| Patents for H04S 1 - Two-channel systems (4,182) |
|---|
| 02/07/1989 | US4803727 Transmission system |
| 01/26/1989 | WO1989000802A1 Extended imaging split mode loudspeaker system |
| 11/17/1988 | WO1988009105A1 Paradoxical hearing aid |
| 11/01/1988 | US4782530 Non-recursive system for expanding the stereo base of stereophonic acoustic diffusion apparatus |
| 09/14/1988 | EP0282017A2 Stereo processing system |
| 09/06/1988 | US4769843 Stereo signal reproducing system |
| 08/16/1988 | US4764960 Stereo reproduction system |
| 08/03/1988 | EP0276948A2 Sound field control device |
| 07/27/1988 | EP0276159A2 Three-dimensional auditory display apparatus and method utilising enhanced bionic emulation of human binaural sound localisation |
| 07/19/1988 | US4759066 Sound system with isolation of dimensional sub-speakers |
| 07/06/1988 | EP0273567A1 A transmission system |
| 05/31/1988 | US4748669 Stereo enhancement system |
| 05/31/1988 | CA1237479A1 Am stereo receivers having platform motion protection |
| 04/19/1988 | US4739513 Method and apparatus for measuring and correcting acoustic characteristic in sound field |
| 04/06/1988 | EP0262160A1 Stereo enhancement system. |
| 03/15/1988 | US4731848 For creating illusory sound sources in three dimensional space |
| 02/02/1988 | US4723289 Stereo electroacoustic transducing |
| 12/17/1987 | DE3620170A1 Circuit arrangement for a sound reproduction device |
| 12/08/1987 | CA1230060A2 High fidelity stereophonic reproduction system |
| 10/13/1987 | US4700389 Stereo sound field enlarging circuit |
| 10/08/1987 | WO1987006090A1 Stereo enhancement system |
| 10/06/1987 | US4698670 Cable stereo apparatus |
| 10/06/1987 | CA1227756A1 Apparatus for generating a pseudo-stereo signal |
| 09/22/1987 | US4696035 System for expanding the stereo base of stereophonic acoustic diffusion apparatus |
| 09/15/1987 | US4694497 Automotive multi-speaker audio system with automatic echo-control feature |
| 09/01/1987 | US4691362 Dihedral loudspeakers with variable dispersion circuits |
| 08/12/1987 | EP0231616A2 Am stereo receivers having platform motion protection |
| 07/15/1987 | EP0228851A2 Sound field expansion systems |
| 07/07/1987 | US4679237 Correction control circuit for AM stereophonic receivers |
| 03/24/1987 | US4653096 Device for forming a simulated stereophonic sound field |
| 03/24/1987 | US4653095 AM stereo receivers having platform motion protection |
| 03/09/1987 | EP0207084A4 Spatial reverberation. |
| 03/03/1987 | US4648117 Mobile sound field correcting device |
| 02/19/1987 | DE3528516A1 Loudspeaker system for low-dispersion stereo transmission |
| 02/18/1987 | CN86200576U Stereophonic coding system |
| 02/10/1987 | US4642812 Sound field enlarging device and method |
| 01/07/1987 | EP0207084A1 Spatial reverberation. |
| 01/07/1987 | CN86204420U Signal synchronous synthesizer for recorder |
| 12/31/1986 | CN85104223A Wireless connecting method for earphone electro-acoustic conversion |
| 12/30/1986 | US4633497 Separation control circuit |
| 11/25/1986 | US4625326 Apparatus for generating a pseudo-stereo signal |
| 11/11/1986 | US4622691 Mobile sound field correcting device |
| 08/26/1986 | CA1210336A2 Electronic stereo reverberation device with doubler |
| 08/19/1986 | US4607381 Signal mixing circuit |
| 07/29/1986 | US4603429 Dimensional sound recording and apparatus and method for producing the same |
| 06/17/1986 | US4596034 Sound reproduction system and method |
| 05/13/1986 | US4589128 Process for the production of a sound recording and a device for carrying out the process |
| 05/09/1986 | WO1986002791A1 Spatial reverberation |
| 04/29/1986 | US4586192 Soundstage boundary expansion system |
| 04/01/1986 | CA1202572A1 Systems of speaker arrangements |
| 03/25/1986 | US4578809 Dihedral loudspeakers with variable dispersion circuits |
| 03/25/1986 | US4577540 Electronic musical instrument having a pan-pot function |
