| Patents for H04R 3 - Circuits for transducers (18,190) | 
|---|
| 11/18/2009 | CN101583061A Micro speaker with directional transaudient function | 
| 11/18/2009 | CN101583059A Noise-cancelling headphone | 
| 11/18/2009 | CN101582278A Audio processor | 
| 11/18/2009 | CN101582260A Non-amplitude modulation speech coding method and device in electrical cochlea | 
| 11/17/2009 | US7620189 Polarization voltage setting of microphones | 
| 11/17/2009 | US7620060 Method for automatically configuring terminal equipment | 
| 11/17/2009 | CA2509850C Modular loudspeaker | 
| 11/12/2009 | WO2009135815A1 Fast precision charge pump | 
| 11/12/2009 | WO2009117474A3 Systems and methods for detecting wind noise using multiple audio sources | 
| 11/12/2009 | WO2009093866A3 A method and an apparatus for processing an audio signal | 
| 11/12/2009 | US20090279717 Circuit module for a condenser microphone | 
| 11/12/2009 | US20090279716 Vibration generator for electronic device having speaker driver and counterweight | 
| 11/12/2009 | US20090279715 Method, medium, and apparatus for extracting target sound from mixed sound | 
| 11/12/2009 | US20090279714 Apparatus and method for localizing sound source in robot | 
| 11/11/2009 | EP2115912A1 System and method for intelligent equalization | 
| 11/11/2009 | CN101577848A Supper bass boosting method and system | 
| 11/11/2009 | CN101577847A 信号处理设备和信号处理方法 The signal processing apparatus and signal processing method | 
| 11/11/2009 | CN101577531A Voltage limiting device | 
| 11/11/2009 | CN100559471C Multi-mode audio processors and methods of operating the same | 
| 11/11/2009 | CN100559461C Device and method for voice activity detection | 
| 11/10/2009 | US7617099 Noise suppression by two-channel tandem spectrum modification for speech signal in an automobile | 
| 11/10/2009 | US7616768 Vehicle accessory microphone having mechanism for reducing line-induced noise | 
| 11/10/2009 | US7616767 Method and device for determining acoustical transfer impedance | 
| 11/05/2009 | WO2009134127A1 Composite microphone, microphone assembly and method of manufacturing those | 
| 11/05/2009 | WO2009133948A1 Audio processing device and audio processing method | 
| 11/05/2009 | WO2009132646A1 A method of combining at least two audio signals and a microphone system comprising at least two microphones | 
| 11/05/2009 | US20090274324 Microphone unit and method of manufacturing the same | 
| 11/05/2009 | US20090274318 Audio conference device | 
| 11/04/2009 | EP2114085A1 Composite microphone, microphone assembly and method of manufacturing those | 
| 11/04/2009 | EP2113913A1 Method and system for reconstituting low frequencies in an audio signal | 
| 11/04/2009 | CN201341216Y Flame-proof and intrinsic safe type mining sound box | 
| 11/03/2009 | US7613530 Apparatus and program for setting signal processing parameter in an audio mixer | 
| 11/03/2009 | US7613310 Audio input system | 
| 11/03/2009 | US7613309 Interference suppression techniques | 
| 11/02/2009 | CA2664886A1 Enclosure and enclosure system for a speaker of an electronic device | 
| 10/29/2009 | WO2009131772A1 Hearing assistance apparatus | 
| 10/29/2009 | WO2009131658A2 An electrical system for a speaker and its control | 
| 10/29/2009 | WO2009130513A1 Two microphone noise reduction system | 
| 10/29/2009 | WO2009130388A1 Calibrating multiple microphones | 
| 10/29/2009 | WO2009094390A3 Automatic gain control for implanted microphone | 
| 10/29/2009 | US20090269036 Audio output system control method and audio output system | 
| 10/29/2009 | US20090268933 Hearing system with enhanced noise cancelling and method for operating a hearing system | 
| 10/29/2009 | US20090268929 Voice output device and method, program, and room | 
| 10/29/2009 | US20090268926 Semiconductor integrated circuit and condenser microphone | 
| 10/29/2009 | US20090268925 Microphone arrangement | 
| 10/29/2009 | US20090268920 Cardioid beam with a desired null based acoustic devices, systems and methods | 
| 10/29/2009 | US20090268899 Sound pickup apparatus and conference telephone | 
| 10/29/2009 | US20090268881 Calling Party Announcement Apparatus | 
| 10/29/2009 | DE202009009804U1 Headset und Hörer Headset and the handset | 
| 10/29/2009 | CA2645880A1 Wireless transmission-av system of outdoor furniture | 
