| Patents for H03G 5 - Tone control or bandwidth control in amplifiers (3,156) |
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| 04/17/2007 | US7206419 Guitar preamlifier system with controllable distortion |
| 04/12/2007 | WO2006014564A3 Active instrument subwoofer system for low frequency enhancement |
| 04/12/2007 | US20070081677 Speaker array and microphone array |
| 04/11/2007 | CN1945966A Dynamic allocation of power supplied by a power supply and frequency agile spectral filtering of signals |
| 04/10/2007 | US7203325 Audio processing device |
| 04/05/2007 | US20070076905 Audio output apparatus |
| 04/04/2007 | EP1769579A2 Speaker with frequency directed dual drivers |
| 04/03/2007 | US7199657 Amplification gain stages having replica stages for DC bias control |
| 03/29/2007 | US20070071255 Adaptive Sound Reproduction |
| 03/28/2007 | EP1765153A2 A sytem for and method of conveniently and automatically testing the hearing of a person |
| 03/28/2007 | CN1938958A Am reception circuit |
| 03/27/2007 | US7197149 Cellular phone |
| 03/27/2007 | US7196579 Gain-controlled amplifier, receiver circuit and radio communication device |
| 03/22/2007 | WO2007031582A1 Audio dosage control |
| 03/22/2007 | US20070064956 Method and apparatus for extending band of audio signal using higher harmonic wave generator |
| 03/21/2007 | EP1665524A4 Dynamic bass boost apparatus and method |
| 03/20/2007 | US7194096 Method and apparatus for adaptively pre-shaping audio signal to accommodate loudspeaker characteristics |
| 03/13/2007 | US7191025 Variable digital high and low pass filters |
| 03/13/2007 | US7190800 Howling control device and howling control method |
| 03/13/2007 | US7190220 Circuit for providing a base operating voltage for a bipolar transistor and amplifier circuit |
| 03/07/2007 | EP1759457A2 Low-cost hearing testing system and method of collecting user information |
| 03/07/2007 | EP1680781B1 System and method for audio signal processing |
| 03/07/2007 | EP1210765B1 Filter banked gain control of audio in a noisy environment |
| 02/22/2007 | US20070041592 Stream segregation for stereo signals |
| 02/22/2007 | US20070041591 Audio player |
| 02/20/2007 | US7181021 Apparatus for acoustically improving an environment |
| 02/20/2007 | US7180939 Active filter circuit with dynamically modifiable internal gain |
| 02/14/2007 | CN1914809A Audio accessory optimization system |
| 02/14/2007 | CN1913346A Noise sensitive volume control device, audio device and noise sensitive volume control method |
| 02/14/2007 | CN1300935C Method and circuit for control of feedforward distortion compensation amplifier |
| 02/13/2007 | US7177432 Sound processing system with degraded signal optimization |
| 02/08/2007 | WO2007016527A1 Audio tuning system |
| 02/08/2007 | DE10224492B4 Audio-Mehrkanal-Equalizer Multichannel audio equalizer |
| 02/07/2007 | CN1910816A System for audio signal processing |
| 02/01/2007 | US20070025566 System and method for processing audio data |
| 02/01/2007 | US20070025565 Stereo speaker system having acoustic filter for improving low frequency characteristic |
| 02/01/2007 | DE102005035094A1 Audiosignal-Wiedergabevorrichtung Audio signal reproducing device |
| 01/31/2007 | EP1748554A1 Audio Signal Reproducing Device |
| 01/30/2007 | US7171010 Dynamic bass boost apparatus and method |
| 01/30/2007 | US7171009 Method of correcting sound field in an audio system |
| 01/30/2007 | US7171005 P.A. system installation method |
| 01/25/2007 | US20070019826 Reduced latency low frequency equalization system |
| 01/24/2007 | EP0944166B1 Automatic dynamic range controlling circuit |
| 01/24/2007 | EP0890086B1 Digital interconnects of a pc with consumer electronics devices |
| 01/24/2007 | CN1901365A Method for automatic precisely controlling sound producer audio frequency property |
| 01/23/2007 | US7167045 System and method for modifying output power of an information communication system |
| 01/18/2007 | WO2007007523A1 Vehicle-mounted sound control system |
| 01/17/2007 | CN1898988A Audio output apparatus |
| 01/17/2007 | CN1295867C High fidelity audio signal amplifying method |
| 01/16/2007 | CA2334842C Capacitor-less crossover network for electro-acoustic loudspeakers |
