| Patents for H04R 5 - Stereophonic arrangements (11,598) |
|---|
| 12/22/1992 | US5173942 Audio system operable in directional and non-directional modes |
| 12/08/1992 | US5170435 Waveguide electroacoustical transducing |
| 11/25/1992 | CN1066552A Audio system with transient tracking dual voltage power supply |
| 11/03/1992 | US5161197 Acoustic analysis |
| 10/21/1992 | CN1018790B Sound imaging method and apparatus |
| 10/20/1992 | US5157353 Audio system with transient tracking dual voltage power supply |
| 10/08/1992 | DE4110902A1 Stereo headphones with adjustable frequency response - use directional pattern of outer ear and post equalises response of headphone sound transducers by rotation of transducer positions |
| 09/23/1992 | EP0504562A1 Sound reproduction system for sound reproduction with spatial sound effect |
| 09/23/1992 | CN2117009U Stereo recorder with single speaker double output |
| 09/23/1992 | CN2117008U Audio system on shoulders |
| 09/16/1992 | EP0503611A1 Doubly concave high-pitch loudspeakers |
| 09/15/1992 | US5148490 Speaker with tweeter assembly mounted to the interior of the windshield of a vehicle |
| 09/09/1992 | CN1018232B Multidimensional stereophonic sound reproduction system |
| 09/08/1992 | US5146501 Altitude-sensitive portable stereo sound set for dancers |
| 09/01/1992 | US5144678 Automatically switched headset |
| 09/01/1992 | US5144670 Sound output system |
| 08/26/1992 | EP0500294A2 Stereophonic sound reproducing apparatus |
| 08/19/1992 | EP0498794A1 Loudspeaker cabinet |
| 08/18/1992 | US5140637 Device and method for removing vocal signals |
| 08/13/1992 | DE4103817A1 Ball-shape loudspeaker used in sub-woofer satellite system - is fixed on tensioned cables via which it is operated by amplifier, contg. sprung power feeds |
| 08/13/1992 | DE4103613A1 Stereo condenser microphone involving three microphone systems in common housing - are connected via common changeover switch to amplifiers for left and right-hand channels, changeover switch comprising three individual switches |
| 08/06/1992 | DE4102638A1 Sound emitter on sub-woofer-satellite principle - has mono-bass boxes for left- and right-hand channels of sub-woofer |
| 07/29/1992 | CN2111605U Polarity stereo signal generator |
| 07/28/1992 | US5134660 Audio harness for video camera |
| 07/22/1992 | CN2110968U Multifunctional headphone |
| 07/21/1992 | CA1305550C Stereo electroacoustical transducing |
| 07/14/1992 | US5131048 Audio distribution system |
| 07/10/1992 | WO1992012606A1 Improved audio distribution system |
| 07/08/1992 | EP0493986A2 Digital transmitting and receiving apparatus for cordless headphones |
| 07/07/1992 | US5129006 Electronic audio signal amplifier and loudspeaker system |
| 07/01/1992 | EP0492919A2 Television receiver loudspeaker device |
| 06/25/1992 | DE4131712A1 Loudspeaker unit with walls joined at obtuse angles - increases indirect component of sound reproduced into region of overlap of loudspeaker pairs on pentagonal column |
| 06/23/1992 | US5125033 Body sense speaker |
| 06/23/1992 | US5125032 Talk/listen headset |
| 06/23/1992 | US5123133 Orthopedic pillow with speakers |
| 06/17/1992 | CN2107748U Integral karaoke multi-fuction loudspeaker box |
| 06/02/1992 | US5119428 Electro-acoustic system |
| 06/02/1992 | US5119421 Stereo system cabinet with loudspeaker door assembly |
| 05/26/1992 | US5117459 Ambient imaging loudspeaker system |
| 05/21/1992 | DE4036152A1 Audio loudspeaker arrangement for stereo signals - has high frequency loudspeaker angled to bounce sound waves off room wall |
| 05/19/1992 | CA1301074C Video sound |
| 05/13/1992 | EP0484354A1 Stereo headphone for the "in front" location of auditory events generated by stereo headphones. |
| 05/12/1992 | US5113428 Cordless telephone headset |
| 05/06/1992 | CN1016571B Stereo cassette type speaker system |
| 05/06/1992 | CN1016568B Loudspeaker arrangement |
| 04/28/1992 | US5109416 Dipole speaker for producing ambience sound |
| 04/28/1992 | CA1299662C Audio communications module for an office chair |
