Methods and systems for active sound attenuation in an air handling unit
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United States of America Patent
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Jul 28, 2015
Grant Date -
Oct 20, 2011
app pub date -
Mar 10, 2011
filing date -
Apr 15, 2010
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A system and method for controlling noise produced by an air handling system is provided. The system includes a source microphone to collect sound measurements from the air handling system and a processor to define a cancellation signal that at least partially cancels out the sound measurements. The system also includes a speaker to generate the cancellation signal. The sound measurements are at least partially canceled out within a region of cancellation. Accordingly, the system further includes a response microphone to collect response sound measurements at the region of cancellation. The processor tunes the cancellation signal based on the response sound measurements.
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