Noise Criteria Curves - Mitsubishi Electric PFFY-P20VKM-E Service Manual

4
NOISE CRITERIA CURVES
PFFY-P20VKM-E
FAN SPEED
High
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
PFFY-P40VKM-E
FAN SPEED
High
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:
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
37
COOLING
HEATING
37
500 1000 2000 4000 8000
FUNCTION SPL(dB(A)) LINE
COOLING 44
HEATING 44
500 1000 2000 4000 8000
PFFY-P25VKM-E
PFFY-P32VKM-E
FAN SPEED
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:
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
NC-70
NC-60
MICROPHONE
1m
NC-50
NC-40
NC-30
NC-20
10
FUNCTION SPL(dB(A))
COOLING 38
High
HEATING 38
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