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