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US 4,947,958 AGranted
Sound attenuating laminate installation for jet aircraft engines
AssigneeUAS Support, Inc.
InventorStephen J. Snyder
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AssigneeUAS Support, Inc.
InventorStephen J. Snyder
Estimating the term…
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.
A method for attenuating sound energy produced by a jet aircraft engine having an anti-icing system comprising wall portions defining passages therebetween through which hot air flows, such method comprising the steps of:
A method for attenuating sound energy produced by a jet aircraft engine having an anti-icing system comprising two sheets of material, at least one of which is corrugated, said two sheets being joined by hollow rivets to form passages therebetween through which the hot air flows, such method comprising the steps of:
Dependencies are inferred from the claim text.