| 02/27/1986 | WO1986001363A1 Apparatus for reproducing sound field |
| 02/04/1986 | US4569074 Method and apparatus for reproducing sound having a realistic ambient field and acoustic image |
| 01/28/1986 | US4567607 Stereo image recovery |
| 01/02/1986 | EP0166543A2 Mobile sound field correcting device |
| 12/27/1985 | EP0165733A2 Method and apparatus for measuring and correcting acoustic characteristic in sound field |
| 12/18/1985 | EP0164973A2 Mobile sound field correcting device |
| 11/26/1985 | US4555795 Monaural to binaural audio processor |
| 11/06/1985 | EP0160431A2 Sound field correction system |
| 10/29/1985 | US4550343 Video camera apparatus |
| 10/29/1985 | CA1196066A2 Dividing circuit |
| 10/29/1985 | CA1195933A1 Method and apparatus for reproducing sound having an expanded acoustic image |
| 09/24/1985 | CA1194222A1 Method and apparatus of recording or reproducing stereophonic information in a magnetic record carrier, magnetic record carrier and amplifier circuit to be used in conjunction with an apparatus for carrying out the method |
| 08/20/1985 | US4536716 Stereo amplifier circuit for bichannel signals |
| 08/13/1985 | US4535471 Compression/expansion device |
| 08/07/1985 | EP0150976A2 Soundstage boundary expansion system |
| 07/17/1985 | EP0148568A1 Stereo image recovery |
| 06/11/1985 | CA1188624A1 Fm stereo apparatus and method |
| 06/04/1985 | US4521906 Speaker systems for producing balanced stereo images at multiple locations |
| 05/22/1985 | EP0142213A1 Apparatus for generating a pseudo-stereo signal |
| 04/30/1985 | CA1186407A1 Video disc player with selectively enabled audio signal expander circuitry |
| 04/02/1985 | US4509191 Electronic stereo reverberation device |
| 04/02/1985 | US4509185 Time domain audio panner |
| 03/19/1985 | CA1184259A1 Stereo/monaural selecting circuit |
| 02/05/1985 | US4498111 Method and apparatus for recording or reproducing stereophonic information in a magnetic record carrier |
| 01/29/1985 | US4497064 Method and apparatus for reproducing sound having an expanded acoustic image |
| 01/23/1985 | EP0131799A1 Video camera apparatus |
| 01/22/1985 | US4495637 Apparatus and method for enhanced psychoacoustic imagery using asymmetric cross-channel feed |
| 12/18/1984 | US4489432 Method and apparatus for reproducing sound having a realistic ambient field and acoustic image |
| 12/04/1984 | CA1178897A1 Switching arrangement for a stereophonic sound synthesizer |
| 10/23/1984 | US4479235 Switching arrangement for a stereophonic sound synthesizer |
| 10/03/1984 | EP0120126A2 Systems of speaker arrangements |
| 09/26/1984 | EP0119235A1 Method and device for the reception and restitution of acoustic events |
| 08/28/1984 | US4468537 Sound system having suppression of AM stereophonic receiving circuit-induced noise |
| 08/14/1984 | US4466117 Microphone for stereo reception |
| 08/07/1984 | US4464781 Equalizer apparatus |
| 06/26/1984 | US4457012 FM Stereo apparatus and method |
| 05/29/1984 | US4451927 Separation correction method and apparatus for plural channel transmission system |
| 05/15/1984 | US4449229 Signal processing circuit |
| 03/29/1984 | WO1984001257A1 Method and device for the reception and restitution of acoustic events |
| 03/06/1984 | CA1163202A1 Loudspeaker or microphone arrangement having a direction - and frequency-independent behavior |
| 02/21/1984 | US4433209 Stereo/monaural selecting circuit |
| 02/08/1984 | EP0100153A2 Apparatus and method for enhanced psychoacoustic imagery |
| 01/11/1984 | EP0097982A2 FM stereo apparatus |
| 01/03/1984 | US4424416 Acoustic reproducing apparatus |
| 11/15/1983 | US4415768 Tuning apparatus and method |
| 10/19/1983 | EP0091874A1 Method and device for wireless stereophonic transmission from a sound reproducing apparatus to loudspeakers |
| 10/18/1983 | US4410761 Stereo loudspeaker system for a picture reproducing screen |
| 10/04/1983 | US4408095 Acoustic apparatus |