Patents
Sitemap › H04 - Electric communication technique › H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; Deaf-aid sets; Public address systems › H04R 3 - Circuits for transducers
Patents for H04R 3 - Circuits for transducers (18,190)
05/2003
05/01/2003US20030079600 Arrangement of a rythmic apparatus with a vehicle sound apparatus, rhythmic accompaniment method and electronic transducer
04/2003
04/30/2003CN1414817A Digital sound mixing apparatus
04/29/2003US6556687 Super-directional loudspeaker using ultrasonic wave
04/29/2003US6556682 Method for cancelling multi-channel acoustic echo and multi-channel acoustic echo canceller
04/29/2003US6555857 Suitable for use to connect electric condenser microphones
04/24/2003WO2003034781A2 Bass frequency amplifying apparatus
04/24/2003WO2003034780A2 Signal processing device for acoustic transducer array
04/24/2003US20030078073 Speaker module connectable to an earphone jack of mobile phone and method for using same
04/23/2003EP1304902A1 Method and device for noise suppression in a redundant acoustic signal
04/23/2003EP1304016A2 A/d converter with integrated biasing for a microphone
04/23/2003EP1013141B1 Method and device for reproducing a stereophonic audiosignal
04/23/2003EP0734621B1 A wireless digital communication system, a radio apparatus and a digital speaker
04/23/2003CN1106748C Apparatus and method for providing telephone user with control of threshold volume at which user's voice will take control
04/23/2003CN1106713C A audio A/D converter using frequency modulation
04/23/2003CN1106209C Electronic gaming device capable of generating pseudo-stereophonic sound
04/17/2003WO2003032683A1 Device for presenting acoustical and vibratory stimuli and method of calibration
04/17/2003WO2003032680A2 Transponder with a changeable circuit configuration
04/17/2003US20030072464 Spectral enhancement using digital frequency warping
04/17/2003US20030072462 Loudspeaker with large displacement motional feedback
04/17/2003US20030072461 Ultra-directional microphones
04/17/2003US20030072460 Directional sound acquisition
04/17/2003US20030070537 Musical tone generation control system, musical tone generation control method, and program for implementing the method
04/16/2003EP1303163A1 Audio reproduction apparatus
04/16/2003EP1303094A2 Noise canceling method and apparatus
04/16/2003CN2545781Y Prime module adapter structure of amplifier
04/16/2003CN1106068C Dual action automatic sound level controller
04/16/2003CA2408340A1 Position sensor for a loudspeaker
04/16/2003CA2408045A1 Loudspeaker with large displacement motional feedback
04/15/2003US6549630 Signal expander with discrimination between close and distant acoustic source
04/15/2003US6549629 DVE system with normalized selection
04/15/2003US6549627 Generating calibration signals for an adaptive beamformer
04/15/2003US6549586 System and method for dual microphone signal noise reduction using spectral subtraction
04/10/2003WO2003030589A2 Sound reproduction systems
04/10/2003WO2003030387A1 Apparatus and method for level-dependent companding for wireless audio noise reduction
04/10/2003WO2003019846A3 Dynamic carrier system for parametric arrays
04/10/2003WO2002041668A3 A method of and apparatus for producing apparent multidimensional sound
04/10/2003US20030068060 Microphone assembly for vehicular installation
04/10/2003US20030067841 Digital signal demodulator calibration system and method for optical hydrophones
04/10/2003US20030067382 Transponder with a changeable circuit configuration
04/09/2003EP1300963A1 Echo processing apparatus
04/09/2003CN1409939A Parametric loudspeaker with improved phase characteristics
04/09/2003CN1409578A Module low voice array
04/09/2003CN1409568A Sound feedback preventive circuit of honeycomb type loudspeaker
04/09/2003CN1409524A Complex circuit safety digital frequency mixing system
04/09/2003CN1408582A Regulation-free contactless electric horn of automobile
04/08/2003US6546099 Arrangement for suppressing an interfering component of an input signal
04/08/2003US6545699 Teleconferencing system, camera controller for a teleconferencing system, and camera control method for a teleconferencing system
