Noise Criterion Curves - Mitsubishi Electric PUHZ-P200YKA.UK Service Manual

5-4. NOISE CRITERION CURVES

PUHZ-P200YKA.UK
PUHZ-P200YKAR1.UK
90
80
70
60
50
40
30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
OCH582B
MICROPHONE
1.5m
SPL(dB)
MODE LINE
COOLING 58
HEATING 60
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
1m
UNIT
GROUND
PUHZ-P250YKA.UK
PUHZ-P250YKAR1.UK
90
80
70
60
50
40
30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
10
SPL(dB)
MODE LINE
COOLING 59
HEATING 62
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000