Delta UFF 8/15/20 R

Nominal	8/15/20 R
Material	plâtre
Perforation code	UFF 8/15/20 R
Perforation rate percent	9.9
Absorption coefficients hz	LM 20 - 65mm: 125Hz=0.35, 250Hz=0.45, 500Hz=0.55, 1000Hz=0.55, 2000Hz=0.40, 4000Hz=0.45, αw=0.50 \| Sans LM - 65mm: 0.15, 0.30, 0.50, 0.60, 0.45, 0.45, αw=0.50 \| LM 20 - 200mm: 0.45, 0.50, 0.55, 0.50, 0.40, 0.50, αw=0.50 \| Sans LM - 200mm: 0.40, 0.50, 0.55, 0.50, 0.40, 0.45, αw=0.50 \| LM 20 - 400mm: 0.45, 0.50, 0.50, 0.55, 0.45, 0.45, αw=0.50 \| Sans LM - 400mm: 0.45, 0.50, 0.50, 0.50, 0.40, 0.45, αw=0.50

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