Acoustic panel

摘要

An acoustic panel for sound attenuation employs a septumized cellular core sandwiched between a backsheet and a linear acoustic facesheet. The linear acoustic facesheet employs a linear material layer that impedes acoustic waves entering the core substantially linearly over a wide range of frequencies and sound of pressure levels.

主权项

1. An acoustic panel for attenuation of acoustic waves for an aircraft engine intake, comprising:
a core having first and second sides and a plurality of cells extending between the first and second sides; an air-impermeable backsheet on the first side of the core; and a linear acoustic facesheet on the second side of the core, including a layer of linear material that responds substantially the same to the acoustic waves over a range of acoustic wave frequencies and pressure levels; wherein the linear acoustic facesheet includes an outer facesheet layer that is substantially transparent to the acoustic waves.