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)
11/2013
11/20/2013EP2663899A1 Musical dynamics alteration of sounds
11/20/2013EP2490460B1 Acoustic feedback suppression for communication terminals
11/20/2013EP2229006B1 Speaker line inspection device
11/20/2013CN203301719U Multi-microphone speech communication device
11/20/2013CN203301718U Frequency divider with switchable frequency division points and frequency division orders
11/20/2013CN203301717U High fidelity field effect transistor class A power amplifier
11/20/2013CN203301716U Microphone amplifier
11/20/2013CN203301708U Noise reducing earphone with radio set function
11/20/2013CN103404170A Method for driving a condenser microphone
11/20/2013CN103404169A Microphone array steering with image-based source location
11/20/2013CN103402157A Audio-frequency circuit and method for eliminating POP noises
11/20/2013CN103401559A Digital loudspeaker driving device, digital loudspeaker device, digital actuator, planar display device, and mobile electronic apparatus
11/20/2013CN102577433B Volume adjustment based on listener position
11/20/2013CN102340722B Digital-analog hybrid microphone
11/20/2013CN102105234B Output adjusting circuit, ultrasonic vibration device component, and ultrasonic vibration device
11/20/2013CN102075829B Volume adjusting system
11/20/2013CN101800920B Signal processing device, signal processing method and program
11/19/2013US8588438 Driving interface device adaptive to a flat speaker
11/19/2013US8588433 Electret microphone circuit
11/19/2013US8588431 Electrical system for a speaker and its control
11/14/2013WO2013168597A1 Ultrasonic sensor drive circuit
11/14/2013WO2013167884A1 System and method for autonomous multi-track audio processing
11/14/2013WO2013167183A1 Mems microphone assembly and method of operating the mems microphone assembly
11/14/2013WO2013166567A1 Method for the transmission of data between devices over sound waves
11/14/2013WO2013143971A3 Media/communications system
11/14/2013WO2013139445A3 Method for operating a loudspeaker device, loudspeaker device, and device for noise compensation
11/14/2013US20130304475 Switching between acoustic parameters in a convertible vehicle
11/14/2013US20130301865 Wide-range, wide-angle loudspeaker driver
11/14/2013US20130301857 Audio processing apparatus
11/14/2013US20130301851 Audio-optical arrangement, accessory, earpiece unit and audio device
11/14/2013US20130301846 Frequency and direction-dependent ambient sound handling in personal audio devices having adaptive noise cancellation (anc)
11/14/2013US20130301844 Voice Signals Improvements in Compressed Wireless Communications Systems
11/14/2013US20130301841 Audio processing device, audio processing method and program
11/14/2013DE102013104841A1 Method for processing audio signal from loudspeaker used in mobile telephone, involves filtering echo suppression of audio signal based on first received audio signal and echo suppression gain
11/14/2013DE102013006163A1 Störgeräuschbeseitigungsverfahren Störgeräuschbeseitigungsverfahren
11/13/2013EP2661920A1 Systems and methods for tv white space spectrum sensing
11/13/2013EP2661911A1 Transducer with integrated sensor
11/13/2013EP2661905A1 An audio system and method of operation therefor
11/13/2013CN203289634U Anti-interference type loudspeaking circuit
11/13/2013CN203289633U Low noise power amplifier power supply circuit
11/13/2013CN203289632U Wireless sound box with wireless charging
11/13/2013CN203289631U Audio signal processing apparatus
11/13/2013CN203289630U Audio output sharing device
11/13/2013CN203289629U Active integrated loudspeaker based on multiple digital signal processor systems
11/13/2013CN203289628U Active integrated loudspeaker based on multiple digital signal processor
11/13/2013CN203289627U Active loudspeaker based on multiple-DSP system
11/13/2013CN203289626U High-fidelity active integrated loudspeaker having automatic noise-reducing function
11/13/2013CN203289625U Intelligent noise-reducing high-fidelity active integrated loudspeaker box
