| Patents for H04R 3 - Circuits for transducers (18,190) |
|---|
| 04/01/2009 | CN201216010Y Microphone with echo eliminating function equipped with USB sound card and loudspeaker |
| 04/01/2009 | CN201215976Y Echo eliminator having function of mobile phone |
| 04/01/2009 | CN101401451A Two-wire microphone circuit |
| 04/01/2009 | CN101401450A Sound collection/reproduction method and device |
| 04/01/2009 | CN101400009A 麦克风电路 Microphone circuit |
| 04/01/2009 | CN101400008A Driving circuit for electrostatic loudspeaker and method |
| 04/01/2009 | CN101400007A Active noise eliminating earphone and noise eliminating method thereof |
| 04/01/2009 | CN101399676A Power saving and handling broadcast as unicast traffic in a wlan |
| 04/01/2009 | CN101396012A Fish pole with audio player |
| 04/01/2009 | CN100474939C Sounder signal processor and method |
| 04/01/2009 | CN100474233C Input device |
| 03/31/2009 | US7512246 Stereo sounding method, stereo sounding system, and musical tone generation control system |
| 03/31/2009 | US7512245 Method for detection of own voice activity in a communication device |
| 03/26/2009 | WO2009038182A1 System identifying device and system identifying method |
| 03/26/2009 | WO2009037985A1 Sound emission/collection device |
| 03/26/2009 | US20090080676 Driver circuit and driving method for electrostatic loudspeaker |
| 03/26/2009 | US20090080671 Method and device for controlling a noise producing component |
| 03/25/2009 | EP2040486A2 Method and apparatus for microphone matching for wearable directional hearing device using wearers own voice |
| 03/25/2009 | EP2040485A1 Discharging/collecting voice device and control method for discharging/collecting voice device |
| 03/25/2009 | EP1293104A4 Fft-based technique for adaptive directionality of dual microphones |
| 03/25/2009 | CN201213316Y Circuit module for capacitor type microphone |
| 03/25/2009 | CN201213312Y Processing circuit and device for improving performance of acoustic apparatus |
| 03/25/2009 | CN101394680A Special integrated circuit for multi-channel audio amplification |
| 03/25/2009 | CN101394679A Sound source positioning system and method |
| 03/25/2009 | CN101393429A Automatic control system and automatic control device by utilizing tone |
| 03/25/2009 | CN100472630C Sound system |
| 03/24/2009 | US7509192 In-vehicle mount type AV system and program |
| 03/24/2009 | US7509180 Extending digital rights management and authentication to audio speakers |
| 03/19/2009 | WO2009035491A1 Full range planar magnetic microphone and arrays thereof |
| 03/19/2009 | WO2009034889A1 Local broadcasting system |
| 03/19/2009 | WO2009009568A3 Augmented elliptical microphone array |
| 03/19/2009 | US20090074202 System and method for locating sound sources |
| 03/19/2009 | US20090074201 Method and apparatus for microphone matching for wearable directional hearing device using wearer's own voice |
| 03/18/2009 | EP2037699A1 Echo suppressor |
| 03/18/2009 | EP2036393A1 Device in a headset |
| 03/18/2009 | EP2036077A1 System and method for a sound masking system for networked workstations or offices |
| 03/18/2009 | EP1218716A4 Unitary transducer control system |
| 03/18/2009 | CN201210290Y Audio controller |
| 03/18/2009 | CN101390441A Audio circuit |
| 03/18/2009 | CN101390440A Wearable terminal, mobile imaging sound collecting device, and device, method, and program for implementing them |
| 03/18/2009 | CN101390315A Acoustic signal transmission system, modulation device, demodulation device, and acoustic signal transmission method |
| 03/18/2009 | CA2639574A1 Method and apparatus for a hearing assistance device using mems sensors |
| 03/17/2009 | US7505600 Processor control of an audio transducer |
| 03/12/2009 | WO2009031595A1 Sound collection device |
| 03/12/2009 | WO2009030235A1 Method and device for extension of low frequency output from a loudspeaker |
| 03/12/2009 | WO2008109327A3 Audio system with synthesized positive impedance |
| 03/12/2009 | US20090067643 Method and Apparatus to Reduce the Effect of Flux modulation in Speakers |
| 03/12/2009 | US20090067642 Noise reduction through spatial selectivity and filtering |
| 03/12/2009 | US20090067639 Acoustic apparatus and telephone conversation apparatus |
| 03/12/2009 | DE202009000284U1 Gehörschutzvorrichtung Hearing protection device |
| 03/11/2009 | EP2033489A2 Earguard monitoring system |
| 03/11/2009 | EP2033481A2 A device for and a method of generating audio data for transmission to a plurality of audio reproduction units |
| 03/11/2009 | EP2033480A2 Volume and tone control in direct digital speakers |
