ABSORPTION COEFFICIENTS - acoustic

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ABSORPTION HzMATERIALTHICKNESS125250500100020004000 MASONRY WALLSRough concrete0,020,030,030,030,040,07Smooth unpainted concrete0,010,010,020,020,020,05Smooth concrete, painted or glazed0,010,010,010,020,020,02Porous concrete blocks (no surface finish)0,050,050,050,080,140,2Clinker concrete (no surface finish)0,100,200,400,600,500,60Smooth brickwork with flush pointing0,020,030,030,040,050,07Smooth brickwork with flush pointing, painted0,010,010,020,020,020,02Standard brickwork0,050,040,020,040,050,05Brickwo rk, 10mm flush pointing0,080,090,120,160,220,24Lime cement plaster on masonry wall0,020,020,030,040,050,05Glaze plaster on masonry wall0,010,010,010,020,020,02Painted plaster surface on masonry wall0,020,020,020,020,020,02Plaster on masonry wall with wall paper on backing paper0,020,030,040,050,070,08Ceramic tiles with smooth surface0,010,010,010,020,020,02Breeze block0,200,450,600,400,450,40Plaster on solid wall0,040,050,060,080,040,06Plaster, lime or gypsum on solid backing0,030,030,020,030,040,05STUDWORK AND LIGHTWEIGHT WALLSPlasterboard on battens.

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 ...

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