Sound attenuating laminate for jet aircraft engines

Details Sound attenuating laminate for jet aircraft engines Sound attenuating laminate for jet aircraft engines

1989-04-05

1990-05-22

Fuller, Benjamin R.

Acoustics

Sound-modifying means

Sound absorbing panels

181213, 181214, 181222, 181286, 181293, 181294, 428138, 428246, 428251, 428284, 428285, 428450, 428458, 428466, 428920, 244 1N, E04B 182

Patent

active

049269631

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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Woodall, J., Quieting the JT3D Powered 707, Feb., 1974, Acoustical Publications Inc., pp. 20-25.

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