| Patents for H04R 3 - Circuits for transducers (18,190) |
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| 06/24/2004 | US20040120531 Microphones with equal sensitivity |
| 06/23/2004 | EP1430748A2 Method and apparatus for determining a nonlinear response function for a loudspeaker |
| 06/23/2004 | EP1430472A2 Selective sound enhancement |
| 06/23/2004 | CN2621379Y Voice-frequency signal switchover device |
| 06/23/2004 | CN1507701A Parametric virtual speaker and surround-sound system |
| 06/23/2004 | CN1507185A Method and equipment for long-distance controlling audio frequency source |
| 06/23/2004 | CN1155292C Microphone array with high directivity |
| 06/17/2004 | WO2004001552A3 Identification system and method for recognizing any one of a number of different types of devices |
| 06/17/2004 | WO2003009636A3 Directional sound acquisition |
| 06/17/2004 | WO2002089521A3 Microphone-tailored equalizing system |
| 06/17/2004 | US20040114772 Method and system for transmitting and/or receiving audio signals with a desired direction |
| 06/17/2004 | DE10254407A1 Vorrichtung und Verfahren zum Unterdrücken einer Rückkopplung Apparatus and method for suppressing a feedback |
| 06/17/2004 | DE10254404A1 Audiowiedergabesystem und Verfahren zum Wiedergeben eines Audiosignals The audio reproduction system and method for reproducing an audio signal |
| 06/17/2004 | DE10251227A1 Flat-panel loudspeaker for specified frequency range, includes actuating element for excitation of plate-shaped element with flexural waves |
| 06/16/2004 | EP1429315A1 Method and system for suppressing echoes and noises in environments under variable acoustic and highly fedback conditions |
| 06/16/2004 | EP1428411A1 Method and device for controlling the bass reproduction of audio signals in electroacoustic transducers |
| 06/16/2004 | EP1428354A2 Digital audio system |
| 06/16/2004 | EP1428330A2 Telephony control in the flight deck |
| 06/16/2004 | EP1428234A1 Visual indication of uninstalled control panel functions |
| 06/16/2004 | EP1428207A1 Active noise filtering for voice communication systems |
| 06/16/2004 | EP1428036A2 Annunciation of the distance to a target position in a gps landing system |
| 06/16/2004 | EP1427995A2 Station identification for a local area augmentation system on a visual display |
| 06/16/2004 | CN1505439A Improvements in and relating to audio devices |
| 06/15/2004 | US6751333 Inertial vibration transducers |
| 06/15/2004 | US6751323 Electroacoustic apparatus having ringing signal generation means capable of producing a subjective bass perception |
| 06/15/2004 | US6750770 Transponder with a changeable circuit configuration |
| 06/09/2004 | EP1427254A2 Electroacoustical transducing with low frequency aufmenting devices |
| 06/09/2004 | EP1425934A1 Miniature speaker with integrated signal processing electronics |
| 06/09/2004 | CN1504062A Improvements in noise cancellation |
| 06/09/2004 | CN1503598A Improved analogue selector |
| 06/09/2004 | CN1153504C Audio system comprising audio signal processing circuit |
| 06/09/2004 | CN1153503C Microphone and receiver for automatic accompaniment |
| 06/08/2004 | US6748088 Method and device for operating a microphone system, especially in a motor vehicle |
| 06/08/2004 | US6748086 Cabin communication system without acoustic echo cancellation |
| 06/03/2004 | WO2004047490A1 Audio signal processing method and processing device |
| 06/03/2004 | WO2004047485A1 Audio playback system and method for playing back an audio signal |
| 06/03/2004 | WO2004047484A1 Device and method for suppressing a feedback |
| 06/03/2004 | WO2004047482A2 A high intensity directional electroacoustic sound generating system for communications targeting |
| 06/03/2004 | WO2004004297A3 Stationary spectral power dependent audio enhancement system |
| 06/03/2004 | US20040106424 Reproduction apparatus, output apparatus and method for controlling power consumption |
| 06/03/2004 | US20040106398 Method and apparatus for remote control of an audio source such as a wireless microphone system |
| 06/03/2004 | US20040105559 Electroacoustical transducing with low frequency augmenting devices |
| 06/03/2004 | US20040105558 Method for automatically adjusting the filter parameters of a digital equalizer and reproduction device for audio signals for implementing such a method |
| 06/03/2004 | US20040105557 Microphone array system |
| 06/03/2004 | DE10256033A1 Loudspeaker-positioning device for controlling the linear position of a loudspeaker, comprises control input generator for applying set point value to incoming audio signal, to reduce linear and non-linear distortions |
| 06/02/2004 | EP1424873A2 Hearing system |
| 06/02/2004 | EP1424780A2 Delta-sigma modulator, method of switching delta-sigma modulator, and digital amplifier |
| 06/02/2004 | EP1424563A1 Capacitance measuring circuit, capacitance measuring instrument, and microphone device |
