Weighted Sound Absorption Coefficient (αw) – Value - Drapery - ISO 11654 (Annex A & B)
0.55
Weighted Sound Absorption Coefficient (αw) - Class - Drapery - ISO 11654 (Annex A & B)
D
Sound Absorption Average (α) - Drapery - ASTM C423
0.53
Noise Reduction Coefficient (NRC) - Drapery - ASTM C423
0.60