Noise reduction panel arrangement and method of calibrating...

Details Noise reduction panel arrangement and method of calibrating... Noise reduction panel arrangement and method of calibrating...

2005-10-25

2005-10-25

Tran, Sinh (Department: 2644)

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

C381S071110, C381S071120, C381S094100

Reexamination Certificate

active

06959092

ABSTRACT:
Noise reduction arrangement including: a plurality of actuators (3(n)) for generating secondary noise (ps) to reduce primary noise (pp) and being located in a first surface; a plurality of errors sensors (2(m)) located in a second surface parallel to the first surface for sensing a total amount of noise resulting from the primary noise after being reduced by the secondary noise; a plurality of control elements (5(i)) for controlling the actuators (3(n)) based on the sensor outputs, wherein the distance (d) between the first and second surfaces is such that reduction in power RP of the total amount of noise relative to the primary noise within a predetermined frequency band is within the following range: 0.9×RPmax≦RP≦RPmaxin which RPmaxis the maximum obtainable reduction in power of the total amount of noise relative to the primary noise, both RP and RPmaxbeing expressed in decibel.

REFERENCES:
patent: 4025724 (1977-05-01), Davidson et al.
patent: 4815139 (1989-03-01), Eriksson et al.
patent: 5315661 (1994-05-01), Gossman et al.
patent: 5347586 (1994-09-01), Hill et al.
patent: 5416845 (1995-05-01), Qun
patent: 5526432 (1996-06-01), Denenberg
patent: 5748750 (1998-05-01), L'Esperance et al.
patent: 6192133 (2001-02-01), Enamito et al.
patent: 2 310 512 (1997-08-01), None
J. Guo et al., “Actively Created Quiet Zones by Multiple Control Sources in Free Space”, Journal of the Acoustical Society of America, vol. 101, No. 3, Mar. 1997, pp1492-1501.
J. Elliott Stephen et al., “Interaction between multiple feedforward active control systems”, IEEE Trans Speech Audio Process, vol. 2, No. 4, Oct. 1994, pp521-530.
B. Wang, “Optimal Placement of Microphones and Piezoelectric Transducer Actuators for Far-Field Sound Radiation Control”, Journal of the Acoustical Society of America, vol. 99, No. 5, May 1996, pp2975-2984.

Affiliated with

Also associated with

Rating

Noise reduction panel arrangement and method of calibrating... 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 panel arrangement and method of calibrating..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Noise reduction panel arrangement and method of calibrating... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3480675