Multi-splice acoustic liner
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United States of America Patent
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Dec 10, 2013
Grant Date -
Nov 22, 2007
app pub date -
May 19, 2006
filing date -
May 19, 2006
priority date (Note) -
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Abstract
A liner assembly for an aircraft engine housing includes a noise attenuation structure that is covered by a face sheet. The face sheet covering the noise attenuation structure includes a surface having a plurality of circumferentially spaced apart acoustic energy absorption areas that are interspersed between a corresponding plurality of acoustic energy reflective areas. The acoustic energy reflective areas scatter higher order acoustic modes into a plurality of lower order modes. The difficult to attenuate lower order acoustic modes produced by the various acoustic energy cancel each other out to provide significant improvement in liner noise reduction efficiency.
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