Active noise control

Details Active noise control Active noise control

1991-04-05

1996-04-23

Peng, John K.

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

381 94, 181210, 181224, H03B 2900

Patent

active

055111270

ABSTRACT:
A system for reducing noise of a noise generator such as a fan located in a housing includes a short duct directing air to the fan housing. An input transducer is located in the duct at a position further removed from the fan than a cancellation noise source which is also located in the duct. An electronic controller with embedded frequencies related to the steady state operation of the fan inputs cancellation signals to the cancellation source. The input transducer also responds to the random noise of the fan to provide control signals to the controller for generating signals for the cancellation source. The input duct can be multi-cellular with respect of the input transducer and the cancellation source.

REFERENCES:
patent: 3936606 (1976-02-01), Wanke
patent: 4044203 (1977-08-01), Swinbanks
patent: 4122303 (1978-10-01), Chaplin et al.
patent: 4480333 (1984-10-01), Ross
patent: 4594695 (1986-06-01), Garconnat et al.
patent: 4665549 (1987-05-01), Eriksson et al.
patent: 4689821 (1987-08-01), Salihuddin et al.
patent: 4783817 (1988-11-01), Hameda et al.
patent: 4805733 (1989-02-01), Kato et al.
patent: 4815139 (1989-03-01), Eriksson et al.
patent: 5010576 (1991-04-01), Hill
patent: 5097923 (1992-03-01), Ziegler et al.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2315524