ROXUL SAFE’N’SOUND? (Thickness, 3” )
The Noise Reduction Coefficient(NRC) at frequencies
125Hz, 250Hz, 500Hz, 1000Hz, 2000Hz, 4000Hz
0.52, 0.96, 1.18, 1.07, 1.05, 1.05,1.05
The Noise Reduction Coefficient (commonly abbreviated NRC) is a scalar representation of the amount of sound energy absorbed upon striking a particular surface.
该吸音材料能有效吸取250Hz以上声音。
The Noise Reduction Coefficient(NRC) at frequencies
125Hz, 250Hz, 500Hz, 1000Hz, 2000Hz, 4000Hz
0.52, 0.96, 1.18, 1.07, 1.05, 1.05,1.05
The Noise Reduction Coefficient (commonly abbreviated NRC) is a scalar representation of the amount of sound energy absorbed upon striking a particular surface.
该吸音材料能有效吸取250Hz以上声音。