Communication machine room wideband noise suppression system

Details Communication machine room wideband noise suppression system Communication machine room wideband noise suppression system

2008-04-22

2011-12-27

Mai, Anh (Department: 2832)

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

From appliance

C381S071100, C381S071140, C381S093000, C381S094100, C381S094900, C379S390040, C379S391000, C379S392000, C379S406010, C379S406050

Reexamination Certificate

active

08085945

ABSTRACT:
In a communication machine room wideband noise suppression system, a sensing unit detects a noise source produced by a fan during the operation thereof and generates a noise input signal and a feedback signal, which are sent to a signal amplifying unit for signal amplification. The amplified signals are then sent to a signal converting unit and converted into digital signals. A multi-channel hybrid controller receives the digital signals and makes corrections and conduct rapid convergence algorithm to derive a reverse digital signal, which is sent to the signal converting unit and converted into a reverse analog signal. The reverse analog signal is sent to the signal amplifying unit for power amplification to generate a control signal for driving a loudspeaker unit to produce interfering acoustic wave, so as to cancel out the noise source and achieve the purpose of eliminating wideband noise.

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