| 06/02/2004 | EP1424562A1 Sensor capacity sensing apparatus and sensor capacity sensing method |
| 06/02/2004 | EP1423989A2 Sound processing system including forward filter that exhibits arbitrary directivity and gradient response in single wave sound environment |
| 06/02/2004 | EP1423985A2 Speaker equalization tool |
| 06/02/2004 | CN1152599C Automatic switching switch of loudspeaker |
| 05/27/2004 | WO2003061167B1 Digital linking of multiple microphone systems |
| 05/27/2004 | WO2003007604A3 A method and apparatus for performing real-time storage of ultrasound video image information |
| 05/27/2004 | US20040100275 Apparatus for detecting connection state between stereo earphone plug and corresponding jack of mobile communication terminal |
| 05/26/2004 | EP1422969A2 Method and apparatus for reproducing audio signal |
| 05/26/2004 | EP1421682A2 Audio processing device |
| 05/26/2004 | CN2618400Y Piezoelectric loudspeaker for broadcasting weak client signals stably |
| 05/26/2004 | CN2618394Y Mating noise reduction apparatus and earphone for cabin seat |
| 05/26/2004 | CN1499739A Microphonic processor |
| 05/25/2004 | US6741873 Background noise adaptable speaker phone for use in a mobile communication device |
| 05/25/2004 | US6741708 Acoustic system comprised of components connected by wireless |
| 05/25/2004 | US6740805 Sound system and method for creating a sound event based on a modeled sound field |
| 05/25/2004 | CA2321325C Arrangement for coupling of a driver to a coupling site of the ossicular chain |
| 05/21/2004 | WO2004042880A1 Improvements in and relating to audio devices |
| 05/21/2004 | WO2004012476A3 Electrical impedance based audio compensation in audio devices and methods therefor |
| 05/20/2004 | US20040096111 Block size assignment using local contrast ratio |
| 05/20/2004 | US20040096072 Microphone equipped with a range finder |
| 05/20/2004 | US20040096068 Audio effector circuit |
| 05/20/2004 | US20040096067 Sound reproducing system |
| 05/20/2004 | US20040096066 Sound system and method for creating a sound event based on a modeled sound field |
| 05/20/2004 | US20040096065 Voice-to-remaining audio (VRA) interactive center channel downmix |
| 05/20/2004 | US20040095849 Method for directional location and locating system |
| 05/20/2004 | US20040094018 Karaoke device with built-in microphone and microphone therefor |
| 05/19/2004 | EP1420610A1 Magnetic shielding of loud speaker sensing coil |
| 05/19/2004 | EP1419672A2 Listening device |
| 05/19/2004 | DE10251209A1 Intelligent wireless microphone system, analyses speech signals and carries out appropriate control function on recognizing spoken concepts, words or content |
| 05/19/2004 | DE10249416A1 Verfahren zum Einstellen und zum Betrieb eines Hörhilfegerätes sowie Hörhilfegerät A method for setting and for operating a hearing aid device, as well as hearing aid |
| 05/19/2004 | CN1498514A System and methods for sensing acoustic signal using micro-electronical system technology |
| 05/19/2004 | CN1498034A Microphone with same sensitivity |
| 05/19/2004 | CN1498033A 小型扬声器 Small speakers |
| 05/19/2004 | CN1497880A Reverberation console |
| 05/19/2004 | CN1497430A Mixing method, mixing device and program for excuting the mixing method |
| 05/19/2004 | CN1497426A Interactive voice reproducing |
| 05/19/2004 | CN1150799C High-fidelity and high-efficiency analog amplifier combined with digital amplifier |
| 05/18/2004 | US6738480 Method and device for cancelling stereophonic echo with frequency domain filtering |
| 05/13/2004 | US20040091125 Systems and methods for sensing an acoustic signal using microelectromechanical systems technology |
| 05/13/2004 | US20040091124 Audio devices |
| 05/13/2004 | US20040091099 Anti-howling circuit detecting howling from effect of predicted echo signal |
| 05/12/2004 | EP1418791A2 Improvements in and relating to audio devices |
| 05/12/2004 | EP1417860A2 Method and apparatus for minimizing latency in digital signal processing systems |
| 05/12/2004 | EP1417755A1 Method and apparatus for providing an error characterization estimate of an impulse response derived using least squares |
| 05/12/2004 | EP1417679A1 Sound intelligibility enhancement using a psychoacoustic model and an oversampled filterbank |
| 05/12/2004 | EP1226572A4 Sound system and method for creating a sound event based on a modeled sound field |
| 05/12/2004 | CN2615987Y Digital noise reducing hearing protection micro-earphone |
| 05/12/2004 | CN1496664A Method for at least two audio signals |
| 05/12/2004 | CN1495070A Audio device with multiple selection function and sound signal controller |
| 05/12/2004 | CN1149901C Peak to peak signal detector for audio system |
| 05/12/2004 | CN1149897C Circuit, audio system and method for processing signals and harmonics generator |
| 05/12/2004 | CN1149815C Voice recognition rate increasing method in call initation of voice recognition calling device |