ACOUSTA-WAL® Noise
Reduction Coefficients
Size
|
Type
|
Surface
|
Frequency¬Hertz
|
NRC
|
125
|
250
|
500
|
1000
|
2000
|
4000
|
4"
|
I
|
Painted
|
.18
|
.82
|
.40
|
.35
|
.43
|
.36
|
.50
|
6"
|
I
|
Painted
|
.63
|
.80
|
.41
|
.40
|
.31
|
.51
|
.50
|
8"
|
IRF
|
Painted
|
.18
|
.82
|
.40
|
.35
|
.43
|
.36
|
.50
|
10"
|
IRF
|
Painted
|
.18
|
.82
|
.40
|
.35
|
.43
|
.36
|
.50
|
12"
|
IRF
|
Painted
|
.63
|
.80
|
.41
|
.40
|
.31
|
.51
|
.50
|
4"
|
IV
|
Painted
|
.21
|
.78
|
.97
|
.80
|
.68
|
.73
|
.80
|
6"
|
IV
|
Painted
|
.31
|
1.23
|
.71
|
.71
|
.65
|
.68
|
.85
|
8"
|
IVRF
|
Painted
|
.21
|
.78
|
.97
|
.80
|
.68
|
.73
|
.80
|
10"
|
IVRF
|
Painted
|
.21
|
.78
|
.97
|
.80
|
.68
|
.73
|
.80
|
12"
|
IVRF
|
Painted
|
.31
|
1.23
|
.71
|
.71
|
.65
|
.68
|
.85
|
|
