Patents
Patents for H04S 7 - Indicating arrangements; Control arrangements, e.g. balance control (4,080)
06/1994
06/14/1994CA1330200C Surround-sound system
05/1994
05/17/1994US5313014 Electronic musical instrument having sound image localization circuit
05/11/1994WO1994010816A1 Methods and apparatus for producing directional sound
05/11/1994WO1994010815A1 Method for generating three-dimensional sound
04/1994
04/26/1994US5307415 Surround processor with antiphase blending and panorama control circuitry
04/19/1994US5305439 Method and apparatus for time-shared processing of different data word sequences
04/19/1994US5305386 Apparatus for expanding and controlling sound fields
04/05/1994US5301236 System for producing stereo-simulated signals for simulated-stereophonic sound
03/1994
03/22/1994US5297209 System for calibrating sound field
03/17/1994WO1994001981A3 Adaptive audio systems and sound reproduction systems
03/15/1994US5295189 Control voltage generator for surround sound processor
03/03/1994WO1994005135A1 Music isolator
02/1994
02/10/1994DE4326746A1 Stereo loudspeaker vol. control equipment responsive to ambient noise - provides feedback from both audio channel amplifiers via adaptive digital filters for subtraction from noise microphone signal
02/08/1994US5285503 Apparatus for reproducing sound field
02/02/1994CN2155118Y Externally connecting level display of sounder
02/02/1994CN2155117Y Portable digital control modulation station
01/1994
01/20/1994WO1994001981A2 Adaptive audio systems and sound reproduction systems
01/18/1994US5280528 Band pass filter circuit for rear channel filtering in a surround processor
12/1993
12/28/1993US5274740 Decoder for variable number of channel presentation of multidimensional sound fields
12/23/1993WO1993026134A1 Stereophonic sound reproduction device using several loudspeakers in each channel
12/23/1993CA2137695A1 Strereophonic sound reproduction device using several loudspeakers in each channel
12/21/1993US5272756 Method and apparatus for determining phase correlation of a stereophonic signal
12/14/1993US5271063 Controls for a vehicle audio/video apparatus
12/09/1993WO1993025015A1 Process for reducing data in the transmission and/or storage of digital signals from several interdependent channels
12/01/1993EP0571638A1 Acoustic equipment and method of displaying operating thereof
11/1993
11/30/1993US5266938 Method for calibrating a display and apparatus for implementing the same method
11/16/1993US5263188 In a vehicle sound system
11/16/1993US5263086 Audio accessory circuit
11/09/1993US5261005 Sound field control device
11/09/1993US5260920 Acoustic space reproduction method, sound recording device and sound recording medium
10/1993
10/30/1993CA2067538A1 Automatic volume control system
10/26/1993US5257313 Surround audio apparatus
10/19/1993US5255326 Interactive audio control system
09/1993
09/30/1993DE4307008A1 Acoustic field corrector using cascaded delay circuits - operates by addn. of outputs of cascaded combinations of echo-generating delay stages and coefft. multipliers
09/29/1993EP0561881A1 Compensating filters
08/1993
08/31/1993US5241605 Tone control apparatus for front and rear channels
08/31/1993US5241604 Sound effect apparatus
08/19/1993DE4204207A1 Deriving mono signal from stereo two channel input - placing microphone in suitable pick-up space between spherical loudspeakers
08/04/1993EP0553832A1 Sound field controller
07/1993
07/06/1993CA1319891C Electro-acoustical system
06/1993
06/30/1993EP0517848A4 Sound mixing device
06/24/1993WO1993012517A1 Acoustic equipment and method of displaying operating thereof
06/24/1993DE4302725A1 Balance regulation circuit for multichannel audio amplifier - adjusts ratio between loudspeaker volumes in dependence on relative position of listener to each loudspeaker
06/22/1993US5222059 Surround-sound system with motion picture soundtrack timbre correction, surround sound channel timbre correction, defined loudspeaker directionality, and reduced comb-filter effects
06/09/1993DE4241130A1 Producing two channel sound field - using successive addition and subtraction of initial front and rear left and right signals to obtain left and right channel signals for headphones
06/02/1993EP0544232A2 Sound collecting system and sound reproducing system
05/1993
05/18/1993US5212733 Sound mixing device
05/12/1993EP0541030A2 Audio reproducing apparatus
05/11/1993US5210796 Stereo/monaural detection apparatus
04/1993
04/14/1993EP0536959A2 Sound editing apparatus
04/06/1993US5201005 Sound field compensating apparatus
03/1993
03/31/1993EP0533757A1 Surround processor
03/10/1993EP0530711A1 Recording medium playing apparatus and compound AV system including such a playing apparatus
02/1993
02/24/1993EP0528475A1 Method and apparatus for adjusting tone in a sound system
02/23/1993US5189703 Timbre correction units for use in sound systems
02/16/1993US5187692 Acoustic transfer function simulating method and simulator using the same
02/03/1993EP0526136A2 System for calibrating sound field
01/1993
01/28/1993DE4224338A1 Compensating sound signals according to auditorium conditions - varying high frequency range according to results of tests on room before playback
01/19/1993US5181249 Three channel audio transmission and/or reproduction systems
01/19/1993US5181248 Acoustic signal reproducing apparatus
01/05/1993CA1312369C Sound reproducer
12/1992
12/23/1992EP0519055A1 Decoder for variable-number of channel presentation of multidimensional sound fields.
