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)
04/2010
04/22/2010WO2010043998A1 Microphone system and method of operating the same
04/22/2010DE102008042911A1 Conference system for use with subscriber unit, has multiple subscriber units, where one of subscriber units is configured such that it outputs audio signals of other subscriber unit
04/21/2010EP2178309A2 Method and electronic device for driving a capacitance electro-acoustic transducer
04/21/2010CN201440728U Microphone
04/21/2010CN201440726U Capacitive microphone device
04/21/2010CN201440322U Portable voice-control system and voice-control device thereof
04/21/2010CN201440125U Multifunctional medical residue detecting analyzer
04/21/2010CN101188403B Audio amplification device with adjustable power consumption
04/20/2010US7702408 Extending digital rights management and authentication to audio speakers
04/20/2010US7702118 Electret condenser microphone for noise isolation and electrostatic discharge protection
04/20/2010US7702114 High efficiency audio transducer
04/20/2010US7702112 Intelligibility measurement of audio announcement systems
04/15/2010WO2010042835A2 Multidirectional multisound information system
04/15/2010WO2010041394A1 Acoustic reproduction device
04/15/2010WO2010040370A1 System for picking-up a user's voice
04/15/2010WO2010005597A3 Wireless speaker dongle with auxiliary audio output
04/15/2010WO2009056858A3 Sound projector set-up
04/15/2010US20100092007 Dynamic Switching of Microphone Inputs for Identification of a Direction of a Source of Speech Sounds
04/15/2010DE102006029194B4 Vorrichtung und Verfahren zur Schrittweitensteuerung eines adaptiven Filters Apparatus and method for step control of an adaptive filter
04/15/2010CA2740228A1 Multidirectional multisound information system
04/14/2010CN201438761U Capacitance microphone system
04/14/2010CN201438760U Capacitance microphone device
04/14/2010CN201438754U Network audio digital active loudspeaker
04/14/2010CN201438753U Network audio digital amplifier
04/14/2010CN201438750U Vehicle-mounted recreation system based on wireless communication
04/14/2010CN201438749U Circuit for inhibiting switching noise of audio device
04/14/2010CN201438744U Earphone and corresponding main board
04/14/2010CN201438175U Digital pesticide residue tacheometer
04/14/2010CN101189913B Multi-channel sound reproducing apparatus, and multi-channel sound pickup/reproducing apparatus
04/13/2010US7697702 Condenser microphone
04/13/2010US7697701 Environment adaptable loudspeaker
04/13/2010US7697699 Method of and apparatus for reducing noise
04/13/2010US7697695 Stereophonic sound reproducing system and stereophonic sound reproducing apparatus
04/08/2010WO2010039437A1 Multiple microphone switching and configuration
04/08/2010WO2010039193A2 Multi-display handheld device and supporting system
04/08/2010WO2010038973A2 In-the-ear digital hearing aid which can be controlled wirelessly
04/08/2010US20100086124 Compact Beamforming Microphone Assembly
04/08/2010US20100085379 Effect device, av processing device and program
04/08/2010DE102008050688A1 Kommunikationssystem Communication system
04/07/2010EP2172057A1 Sound reproduction system comprising a loudspeaker enclosure with ports, and associated processing circuit
04/07/2010CN201436819U Wireless sound equipment system with a controller
04/07/2010CN101692717A Down-frequency power supply circuit for directly-heated type electron tube filament
04/06/2010US7693294 Method and system for reducing audible side effects of dynamic current consumption
04/06/2010US7693290 Sound reproduction device
04/06/2010US7693289 Method and apparatus for remote control of an audio source such as a wireless microphone system
04/01/2010WO2010036321A2 Self-steering directional hearing aid and method of operation thereof
04/01/2010WO2010035760A1 Loop gain estimating apparatus and howling preventing apparatus
04/01/2010WO2010035658A1 Signal processing method, signal processing device, and signal processing program
