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