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)
12/2003
12/18/2003WO2002041664A3 Automatically adjusting audio system
12/18/2003US20030233158 Apparatus and program for setting signal processing parameter
12/18/2003US20030231776 Setting update apparatus of scene data in audio mixer
12/18/2003CA2488689A1 Acoustical virtual reality engine and advanced techniques for enhancing delivered sound
12/18/2003CA2487958A1 Electronic control circuit and acoustic-signal emitting device for vehicles
12/17/2003EP1372262A2 Method for adjusting filter parameters and associated reproducing apparatus
12/17/2003EP1371261A2 Audio headset
12/17/2003EP1133895B1 Microphone array with high directivity
12/17/2003CN1462566A 扬声器驱动器 Speaker Driver
12/16/2003US6665411 DVE system with instability detection
12/16/2003US6665408 Dynamic bass control circuit with variable cut-off frequency
12/11/2003US20030228025 MEMS directional sensor system
12/11/2003US20030228023 Microphone and Voice Activity Detection (VAD) configurations for use with communication systems
12/11/2003US20030228020 Electronic control circuit and acoustic-signal emitting device for vehicles
12/11/2003US20030228019 Method and system for reducing noise
12/11/2003US20030228014 Multi-section decoding lens
12/10/2003EP1370112A2 System and method for adaptive multi-sensor arrays
12/10/2003EP1368988A2 Improvements in noise cancellation
12/10/2003EP1368936A2 Vehicle audio system
12/10/2003EP1169687B1 A vibrator and a method of controlling a vibrator
12/10/2003CN2591913Y Full digital hearing-aid
12/09/2003US6661900 Digital graphic equalizer control system and method
12/09/2003US6661895 Zero-delay structure for sub-band echo cancellation
12/09/2003US6661161 Piezoelectric biological sound monitor with printed circuit board
12/09/2003US6659392 Visual indication of uninstalled control panel functions
12/09/2003CA2337605C Sound processing apparatus
12/04/2003US20030224732 Wireless microphone information displaying apparatus and method thereof
12/04/2003US20030223612 Low cost hearing protection device
12/04/2003US20030223598 Sound picking device for microphones
12/04/2003US20030223592 Microphone assembly with auxiliary analog input
12/04/2003US20030223590 Assembly for eliminating noise for microphones and method for making the same
12/03/2003EP1367853A1 Assembly for eliminating noise for microphones and method for making the same
12/03/2003EP1367852A1 Sound picking device for microphones
12/03/2003EP1366565A2 Dynamic allocation of power supplied by a power supply and frequency agile spectral filtering of signals
12/03/2003CN2590317Y Microphone whistle eliminator
12/02/2003US6658122 Method for in-situ measuring and in-situ correcting or adjusting a signal process in a hearing aid with a reference signal processor
12/02/2003US6655212 Sound field measuring apparatus and method
11/2003
11/27/2003WO2003098970A1 Programmable auditory prosthesis with trainable automatic adaptation to acoustic conditions
11/27/2003WO2003025617A3 Annunciation of the distance to a target position in a gps landing system
11/27/2003US20030219135 Acoustic drive circuit
11/27/2003DE20313339U1 Speech training device reproducing natural Doppler effect of outer ear, combines working signal with high or band pass filter signal to generate output signal for noise converter
11/27/2003CA2486893A1 Programmable auditory prosthesis with trainable automatic adaptation to acoustic conditions
11/26/2003CN2588715Y Electronic horn for car
11/26/2003CN1459213A Speaker-use protection element and speaker device
11/26/2003CN1458805A Audio frequency effect device
11/26/2003CN1129115C Device for producing harmonic wave in audio signal
11/25/2003US6654468 Apparatus and method for matching the response of microphones in magnitude and phase
11/20/2003WO2003096743A2 Method for designing a modal equalizer for a low frequency audible range especially for closely positioned modes
11/20/2003WO2003096742A1 Method and system of representing a sound field
11/20/2003WO2003075603A3 Digital microphone
11/20/2003WO2003032680A3 Transponder with a changeable circuit configuration
