Active noise control system

Acoustics – Sound-modifying means – By wave interference

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C181S207000, C181S208000, C381S071200

Reexamination Certificate

active

07854295

ABSTRACT:
An active noise control apparatus and an active noise control system for reducing noise using an active vibrator, such that edges β of the vibrator (i.e. genesis locations of a bending moment of force caused by the vibrator) agree with positions α on a distribution of the bending moment of force caused by noise vibration of a panel, and such that the edges β of the vibrator are aligned with the positions α on the panel where a sign, of the distribution of the bending moment of force over the panel caused by the noise vibration, reverses. As a result, a control vibration approximate to the noise vibration can be excited. Accordingly, when the vibrator is fixed by agreeing the edges β of the vibrator with the positions α determined by noise frequency desired to be reduced, noise due to a target noise frequency can be effectively reduced.

REFERENCES:
patent: 5315661 (1994-05-01), Gossman et al.
patent: 5485053 (1996-01-01), Baz
patent: 5548653 (1996-08-01), Pla et al.
patent: 5617479 (1997-04-01), Hildebrand et al.
patent: 5692053 (1997-11-01), Fuller et al.
patent: 5724432 (1998-03-01), Bouvet et al.
patent: 5828768 (1998-10-01), Eatwell et al.
patent: 5838092 (1998-11-01), Wang et al.
patent: 6031917 (2000-02-01), Mathur
patent: 6178246 (2001-01-01), Bebesel et al.
patent: 6192133 (2001-02-01), Enamito et al.
patent: 6546316 (2003-04-01), dell'Isola et al.
patent: 6851930 (2005-02-01), Pal
patent: 6985596 (2006-01-01), Bank et al.
patent: 7068794 (2006-06-01), Kim
patent: 7539459 (2009-05-01), Steer
patent: 2004/0057584 (2004-03-01), Kakuhari et al.
patent: 2007/0125592 (2007-06-01), Michell et al.
patent: 2008/0089528 (2008-04-01), Klossowski
patent: 2009/0301805 (2009-12-01), Kakuhari
patent: 05-086658 (1993-04-01), None
patent: 06-012081 (1994-01-01), None
patent: 06-149271 (1994-05-01), None
patent: 2006-215993 (2006-08-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

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

Rate now

     

Profile ID: LFUS-PAI-O-4180884

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.