Sound absorption element for means of transport, in...

B - Operations – Transporting – 64 – C

Patent

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Details

B64C 1/40 (2006.01) B60R 13/08 (2006.01)

Patent

CA 2618106

The invention relates to a sound-absorbing element (1) for transport means, in particular for aircraft comprising at least one sound-absorbing board (2 to 7) mounted on a base board (8) which is provided with a plurality of openings, in particular, a perforated screen (43) or the similar used for noise transmission. According to said invention, the sound-absorbing boards (2 to 7) are bordered with a frame (9 to 14), at least one frame (9 to 14) comprising a transmission profile (30,47,48) on at least one of certain sections in particular for preventing fatigue fractures generated by differences in stiffness between the frame(s) (9 to 14) and the base board (8). The base board (8) comprises a plurality of openings, in particular the perforated screen (43), thereby making it possible to produce, when combined with the sound-absorbing boards (2 to 7), an air-permeable sound-absorbing element (1).

L'invention concerne un élément d'insonorisation (1) destiné à des véhicules, notamment à des aéronefs, comportant au moins une plaque d'insonorisation (2 à 7) disposée sur une plaque de base (8) présentant une pluralité de cavités, notamment une grille perforée (43) ou similaire destinée à la transmission de bruit. Selon l'invention, les plaques d'insonorisation (2 à 7) sont entourées par un cadre (9 à 14), au moins un cadre (9 à 14) comportant au moins sur certaines sections un profilé de transition (30, 47, 48) notamment destiné à empêcher des ruptures de fatigue dues à des écarts de rigidité entre le ou les cadres (9 à 14) et la plaque de base (8). La plaque de base (8) présentant une pluralité de cavités, notamment une grille perforée (43), et les plaques d'insonorisation (2 à 7) permettent de réaliser un élément d'insonorisation (1) perméable à l'air.

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