12/16/1992EP0517848A1 Sound mixing device
12/15/1992US5172415 Surround processor
12/09/1992EP0517233A1 Music/voice discriminating apparatus
12/02/1992EP0516183A1 Television receiver
12/01/1992CA1310919C Surround-sound system
11/1992
11/17/1992US5165099 Balance control circuit
11/03/1992US5161197 Acoustic analysis
11/03/1992US5161196 Apparatus and method for reducing motion sickness
10/1992
10/28/1992CN1065768A Portable numerical controlled sound adjusting table
10/20/1992CA1309031C Stereo enhancement and directivity servo
10/06/1992US5153362 Electronic musical instrument having pan control function
09/1992
09/30/1992EP0505949A1 Acoustic transfer function simulating method and simulator using the same
09/10/1992DE4106844A1 Car radio system allowing fader control of four loudspeakers - has four-resistor bridge connecting loudspeakers to receiver via capacitors, with centre tap connected to negative terminal of front and positive terminal of rear loudspeakers
09/08/1992US5146507 Audio reproduction characteristics control device
08/1992
08/27/1992DE4204289A1 Digital processing system to improve sound reproduction - provides delay of signals to compensate for reflection effects with signal coefficients set by computer
08/26/1992EP0499729A1 Sound imaging apparatus for a video game system
08/25/1992US5142586 Electro-acoustical system
08/06/1992DE4202609A1 Controlling reproduction sound level for matching to listening chamber - by regulating loudspeaker signal according to difference between generated and detected auditorium test signal
07/1992
07/23/1992WO1992012608A1 Decoder for variable-number of channel presentation of multidimensional sound fields
07/23/1992DE4142472A1 Audio signal balance compensating circuit for stereo transmission - has generator of two comparison signals under response to two compensating signals
07/14/1992US5130816 Method and apparatus for recording and reproducing information including plural channel audio signals
06/1992
06/25/1992WO1992010876A1 Compensating filters
06/23/1992CA1304005C Stereo expansion circuit selection switch
06/09/1992US5121433 Apparatus and method for controlling the magnitude spectrum of acoustically combined signals
06/02/1992CA1302522C Level determining circuit generating output signal at first or second terminal according to level of input signal
06/02/1992CA1302298C Center mode control circuit for sound system
05/1992
05/27/1992EP0487484A1 Improvement to the controls of vehicle audio/video apparatuses
05/27/1992EP0487181A2 Sound field compensating apparatus
05/26/1992CA1301660C Three-dimensional auditory display apparatus and method utilizing enhanced bionic emulation of human binaural sound localization
05/13/1992EP0485222A2 Stereo monaural detection apparatus with differential and add components detection
05/05/1992US5111508 Audio system for vehicular application
04/1992
04/28/1992US5109415 Audio signal processing system performing balance control in both amplitude and phase of audio signal
04/22/1992EP0481821A2 Method and apparatus for determining phase correlation of a stereophonic signal
04/14/1992US5105462 Sound imaging method and apparatus
04/14/1992US5105412 Recording medium playing apparatus for correcting audio signals using an appropriate sound field
04/08/1992EP0479456A2 Automatically configured audio system
03/1992
03/12/1992DE4125893A1 Audio reproduction system for motor vehicle - has multiple loudspeakersoperated to compensate for insufficiencies of acoustics insidevehicle
03/12/1992DE4027338A1 Automatic balance control for stereo system - has sensors to determine position of person and adjusts loudspeaker levels accordingly
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