Acoustical ceiling tiles

Details Acoustical ceiling tiles Acoustical ceiling tiles

2005-04-12

2005-04-12

Martin, David (Department: 2837)

Acoustics

Sound-modifying means

Sound absorbing panels

C181S286000, C181S292000, C181S294000, C181S295000, C052S145000

Reexamination Certificate

active

06877585

ABSTRACT:
A system for improved sound absorption, including a substrate of porous insulation material and of a first air flow resistance, and a facing material attached to the substrate and of a second air flow resistance, wherein a total system resistance is a combination of the first and second air flow resistances, and wherein the total system resistance and the second air flow resistance are of relatively low values.

REFERENCES:
patent: 3858676 (1975-01-01), Le Masurier
patent: 5683278 (1997-11-01), Pietsch et al.
patent: 5824973 (1998-10-01), Haines et al.
patent: 6182787 (2001-02-01), Kraft et al.
patent: 2118590 (1983-11-01), None

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