11/20/2003WO2003028006A3 Selective sound enhancement
11/20/2003WO2003015460A3 Sound processing system including wave generator that exhibits arbitrary directivity and gradient response
11/20/2003WO2003015459A3 Sound processing system that exhibits arbitrary gradient response
11/20/2003US20030215103 Parametric virtual speaker and surround-sound system
11/20/2003US20030215098 Acoustic output processing apparatus
11/20/2003CA2484588A1 Method and system of representing a sound field
11/19/2003EP1362497A1 Microphone equipped with a range finder
11/19/2003EP1362342A1 A voice command identifier for a voice recognition system
11/18/2003US6650757 Method and system to detect unwanted noise
11/18/2003US6650756 Method and apparatus for characterizing audio transmitting system, and method and apparatus for setting characteristics of audio filter
11/18/2003US6650755 Voice-to-remaining audio (VRA) interactive center channel downmix
11/13/2003WO2003094572A1 Loudspeaker system
11/13/2003WO2003094570A2 Improvements in and relating to speaker systems
11/13/2003WO2003094369A2 Multi-channel downmixing device
11/13/2003US20030210799 Multiple membrane structure and method of manufacture
11/13/2003US20030210798 Speaker control apparatus and speaker system
11/13/2003US20030210797 Audio feedback processing system
11/12/2003EP1360872A2 Method for automatically adjusting the filter parameters of a digital equalizer and replay device for audio signals for carrying out such a method
11/12/2003CN1456023A System of sound tranceducers with controllable directional properties
11/12/2003CN1455572A Improved sound-echo elimination
11/12/2003CN1127883C Loud-speaker system
11/11/2003US6647368 Sensor pair for detecting changes within a human ear and producing a signal corresponding to thought, movement, biological function and/or speech
11/11/2003US6647120 Loudspeaker protection circuit responsive to temperature of loudspeaker driver mechanism
11/11/2003US6647118 Noise canceling microphone unit for composing noise canceling handset by using normal housing
11/06/2003WO2003091870A1 Apparatus and method for adapting audio signal
11/06/2003US20030208099 Soundbridge test system
11/05/2003EP1359664A1 Electret microphone buffer circuit with significantly enhanced power supply rejection
11/05/2003CN1127201C Capacitorless crossover network for electro-acoustic loudspeakers
11/04/2003US6643378 Bone conduction hearing aid
11/04/2003US6641540 Miniature ultrasound transducer
10/2003
10/30/2003WO2003090062A1 Directional microphone arrangement
10/30/2003WO2003065570A3 Modulator- amplifier
10/30/2003US20030202669 Electret microphone buffer circuit with significantly enhanced power supply rejection
10/30/2003US20030202654 Acoustic echo cancellation
10/30/2003DE19929429C2 Lautsprecherschutzschaltung Speaker protection circuit
10/29/2003EP1356706A2 Second order microphone array
10/29/2003EP1266467B1 Installation with piezoelectric element for equipping a structure and piezoelectric element for same
10/29/2003CN1452851A Multi-channel surround sound mastering and reproduction techniques that preserve spatial harmonics in three dimensions
10/29/2003CN1452850A Dynamic power sharing in multi-channel sound system
10/29/2003CN1452435A Loudspeaker apparatus and switch device thereof
10/28/2003US6639994 Loudspeaker having adjustable motor strength
10/28/2003US6639987 Communication device with active equalization and method therefor
10/28/2003US6639986 Built-in microphone device
10/23/2003WO2003088711A2 Loudspeaker with gps receiver
10/23/2003WO2003088709A1 Microphone assembly with auxiliary analog input
10/23/2003WO2003015458A3 Sound processing system including forward filter that exhibits arbitrary directivity and gradient response in multiple wave sound environment
10/23/2003US20030198357 Sound intelligibility enhancement using a psychoacoustic model and an oversampled filterbank
10/23/2003US20030198356 Apparatus and method for matching the response of microphones in magnitude and phase
10/23/2003US20030198339 Enhanced sound processing system for use with sound radiators
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