Sound attenuation panel comprising a resistive layer with...

Details Sound attenuation panel comprising a resistive layer with... Sound attenuation panel comprising a resistive layer with...

2002-04-17

2009-02-03

Chapman, Jeanette (Department: 3633)

Acoustics

Sound-modifying means

Sound absorbing panels

C181S290000, C181S291000, C181S293000, C052S781000, C052S793100

Reexamination Certificate

active

07484592

ABSTRACT:
A sound attenuation panel includes a resistive layer with a reinforced structural component, comprising at least a honeycomb structure (1) flanked, on one side, with a resistive layer (2) consisting of at least a porous layer (2b) and of at least a perforated structural layer (2a), and, on the other side, with a layer forming a total reflector (3). The structural layer (2a) is perforated with non-circular holes (4) having each its largest dimension and its smallest dimension along respectively two perpendicular axes. The panel is particularly applicable to pods for aeroplane jet engines.

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