Microperforated polymeric film for sound absorption and sound absorber using same
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United States of America Patent
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Sep 9, 2003
Grant Date -
Dec 13, 2001
app pub date -
Jul 24, 1998
filing date -
Jul 24, 1998
priority date (Note) -
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Abstract
Microperforated polymeric films and sound absorbers using such films are provided. The microperforated polymeric films may be relatively thin and flexible and may further include holes having a narrowest diameter less than the film thickness and a widest diameter greater than the narrowest diameter. The microperforated polymeric films of a sound absorber may also have relatively large free span portions, which, in certain embodiments, may vibrate in response to incident sound waves.
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