| Patents for H04R 5 - Stereophonic arrangements (11,598) |
|---|
| 03/23/1994 | EP0588354A2 Electric apparatus having speaker |
| 03/16/1994 | CN2159090Y Suspension voice-box set |
| 03/03/1994 | WO1994005135A1 Music isolator |
| 03/03/1994 | WO1994005133A1 Microphone and loudspeaker system |
| 03/02/1994 | EP0584971A2 Sound output system |
| 03/02/1994 | EP0584299A1 Improved audio distribution system |
| 02/24/1994 | DE4327973A1 Stereo headphones with forwards sound projection - provided by partition wall across sound exit side of each headphone shell |
| 02/23/1994 | CN1082802A Hi-Fi sound system sound resonator without frequency divider |
| 02/17/1994 | WO1994004010A1 Concert audio system |
| 02/17/1994 | CA2139866A1 Concert audio system |
| 02/09/1994 | CN2155647Y Microphone for gathering material |
| 02/09/1994 | CN2155645Y Cross-compensating speaker |
| 01/26/1994 | EP0325650B1 Extended imaging split mode loudspeaker system |
| 01/25/1994 | US5282251 Speaker device for the hearing impaired |
| 01/19/1994 | CN2153912Y Headgear earphone for telephone |
| 01/19/1994 | CN1080878A Electronic gaming device with pseude-stereophonic sound generating cap abilities |
| 01/12/1994 | EP0578389A2 Audio amplifier circuit and method of operation |
| 12/29/1993 | EP0575895A1 Speaker arrangement for television apparatus |
| 12/28/1993 | US5274709 Speaker device for television receiver |
| 12/23/1993 | WO1993026134A1 Stereophonic sound reproduction device using several loudspeakers in each channel |
| 12/23/1993 | WO1993026083A1 Passive selective headset |
| 12/23/1993 | DE4219689A1 Stereo loudspeaker system mounted on pedestals of pentagonal section - has upper and lower frequency band loudspeakers paired with each other at two different levels on each pedestal. |
| 12/23/1993 | CA2137695A1 Strereophonic sound reproduction device using several loudspeakers in each channel |
| 12/23/1993 | CA2136948A1 Passive selective headset |
| 12/21/1993 | US5272757 Multi-dimensional reproduction system |
| 12/09/1993 | WO1993025008A1 Radio accessory adapter |
| 12/08/1993 | CN2149076Y Dual track earphone |
| 11/30/1993 | CA2021816C Loudspeaker system |
| 11/11/1993 | WO1993022889A1 Method and acoustic system for sonification of enclosed and open spaces |
| 11/11/1993 | WO1993021876A1 Hands free noise canceling headset |
| 11/10/1993 | EP0568716A1 Loudspeaker system |
| 11/09/1993 | US5260920 Acoustic space reproduction method, sound recording device and sound recording medium |
| 10/26/1993 | US5257318 Earphone spacer with electronically variable sound level |
| 10/13/1993 | CN1077321A Radio selective call receiver |
| 10/06/1993 | EP0564229A1 Headphone |
| 09/30/1993 | WO1993019562A1 Dual element headphone |
| 09/29/1993 | CN2143035Y Discrete earphone with socket |
| 09/28/1993 | CA1322533C Loudspeaker arrangement |
| 09/14/1993 | US5245296 Audio amplifier circuit and method of operation |
| 09/07/1993 | US5243656 Audio circuit |
| 08/19/1993 | WO1993015633A1 Seat having sound system with acoustic waveguide |
| 08/17/1993 | US5237418 Audio output circuit in electronic apparatus with composite display function |
| 08/04/1993 | EP0553525A1 Bodily sensed speakers |
| 08/04/1993 | EP0553239A1 Method of improving the quality of sound reproduction and apparatus for carrying out said process comprising at least one loudspeaker emitting in three directions |
| 07/28/1993 | CN1074795A Echo-adding circuit |
| 07/22/1993 | WO1993014607A1 Loudspeaker system |
| 07/22/1993 | WO1993014606A1 Loudspeaker system |
| 07/22/1993 | CA2117383A1 Loudspeaker system |
| 07/21/1993 | CN1074577A Audio equipment |
| 07/21/1993 | CN1021671C Circuit for separating odd from even harmonics in delayed continuous acoustical signals |
| 07/20/1993 | US5229555 Speaker system and tv with the same |
| 07/13/1993 | US5227591 Loudspeaker arrangement |
