Noise reduction apparatus

Details Noise reduction apparatus Noise reduction apparatus

2006-10-16

2011-11-15

Mei, Xu (Department: 2614)

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

From appliance

C381S071700

Reexamination Certificate

active

08059827

ABSTRACT:
A passive noise reduction apparatus for altering predetermined sound levels of a sound producing device, the noise reduction apparatus includes at least one piezoelectric foil sensor disposed relative to the sound producing device with the at least one piezoelectric foil sensor being operable to convert such sound wave energy into an electric sound signal and one or more electric circuits in electrical communication with the at least one piezoelectric foil sensor for receiving the electric sound signal and shunting the electric sound signal to a ground connection, thereby reducing sound heard outside the sound producing device.

REFERENCES:
patent: 4166197 (1979-08-01), Moog et al.
patent: 5129003 (1992-07-01), Saruta
patent: 5410607 (1995-04-01), Mason et al.
patent: 6178246 (2001-01-01), Bebesel et al.
patent: 6654467 (2003-11-01), York et al.
patent: 6768799 (2004-07-01), Thomas
patent: 39 16 031 (1989-12-01), None
patent: 39 16 030 (1990-11-01), None
patent: 198 36 483 (2000-02-01), None
National Search Report DE 10 2006 060 032.0.

Affiliated with

Also associated with

Rating

Noise reduction apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4301721