| |
 |
|
Class Information
Number: 381/71.12
Name: Electrical audio signal processing systems and devices > Acoustical noise or sound cancellation > Counterwave generation control path > Algorithm or formula (e.g., lms, filtered-x, etc.)
Description: Subject matter having a specific computational sequence or a mathematical formula used in computation of a counterwave.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7574006 |
Active noise controller |
Aug. 11, 2009 |
| 7536018 |
Active noise cancellation system |
May. 19, 2009 |
| 7529651 |
Accurate linear parameter estimation with noisy inputs |
May. 5, 2009 |
| 7519186 |
Noise reduction systems and methods for voice applications |
Apr. 14, 2009 |
| 7474754 |
Method for canceling unwanted loudspeaker signals |
Jan. 6, 2009 |
| 7343016 |
Linear independence method for noninvasive on-line system identification/secondary path modeling for filtered-X LMS-based active noise control systems |
Mar. 11, 2008 |
| 7340063 |
Feedback cancellation with low frequency input |
Mar. 4, 2008 |
| RE40054 |
Video-assisted audio signal processing system and method |
Feb. 12, 2008 |
| 7315623 |
Method for supressing surrounding noise in a hands-free device and hands-free device |
Jan. 1, 2008 |
| 7310425 |
Multi-channel frequency-domain adaptive filter method and apparatus |
Dec. 18, 2007 |
| 7248703 |
Systems and methods for adaptive noise cancellation |
Jul. 24, 2007 |
| 7197146 |
Microphone array signal enhancement |
Mar. 27, 2007 |
| 7197147 |
Computationally efficient means for optimal control with control constraints |
Mar. 27, 2007 |
| 7127072 |
Method and apparatus for reducing random, continuous non-stationary noise in audio signals |
Oct. 24, 2006 |
| 7120259 |
Adaptive estimation and compensation of clock drift in acoustic echo cancellers |
Oct. 10, 2006 |
| 7106871 |
Feedback cancellation using bandwidth detection |
Sep. 12, 2006 |
| 7106866 |
Active noise cancellation stability solution |
Sep. 12, 2006 |
| 6996241 |
Tuned feedforward LMS filter with feedback control |
Feb. 7, 2006 |
| 6959092 |
Noise reduction panel arrangement and method of calibrating such a panel arrangement |
Oct. 25, 2005 |
| 6891776 |
Vibrator sweep shaping method |
May. 10, 2005 |
| 6847721 |
Active noise control system with on-line secondary path modeling |
Jan. 25, 2005 |
| 6832973 |
System for active noise reduction |
Dec. 21, 2004 |
| 6831983 |
Method for controlling an active control system and system using such method |
Dec. 14, 2004 |
| 6804359 |
Signal processor for reducing undesirable signal content |
Oct. 12, 2004 |
| 6751325 |
Hearing aid and method for processing microphone signals in a hearing aid |
Jun. 15, 2004 |
| 6744886 |
Adaptive filter utilizing proportional affine projection algorithm |
Jun. 1, 2004 |
| 6738481 |
Noise reduction apparatus and method |
May. 18, 2004 |
| 6728380 |
Adaptive noise suppression system and method |
Apr. 27, 2004 |
| 6724899 |
Sound pick-up and reproduction system for reducing an echo resulting from acoustic coupling between a sound pick-up and a sound reproduction device |
Apr. 20, 2004 |
| 6675125 |
Statistics generator system and method |
Jan. 6, 2004 |
| 6668062 |
FFT-based technique for adaptive directionality of dual microphones |
Dec. 23, 2003 |
| 6650756 |
Method and apparatus for characterizing audio transmitting system, and method and apparatus for setting characteristics of audio filter |
Nov. 18, 2003 |
| 6650757 |
Method and system to detect unwanted noise |
Nov. 18, 2003 |
| 6487295 |
Adaptive filtering system and method |
Nov. 26, 2002 |
| 6483532 |
Video-assisted audio signal processing system and method |
Nov. 19, 2002 |
| 6449369 |
Method and device for hybrid active attenuation of vibration, particularly of mechanical, acoustic or similar vibration |
Sep. 10, 2002 |
| 6292571 |
Hearing aid digital filter |
Sep. 18, 2001 |
| 6229898 |
Active vibration control system using on-line system identification with enhanced noise reduction |
May. 8, 2001 |
| 6208739 |
Noise and vibration suppression method and system |
Mar. 27, 2001 |
| 6198829 |
Process and device for focusing acoustic waves |
Mar. 6, 2001 |
| 6154547 |
Adaptive noise reduction filter with continuously variable sliding bandwidth |
Nov. 28, 2000 |
| 6094623 |
Non-linear digital adaptive compensation in non-ideal noise environments |
Jul. 25, 2000 |
| 6055318 |
Adaptive noise reduction filter with low modulation disabling |
Apr. 25, 2000 |
| 6018689 |
Active vibration reducing apparatus and method for identifying transfer function in active vibration reducing apparatus |
Jan. 25, 2000 |
| 6002778 |
Active structural control system and method including active vibration absorbers (AVAS) |
Dec. 14, 1999 |
| 5987144 |
Personal active noise cancellation method and device having invariant impulse response |
Nov. 16, 1999 |
| 5978489 |
Multi-actuator system for active sound and vibration cancellation |
Nov. 2, 1999 |
| 5963651 |
Adaptive acoustic attenuation system having distributed processing and shared state nodal architecture |
Oct. 5, 1999 |
| 5937070 |
Noise cancelling systems |
Aug. 10, 1999 |
| 5912923 |
System for transmitting coded speech signals |
Jun. 15, 1999 |
|
|
|
