Patents for H04R 5 - Stereophonic arrangements (11,598) |
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04/11/1989 | US4821323 Stereo headphone |
04/04/1989 | US4819270 Stereo dimensional recording method and microphone apparatus |
04/04/1989 | US4819269 Extended imaging split mode loudspeaker system |
03/28/1989 | US4817153 Method and apparatus for transforming a monaural signal into stereophonic signals |
03/28/1989 | US4817152 Stereo system with piezo-electrical film speaker |
03/21/1989 | US4815133 Sound field producing apparatus |
02/21/1989 | US4805731 Sound projection method and apparatus |
02/07/1989 | US4803728 Stereo mixing jack |
01/26/1989 | WO1989000802A1 Extended imaging split mode loudspeaker system |
01/26/1989 | WO1989000800A1 Silencer for playback sound field |
01/25/1989 | EP0300395A2 Device for storing an electrical connecting cable |
11/29/1988 | US4787472 Audio speaker apparatus |
11/03/1988 | WO1988008657A1 Procedure and device for facilitating audiovisual observation of a distant object |
11/01/1988 | US4782533 Stereophonic pillow speaker system |
10/06/1988 | WO1988007803A1 Device for filtering acoustic signals |
09/29/1988 | DE3709397A1 Vorrichtung zur filterung von schallsignalen Apparatus for filtering of acoustic signals |
09/28/1988 | EP0284286A2 Stereo electroacoustical transducing |
09/06/1988 | US4769843 Stereo signal reproducing system |
08/16/1988 | US4764962 Stereo speaker system for walkman-type radio and/or cassette player |
08/16/1988 | US4764961 Cassette type stereo speaker system |
08/16/1988 | US4764960 Stereo reproduction system |
08/10/1988 | CN87214648U Air induction earphone |
08/10/1988 | CN87100417A Stereo technology with a single piece of musical instrument |
07/26/1988 | US4760601 Single speaker, double tuned labyrinth type enclosure |
07/19/1988 | US4758047 Speaker equipped headrest |
07/12/1988 | US4757545 Amplifier circuit for a condenser microphone system |
07/12/1988 | US4756382 Loudspeaker having enhanced response at bass frequencies |
06/28/1988 | US4754486 Motorcycle stereo audio system with VOX intercom |
06/28/1988 | US4753317 Trapezoidal loudspeaker enclosure |
06/21/1988 | US4752961 Microphone arrangement |
06/16/1988 | WO1988004514A1 Loudspeaker installation |
06/15/1988 | EP0270857A2 Sound-reproducing device applied to the head of a person |
06/09/1988 | DE3740358A1 Loudspeaker volume control circuit |
06/07/1988 | US4750208 Audio-band electromechanical vibration converter |
05/24/1988 | CA1237192A1 Method and apparatus for simulating outer ear free field transfer function |
05/10/1988 | CA1236607A1 Microphone arrangement |
04/27/1988 | EP0264785A2 Audio communications module for an office chair |
04/27/1988 | CN87200684U Wireless stereo earphone and transmitter |
04/26/1988 | US4741035 Wide band, low noise artificial head for transmission of aural phenomena |
04/13/1988 | CN87214386U Electronic loudspeaker with contactless |
02/24/1988 | EP0256688A2 Omniphonic microphone and loudspeaker system |
02/16/1988 | CA1232842A1 Tweeter bidirectional radiating |
02/02/1988 | US4723289 Stereo electroacoustic transducing |
12/17/1987 | DE3619950A1 Device for recording stereophonic signals |
12/16/1987 | EP0249428A2 Self-powered, portable stereo speaker pillow |
12/16/1987 | CN86206425U Amplitude-modulating stereo wireless ear-phone |
12/09/1987 | EP0248172A2 Stereophonic loudspeaker |
12/08/1987 | US4712244 Directional microphone arrangement |
11/03/1987 | US4704729 Single acoustic box with spatial effect for stereophonic musical reproduction systems |
10/20/1987 | US4701951 Acoustic imager |
