| Patents for H04R 3 - Circuits for transducers (18,190) | 
|---|
| 11/14/2012 | CN101502129B Sound collection device | 
| 11/13/2012 | US8311242 Amplifying an audio signal | 
| 11/13/2012 | US8311241 Microphone circuit | 
| 11/13/2012 | US8311236 Noise extraction device using microphone | 
| 11/13/2012 | US8311232 Method for predicting loudspeaker preference | 
| 11/13/2012 | CA2561881C Method and system for reducing audible side effects of dynamic current consumption | 
| 11/13/2012 | CA2559655C Method of detecting audio/video devices within a room | 
| 11/08/2012 | WO2012149945A1 Method for determining an impedance of an electroacoustic transducer and for operating an audio playback device | 
| 11/08/2012 | US20120283999 Loudspeaker array system | 
| 11/08/2012 | US20120281854 Sound emission and collection device | 
| 11/08/2012 | US20120281853 System and method for enhancing speech intelligibility using companion microphones with position sensors | 
| 11/08/2012 | US20120281852 Interactive Sound Reproducing | 
| 11/08/2012 | DE112011100216T5 Dynamische Bassverbesserung auf Kompressionsvorrichtungsbasis mit EQ Dynamic bass enhancement on compression device base with EQ | 
| 11/08/2012 | DE102011050059A1 Device for de-energizing spacers of speaker, has control unit that controls switch according to status of preset spacer | 
| 11/07/2012 | EP2520100A1 Self-powered audio speaker having modular components | 
| 11/07/2012 | EP2519831A1 Method and system for determining the direction between a detection point and an acoustic source | 
| 11/07/2012 | CN202524557U Single-wire programmable MEMS microphone and programming system thereof | 
| 11/07/2012 | CN202524548U Mute circuit, device and system of power amplifier | 
| 11/07/2012 | CN202524547U Convertible sound source output/input module and media player thereof | 
| 11/07/2012 | CN202524545U Voice-recognition-control sound box | 
| 11/07/2012 | CN102771145A Compressor based dynamic bass enhancement with EQ | 
| 11/07/2012 | CN102771141A An apparatus | 
| 11/07/2012 | CN102769813A Microphone chip | 
| 11/07/2012 | CN102769810A Mobile terminal with a calling misoperation preventive function | 
| 11/07/2012 | CN102769729A Television and audio external play control circuit thereof | 
| 11/07/2012 | CN102768558A All-in-one computer having function of muting loudspeaker | 
| 11/07/2012 | CN102165521B Multiple microphone switching and configuration | 
| 11/07/2012 | CN101480064B Sound generating/collecting device | 
| 11/07/2012 | CN101431704B Earphone device | 
| 11/07/2012 | CN101252792B Speaker array apparatus and signal processing method therefor | 
| 11/06/2012 | US8306578 Distributed sound enhancement | 
| 11/06/2012 | US8306244 Digital speaker driving apparatus | 
| 11/06/2012 | US8306237 Head-mounting device to mask ambient sounds for sleeping | 
| 11/06/2012 | US8305494 Broadcast receiving device | 
| 11/01/2012 | WO2012145828A1 Stereo loudspeaker system with asymmetric speaker enclosures | 
| 11/01/2012 | US20120275621 Surface-Mounted Microphone Arrays on Flexible Printed Circuit Boards | 
| 11/01/2012 | US20120275620 Microphone array apparatus and storage medium storing sound signal processing program | 
| 11/01/2012 | US20120275619 Audio signal processing apparatus, audio signal processing method and imaging apparatus | 
| 10/31/2012 | EP2519027A1 Method for controlling music playing and music playing terminal | 
| 10/31/2012 | EP2518724A1 Microphone/headphone audio headset comprising a means for suppressing noise in a speech signal, in particular for a hands-free telephone system | 
| 10/31/2012 | EP2517478A1 An apparatus | 
| 10/31/2012 | DE112009005469T5 Lautsprecherschutzvorrichtung und Verfahren dafür Speaker protection device and method therefor | 
| 10/31/2012 | CN202514058U Flat-panel stereo self-protector | 
| 10/31/2012 | CN202514057U Microphone amplifier | 
| 10/31/2012 | CN202514056U Wireless fidelity (WIFI) audio device | 
| 10/31/2012 | CN202514055U FM wireless sound box | 
| 10/31/2012 | CN202513885U Device of controlling hand-held terminal volume output automatically | 
| 10/31/2012 | CN202513883U High-power amplifier | 
| 10/31/2012 | CN1930909B Filter circuit and reproduction device using the same | 
| 10/31/2012 | CN102763432A Processing of multi-device audio capture | 
| 10/31/2012 | CN102763160A Microphone array subset selection for robust noise reduction | 
| 10/31/2012 | CN102761810A Loudspeaker | 
