Assembly and method for aircraft engine noise reduction

Details Assembly and method for aircraft engine noise reduction Assembly and method for aircraft engine noise reduction

2006-05-23

2006-05-23

Freay, Charles G. (Department: 3746)

Power plants

Reaction motor

Air passage bypasses combustion chamber

C181S210000, C181S214000

Reexamination Certificate

active

07047725

ABSTRACT:
An assembly useful in reducing aircraft engine noise such as turbofan engine noise comprises: (a) a core portion comprising at least one entrance end and at least one exit end for the passage of acoustic energy therethrough; (b) a first member having an exterior face and an interior face, wherein the first member is adjacent to at least a part of the core portion, and the first member has a plurality of openings therein to permit the passage of acoustic energy therethrough; and (c) a second member having an exterior face and an interior face, wherein the interior face of the second member is adjacent to the core portion. The core portion may be a honeycomb acoustic structure, and the first member may be perforated to permit the passage of acoustic energy into and out of the conduit portion.

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