Noise Criteria Curves - Mitsubishi Electric MSZ-HC25VA Service Manual

4

NOISE CRITERIA CURVES

MSZ-HC25VA
FAN SPEED
Super High
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
FUNCTION SPL(dB(A)) LINE
43
COOLING
HEATING 43
500 1000 2000 4000 8000
MSZ-HC35VA MSZ-HC35VAB
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
NC-20
CONTINUOUS
NOISE
10
63 125
Test conditions
Cooling : Dry-bulb temperature 27°C Wet-bulb temperature 19°C
Heating : Dry-bulb temperature 20°C
0.8m
MICROPHONE
6
FAN SPEED FUNCTION SPL(dB(A))
COOLING 43
Super High
HEATING 43
250 500 1000 2000
BAND CENTER FREQUENCIES, Hz
INDOOR UNIT
WALL
1m
LINE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
4000 8000