Sound attenuating laminate for jet aircraft engines
AssigneeUAS Support, Inc.
InventorStephen J. Snyder
Life of this patent
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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.
Claims25
A multilayered laminate having improved sound energy attenuating properties comprising:
- a perforated facing layer;
- a moisture barrier layer adjacent to said facing layer;
- a first protecting layer adjacent to said moisture barrier layer;
- a screen layer adjacent to said first protecting layer;
- an acoustic attenuating material layer adjacent to said screen layer;
- a second protecting layer adjacent to said acoustic attenuating material layer;
- and
- a solid backing sheet layer adjacent to said second protecting layer.
A multilayered laminate having improved sound energy attenuating and flame retardant properties comprising:
- a perforated facing layer;
- a moisture barrier layer adjacent to said facing layer;
- a fire resistant layer adjacent to said moisture barrier layer;
- a first protecting layer adjacent to said fire resistant layer;
- a screen layer adjacent to said first protecting layer;
- an acoustic attenuating material layer adjacent to said screen layer;
- a second protecting layer adjacent to said acoustic attenuating material layer;
- and
- a solid backing sheet layer adjacent to said second protecting layer.
Dependencies are inferred from the claim text.