Sound attenuating laminate for jet aircraft engines
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United States of America Patent
Stats
-
May 22, 1990
Issued Date -
N/A
app pub date -
Apr 5, 1989
filing date -
Oct 6, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a novel sound attenuating laminate. More particularly, the invention relates to a simpler, lighter, and more effective noise attenuating laminate which is made up of seven layers of material. The laminate includes a duct liner, a moisture barrier, a first protecting layer, a screen, acoustic attenuating material, a second protecting layer, and a solid backing sheet. The laminate is readily incorporated into various sections of a jet engine compartment in order to attenuate the sound produced by the jet engine. Hollow rivets are used to conduct acoustical energy to the intermediary layers of the noise attenuating laminate.
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