| 04/17/1992 | WO1992007448A1 Method of improving the quality of sound reproduction and apparatus for carrying out said process comprising at least one loudspeaker emitting in three directions |
| 04/17/1992 | CA2094293A1 Method for improving the quality of sound reproduction and apparatus comprising at least one tridirectional speaker using said method |
| 04/08/1992 | EP0479604A2 Method and apparatus for presentation of on-line directional sound |
| 04/02/1992 | DE4030937A1 High power automobile Hi=Fi system - has auxiliary loudspeakers contained in housing mounted within vehicle boot |
| 03/31/1992 | CA1298208C Extended imaging split mode loudspeaker system |
| 03/24/1992 | US5099519 Headphones |
| 03/17/1992 | US5097514 Approximating the movement of a vibrating surface |
| 03/11/1992 | CN2098766U Stereo radio earphone |
| 03/10/1992 | US5095506 Sound reproduction system utilizing sound extinction device |
| 03/10/1992 | US5095382 Wireless headphone |
| 03/04/1992 | CN2098135U Playback device connecting with stereo playback equipment |
| 03/03/1992 | CA1296652C Method and apparatus for transforming a monaural signal into stereophonic signals |
| 02/19/1992 | CN2096854U Full-position sound recaller |
| 02/04/1992 | US5086464 Telephone headset for the hearing impaired |
| 01/29/1992 | CN2094841U Active speaker box for pocket radio (player) |
| 01/15/1992 | EP0465662A1 Apparatus for reproducing acoustic signals |
| 01/15/1992 | CN2093490U Antinoise headgear for communicating by telephone |
| 01/08/1992 | EP0464217A1 Apparatus for reproducing acoustic signals |
| 12/27/1991 | EP0462571A1 Loudspeaker arrangement in television receiver cabinet |
| 12/18/1991 | CN1057151A Fully closed stereo language play back system |
| 12/17/1991 | US5073945 Loudspeaker system |
| 12/17/1991 | US5073936 Stereophonic microphone system |
| 12/04/1991 | CN2090136U Earphong |
| 12/04/1991 | CN2090135U 音响耳机 Stereo headphones |
| 11/27/1991 | EP0458575A1 Stereo microphone unit |
| 11/26/1991 | US5068897 Mobile acoustic reproducing apparatus |
| 11/21/1991 | EP0457476A2 Camcorder |
| 11/13/1991 | CN2088769U Stereo earphone and pilot system fm stereo transmitter |
| 11/04/1991 | CA2022406A1 Ambient imaging loudspeaker system |
| 10/17/1991 | WO1991015934A1 Loudspeaker cabinet |
| 10/17/1991 | WO1991015902A1 Assistive listening device |
| 10/16/1991 | EP0451991A2 Speaker system and TV with the same |
| 10/16/1991 | EP0451885A1 Audio or video apparatus with in-built loud-speaker |
| 10/08/1991 | US5056148 Output circuit of audio device |
| 09/19/1991 | DE4007841A1 Audio signal processing for stereo headphone - adjusting stereo spectrum width or original audio signal and feeding back variable intensity |
| 09/17/1991 | US5050214 Remote control circuit |
| 09/04/1991 | CN2084265U Frequency modulation stereophonic demodulator |
| 08/28/1991 | EP0442912A1 Loudspeaker arrangement. |
| 08/28/1991 | CN2083821U Multi-function universal earphone |
| 08/21/1991 | CN1053985A Circuit for separating odd from even harmonics in delayed continuous acoustical signals |
| 07/24/1991 | EP0438281A2 Acoustic signal reproducing apparatus |
| 07/23/1991 | US5033577 Room sound reproducing |
| 07/20/1991 | WO1991011080A1 Apparatus for reproducing acoustic signals |
| 07/20/1991 | WO1991011079A1 Apparatus for reproducing acoustic signals |
| 07/09/1991 | US5031220 Mobile stereo speaker set |
| 07/09/1991 | US5031216 Device for stereophonic recording of sound events |
| 06/25/1991 | US5027403 Video sound |
| 06/25/1991 | CA1285229C Spatial reverberation |
| 05/29/1991 | EP0429264A2 Microphone apparatus |
| 05/16/1991 | DE4025973A1 Sound field corrector with sound effect generator(s) - has switches for generator left and right channel changeover |
| 05/08/1991 | CN1051279A Dual track panoramic stereo system |
| 04/09/1991 | US5007091 Procedure and device for facilitating audiovisual observation of a distant object |
| 04/09/1991 | CA1282711C Optimal shadow omniphonic microphone and loudspeaker system |