Technical data

1. Specifications
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I-91
1-8 Noise Criterion Curves
Ceiling Mounted Type
MODEL : ACR 425 H
SOUND LEVEL : HIGH 39 dB(A), NC 34
LOW 34 dB(A), NC 26
CONDITION : Distance 1 m, Under the unit 1 m
SOURCE : 220 - 230 - 240 V, 1 Phase, 50 Hz
60
50
40
30
20
10
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
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
1221_X_I
MODEL : ACR 436 H
SOUND LEVEL : HIGH 42 dB(A), NC 36
LOW 35 dB(A), NC 28
CONDITION : Distance 1 m, Under the unit 1 m
SOURCE : 220 - 230 - 240 V, 1 Phase, 50 Hz
60
50
40
30
20
10
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
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
1222_X_I
NC-20
MODEL : ACR 448 H
SOUND LEVEL : HIGH 44 dB(A), NC 38
LOW 37 dB(A), NC 31
CONDITION : Distance 1 m, Under the unit 1 m
SOURCE : 220 - 230 - 240 V, 1 Phase, 50 Hz
1223_X_I
60
50
40
30
20
10
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
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
NC-20