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...

G - Physics

10

K

G10K 11/168 (2006.01)

Patent

CA 2441477

The invention concerns a sound attenuation panel comprising 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 invention is characterised in that said 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 invention is particularly applicable to pods for aeroplane jet engines.

L'invention concerne un panneau d'atténuation acoustique comportant une couche résistive a composante structurale renforcée. L'objet de l'invention est un panneau d'atténuation acoustique comportant une couche résistive à composante structurale renforcée, du type comprenant au moins une couche de structure alvéolaire (1) flanquée, d'un côté, d'une couche résistive (2) composée d'au moins une couche poreuse (2b) et d'au moins une couche structurale perforée (2a), et, de l'autre côté d'une couche formant réflecteur total (3), caractérisé en ce que ladite couche structurale (2a) est percée de trous (4) non-circulaires présentant chacun sa plus grande dimension et sa plus petite dimension suivant respectivement deux axes perpendiculaires. Application notamment à des nacelles de turboréacteurs d'aéronefs.

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