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NOISE CRITERIA CURVES
OUTDOOR UNIT
MICROPHONE
1m
COOLING
FUNCTION
SPL(dB(A)) LINE
High
FAN SPEED
HEATING
52
55
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : Dry-bulb temperature 35: Wet-bulb temperature 24:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB=20µPa
MUZ-GB50VA
OB455A--1qxq 06.7.31 2:19 PM Page 5