Noise Criteria Curves - Mitsubishi Electric MUH-GA-VB Series Service Manual

4

NOISE CRITERIA CURVES

MSH-GA50VB
FAN SPEED
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15.5:
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250 500
BAND CENTER FREQUENCIES, Hz
MSH-GA80VB
FAN SPEED
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15.5:
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250 500
BAND CENTER FREQUENCIES, Hz
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MSH-GA60VB
SPL(dB(A)) LINE
High
42
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
1000 2000 4000 8000
SPL(dB(A)) LINE
High
47
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
1000 2000 4000 8000
5
FAN SPEED
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15.5:
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250 500
BAND CENTER FREQUENCIES, Hz
INDOOR UNIT
1m
0.8m
MICROPHONE
SPL(dB(A)) LINE
High
45
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
1000 2000 4000 8000
WALL