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I-77
SM831148
1. Specifications
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1-8 Noise Criterion Curves
4-Way Air Discharge Semi-concealed Type
MODEL : XH2672R
SOUND LEVEL : HIGH 38 dB(A), NC 31
LOW 31 dB(A), NC 23
CONDITION : Center, Under the unit 4.9 ft.
SOURCE :
208 - 230 V, 1 Phase, 60 Hz
MODEL : XH4272R
SOUND LEVEL : HIGH 45 dB(A), NC 38
LOW 34 dB(A), NC 27
CONDITION : Center, Under the unit 4.9 ft.
SOURCE :
208 - 230 V, 1 Phase, 60 Hz
MODEL : XH3672R
SOUND LEVEL : HIGH 44 dB(A), NC 37
LOW 33 dB(A), NC 25
CONDITION : Center, Under the unit 4.9 ft.
SOURCE :
208 - 230 V, 1 Phase, 60 Hz
60
50
40
30
20
10
OCTAVE BAND SOUND PRESSURE LEVEL, dB
(0 dB = 0.0002
bar)
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
BAND CENTER FREQUENCIES, Hz
NC-20
NC-40
NC-50
NC-30
2108_X_I
60
50
40
30
20
10
OCTAVE BAND SOUND PRESSURE LEVEL, dB
(0 dB = 0.0002 bar)
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
BAND CENTER FREQUENCIES, Hz
NC-40
NC-50
NC-30
2109_X_
I
NC-20
60
50
40
30
20
10
OCTAVE BAND SOUND PRESSURE LEVEL, dB
(0 dB = 0.0002
bar)
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
BAND CENTER FREQUENCIES, Hz
NC-40
NC-50
NC-30
2110_X_
I
NC-20