| 03/11/2009 | EP1584217B1 Set-up method for array-type sound system |
| 03/11/2009 | CN201207726Y Simple power amplifier having automatically switching function |
| 03/11/2009 | CN201207667Y Earphone embedded mobile phone |
| 03/11/2009 | CN101385387A Digital circuit arrangements for ambient noise-reduction |
| 03/11/2009 | CN101385386A Reverberation removal device, reverberation removal method, reverberation removal program, and recording medium |
| 03/11/2009 | CN101385385A Ambient noise-reduction control system |
| 03/11/2009 | CN101383595A Electronic volume ajuster and audio device using thereof and abnormity detection method |
| 03/11/2009 | CN100469091C Sound outputting apparatus and sound outputting method |
| 03/10/2009 | US7502481 Microphone with ultrasound/audible mixing chamber to secure audio path |
| 03/10/2009 | US7502479 Method for analyzing an acoustical environment and a system to do so |
| 03/10/2009 | CA2408802C Generating separate analog audio programs from a digital link |
| 03/05/2009 | WO2009028349A1 Particular signal erase method, particular signal erase device, adaptive filter coefficient update method, adaptive filter coefficient update device, and computer program |
| 03/05/2009 | WO2009028023A1 Echo suppressing apparatus, echo suppressing system, echo suppressing method, and computer program |
| 03/05/2009 | US20090060222 Sound zoom method, medium, and apparatus |
| 03/05/2009 | US20090060210 Circuit and program for processing multichannel audio signals and apparatus for reproducing same |
| 03/05/2009 | DE102008024520A1 Vorrichtung und Verfahren für asymmetrische Ladungspumpe für einen Audioverstärker Apparatus and method for asymmetric charge pump for an audio amplifier |
| 03/04/2009 | EP2031902A2 Audio-signal processing apparatus and method |
| 03/04/2009 | EP2031901A1 Sound processing apparatus, and method and program for correcting phase difference |
| 03/04/2009 | EP1621043A4 Method and apparatus for sound transduction with minimal interference from background noise and minimal local acoustic radiation |
| 03/04/2009 | CN201204686Y Video signal equipment |
| 03/04/2009 | CN101379872A Hearing aid with self-adapting feedback inhibition system |
| 03/04/2009 | CN101379870A Voice conference device |
| 03/04/2009 | CN101378607A Sound processing apparatus, and method and program for correcting phase difference |
| 03/04/2009 | CN101378602A Display acoustics circuit |
| 03/04/2009 | CN101378601A Drive apparatus for electrostatic loudspeaker |
| 03/04/2009 | CN101378598A Carry-free built-in earphone type horn device for notebook-type computer |
| 03/04/2009 | CN100466752C Converter and method with hybrid RGB chart and YUV video signal |
| 03/04/2009 | CN100466746C Method for information selecting and dividing based on micro block inner edge |
| 03/04/2009 | CN100466740C A method to quantify difference for video code processing and its device |
| 03/04/2009 | CN100466734C Coding image signal |
| 03/04/2009 | CN100466728C Long-distance monitoring business realizing method, system and terminal equipment between video information terminals |
| 03/04/2009 | CN100466722C Method of forming digital film content according to audience's tolerance standard |
| 03/04/2009 | CN100466716C Digital television transmitter and receiver for transmitting and receiving dual stream using 4 level vestigial side band robust data |
| 03/04/2009 | CN100466710C Data conversion system |
| 03/04/2009 | CN100466704C Television apparatus |
| 03/04/2009 | CN100466651C Methods and systems for application instance level workload distribution affinities |
| 03/04/2009 | CN100466643C Digital implementation of multi-channel demodulators |
| 03/04/2009 | CN100466635C Method and apparatus for transmitting message |
| 03/04/2009 | CN100466627C Method and device for searching address prefixion and message transfer method and system |
| 03/04/2009 | CN100466620C Loading balance method based on data flow in large scale paralle processing of mass data |
| 03/04/2009 | CN100466613C Method for processing service |
| 03/04/2009 | CN100466607C Method for improving the service quality in intercommunicate wireless local area network |
| 03/04/2009 | CN100466601C Data read/write device and method |
| 03/04/2009 | CN100466595C Method for processing error indication message |
| 03/04/2009 | CN100466589C Method for realizing virtual special net access |
| 03/04/2009 | CN100466583C Fast ring network method against attack based on RRPP, apparatus and system |
| 03/04/2009 | CN100466577C Method and system for enquiring data of sensor network and sensor node |