| 10/31/2012 | CN102761808A Noise cancellation unit | 
| 10/31/2012 | CN102761807A Active noise-cancelling device and noise-cancelling method | 
| 10/31/2012 | CN102761806A Microphone array with wide frequency band and strong directivity | 
| 10/31/2012 | CN102761805A Microphone with strong directivity | 
| 10/31/2012 | CN102761804A Self-adaptive method and self-adaptive device of voice frequency interface, and electronic signature tool | 
| 10/31/2012 | CN102761803A Voice frequency interface self-adaptive device | 
| 10/31/2012 | CN102761802A Three-frequency divider | 
| 10/30/2012 | US8300872 Method and device for detecting a displacement and movement of a sound producing unit of a woofer | 
| 10/30/2012 | US8300850 Read-out circuit with high input impedance | 
| 10/30/2012 | US8300845 Electronic apparatus having microphones with controllable front-side gain and rear-side gain | 
| 10/30/2012 | US8300837 System and method for compensating memoryless non-linear distortion of an audio transducer | 
| 10/25/2012 | US20120269368 Loudspeaker array system | 
| 10/25/2012 | US20120269332 Method for encoding multiple microphone signals into a source-separable audio signal for network transmission and an apparatus for directed source separation | 
| 10/25/2012 | US20120268580 Portable computing device with intelligent robotic functions and method for operating the same | 
| 10/24/2012 | EP2515555A1 Acoustic system | 
| 10/24/2012 | EP2514218A1 Toroid microphone apparatus | 
| 10/24/2012 | CN202503662U MEMS microphone circuit and upper computer circuit | 
| 10/24/2012 | CN202503657U Earphone socket circuit, and portable terminal applying the same | 
| 10/24/2012 | CN202503656U Device used for earphone microphone line sequence changing-over, and mobile terminal thereof | 
| 10/24/2012 | CN202503655U Sound volume control circuit | 
| 10/24/2012 | CN202503654U Electronic horn circuit of automobile | 
| 10/24/2012 | CN202503630U USB speaker playing device | 
| 10/24/2012 | CN1819715B Lound speaker with double-magnetic pole and moving coil, its playing and controlling circuit for cell-phone | 
| 10/24/2012 | CN102752690A Electronic device and earphone | 
| 10/24/2012 | CN102752689A Audio power amplifier output gain control device and control method thereof | 
| 10/24/2012 | CN102752680A Detachable wireless listening device | 
| 10/23/2012 | US8295512 Microphone with voltage pump | 
| 10/23/2012 | US8295510 Power-saving amplifying device | 
| 10/23/2012 | US8295504 Methods and devices for fan control of an electronic device based on loudness data | 
| 10/18/2012 | WO2012140983A1 Digital speaker system | 
| 10/18/2012 | WO2012140435A1 Microphone assembly | 
| 10/18/2012 | US20120263315 Sound signal processing device, method, and program | 
| 10/18/2012 | US20120263312 Rate controller, rate control method, and rate control program | 
| 10/18/2012 | DE102011016946A1 Method for determining frequency of excitation signal of ultrasonic sensor to measure distance between passenger car and vehicle-external object, involves defining frequency of excitation signal based on frequency spectrum of reply signal | 
| 10/18/2012 | CA2774400A1 Electronic device with increased immunity to audio noise from system ground currents | 
| 10/17/2012 | EP2512152A1 Hearing device with two or more microphones | 
| 10/17/2012 | CN202496063U Simple high-sensitivity electronic hearing aid | 
| 10/17/2012 | CN102742300A Control of a loudspeaker output | 
| 10/17/2012 | CN102742299A Microphone unit and voice input device provided therewith | 
| 10/17/2012 | CN102740214A Howling suppression method based on feedback signal spectrum estimation | 
| 10/17/2012 | CN102740212A Hearing device with automatic clipping prevention and corresponding method | 
| 10/17/2012 | CN102740190A Signal processing apparatus, signal processing method, and program | 
| 10/17/2012 | CN102740189A Acoustic feedback inhibition method based on time reversal | 
| 10/17/2012 | CN102740188A Device and method for up-linking audio signal through audio interface | 
| 10/17/2012 | CN102740187A DC voltage error protection circuit, related method and system | 
| 10/17/2012 | CN102740186A Audio interface structure and electronic apparatus using the same | 
| 10/17/2012 | CN102740185A Audio device and earphone plug-pull silencing method thereof | 
| 10/17/2012 | CN102740181A 耳机接口电路及电子设备 Headphone jack circuit and electronic equipment |