Method and system for attenuating noise from a cabinet...

Details Method and system for attenuating noise from a cabinet... Method and system for attenuating noise from a cabinet...

2008-04-08

2008-04-08

Donovan, Lincoln (Department: 2837)

Acoustics

Sound-modifying means

By wave interference

C381S071100, C381S071200, C381S071300, C381S071500

Reexamination Certificate

active

10945831

ABSTRACT:
An apparatus for attenuating noise emanating from a cabinet housing noise-generating equipment includes a frame including at least one support member configured to be mountable on the cabinet, proximate the noise-generating equipment, at least one noise attenuation device mounted to each support member proximate the noise-generating equipment, the at least one noise attenuation device comprising a sound input device for receiving a noise signal output from the noise-generating equipment, a processing device for determining characteristics of the noise signal and generating a cancellation signal which is identical to the noise signal but approximately 180 degrees out-of-phase with the noise signal, and a sound output device for outputting the cancellation signal proximate the noise-generating equipment, to attenuate the noise emanating from the cabinet; and a noise absorption member mounted on each support member, the noise absorption members define surfaces that form sides of airflow channels through the apparatus.

REFERENCES:
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patent: 6188770 (2001-02-01), Okada
patent: 6481527 (2002-11-01), French et al.

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