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)
08/1999
08/04/1999EP0933006A1 Transaural stereo device
08/04/1999EP0801785A4 Industrial headset
08/03/1999US5933507 Highly portable stereo sound system comprising mixing console-amplifier and speakers
08/03/1999US5932850 Speaker system
08/03/1999CA2196779C Method and apparatus for spatially enhancing stereo and monophonic signals
07/1999
07/29/1999WO1999020010A9 Variable bandwidth communication systems and methods
07/29/1999WO1999019854A8 Method and apparatus for sending presence messages
07/29/1999WO1999019820A8 Electronic audio connection system and methods for providing same
07/29/1999DE19802659A1 Cordless telephone apparatus for hands-free operation
07/28/1999CN2331139Y TV receiver set high-frequency cordless earphone
07/27/1999US5930758 Audio signal reproducing apparatus with semiconductor memory storing coded digital audio data and including a headphone unit
07/27/1999US5930376 Multiple channel speaker system for a portable computer
07/27/1999US5930370 In-home theater surround sound speaker system
07/27/1999US5929392 Speaker system
07/27/1999US5928160 Home hearing test system and method
07/22/1999WO1999037120A1 Microphone apparatus for producing signals for surround reproduction
07/22/1999WO1999037118A1 Speaker and electronic apparatus using speaker
07/22/1999DE19860600A1 Car audio system producing phase shift in front section of car
07/15/1999WO1999035886A1 Pseudo-stereophony device
07/06/1999US5920637 Audio induced interference suppression apparatus for video display appliances
07/01/1999WO1998059430A9 Device and method for video recording with audio background
06/1999
06/30/1999CN2327140Y Active voice-box with automatic power-supply switch
06/30/1999CN2327139Y Two-directional sounding super whole-tone loudspeaker
06/30/1999CN1221283A Television set comprising loudspeakers and decoder with surround-sound audio signals
06/29/1999US5917923 Loudspeaker system
06/29/1999US5917916 Audio reproduction systems
06/23/1999CN2325945Y Infrared stereophonic head phone for TV set
06/22/1999US5913834 System for imparting sensory effects across a mother's abdomen to a fetus and monitoring effects on the fetus
06/18/1999CA2225224A1 Device for routing audio signal in vehicle
06/17/1999WO1999030532A1 Apparatus for the creation of a desirable acoustical virtual reality
06/17/1999WO1999009787A8 A distributed stereo system
06/16/1999CN2324740Y Headphone
06/16/1999CN2324737Y Loudspeaker box made of stone
06/09/1999CN2323541Y Ear-hung earset microphone set for handfree wireless telephone
06/08/1999US5910996 Dual audio program system
06/08/1999US5910991 Method and apparatus for a speaker for a personal computer for selective use as a conventional speaker or as a sub-woofer
06/08/1999US5910990 Apparatus and method for automatic equalization of personal multi-channel audio system
06/03/1999WO1999027433A1 Portable computer having folding speakers
06/03/1999WO1999020010A8 Variable bandwidth communication systems and methods
06/02/1999EP0919109A1 Recording and play-back two-channel system for providing a holophonic reproduction of sounds
06/02/1999CN2322347Y Split earphone
06/02/1999CN2322346Y Earphone converter for television set
06/02/1999CN2322345Y Loudspeaker casing with sand box
06/02/1999CN2322344Y Loudspeaker casing with 3.2 SB-Way terminal box
06/02/1999CN1218603A Process and device for transmitting sound
05/1999
05/26/1999EP0917690A1 Method and device for displaying an autostereogram
05/26/1999EP0856238B1 Sound reproduction system for vehicles
05/26/1999CN2321191Y Split plug-in earphone
05/26/1999CN2321190Y Speaker body of plywood
05/20/1999WO1999025152A2 Interactive devices and methods
05/20/1999WO1999025150A1 Audio system comprising audio signal processing circuit
05/19/1999EP0916233A1 Car radio for individual or collective mono or stereo listening
