Sound attenuating laminate installation for jet aircraft engines
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United States of America Patent
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-
Aug 14, 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 installation of a sound attenuating laminate. More particularly, the invention relates to the installation of 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 laminate. This novel means for conducting the acoustical energy to the intermediary layers of the laminate also allows for an improved anti-icing system, for more efficient jet engine operation, and for more efficient dissipation of acoustic energy.
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