Airborne-sound-absorbing wall or ceiling paneling
AssigneeCarl Freudenberg
InventorsHeinz A. Flocke, Udo Weuster
Life of this patent
Estimating the term…
Loading patent…
AssigneeCarl Freudenberg
InventorsHeinz A. Flocke, Udo Weuster
Estimating the term…
Airborne-sound-absorbing wall or ceiling paneling comprises a perforated plate having a hole-area proportion L and a nonwoven fabric bonded thereto by a discontinuously distributed adhesive layer. The nonwoven fabric has an open-area proportion N and an air flow resistance W.sub.v in the zones free of adhesive, said perforated plate being mountable at a spacing from a wall or ceiling that is large in relation to the thickness of the nonwoven fabric. The paneling has a total air flow resistance W and the adhesive layer is applied to the nonwoven fabric in the form of a fine pattern. The proportion per unit area of the nonwoven fabric which is not covered with adhesive is approximately equal to the ratio of its air flow resistance W.sub.v and the hole-area proportion L divided by the desired total air flow resistance W.
Airborne-sound-absorbing wall or ceiling paneling comprising:
In a method for the production of an airborne-sound-absorbing paneling including bonding a nonwoven fabric with a discontinuously distributed adhesive layer to a perforated plate and mounting same to a wall or ceiling at a distance that is large in relation to the thickness of the nonwoven fabric, the improvement comprising applying the discontinuous adhesive layer to the nonwoven fabric in a form of a fine pattern consisting of substantially circular annular and/or elongated partial layers, providing the nonwoven fabric with a thickness of 0.1 to 0.5 mm, the partial layer with a width of 0.1 to 3 mm and configuring the adhesive and nonwoven fabric so that the proportion per unit area of the nonwoven fabric which is not covered with adhesive is approximately equal to its air flow resistance W.sub.v divided by the hole-area proportion L times the desired total air flow resistance W, and the nonwoven fabric is applied to the perforated plate by activation of the adhesive layer.
Dependencies are inferred from the claim text.