Noise Criterion Curves - Mitsubishi Electric PUHZ-HRP71VHA Service Manual

6-3. NOISE CRITERION CURVES

PUHZ-HRP71VHA
PUHZ-HRP100VHA
PUHZ-HRP100YHA
PUHZ-HRP125YHA
90
80
70
60
50
40
30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
OCH425F
SPL(dB)
MODE LINE
COOLING 52
HEATING 53
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
MICROPHONE
1m
1.5m
PUHZ-HRP71VHA2(R1)
PUHZ-HRP100VHA2(R1/R2)
PUHZ-HRP100YHA2(R1)
PUHZ-HRP125YHA2(R1)
90
80
70
60
50
40
30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125
UNIT
GROUND
11
MODE SPL(dB)
COOLING
HEATING
250 500 1000 2000
BAND CENTER FREQUENCIES, Hz
LINE
51
52
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
4000 8000