Device for absorption of airborne sound

Details Device for absorption of airborne sound Device for absorption of airborne sound

1979-01-16

1981-03-03

Dixon, Jr., William R.

Acoustics

Sound-modifying means

Sound absorbing panels

181291, 428172, 428195, 428315, 428317, 428320, E04B 182, B32B 300, B32B 326

Patent

active

042535433

ABSTRACT:
Device for absorption of airborne sound, comprising a rigid, air permeable and self-supporting carrying layer having a flexible, air impermeable membrane applied thereto. The device is characterized in that the carrying layer has an air flow resistance of less than 10,000 Pas/m, that the layer has a thickness of 1-60 mm, preferably 5-20 mm, and that at least one surface of the layer is provided with a relief pattern. The device is further characterized in that a flexible membrane having a surface weight of less than 2 kg/m.sup.2 is firmly attached to the carrying layer by gluing or the like. The membrane is resting on the upper parts of the relief pattern, whereby an air gap is obtained between the membrane and the lower parts of the relief pattern.

REFERENCES:
patent: 3035657 (1962-05-01), Lemon
patent: 3412513 (1968-11-01), Gosele
patent: 3444956 (1969-05-01), Gaffney
patent: 3476209 (1969-11-01), Cohen
patent: 3972383 (1976-08-01), Green
patent: 4076100 (1978-02-01), Davis
patent: 4097633 (1978-06-01), Focht
patent: 4129672 (1978-12-01), Momurg et al.

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