Noise attenuating apparatus for modulating air flow
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United States of America Patent
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-
Aug 23, 1983
Grant Date -
N/A
app pub date -
Dec 16, 1980
filing date -
Dec 16, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A distribution duct for conditioned air has elongate outlet slots which are opened and closed by a sound absorbing foam pad controlled by inflatable air bladders. The duct walls adjacent the slots are generally parallel to the face of the pad to create thin air flow channels which effect attenuation of noise when the pad is fully or partially open. When the bladders are fully inflated, they press the pad into the slots and into tight sealing contact with the slot edges.
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