Noise Criteria Curves - Mitsubishi Electric MXZ-2B20NA Service Manual

NOISE CRITERIA CURVE
4
MXZ-2B20NA
MXZ-2B20NA -
1
90
80
70
60
50
40
30
20
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
FAN SPEED FUNCTION SPL(dB ) LINE
(A)
49
High Cooling
High Heating 51
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
4