| 10/28/2009 | EP2111707A1 Sound reproducing system with superimposed digital signal | 
| 10/28/2009 | EP1317871B1 Improved directional microphone system | 
| 10/28/2009 | CN101569210A Audio processing system | 
| 10/28/2009 | CN101569209A Noise extraction device using microphone | 
| 10/28/2009 | CN101568051A Method and device for restoring acoustical signal by using laser | 
| 10/28/2009 | CN101568000A 电视接收机 TV receiver | 
| 10/28/2009 | CN100556219C Device and method for extracting and conveying modulated AC signal information | 
| 10/28/2009 | CN100556203C Audio amplifier local interface system | 
| 10/28/2009 | CN100553557C System and method for reducing auditory perception of noise associated with a medical imaging process | 
| 10/27/2009 | US7609841 Frequency shifter for use in adaptive feedback cancellers for hearing aids | 
| 10/22/2009 | WO2009129008A1 Multi-channel acoustic echo cancellation system and method | 
| 10/22/2009 | WO2009128566A1 Sound pickup apparatus and conference telephone | 
| 10/22/2009 | US20090262956 Microphones with equal sensitivity | 
| 10/22/2009 | DE102008017054A1 Method for reducing distortions in sound reproduction of loudspeaker, involves feeding audio input signal by moving coil, where position of moving coil is continuously measured | 
| 10/21/2009 | CN201332495Y Intelligent power distribution device of sound engineering | 
| 10/21/2009 | CN201332385Y Digital audio power amplifier and audio processing device | 
| 10/21/2009 | CN101563938A A device for and a method of processing audio data | 
| 10/21/2009 | CN100553371C Array type micro-electromechanic capacitor microphone | 
| 10/21/2009 | CN100553312C High-power digital power amplifier integrated system for digital film player | 
| 10/21/2009 | CN100552775C Nondestructive voice quality stereo echo cancelling method | 
| 10/20/2009 | US7606626 Speaking thermometer | 
| 10/20/2009 | US7606376 Automotive audio controller with vibration sensor | 
| 10/15/2009 | WO2009126561A1 Surround sound generation from a microphone array | 
| 10/15/2009 | WO2009126410A2 Integrated latency detection and echo cancellation | 
| 10/15/2009 | WO2009125903A1 A cochlea implant system in ite (in the ear) type using infrared data communication | 
| 10/15/2009 | WO2009125840A1 Audio signal processing device and audio signal processing method | 
| 10/15/2009 | WO2009125567A1 Sound reproducing device using insert-type earphone | 
| 10/15/2009 | WO2009125326A1 Generation of a drive signal for sound transducer | 
| 10/15/2009 | WO2009124618A1 Apparatus for processing an audio signal | 
| 10/15/2009 | WO2009124550A1 An audio system with feedback cancellation | 
| 10/15/2009 | CA2720560A1 A cochlea implant system in ite (in the ear) type using infrared data communication | 
| 10/14/2009 | EP2109328A1 Apparatus for processing an audio signal | 
| 10/14/2009 | EP2108235A1 Circuit arrangement for a sound reproducer with linearized sound transmission | 
| 10/14/2009 | CN201328190Y Clear tunnel broadcasting system | 
| 10/14/2009 | CN201328180Y Silencing device capable of eliminating popcorn noise | 
| 10/14/2009 | CN201328179Y Controller for vibration music-visic device | 
| 10/14/2009 | CN201328172Y Audio play device and terminal | 
| 10/14/2009 | CN101558659A Volume and tone control in direct digital speakers | 
| 10/14/2009 | CN101557060A Audio transiting wire | 
| 10/14/2009 | CN101556466A Method for automatically searching and fixing natural frequency of electric horn of motor vehicle | 
| 10/14/2009 | CN100550602C Method of generating test tone signal and test-tone-signal generating circuit | 
| 10/14/2009 | CN100550131C Method and device for extending the audio signal band | 
| 10/13/2009 | US7602927 Guitar amplifier with channel-dedicated power switching | 
| 10/13/2009 | US7602926 Stationary spectral power dependent audio enhancement system | 
| 10/13/2009 | US7602925 Audio feedback processing system | 
| 10/13/2009 | CA2491546C Integrated acoustic transducer assembly | 
| 10/13/2009 | CA2460406C Sound control system | 
| 10/13/2009 | CA2325244C Cordless telephone with mp3 player capability | 
| 10/08/2009 | WO2009124202A2 Grouping variable media inputs to reflect a user session | 
| 10/08/2009 | WO2009124197A2 Quick record function in a smart pen computing system |