초록 ▼

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 Wv in the zones free of ad

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 Wv 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 Wv and the hole-area proportion L divided by the desired total air flow resistance W.

대표청구항 ▼

Airborne-sound-absorbing wall or ceiling paneling comprising: a perforated plate having a hole-area proportion L and a nonwoven fabric bonded thereto by a discontinuously distributed adhesive layer and having an open-area proportion N and an air flow resistance Wv in the zones free of adhesive, said

Airborne-sound-absorbing wall or ceiling paneling comprising: a perforated plate having a hole-area proportion L and a nonwoven fabric bonded thereto by a discontinuously distributed adhesive layer and having an open-area proportion N and an air flow resistance Wv 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 and said paneling having a total air flow resistance W, wherein the adhesive layer is applied to the nonwoven fabric in the form of a fine pattern composed of substantially annular, circular and/or elongated partial layers, wherein the thickness of the nonwoven fabric is from 0.1 to 0.5 mm and the partial layers have a width ranging from 0.1 to 3 mm and that the proportion per unit area of the nonwoven fabric which is not covered with adhesive is approximately equal to its air flow resistance Wv divided by the hole-area proportion L times the desired total air flow resistance W.