Ultralight trim composite

Details Ultralight trim composite Ultralight trim composite

2008-01-29

2008-01-29

Donovan, Lincoln (Department: 2837)

Acoustics

Sound-modifying means

Sound absorbing panels

C181S289000, C181S284000, C181S285000

Reexamination Certificate

active

07322440

ABSTRACT:
An ultra light, noise reducing composite (1) comprises an acoustically transparent, light weight film (6) between an underlay layer (5) and an air flow resistance layer (4). This composite allows to easily tune the acoustic properties by balancing the absorption and sound transmission behaviour of the composite (1). This air flow resistance layer (4) has an air flow resistance of between 500 Ns/m3 and 10,000 Ns/m3 and an area mass between 200 g/m2 and 3,000 g/m2. The underlay layer (5) has a stiffness value in the range between 100 Pa and 100,000 Pa. The light weight film (6) may consist of a synthetic foil and preferably has a thickness of 0.01 mm.

REFERENCES:
patent: 4130175 (1978-12-01), Hehmann
patent: 5493081 (1996-02-01), Manigold
patent: 5584950 (1996-12-01), Gaffigan
patent: 5824973 (1998-10-01), Haines et al.
patent: 6123171 (2000-09-01), McNett et al.
patent: 6145617 (2000-11-01), Alts
patent: 6631785 (2003-10-01), Khambete et al.
patent: 2005/0016793 (2005-01-01), O'Regan et al.

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