Active noise controller

Details Active noise controller Active noise controller

2005-11-08

2009-08-11

Pathak, Sudhanshu C (Department: 2611)

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Counterwave generation control path

C381S071110, C381S071400, C700S028000, C704S226000, C375S232000

Reexamination Certificate

active

07574006

ABSTRACT:
An active noise controller can determine the signal transmission characteristics from the power amplifier and the speaker to the microphone without using any special external measuring instrument and calculate a cosine correction value and a sine correction value without using an external computer. The active noise controller uses the cosine correction value and the sine correction value to actively reduce vibrational noise. The measurement mode is selected on touch panel (3), and correction value calculator (22) calculates cosine correction value C0and sine correction value C1by using filter coefficients W0and W1which allow error signal e′(n) to approach zero. Memory (23) stores these values C0and C1.

REFERENCES:
patent: 5170433 (1992-12-01), Elliott et al.
patent: 5377276 (1994-12-01), Terai et al.
patent: 5384853 (1995-01-01), Kinoshita et al.
patent: 5544080 (1996-08-01), Kobayashi et al.
patent: 6094601 (2000-07-01), Popovich
patent: 6216047 (2001-04-01), Goto
patent: 7062049 (2006-06-01), Inoue et al.
patent: 7352869 (2008-04-01), Inoue et al.
patent: 3-204579 (1991-09-01), None
patent: 5-265468 (1993-10-01), None
patent: 6-118969 (1994-04-01), None
patent: 2624858 (1997-04-01), None
patent: 10-32891 (1998-02-01), None
patent: 2000-99037 (2000-04-01), None
patent: 2003-165394 (2003-06-01), None
patent: 2004-20714 (2004-01-01), None
U.S. Appl. No. 12/297,965 Claims; pp. 20-21; Oct. 21, 2008.

Affiliated with

Also associated with

Rating

Active noise controller does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Active noise controller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Active noise controller will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4112794