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SM830082
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1. Specifications
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
0597_C_S
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB
(0dB=0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
NC-70
NC-50
NC-60
NC-40
NC-30
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB
(0dB=0.0002 µbar)
BAND CAENTER FREQUENCIES, Hz
0598_C_S
90
80
70
60
50
40
30
20
10
60 125
250
500
1000 2000 4000
8000
APPROXIMATE
THRESHOLD OF
CONTINUOUS
NOISE
MODEL : CH4242
SOUND LEVEL : 56 dB(A), NC 47
CONDITION : Distance 1m, Height 1m
SOURCE : 230 - 208 V, 1 Phase, 60 Hz
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
0599_C_S
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-50
NC-20
NC-60
NC-40
NC-30
OCTAVE BAND SOUND PRESSURE LEVEL, dB
(0dB=0.0002 µbar)
REMARKS: 1. Value obtained in the actual place where the unit is installed may be slightly higher than the values
shown in this graph because of the conditions of operation, the structure of the building, the background
noise and other factors.
2. The test results were obtained from an anechoic room.
To evaluate “Noise level” the maximum number of the measured OCTAVE BAND SOUND PRESSURE LEVEL is used.
Read the number on each BAND CENTER FREQUENCIES (horizontal axis) ranging from 63 Hz to 8000 Hz and select
the maximum value (vertical axis) among them.
NOTE
1-10 Noise Criterion Curves
● Outdoor Units
MODEL : CH2442
SOUND LEVEL : 53 dB(A), NC 44
CONDITION : Distance 1m, Height 1m
SOURCE : 230 - 208 V, 1 Phase, 60 Hz
MODEL : CH3642
SOUND LEVEL : 56 dB(A), NC 45
CONDITION : Distance 1m, Height 1m
SOURCE : 230 - 208 V, 1 Phase, 60 Hz