation of sound source, program recorded medium therefor, method and apparatus for detection of sound source zone; and program recorded medium therefor |
| 03/24/1998 | US5732143 Noise cancellation apparatus |
| 03/24/1998 | US5732142 Musical sound reproduction controller with two-stage adjustment of tone |
| 03/17/1998 | US5729614 For amplifying a sound while suppressing a howling noise |
| 03/17/1998 | US5729611 Loudspeader overload protection |
| 03/11/1998 | EP0648166B1 Process and circuitry for supplying signals to loudspeakers and other electric consumers arranged in vehicle doors |
| 03/11/1998 | CN1176042A Apparatus and method for adaptively precompensating for loudspeaker distortions |
| 03/05/1998 | WO1998009477A1 Signal correcting device, signal correcting method, and coefficient adjusting device and coefficient adjusting method for signal correcting device |
| 03/05/1998 | DE19635878A1 Device for improving the transmission signal of an echo reduction device e.g. for open line telephone system |
| 03/04/1998 | EP0826140A1 Intensity acoustic calibrator |
| 03/04/1998 | CN2275750Y Contactless electric horn |
| 03/03/1998 | US5724485 Adaptive cross correlator apparatus comprising adaptive controller for adaptively adjusting transfer functions of two filters |
| 03/03/1998 | CA2122371C Moving picture coding apparatus |
| 02/25/1998 | EP0824845A1 Process for controlling a programmable or program-controlled hearing aid for its in-situ fitting adjustment |
| 02/25/1998 | EP0824786A1 Audio crossover circuit |
| 02/25/1998 | CN1174623A Voice activity detection |
| 02/24/1998 | US5721784 Asymmetrical driver for asymmetrical loudspeakers |
| 02/19/1998 | WO1998007294A1 High back emf, high pressure subwoofer |
| 02/19/1998 | WO1998007234A1 Apparatus and methods for the harmonic enhancement of electronic audio signals |
| 02/19/1998 | CA2263177A1 High back emf, high pressure subwoofer |
| 02/19/1998 | CA2262736A1 Apparatus and methods for the harmonic enhancement of electronic audio signals |
| 02/18/1998 | CN2274854Y Frequence modulated receiver of wireless microphone |
| 02/12/1998 | WO1997049196A3 Echo suppressor and non-linear processor of echo canceller |
| 02/12/1998 | DE19733888A1 Electric circuit for emphasising an audio zoom signal e.g. for camcorder |
| 02/11/1998 | EP0823829A2 Digital hearing aid system |
| 02/11/1998 | CN1173105A Pseudo-zero impedance loudspeaking technology and loudspeaking system |
| 02/11/1998 | CN1173007A Circuit for emphasizing audio zooming signal |
| 02/10/1998 | US5717773 Sound system gain and equalization circuit |
| 02/10/1998 | US5717772 Method and apparatus for suppressing acoustic feedback in an audio system |
| 02/10/1998 | US5717766 Stereophonic sound reproduction apparatus using a plurality of loudspeakers in each channel |
| 02/07/1998 | CA2212131A1 Digital hearing aid system |
| 02/05/1998 | WO1998005135A1 Acoustic feedback elimination using adaptive notch filter algorithm |
| 02/04/1998 | CN1172573A Noise cancellation headset for use with stand or worn on ear |
| 02/04/1998 | CN1172422A Noise cancellation apparatus |
| 02/03/1998 | US5715321 Noise cancellation headset for use with stand or worn on ear |
| 02/03/1998 | US5715319 Method and apparatus for steerable and endfire superdirective microphone arrays with reduced analog-to-digital converter and computational requirements |
| 01/28/1998 | CN2273448Y Device for preventing accomplice from ganging up to make a false confession |
| 01/22/1998 | WO1998002978A1 Acoustic heterodyne device and method |
| 01/21/1998 | EP0820210A2 A method for elctronically beam forming acoustical signals and acoustical sensorapparatus |
| 01/20/1998 | US5710823 Howling remover having cascade connected equalizers suppressing multiple noise peaks |
| 01/15/1998 | WO1998001956A2 Microphone noise rejection system |
| 01/15/1998 | WO1997025790A3 Noise cancellation and noise reduction apparatus |
| 01/15/1998 | CA2259641A1 Microphone noise rejection system |
| 01/14/1998 | EP0818122A1 Improvements in or relating to loudspeakers |
| 01/14/1998 | EP0818121A1 Sound pick-up and reproduction system for a headset in a noisy environment |
| 01/14/1998 | EP0818120A2 Audio bass speaker driver circuit |
