| Patents for H03G 5 - Tone control or bandwidth control in amplifiers (3,156) |
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| 04/13/2004 | US6721547 In-band and out-of-band signal detection for automatic gain calibration systems |
| 04/13/2004 | US6721428 Automatic loudspeaker equalizer |
| 04/08/2004 | US20040068402 Digital audio processor |
| 04/08/2004 | US20040067743 Weak signal processing based on impulse noise blanking |
| 04/06/2004 | US6718295 Speech band division decoder |
| 03/31/2004 | EP1404148A1 Howling control device and howling control method |
| 03/25/2004 | WO2004025830A1 Circuit and method for eliminating pop noise in digital audio amplifier using dual power supply |
| 03/11/2004 | WO2004021332A1 Controlling loudness of speech in signals that contain speech and other types of audio material |
| 03/09/2004 | USRE38455 Controllable integrator |
| 03/09/2004 | US6704421 Automatic multichannel equalization control system for a multimedia computer |
| 03/04/2004 | US20040044525 Controlling loudness of speech in signals that contain speech and other types of audio material |
| 03/04/2004 | US20040043729 Am receiver with audio filtering means |
| 03/04/2004 | US20040042625 Equalization and load correction system and method for audio system |
| 03/04/2004 | US20040042624 Method and apparatus for improving automotive audio system performance |
| 02/25/2004 | EP0571635B1 Frequency characteristic compensation apparatus |
| 02/24/2004 | US6697492 Digital signal processing acoustic speaker system |
| 02/19/2004 | US20040032959 Method of acoustically correct bass boosting and an associated playback system |
| 02/19/2004 | US20040032956 Method and circuit assemblage for influencing the treble reproduction of an audio signal |
| 02/17/2004 | US6694029 Unobtrusive removal of periodic noise |
| 02/12/2004 | US20040028236 Time and frequency windowed pocket cardiac stethoscope |
| 02/05/2004 | WO2004012476A2 Electrical impedance based audio compensation in audio devices and methods therefor |
| 02/05/2004 | WO2003100965A3 High speed amplifier incorporating pre-emphasis |
| 02/05/2004 | WO2003019775A3 Audio processing device |
| 02/05/2004 | WO2003017716A3 Speaker equalization tool |
| 02/05/2004 | US20040023630 Radio transmission apparatus |
| 02/05/2004 | US20040022404 Sound processing apparatus and hearing aid |
| 02/05/2004 | DE10232645A1 Schaltungsanordnung zur Verringerung des Dynamikbereichs von Audiosignalen A circuit arrangement for reducing the dynamic range of audio signals |
| 02/04/2004 | EP1387600A1 Sound processing apparatus and hearing aid |
| 02/04/2004 | EP1387487A2 Method and apparatus for adjusting frequency characteristic of signal |
| 01/29/2004 | WO2004010412A2 Circuit arrangement for reducing the dynamic range of audio signals |
| 01/29/2004 | US20040017921 Electrical impedance based audio compensation in audio devices and methods therefor |
| 01/28/2004 | CN1471228A Electronic volume regulator and measuring method thereof |
| 01/22/2004 | US20040013276 Analog audio signal enhancement system using a noise suppression algorithm |
| 01/15/2004 | US20040007916 Limiting the damaging effects of loud music from audio systems, particularly from automobile audio systems |
| 01/15/2004 | DE19810620B4 Breitbanddämpfungseinrichtung zur frequenzkompensierten Dämpfung von Hochfrequenzsignalen eines Frequenzbandes Wide-band attenuation means for frequency-compensated attenuation of high frequency signals of a frequency band |
| 01/13/2004 | US6678381 Ultra-directional speaker |
| 01/13/2004 | US6678380 Audio system |
| 01/08/2004 | WO2002047260A3 Am receiver with audio filtering means |
| 01/08/2004 | US20040005001 Gain adaptive equalizer |
| 01/07/2004 | EP1379005A2 Method and circuit arrangement for influencing the reproduction of high frequencies of an audio signal |
| 01/07/2004 | CN1134192C Switchover type buffer loop for frequency characteristic |
| 01/06/2004 | US6674864 Adaptive speaker compensation system for a multimedia computer system |
| 01/02/2004 | EP1377123A1 Equalization for audio mixing |
| 12/25/2003 | US20030235317 Equalization for audio mixing |
| 12/24/2003 | CN1463169A Audio multichannel equilizer |
| 12/24/2003 | CN1132416C Method and device for automatic compensating tone |
| 12/16/2003 | US6665408 Dynamic bass control circuit with variable cut-off frequency |
| 12/10/2003 | EP1369994A2 Method for boosting low frequencies adapted to an auditory system and corresponding reproduction system |
