1
1-79
1-8. Noise Criterion Curves
Wall-Mounted Type
NC-20
NC-30
NC-40
NC-50
4000
63 125 250
8000
2000
1000
500
60
50
40
30
20
10
NC-20
NC-30
NC-40
NC-50
4000
63 125 250
8000
2000
1000
500
60
50
40
30
20
10
NC-20
NC-30
NC-40
NC-50
4000
63 125 250
8000
2000
1000
500
60
50
40
30
20
10
MODEL
SOUND LEVEL
CONDITION
:
AWS36-45
: STRONG
35 dB(A)
MEDIUM
31 dB(A)
WEAK
27 dB(A)
: 1 m in front at height of 1 m
Sound pressure le
vel (dB)
(0dB = 0.0002µbar)
Approximate
minimum
audible limit
for continuous
noise
Overall
Frequency at center of sound pressure band (Hz)
Both 50Hz / 60Hz
Strong
Weak
MODEL
SOUND LEVEL
CONDITION
:
AWS56
: STRONG
38 dB(A)
MEDIUM
34 dB(A)
WEAK
30 dB(A)
: 1 m in front at height of 1 m
Sound pressure le
vel (dB)
(0dB = 0.0002µbar)
Overall
Frequency at center of sound pressure band (Hz)
MODEL
SOUND LEVEL
CONDITION
:
AWS71
: STRONG
41 dB(A)
MEDIUM
37 dB(A)
WEAK
34 dB(A)
: 1 m in front at height of 1 m
Sound pressure le
vel (dB)
(0dB = 0.0002µbar)
Overall
Frequency at center of sound pressure band (Hz)
Approximate
minimum
audible limit
for continuous
noise
Approximate
minimum
audible limit
for continuous
noise
SM830159-06̲Elite̲PAC-i.indb 347
SM830159-06̲Elite̲PAC-i.indb 347
2012/04/27 15:22:41
2012/04/27 15:22:41