| 01/11/2007 | WO2006125843A3 System and method for measuring the frequency response of an enclosure and equalisation method |
| 01/10/2007 | CN1893740A Mixer apparatus and method for changing parameter settings in the mixer apparatus |
| 01/09/2007 | US7162046 Microphone-tailored equalizing system |
| 01/04/2007 | US20070003076 Bandpass woofer enclosure with multiple acoustic filters |
| 01/04/2007 | US20070003075 Level dependent bass management |
| 01/02/2007 | US7157966 Multi-mode power amplifier |
| 12/28/2006 | US20060293773 Process for adjusting the sound volume of a digital sound recording |
| 12/28/2006 | US20060291670 Speaker equalization tool |
| 12/28/2006 | US20060291669 Audio Signal Processing |
| 12/27/2006 | EP1737125A1 Analog device for a filtered time derivation of an incoming signal |
| 12/26/2006 | US7155470 Variable gain integrator |
| 12/14/2006 | US20060282562 Mixer apparatus and parameter-setting changing method for use in the mixer apparatus |
| 12/13/2006 | EP1732254A2 Mixer apparatus and method for changing parameter settings in the mixer apparatus |
| 12/13/2006 | CN1879298A Dynamic bass boost apparatus and method |
| 12/13/2006 | CN1877988A 声音质量调节装置 Sound quality adjustment device |
| 12/12/2006 | US7148750 Gigabit ethernet transceiver with analog front end |
| 12/12/2006 | US7148747 Apparatus for automatically controlling a gain of a power amplifier and associated methods |
| 12/05/2006 | US7146015 Frequency threshold audio activity detector |
| 12/05/2006 | US7146010 Two methods and two devices for processing an input audio stereo signal, and an audio stereo signal reproduction system |
| 12/05/2006 | US7145944 Equalizer containing a plurality of interference correcting equalizer sections |
| 11/30/2006 | WO2005072349A3 Method and apparatus for spatially enhancing the stereo image in sound reproduction and reinforcement systems |
| 11/23/2006 | WO2006123923A1 Method of correction of acoustic parameters of electro-acoustic transducers and device for its realization |
| 11/23/2006 | US20060265093 Process for adjusting the sound volume of a digital sound recording |
| 11/21/2006 | US7139402 Sound reproduction device |
| 11/16/2006 | US20060256979 Array speaker system |
| 11/14/2006 | CA2291863C A linear amplifier arrangement |
| 11/09/2006 | US20060251272 Loudspeaker crossover filter |
| 11/09/2006 | US20060251264 Dip filter frequency characteristic decision method |
| 11/02/2006 | US20060245604 Circuit arrangement for reducing the dynamic range of audio signals |
| 11/01/2006 | CN1856934A Audio pre-amp and mid-band compressor circuit |
| 11/01/2006 | CN1855707A Portable device used sonic signal amplifier and cable for portable device connection |
| 11/01/2006 | CN1855706A Music reproduction device for portable device |
| 10/31/2006 | US7130428 Picked-up-sound recording method and apparatus |
| 10/26/2006 | US20060239474 Gigbox: a music mini-studio |
| 10/26/2006 | US20060239473 Envelope shaping of decorrelated signals |
| 10/26/2006 | US20060239472 Sound quality adjusting apparatus and sound quality adjusting method |
| 10/26/2006 | US20060238256 Gigabit ethernet transceiver with analog front end |
| 10/19/2006 | US20060233392 Digital filter designing method and designing device |
| 10/17/2006 | US7123728 Speaker equalization tool |
| 10/17/2006 | US7123724 Sound system |
| 10/12/2006 | US20060229752 Integrated audio video signal processing system using centralized processing of signals |
| 10/12/2006 | US20060226902 Amplifying a signal using a current shared power amplifier |
| 10/11/2006 | EP1709734A1 System for audio signal processing |
| 10/10/2006 | US7120579 Filter banked gain control of audio in a noisy environment |
| 10/10/2006 | US7119616 Method and apparatus for a fully differential amplifier output stage |
| 10/03/2006 | US7116790 Loudspeaker |
| 10/01/2006 | WO2006107785A1 System and method for extracting and conveying modulated ac signal information |
| 09/28/2006 | US20060215854 Apparatus, method and program for processing acoustic signal, and recording medium in which acoustic signal, processing program is recorded |
| 09/26/2006 | US7113607 Low frequency feedback controlled audio system |
| 09/26/2006 | US7113606 Adjustable harmonic distortion detector and method for using the same |