| 12/09/2003 | US6661900 Digital graphic equalizer control system and method |
| 12/04/2003 | WO2003100965A2 High speed amplifier incorporating pre-emphasis |
| 12/04/2003 | WO2003009469A3 Filter circuit and method for processing an audio signal |
| 12/04/2003 | US20030223597 Adapative noise compensation for dynamic signal enhancement |
| 12/04/2003 | US20030223596 Audio multi-channel equalizer |
| 12/03/2003 | EP1366564A2 Device for the noise-dependent adjustment of sound volumes |
| 12/02/2003 | US6658122 Method for in-situ measuring and in-situ correcting or adjusting a signal process in a hearing aid with a reference signal processor |
| 11/26/2003 | CN1129115C Device for producing harmonic wave in audio signal |
| 11/20/2003 | WO2003096743A2 Method for designing a modal equalizer for a low frequency audible range especially for closely positioned modes |
| 11/20/2003 | US20030215098 Acoustic output processing apparatus |
| 10/28/2003 | US6639987 Communication device with active equalization and method therefor |
| 10/23/2003 | US20030198352 Reciprocal index lookup for BTSC compatible coefficients |
| 10/22/2003 | CN1451254A Infrabass |
| 10/21/2003 | US6636609 Method and apparatus for automatically compensating sound volume |
| 10/21/2003 | CA2112171C Dsp-based vehicle equalization design system |
| 10/16/2003 | WO2003085547A1 Computer audio system |
| 10/09/2003 | WO2003084103A1 Analog audio enhancement system using a noise suppression algorithm |
| 10/09/2003 | WO2003084059A1 Semiconductor integrated circuit |
| 10/09/2003 | WO2003036406A3 Apparatus and method of controlling signal levels |
| 10/09/2003 | WO2002067418A3 Device for the noise-dependent adjustment of sound volumes |
| 10/08/2003 | CN1447624A Automatic audio system equalization |
| 10/02/2003 | US20030187529 Computer audio system |
| 10/02/2003 | US20030185411 Single channel sound separation |
| 10/01/2003 | EP1349427A2 Automatic audio equalising system |
| 09/25/2003 | US20030179891 Automatic audio system equalizing |
| 09/23/2003 | US6625427 Radio transmission apparatus |
| 09/23/2003 | US6624918 Voltage control of optical receiver bandwidth |
| 09/18/2003 | WO2003077594A1 Howling control device and howling control method |
| 09/18/2003 | CA2447144A1 Howling control device and howling control method |
| 09/10/2003 | EP1342316A1 Playback device for audio signals that are transmitted over potentially disturbed channels |
| 09/04/2003 | US20030165245 Method of implementing a variable number of filter sections for digital signal processing |
| 09/03/2003 | CN1120412C Audio-frequency data processing device |
| 08/20/2003 | CN1118929C Sound quality adjustment circuit |
| 08/14/2003 | WO2003021844A3 Controlled phase-canceling circuits/systems |
| 08/13/2003 | CN1435951A Base band circuit of receiver and low frequency cut-off frequency controlling method |
| 08/12/2003 | US6606388 Method and system for enhancing audio signals |
| 08/05/2003 | US6603825 Automatic gain control for a receiver and method therefor |
| 07/31/2003 | US20030145025 Method of designing families of boost and cut filters, including treble and bass controls and graphic equalizers |
| 07/31/2003 | US20030143968 Automatic gain control method and device |
| 07/31/2003 | US20030142767 Base band circuit of receiver and low cut-off frequency control method |
| 07/30/2003 | CN1433242A High-frequency power amplifier |
| 07/24/2003 | US20030138117 System and method for the automated detection, identification and reduction of multi-channel acoustical feedback |
| 07/22/2003 | US6597898 Automatic gain control method and device |
| 07/08/2003 | US6590984 Sound quality regulation apparatus |
| 07/03/2003 | US20030125910 Method and system for implementing a gaussian white noise generator for real time speech synthesis applications |
| 07/03/2003 | US20030123535 Method and system for determining filter gain and automatic gain control |
| 07/02/2003 | CN2559022Y Functional audio system switcher for multifunctional hall digital cinema |
| 07/02/2003 | CN1113329C Vocal mix circuit |
| 07/01/2003 | US6587012 Automatic slope and gain (ASG) detector technique including a pilot signal |
| 07/01/2003 | US6586994 Variable gain and low noise amplifier for received signals in imaging apparata |
| 06/26/2003 | US20030120484 Method and system for generating colored comfort noise in the absence of silence insertion description packets |
| 06/25/2003 | CN1112761C Apparatus for compensating frequency characteristic of reproduction audio signal |