SOUND ABSORBENT

摘要

The invention relates to a sound absorbent, comprising two interconnected non-woven-fibre textiles (1, 2), with thermoplastic or duroplastic bonding, whereby the non-woven-fibre textile (1), facing the acoustic emission source, has a layer thickness in the range of 2 to 15 mm, a density in the range of 50 to 500 kg/m<3>, a specific area weight in the range of 0.1 to 5 kg/m<2> and a flow resistance in the range of 50 to 1000 kNs/m4 and the non-woven-fibre textile (2), facing away from the acoustic emission source, has a layer thickness in the range of 10 to 100 mm, a density on the range of 20 to 100 kg/m<3>, a specific area weight in the range of 0.5 to 1 kg/m<2> and a flow resistance in the range of 10 to 40 kNs/m4 with a total thickness for the sound absorbent in the range of 12 to 30 mm and a total specific area weight for the sound absorbent in the range of 0.5 to 3 kg/m<2>.