05/19/1999CN2319987Y Small active heavy woofer box
05/14/1999WO1999023856A1 Wireless speaker system
05/14/1999WO1999023855A1 Large scale sound reproduction system having cross-cabinet horizontal array of horn elements
05/12/1999CN2318781Y Stone loudspeaker box
05/11/1999US5903657 Method for externally hanging speakers on computer monitor and a device thereof
05/06/1999WO1999022549A1 Public addressing system
05/05/1999CN1215970A Earphone system with operability improved and terminal equipment system with earphone system
04/1999
04/29/1999WO1999021164A1 A method and a system for processing a virtual acoustic environment
04/27/1999US5898787 Fetal and infant audio bag apparatus
04/27/1999US5898137 Speaker system for television set
04/22/1999WO1999020077A1 Sound-reproducing device mountable on the body of a user
04/22/1999WO1999020010A1 Variable bandwidth communication systems and methods
04/22/1999WO1999019854A1 Method and apparatus for sending presence messages
04/22/1999WO1999019820A1 Electronic audio connection system and methods for providing same
04/22/1999WO1999019804A2 Method and apparatus for sending and receiving lightweight messages
04/22/1999DE19745574A1 Sound reproduction apparatus for multiple channel audio reproduction to be worn on body of user
04/21/1999EP0910226A2 Television set comprising loudspeakers and a decoder for surround-sound audio signals
04/21/1999CN2315747Y Earhole type ear microphone
04/21/1999CN1214606A Sound box with squealing preventing potentiometer unit
04/20/1999US5896461 Compact speakerphone apparatus
04/14/1999EP0909112A1 Wireless system with digital transmission for loudspeakers
04/14/1999EP0908019A1 Acoustic heterodyne device and method
04/14/1999EP0639962B1 Hands free noise canceling headset
04/14/1999CN2314538Y Wireless microphone and earphone assembly
04/13/1999US5894523 Voice delay feedback apparatus
04/08/1999DE19800135C1 Loudspeaker enclosure
04/08/1999DE19743354A1 Portable, external noise recording and reproduction device e.g. for medical tests or speech therapy
04/07/1999EP0906712A1 Center point stereo reproduction system for musical instruments
04/07/1999CN1213262A Acoustic noise reducing
04/07/1999CN1213099A Electronic device
04/07/1999CN1042868C Audio apparatus having karaoke function
04/06/1999US5892182 Speaker enclosure
04/01/1999WO1999016287A1 Method or wireless transmission of audio signals, audio equipment and audio playback device
04/01/1999WO1999016286A1 Car radio system
04/01/1999DE19741595A1 Verfahren zur drahtlosen Übertragung von Audiosignalen, Audiogerät und Tonwiedergabevorrichtung Method for wireless transmission of audio signals, audio and sound reproducing device
04/01/1999DE19737058C1 Visual display unit with flat display and loudspeaker arrangement
03/1999
03/31/1999EP0904985A1 Woofer arrangement under a vehicle seat
03/31/1999EP0904657A1 Monitor has tubular loudspeaker reducing crt's mask vibrations
03/31/1999CN1212599A Apparatus for recording sound having function of recording stereophonic sound and method therefor
03/30/1999US5890125 Method and apparatus for encoding and decoding multiple audio channels at low bit rates using adaptive selection of encoding method
03/30/1999US5889875 Electroacoustical transducing
03/30/1999US5889870 Acoustic heterodyne device and method
03/30/1999US5889867 Stereophonic Reformatter
03/30/1999US5888280 Protective coating composition with early water resistance
03/30/1999US5887286 Ear protector
03/25/1999WO1999014983A1 Utilisation of filtering effects in stereo headphone devices to enhance spatialization of source around a listener
03/25/1999WO1999014982A1 Headphone with a switching-off device
03/25/1999DE19742087A1 Car radio system, esp. with at least two loudspeakers
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