1
1-81
1-8. Noise Criterion Curves
Concealed-Duct Type
60
50
40
30
20
10
63
125 250 500 1000 2000 4000 8000
NC-50
NC-40
NC-30
NC-20
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
NC-50
NC-40
NC-30
NC-20
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
NC-50
NC-40
NC-30
NC-20
Both 50Hz / 60Hz
Strong
Weak
MODEL
SOUND LEVEL
CONDITION
SOURCE
:
ADS36
: STRONG 29 dB(A), NC 20 / WEAK 22 dB(A), NC 13
: Under the unit 1.5 m
: 220 - 230 - 240 V, Single Phase, 50 Hz
Sound pressure le
vel (dB)
(0dB = 0.0002µbar)
APPROXIMATE
THRESHOLD
OF HEATING
FOR CONTINU-
OUS NOISE
Frequency at center of sound pressure band (Hz)
MODEL
SOUND LEVEL
CONDITION
SOURCE
:
ADS45-56
SPW-UR184SH56B
SPW-U165 / 185H (N)
SPW-U185SH (T
: STRONG 30 dB(A), NC 23 / WEAK 25 dB(A), NC 17
: Under the unit 1.5 m
: 220 - 230 - 240 V, Single Phase, 50 Hz
Sound pressure le
vel (dB)
(0dB = 0.0002µbar)
Frequency at center of sound pressure band (Hz)
MODEL
SOUND LEVEL
CONDITION
SOURCE
:
ADS71
: STRONG 34 dB(A), NC 22 / WEAK 27 dB(A), NC 18
: Under the unit 1.5 m
: 220 - 230 - 240 V, Single Phase, 50 Hz
Sound pressure le
vel (dB)
(0dB = 0.0002µbar)
Frequency at center of sound pressure band (Hz)
APPROXIMATE
THRESHOLD
OF HEATING
FOR CONTINU-
OUS NOISE
APPROXIMATE
THRESHOLD
OF HEATING
FOR CONTINU-
OUS NOISE
SM830159-06̲Elite̲PAC-i.indb 349
SM830159-06̲Elite̲PAC-i.indb 349
2012/04/27 15:22:43
2012/04/27 15:22:43