04/01/2010WO2010035657A1 Signal processing method, signal processing device, and signal processing program
04/01/2010WO2010035560A1 Output adjusting circuit, ultrasonic vibration device component, and ultrasonic vibration device
04/01/2010WO2010034874A1 Dual-mode loudspeaker
04/01/2010US20100080404 Drive unit manufacturing method and drive unit
04/01/2010US20100080401 Vehicle Audio System Surround Modes
03/2010
03/31/2010EP2168396A2 Augmented elliptical microphone array
03/31/2010EP2168363A1 Acoustic echo reduction in mobile terminals
03/31/2010EP2167008A1 Vibrating footwear device and entertainment system for use therewith
03/31/2010CN201435813Y Audio processing device
03/31/2010CN201435801Y Sound box with power supply from USB interface of computer
03/31/2010CN201430870Y Ultrasonic control circuit for mosquito dispeller
03/31/2010CN101690258A Human body sound transmission system and method using single sound source
03/31/2010CN101690257A Screen, control device and method, program and recording medium
03/31/2010CN101690139A Acoustic echo reduction in mobile terminals
03/31/2010CN101686354A Method for automatically adjusting volume and television
03/31/2010CN101686282A Portable device including earphone circuit and operation method using the same
03/31/2010CN101685961A Power supply circuit of audio frequency power amplifier
03/30/2010US7689406 Method and system for measuring a system's transmission quality
03/30/2010US7689305 System for audio-related device communication
03/30/2010US7688989 Method and system for processing sound signals for a surround left channel and a surround right channel
03/30/2010US7688987 Electret microphone buffer circuit with significantly enhanced power supply rejection
03/30/2010US7688986 Loudspeaker system
03/30/2010US7688985 Automatic microphone matching
03/25/2010WO2010033362A2 Hearing assistance device having reduced mechanical feedback
03/25/2010WO2010032463A1 Sound reproducing apparatus
03/25/2010US20100074458 Structure of mems electroacoustic transducer and fabricating method thereof
03/25/2010DE102009041999A1 Headset und Kopfhörer Headset and Headphones
03/25/2010DE102009039423A1 Schaltbarer Kopfhörer Switchable Headphones
03/24/2010EP2166780A1 Vibration device and acoustic system
03/24/2010CN201430685Y Auxiliary device of magnetoelectric induction hearing aid
03/24/2010CN201430684Y Microphone integrated with noise-decreasing function
03/24/2010CN201430680Y Vehicle-mounted DSP digital power amplifier
03/24/2010CN201430673Y Microphone, digital audio signal receiving device and karaoke system
03/24/2010CN101682811A Sound reproducing device using insert-type earphone
03/24/2010CN101682810A Video conference device
03/24/2010CN101682809A Sound discrimination method and apparatus
03/24/2010CN101682808A Acoustic device
03/24/2010CN101682807A Beamforming system comprising a transducer assembly
03/24/2010CN101682366A Sound signal processor and delay time setting method
03/24/2010CN101681663A A device for and a method of processing audio data
03/24/2010CN101681617A Communication apparatus with ambient noise reduction
03/24/2010CN101677421A Loudspeaker and mobile communication terminal with the loudspeaker
03/23/2010US7684571 System and method of generating an audio signal
03/18/2010WO2009155593A3 Electronic stethoscope system
03/17/2010EP2164183A1 Sound signal processor and delay time setting method
03/17/2010EP1410382B1 Method of noise reduction in a hearing aid and hearing aid implementing such a method
03/17/2010CN201426171Y Low-frequency booster
03/17/2010CN201426170Y Control circuit of loudspeaker capable of earphone-plug-in automatic mute
03/17/2010CN201426169Y Headset transfer device
03/17/2010CN201426161Y 耳机 Headphone
03/17/2010CN201426157Y High-intensity sound signal transmitting device
03/17/2010CN201425707Y Device for improving audio frequency playing efficiency
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