Noise Criterion Curves - Mitsubishi Electric MXZ-8A140VA Technical & Service Manual

5-3. NOISE CRITERION CURVES

MICROPHONE
1m
1.5m
MXZ-8A140VA
MXZ-8A140VA
1
MXZ-8A140VA
2
MXZ-8A140VA
3
90
80
70
60
50
40
30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
UNIT
GROUND
SPL(dB)
MODE LINE
COOLING
50
HEATING 52
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
30