| 07/10/1993 | WO1993014611A1 Improved audio distribution system |
| 07/10/1993 | CA2105059A1 Audio distribution system |
| 07/07/1993 | EP0550159A2 Loudspeaker for television set |
| 07/07/1993 | EP0549836A1 Multi-dimensional sound reproduction system |
| 06/22/1993 | US5222151 Earphone |
| 06/22/1993 | US5222145 Dual-chamber multi-channel speaker for surround sound stereo audio systems |
| 06/16/1993 | EP0546619A2 Low frequency audio doubling and mixing circuit |
| 06/15/1993 | US5220608 Method and means for stereophonic sound reproduction |
| 06/10/1993 | WO1993011648A1 Device of the dummy head type for recording sound |
| 06/08/1993 | US5218175 Vehicle electroacoustical transducing |
| 06/02/1993 | EP0544232A2 Sound collecting system and sound reproducing system |
| 06/02/1993 | CN2135220Y Earphone |
| 06/01/1993 | US5216209 Loudspeaker system and method for disbursing sounds waves |
| 05/27/1993 | DE4236765A1 Stereo headphones for forwards localisation of audible sounds - has sound transducers supported by holder in bottom half of each earpiece capsule offset from centre vertical plane |
| 05/26/1993 | CN2134763Y Earphone having hearing protection |
| 05/18/1993 | US5212734 Shoulder-mount speaker and audio equipment |
| 05/18/1993 | US5212732 Effects speaker system |
| 05/13/1993 | DE4239200A1 Active loudspeaker box for computer systems - has housing forming compact socket under monitor screen |
| 05/11/1993 | US5210802 Acoustic imaging |
| 05/05/1993 | CN2131589Y Vibration machine |
| 05/04/1993 | US5208868 Headphone overpressure and click reducing |
| 05/04/1993 | US5208493 Stereo expansion selection switch |
| 04/28/1993 | CN2131264Y Electronic frequency-division and voice-frequency power amplification hybrid integrated circuit |
| 04/27/1993 | US5206910 Stereo microphone unit |
| 04/06/1993 | US5201003 High fidelity stereophonic reproduction system |
| 04/06/1993 | US5201002 Stereo sound pillow and method of making |
| 03/31/1993 | EP0534084A1 Speaker system and circuit on the roof of the passenger compartment of a vehicle |
| 03/30/1993 | US5199075 Surround sound loudspeakers and processor |
| 03/17/1993 | EP0520067A4 Improved audio distribution system |
| 03/11/1993 | DE4228027A1 Amplifier-loudspeaker casing with independent energy store - is designed for HI-FI operation in car compartment for high performance. |
| 03/09/1993 | US5193118 Vehicular sound reproducing |
| 03/03/1993 | CN1069605A Micro-system for audio frequency transmitting and receiving |
| 03/02/1993 | US5191177 Tube speaker |
| 03/02/1993 | US5190258 Articulated support assembly |
| 02/25/1993 | DE4227826A1 Digital acoustic signal processor esp. for hearing aid - provides choice of reprodn. of speech in real time or at speed adapted to hearing defect |
| 02/24/1993 | EP0528404A2 Audio signal reproducing device |
| 02/21/1993 | CA2049526A1 Orthopedic pillow with speakers |
| 02/09/1993 | US5185807 Headset with multi-position stirrup assemblies |
| 02/03/1993 | CN1068694A Multi-channel sound frequency power amplifying ic |
| 01/28/1993 | DE4224338A1 Compensating sound signals according to auditorium conditions - varying high frequency range according to results of tests on room before playback |
| 01/19/1993 | US5181248 Acoustic signal reproducing apparatus |
| 01/19/1993 | US5181247 Sound image enhancing |
| 01/19/1993 | US5179747 Pillow radio apparatus |
| 01/07/1993 | DE4120332A1 HI=FI audio loudspeaker housed in seat - incorporating sub-woofer system, amplifier, frequency distribution device and volume and balance controls |
| 12/30/1992 | EP0520067A1 Improved audio distribution system. |
| 12/29/1992 | US5175768 Method and apparatus for enhancing the stereo effect in headsets having cross coupling voice coils |
| 12/23/1992 | WO1992022990A1 Stereo loudspeaker unit with audio mirrors |
| 12/23/1992 | EP0519509A2 Woofer module for use in a television set |