Noise Criterion Curves - Sanyo C4272R Service Manual

1-8 Noise Criterion Curves

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