Patents
Sitemap › H04 - Electric communication technique › H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; Deaf-aid sets; Public address systems › H04R 5 - Stereophonic arrangements
Patents for H04R 5 - Stereophonic arrangements (11,598)
05/1981
05/12/1981CA1100881A1 Sound system apparatus and format
04/1981
04/14/1981US4262170 Microphone system for producing signals for surround-sound transmission and reproduction
03/1981
03/25/1981EP0025509A1 Process for stereophonic transmission and means for carrying out the method
03/18/1981EP0025118A1 Arrangement for the acoustic reproduction of signals, presented by means of a right and a left stereo-channel
03/17/1981US4256922 Stereophonic effect speaker arrangement
03/17/1981US4256917 Anhydrous L-lysine monohydrochloride in α-cyrstalline form and preparation thereof
02/1981
02/03/1981US4249037 Pyramid loudspeakers with twin cross-phased mid-range speakers
10/1980
10/28/1980US4230905 Stereophonic system with discrete bass channels
10/07/1980US4227050 Virtual sound source system
10/07/1980US4227047 Dome structure
10/07/1980CA1087104A2 Multiple driver loudspeaker system
09/1980
09/23/1980US4224469 Stereo speaker system
09/17/1980EP0015590A1 Compact stereo apparatus
09/16/1980US4222880 Fluorescent material in light receiver
09/03/1980EP0015186A1 Three-channel acoustic system
08/1980
08/26/1980US4219789 Stereo headphone adapter
08/19/1980US4218583 Varying loudspeaker spatial characteristics
07/1980
07/01/1980US4210784 Speaker system
07/01/1980CA1080844A1 Personal audio listening system
06/1980
06/03/1980US4206324 Pivoted plural microphone assembly
04/1980
04/22/1980US4199657 Planar sound reproducing speaker system
04/15/1980CA1075612A1 Binaural sound reproducing system with acoustic reverberation unit
04/02/1980EP0009116A1 Device and method for the electroacoustic reproduction of sound by earphones, as well as a device for transmitting sound vibrations to the human body
04/01/1980US4196313 Polyphonic sound system
03/1980
03/18/1980US4194086 Suspended stereo console and light show
02/1980
02/26/1980US4190739 High-fidelity stereo sound system
02/26/1980US4190738 Modular furniture structure
02/19/1980CA1072202A1 One-point stereo microphone
02/06/1980EP0007453A1 Varying loudspeaker spatial characteristics
02/05/1980US4187395 Stereo sound recording and reproduction apparatus
01/1980
01/01/1980US4181819 Unitary panel multiple frequency range speaker system
12/1979
12/25/1979CA1068612A Headphone circuit simulating reverberation signals
12/18/1979US4179585 Variable ratio full range direct-reflected pyramid inclined loudspeaker
12/11/1979CA1067829A1 Binaural sound pickup
11/1979
11/06/1979US4173715 Acoustical device
08/1979
08/28/1979US4165797 Adjustable high frequency sound dispersion system
08/28/1979CA1061254A1 Audio pan generator
08/14/1979CA1060350A1 Omniphonic microphone and loudspeaker system
07/1979
07/03/1979CA1057669A1 Dual function sound pick-up device
06/1979
06/19/1979US4158753 Headphone of circumaural design
06/13/1979EP0002413A1 Method and apparatus for recording sound in a room
05/1979
05/22/1979US4156117 Speaker system
04/1979
04/17/1979US4149610 Acoustic headsets
03/1979
03/27/1979CA1051350A1 Headphone system
03/13/1979CA1050655A1 Microphone apparatus
02/1979
02/20/1979CA1049134A1 Stereo microphone apparatus
02/20/1979CA1048937A1 Impulse noise reduction system
01/1979
01/09/1979US4133975 Loudspeaker system with broad image source with directionality control for the tweeter
01/09/1979CA1045985A1 Loudspeaker system with broad image source
10/1978
10/31/1978US4122910 Omniphonic microphone and loudspeaker system
10/10/1978US4119798 Binaural multi-channel stereophony
09/1978
09/05/1978US4112256 Loudspeaker and stereophonic loudspeaker system
09/05/1978CA1037877A1 Decoder apparatus for use in a multidirectional sound system
08/1978
08/29/1978US4110583 Earphone construction
08/15/1978US4107461 Environment for demonstrating a stereo loudspeaker system
06/1978
06/20/1978US4096353 Microphone system for producing signals for quadraphonic reproduction
05/1978
05/16/1978US4090148 Circuit pattern for a protection circuit of a stereo amplifier
05/09/1978US4088902 Channel coupling
05/09/1978US4088849 Headphone unit incorporating microphones for binaural recording
05/02/1978US4087629 Binaural sound reproducing system with acoustic reverberation unit
04/1978
04/11/1978US4084139 Shoulder supported stereophonic radio receiver
02/1978
02/21/1978US4075438 Stereo speaker system
02/14/1978US4074084 Method and apparatus for receiving sound intended for stereophonic reproduction
02/07/1978US4072821 Microphone system for producing signals for quadraphonic reproduction
01/1978
01/24/1978US4070553 Personal audio listening system
01/24/1978US4070547 One-point stereo microphone
01/24/1978US4070546 Portable stereo audio apparatus
01/10/1978US4068093 Device for transmitting audio-frequency signals
01/10/1978US4068091 Binaural sound pickup
12/1977
12/06/1977US4061877 Speaker system
11/1977
11/29/1977US4060696 Binaural four-channel stereophony
11/15/1977US4058675 Loudspeaker system for use in a stereophonic sound reproduction system
10/1977
10/25/1977US4055170 Health promoting apparatus
08/1977
08/16/1977US4042791 Stereophonic head rest
08/16/1977US4042779 Coincident microphone simulation covering three dimensional space and yielding various directional outputs
07/1977
07/26/1977US4038499 Stereophonic pillow speaker system
07/19/1977US4037064 Stereo microphone apparatus
07/19/1977US4037052 Sound pickup assembly
05/1977
05/31/1977US4027112 Head-rest and loudspeaker combination
05/17/1977US4023566 Body-supporting means with adjustable vibratory means in the audible frequency range
04/1977
04/26/1977US4020284 Speaker system
03/1977
03/01/1977US4010335 Microphone apparatus
02/1977
02/01/1977US4006311 Stereophonic sound reproducing apparatus
01/1977
01/25/1977US4005278 Headphone
10/1976
10/12/1976US3985960 Stereophonic sound reproduction with acoustically matched receiver units effecting flat frequency response at a listener's eardrums
10/12/1976US3984885 4-Channel headphones
10/05/1976US3984636 Quadraphonic headphone with ambience programmer
09/1976
09/14/1976US3980829 Wide angle cylindrical wave loudspeaker extending approximately from floor to ceiling height with a lens
08/1976
08/24/1976US3976162 Personal speaker system
07/1976
07/13/1976US3969583 Method of stereophonic recording
03/1976
03/30/1976US3947635 Integrated stereo speaker system
03/16/1976US3944941 Switching circuit for use with balanced transformerless amplifier
03/16/1976US3944020 Speaker headrest for motor vehicles
03/09/1976US3943564 Stereophonic recording and playback apparatus
02/1976
02/24/1976US3940560 Quadriphonic sound pick-up and reproduction devices
02/17/1976US3939310 Stereophonic headset with ear to ear acoustical passageway
01/1976
01/27/1976US3934674 Acoustic headsets
01/20/1976US3933219 Speaker system
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