04/07/2003WO2001076063A2 Method for processing an input signal for producing an output signal and an application of said method in hearing aids and devices
04/07/2003CA2425180A1 Method for processing an input signal for producing an output signal and an application of said method in hearing aids and devices
04/03/2003WO2003028406A2 Method and apparatus for determining a nonlinear response function for a loudspeaker
04/03/2003WO2003028405A1 Method and device for controlling the bass reproduction of audio signals in electroacoustic transducers
04/03/2003WO2003028006A2 Selective sound enhancement
04/03/2003US20030065513 Voice input and output apparatus
04/03/2003US20030063761 System for distributing a signal between loudspeaker drivers
04/03/2003US20030063758 Microphone arrays for high resolution sound field recording
04/03/2003US20030063024 Apparatus and method for level-dependent companding for wireless audio noise reduction
04/02/2003EP1298960A2 Digital acoustic reproducing apparatus, acoustic apparatus and accoustic reproducing system
04/02/2003EP1298794A2 Pop sound reduction circuit and voice output amplification device
04/02/2003EP1297721A2 Gas flow sensor, speaker system and microphone
04/02/2003EP0972345B1 An audio a/d converter using frequency modulation
04/02/2003EP0929825B1 Two-dimensional array transducer and beamformer
04/01/2003US6540661 Arrangement for coupling of a driver to a coupling site of the ossicular chain
03/2003
03/27/2003WO2003026350A2 Audio distributor
03/27/2003WO2003026343A2 Controller interface for directional sound system
03/27/2003WO2003026242A1 A digital implementation of multi-channel demodulators
03/27/2003WO2003026174A2 Digital audio system
03/27/2003WO2003026162A2 Telephony control in the flight deck
03/27/2003WO2003025962A1 Visual indication of uninstalled control panel functions
03/27/2003WO2003025905A1 Active noise filtering for voice communication systems
03/27/2003WO2003025617A2 Annunciation of the distance to a target position in a gps landing system
03/27/2003WO2003025508A2 Station identification for a local area augmentation system on a visual display
03/27/2003US20030061032 Selective sound enhancement
03/27/2003US20030059072 Audio-cell
03/27/2003US20030059063 Amplifier with limiter
03/27/2003US20030059062 Circuit to prevent acoustic feedback for a cellular speakerphone
03/27/2003US20030059060 Microphone
03/27/2003US20030059056 Method and apparatus for determining a nonlinear response function for a loudspeaker
03/27/2003US20030058040 Pop sound reduction circuit and voice output amplification device
03/26/2003EP1296534A2 Modular bass array
03/26/2003EP1296450A2 Amplifier with limiter
03/26/2003EP1295507A2 Method and apparatus for voice signal extraction
03/26/2003CN1406100A Voice-frequency signal processing
03/20/2003WO2003024152A2 Listening device
03/20/2003WO2003024150A1 Passive and active escapement for sound resonance
03/20/2003WO2003024149A1 Miniature speaker with integrated signal processing electronics
03/20/2003WO2003023418A2 Potential fixing device and potential fixing method
03/20/2003WO2003023417A1 Sensor capacity sensing apparatus and sensor capacity sensing method
03/20/2003WO2001087011A3 Interference suppression techniques
03/20/2003US20030056221 Digital implementation of multi-channel demodulators
03/20/2003US20030055635 Segmented mapping converter system and method
03/20/2003US20030055519 Digital audio system
03/20/2003US20030055518 Digital mixing system with double arrangement for fail safe
03/20/2003US20030055517 Digital acoustic reproducing apparatus, acoustic apparatus and acoustic reproducing system
03/20/2003US20030054817 Telephony control in the flight deck
03/20/2003US20030053648 Modular bass arraying
03/20/2003US20030053647 Feedback cancellation in a hearing aid with reduced sensitivity to low-frequency tonal inputs
03/20/2003US20030053646 Listening device
03/20/2003US20030053637 Audio distributor
03/20/2003US20030053636 Active noise filtering for voice communication systems
03/20/2003US20030052816 Annunciation of the distance to a target position in a global positioning system landing system
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