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Old 10th February 2006   #29
Arka
Gear nut
 
Joined: Mar 2004
Location: Sundsvall, Sweden
Posts: 92

Thumbs up

that stuff looks good... those 90 mm panels would probably make nice corner traps. Know what density it is?

/Arka


Quote:
Originally Posted by Jamstudio
good info

Tnx

Edit :found something

Geluidabsorptie Sonepanel

De geluidabsorptiecoĆ«fficiĆ«nt αs (volgens NEN-ISO 354) van 40, 50 en 90 mm:
Frequentie (Hz) 125--250-500-1000 2000 4000 NRC
40 mm -------- 0,34 0,53 0,86 0,85 0,81 0,89 0,75
50 mm -------- 0,24 0,57 0,88 1,01 0,94 0,90 0,85
90 mm -------- 0,74 1,08 1,09 0,97 0,91 0,94 1,00

NRC: Noise Reduction Coefficient volgens ASTM C423
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