10/15/1987 | DE3710464A1 Schallabstrahlungssystem Sound radiation system |
09/29/1987 | US4696370 Headrest-mounted acoustic device |
09/29/1987 | CA1227558A1 Artificial head measuring system |
09/22/1987 | US4696037 Loudspeaker arrangement comprising one or more flat diaphragms |
09/01/1987 | US4691362 Dihedral loudspeakers with variable dispersion circuits |
07/29/1987 | EP0229795A1 Sound playback system for wearing as a headset |
07/22/1987 | EP0229230A1 Directional-microphone arrangement |
07/21/1987 | US4680856 Process for forming an acoustic monitoring device |
07/14/1987 | US4680492 Audio-frequency electromechanical vibrator |
07/09/1987 | DE3600011A1 Artificial head-like sound recording arrangement |
06/09/1987 | US4672569 Method and apparatus for simulating outer ear free field transfer function |
06/09/1987 | CA1222798A1 Stereo sound and light track system |
04/29/1987 | EP0219665A2 Audio apparatus combination for a motor vehicle |
04/23/1987 | DE3531760A1 Device for electro-acoustic, stereophonic reproduction with a plurality of loudspeakers |
04/21/1987 | US4658932 Simulated binaural recording system |
03/24/1987 | US4653087 Stereo interface telephone ring detector |
02/19/1987 | DE3528516A1 Loudspeaker system for low-dispersion stereo transmission |
02/03/1987 | US4641345 Body-sensible acoustic device |
01/27/1987 | US4638884 Chambered headrest mounting for stereophonic loudspeakers |
01/20/1987 | US4638505 Optimized low frequency response of loudspeaker systems having main and sub-speakers |
01/15/1987 | WO1987000386A1 Sound playback system for wearing as a headset |
01/15/1987 | DE3524487A1 Dem kopf einer person zugeordnete tonwiedergabeeinrichtung The head of a person associated audio playback device |
01/14/1987 | CN85105196A 4-way stereosonic system being compatible with 35 mm film |
12/30/1986 | US4633498 Infrared headphones for the hearing impaired |
12/30/1986 | US4633229 Electronic outdoor warning siren |
12/30/1986 | US4631962 Artificial head measuring system |
12/16/1986 | US4630303 Speaker system having a movable high range unit |
12/10/1986 | EP0204106A2 Loudspeaker system |
12/09/1986 | US4628525 M-S type stereophonic microphone |
11/11/1986 | US4621708 Tweeter bidirectional radiating |
09/23/1986 | CA1211659A1 Ganged-speaker siren system with substantially uniform wavefront patterns |
09/16/1986 | CA1211380A1 Loudspeaker system |
09/16/1986 | CA1211379A1 Loudspeaker arrangement comprising one or more flat diaphragms |
08/19/1986 | US4607381 Signal mixing circuit |
06/17/1986 | US4596034 Sound reproduction system and method |
05/13/1986 | US4589134 Personal sound system |
04/29/1986 | CA1203886A1 Microphone apparatus |
04/08/1986 | US4580653 Portable speaker for vehicles |
04/01/1986 | CA1202572A1 Systems of speaker arrangements |
03/25/1986 | US4578809 Dihedral loudspeakers with variable dispersion circuits |
03/11/1986 | CA1201659A1 Stereophonic baffle |
02/26/1986 | EP0172705A2 Loudspeaker system |
02/25/1986 | US4572325 Stereophonic baffle |
02/18/1986 | US4570742 Microphone apparatus |
02/04/1986 | US4569074 Method and apparatus for reproducing sound having a realistic ambient field and acoustic image |
12/31/1985 | CA1198684A1 Electronic control switch for a power boost amplifier |
12/31/1985 | CA1198683A1 Method and apparatus for reproducing sound having a realistic ambient field and acoustic image |
12/17/1985 | US4558762 Loudspeaker |
11/19/1985 | US4553630 Speaker with tweeter angle adjusting device |
10/02/1985 | EP0156334A2 Method and device for simulating (electronic artificial head) the free-field transmission characteristics of the ear |