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US 6,851,515 B2Granted
Soundproofing panel, in particular structural or lining panel for a rotorcraft
AssigneesEurocopter, Ateca
InventorsMarc Francis Vincent Dussac, Philippe Vie, Osmin Delverdier
Life of this patent
Estimating the term…
Abstract
The invention concerns a sound-proofing panel, in particular a rotorcraft structural or lining panel: the sound-proofing panel (1) comprises at least two opposite plates (2, 3, 5, 6) forming between them a closed internal space (4), and an aggregate (7) including at least solid elements (8) in contact and which fills entirely said internal space (4).
Claims12
A soundproofing panel, comprising:
- at least two substantially plane opposite plates forming therebetween a closed internal space;
- an aggregate which comprises at least stout bodies in contact and which completely fills said internal space, said stout bodies being able to slip, on the one hand, with respect to one another and, on the other hand, with respect to said plates in such a way as to dissipate part of the vibratory energy circulating around said soundproofing panel, at least some of said stout bodies being directly in contact with one another, and wherein an area for friction between the panel and the aggregate is obtained;
- and
- at least one internal partition which is arranged inside said internal space, substantially parallel to said plates which are substantially parallel to one another, wherein
- said internal partition is at least partially pierced.
2 more elements
A soundproofing panel, comprising:
- at least two opposite plates forming therebetween a closed internal space;
- an aggregate which comprises at least stout bodies in contact and which completely fills said internal space, said stout bodies being able to slip, on the one hand, with respect to one another and, on the other hand, with respect to said plates in such a way as to dissipate part of the vibratory energy circulating around said soundproofing panel;
- and
- at least one honeycomb structure having cells, which is arranged in said internal space, at least some of said stout bodies being directly in contact with one another, a plurality of said stout bodies being disposed in one of said cells, wherein an area for friction between the panel and the aggregate is obtained and vibratory energy dissipation is boosted.
1 more element
Dependencies are inferred from the claim text.