Composite sound insulation system for room boundary surfaces

Abstract

The composite sound insulation system for room boundary surfaces includes a sound-proofing layer (D) in communication with the corresponding floor, wall, or ceiling covering (V) which preferably has an inner loss factor ηint of at least 0.1, and more particularly of at least 0.2, and a footfall sound-proofing layer (S) adjoining the floor, wall, or ceiling covering (V) or the sound-proofing layer (D) on the side facing away from the room and having a dynamic stiffness (s′) of at most 20 MN/imn3, preferably of at most 10 MN/m3. The floor, wall, or ceiling covering (V) preferably is a paneling having a thickness of at most 40 mm, preferably of at most 20 mm, and more particularly at most 10 mm, which can be made of two parts, in which case (V1, V2)for instance, at least one sound-proofing layer (D) is arranged between the two parts (V1, V2). The footfall sound-proofing layer (S) can be designed as a multiple air blister sheet, where appropriate with at least on intermediate layer, the sound-proofing layer (D) can have a density of >1600 kg/imn3, preferably of >2000 kg/imn3, and/or a weight per unit area of >5 kg/imn2, preferably of >10 kg/m2.

Dependencies are inferred from the claim text.