Rigid sandwich panel acoustic treatment
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United States of America Patent
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-
Feb 6, 2001
Grant Date -
N/A
app pub date -
Jan 12, 1999
filing date -
Jan 12, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An acoustic treatment for the air ducts of a gas turbine engine. The acoustic treatment generally includes a facesheet having a plurality of holes therein, a backplate spaced apart from the facesheet, and a plurality of interconnected cells between the facesheet and backplate. Each of the cells is defined by walls attached to the facesheet and the backplate, and at least some of the walls are formed of a porous material so that air is able to flow through the cells in a direction parallel to the facesheet and backplate.
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