Apparatus and method for the active control of air moving device

Details Apparatus and method for the active control of air moving device Apparatus and method for the active control of air moving device

1994-11-30

1997-06-03

Kuntz, Curtis

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

381 94, 415119, H03B 2900, A61F 1106, H04B 1500

Patent

active

056362870

ABSTRACT:
Method and apparatus for the active cancellation of broad band noise and/or single frequency tones emanating from rotating machinery, such as an air moving device, by detecting related mechanical and acoustic signals therein and causing canceling vibrations to be applied directly to the rotating machinery by a transducer.

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patent: 4837834 (1989-06-01), Allie
patent: 4947434 (1990-08-01), Ito
patent: 5010576 (1991-04-01), Hill
patent: 5117642 (1992-06-01), Nakanishi et al.
patent: 5127235 (1992-07-01), Nakanishi et al.
patent: 5386689 (1995-02-01), Bozich et al.
patent: 5515444 (1996-05-01), Burdisso et al.
patent: 5548653 (1996-08-01), Pla et al.

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