Noise Criteria Curves - Mitsubishi Electric MCF-GA50VB-E1 Service Manual

4

NOISE CRITERIA CURVES

NOISE CRITERIA CURVES
MCF-GA35VB
FAN SPEED
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250 500
BAND CENTER FREQUENCIES, Hz
MCF-GA60VB
FAN SPEED
High
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250 500
BAND CENTER FREQUENCIES, Hz
SPL(dB ) LINE
(A)
High
44
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
1000 2000 4000 8000
SPL(dB ) LINE
(A)
48
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
1000 2000 4000 8000
MCF-GA50VB
FAN SPEED
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
INDOOR UNIT
MICROPHONE
1m
1m
5
SPL(dB ) LINE
(A)
High
46
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
WALL