ABSORPTION COEFFICIENTS - acoustic
ABSORPTION COEFFICIENTS www.akustik.ua FREQUENCY Hz MATERIAL THICKNESS 125 250 500 1000 2000 4000 MASONRY WALLS Rough concrete 0,02 0,03 0,03 0,03 0,04 0,07 Smooth unpainted concrete 0,01 0,01 0,02 0,02 0,02 0,05
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ABSORPTION COEFFICIENTS - acoustic
www.acoustic.uaFlexible polyurethane foam 50mm 0,25 0,50 0,85 0,95 0,90 Rigid polyurethane foam 50mm 0,20 0,40 0,65 0,55 0,70 12mm expanded polystyrene on 45mm battens 0,05 0,15 0,40 0,35 0,20 25mm expanded polystyrene on 50mm battens 0,100,25 0,55 0,20 0,15 WALL TREATMENTS & CONSTRUCTIONS Cork tiles 25mm on solid backing 0,05 0,10 0,20 0,55 0,60 0,55
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