11/13/2013CN203289624U Active integrated loudspeaker based on multiple DSP processor
11/13/2013CN203289623U Active loudspeaker based on multiple-DSP (digital signal processor) system
11/13/2013CN203289622U Active loudspeaker based on multiple DSP processor
11/13/2013CN1845582B Imaging device, sound record device, and sound record method
11/13/2013CN103392349A Systems, methods, apparatus, and computer-readable media for spatially selective audio augmentation
11/13/2013CN103392348A Acoustic horn gain managing
11/13/2013CN103391497A Multipurpose controllable ringing module
11/13/2013CN103391496A Howling inhibition method and device for ANR (Active Noise Reduction) earphones
11/13/2013CN103391495A Automatic earphone adaptation circuit and adaptation method thereof
11/13/2013CN103391494A Bluetooth headset provided with acceleration sensor
11/13/2013CN103391490A Audio processing device, audio processing method and program
11/13/2013CN102177732B Directivity microphone device
11/07/2013WO2013049738A3 Processing signals
11/07/2013US20130297305 Non-spatial speech detection system and method of using same
11/07/2013US20130294622 Acoustic transducer
11/07/2013US20130294615 Pop-noise removing method
11/07/2013US20130294612 Automatic microphone muting of undesired noises by microphone arrays
11/07/2013DE112009001037B4 Kondensatormikrophonbaugruppe, dc spannungsversorgung undverfahren zur erzeugung einer dc vorspannung Condenser microphone assembly, dc voltage supply undverfahren to the generation of a dc bias
11/06/2013EP2661102A1 Vibration device and electronic apparatus
11/06/2013EP2661101A1 Orientation-responsive acoustic driver operation
11/06/2013EP2661100A1 Electronic apparatus
11/06/2013EP2661099A1 Electroacoustic transducer
11/06/2013EP2661055A1 Mobile telephone
11/06/2013EP2661054A1 Transmitter/receiver unit and receiver unit
11/06/2013EP2660813A1 Dual microphone voice authentication for mobile device
11/06/2013EP2659487A1 A noise suppressing method and a noise suppressor for applying the noise suppressing method
11/06/2013CN203279154U Vehicle-mounted sound equipment circuit operation panel for teaching
11/06/2013CN203279153U D-type audio power amplifier silent charging circuit
11/06/2013CN203279152U Stereo headphone and circuit thereof
11/06/2013CN203279151U Pulse waveform driver and electromagnetic buzzer
11/06/2013CN203279150U Audio power amplifier module supporting hot plug
11/06/2013CN203279149U Array microphone system
11/06/2013CN203279140U Sound equipment
11/06/2013CN203279119U Wireless earphone based on motion sensor
11/06/2013CN203279117U Earphone reused as external antenna and mobile terminal device using same
11/06/2013CN203279022U Audio playing circuit and TV
11/06/2013CN203278752U Dynamic amplitude limiting protector of audio power amplifier
11/06/2013CN103385009A Sound field control device and sound field control method
11/06/2013CN102082983B Crackle suppression circuit
11/06/2013CN102045622B Method and device for switching built-in and external loud speakers
11/06/2013CN101924972B Signal processing apparatus and signal processing method
11/06/2013CN101909224B Portable electronic device
11/06/2013CN101808265B Adaptive feedback gain correction
11/06/2013CN101800921B Sound signal processing apparatus
11/06/2013CN101675669B 麦克风放大器 Microphone Amplifier
11/05/2013US8577055 Sound source signal filtering apparatus based on calculated distance between microphone and sound source
11/05/2013US8577054 Signal processing apparatus, signal processing method, and program
10/2013
10/31/2013WO2013160975A1 Speaker
10/31/2013WO2013160735A1 Noise suppression based on correlation of sound in a microphone array
10/31/2013WO2013159359A1 An echo cancellation device for a 2-wire intercom system and a method thereof
10/31/2013US20130289986 Wearable headset with self-contained vocal feedback and vocal command
10/31/2013US20130287231 System and Method for a Programmable Voltage Source
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