Earmuff with controlled leak
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Nov 30, 2004
Grant Date -
Oct 10, 2002
app pub date -
Apr 9, 2001
filing date -
Apr 9, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An acoustic earmuff device is provided comprising a rigid cup, including inner and outer surfaces, a sound channel means disposed through said cup shaped portion, and a plate means operatively associated with said sound channel means, such that when the plate means is in a first orientation, sound attenuation through the plate means is greater than when the plate means is in a second orientation.
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