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
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)
PUHZ-HRP100YHA2(R1)
PUHZ-HRP125YHA2(R1)
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
10
SPL(dB)
MODE
LINE
COOLING
51
HEATING
52
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500
1000
2000
4000
8000