Soundproofing panel, in particular structural or lining...

Acoustics – Sound-modifying means – Sound absorbing panels

Reexamination Certificate

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Details

C181S286000, C181S292000, C181S294000, C181S295000

Reexamination Certificate

active

06851515

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).

REFERENCES:
patent: 4667768 (1987-05-01), Wirt
patent: 5024289 (1991-06-01), Merry
patent: 5225622 (1993-07-01), Gettle et al.
patent: 5777947 (1998-07-01), Ahuja
patent: 5912442 (1999-06-01), Nye et al.
patent: 6085865 (2000-07-01), Delverdier et al.
patent: 4438813 (1996-05-01), None
patent: 2649356 (1991-01-01), None

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