| 01/14/1998 | EP0772764B1 Process and device for determining the tonality of an audio signal |
| 01/13/1998 | US5708354 Portable electromagnetic acoustic transducer pulser controller |
| 01/08/1998 | DE19628014A1 Frequency dividing network for loudspeaker enclosures |
| 01/07/1998 | EP0815641A1 Dual action automatic sound level control |
| 01/06/1998 | US5706357 Sound signal output circuit and method |
| 01/06/1998 | CA2071708C Audio surround system with stereo enhancement and directivity servos |
| 12/31/1997 | CN1169092A Loud-speaker system |
| 12/31/1997 | CN1169077A Apparatus and method for providing telephone user with control of threshold volume at which user's voice will take control of half-duplex speakerphone conversation |
| 12/31/1997 | CN1169076A Telephone including electromechanical transducer, method of adapting frequency response of such transducer and method of coding melody |
| 12/29/1997 | EP0814633A1 Digital loudspeaker with sound volume control |
| 12/24/1997 | WO1997049196A2 Echo suppressor and non-linear processor of echo canceller |
| 12/23/1997 | US5701352 Tone suppression automatic gain control for a headset |
| 12/18/1997 | WO1997048253A1 Electroacoustic transducer |
| 12/18/1997 | WO1997048252A1 Method and apparatus for localization of an acoustic source |
| 12/18/1997 | CA2257447A1 Electroacoustic transducer |
| 12/17/1997 | EP0813331A2 Apparatus and method for providing a telephone user with control of the threshold volume at which the user's voice will take control of a half-duplex speakerphone conversation |
| 12/17/1997 | EP0813296A2 Amplifier arrangements with high damping factor |
| 12/17/1997 | EP0812492A1 Dual audio program system |
| 12/11/1997 | WO1997047090A1 An audio a/d converter using frequency modulation |
| 12/11/1997 | CA2207529A1 Apparatus and method for providing a telephone user with control of the threshold volume at which the user's voice will take control of a half-duplex speakerphone conversation |
| 12/10/1997 | EP0811301A1 Apparatus and method for adaptively precompensating for loudspeaker distortions |
| 12/10/1997 | CN1167419A Sound equipment for vehicle |
| 12/04/1997 | WO1997046048A1 Superdirective microphone arrays |
| 12/04/1997 | WO1997045995A1 Arrangement for suppressing an interfering component of an input signal |
| 12/03/1997 | EP0810810A2 Digital loudspeaker and sound reproduction system employing such a loudspeaker |
| 12/03/1997 | EP0809906A1 Very low power cordless headset system |
| 12/03/1997 | EP0809900A2 An adaptive noise cancelling arrangement, a noise reduction system and a transceiver |
| 12/03/1997 | EP0809841A1 Voice activity detection |
| 12/02/1997 | US5694476 Adaptive filter for correcting the transfer characteristic of electroacoustic transducer |
| 12/02/1997 | US5694474 Adaptive filter for signal processing and method therefor |
| 11/26/1997 | EP0809413A1 Audio devide for a vehicle |
| 11/26/1997 | EP0809353A2 Amplifier for cancelling noise between circuit systems |
| 11/25/1997 | US5692059 Two active element in-the-ear microphone system |
| 11/25/1997 | US5692058 Dual audio program system |
| 11/25/1997 | US5692057 Wireless electronic power defeat techniques |
| 11/25/1997 | US5692051 Television receiver |
| 11/25/1997 | CA2060661C Device for improving bass reproduction in loudspeaker systems with closed housing |
| 11/19/1997 | EP0808076A1 Surround system |
| 11/19/1997 | CN1165468A Thin wall coaxial multi-layer barrel-shaped louderspeaker box with audio-frequency amplifier capable of tuning according to sound chamber |
| 11/18/1997 | US5689570 Sound reproducing array processor system |
| 11/13/1997 | WO1997042789A1 Circuit, audio system and method for processing signals, and a harmonics generator |
| 11/12/1997 | EP0806092A1 A directional acoustic signal processor and method therefor |
| 11/05/1997 | EP0723733A4 Microphone system for teleconferencing system |
| 11/05/1997 | CN2266851Y Wired and multiplex wireless microphone expanding device for audio-video compact disk machine |
| 11/04/1997 | US5684882 System for selective sound capture for reverberant and noisy environment |
| 10/30/1997 | WO1997040642A1 Six-axis surround sound processor with automatic balancing and calibration |