| 摘要 |
PROBLEM TO BE SOLVED: To provide a noise reduction assembly which can be integrated in the structural body of aircraft components. SOLUTION: This assembly which is 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 permitting 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 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. In the assembly, the core portion may have a honeycomb acoustic structure, and the first member may be bored to permit the passage of acoustic energy into and out of the conduit portion. COPYRIGHT: (C)2005,JPO&NCIPI
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