Mitsubishi Electric PKFY Series, Technical & Service Manual

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15
OCH715
15
4
NOISE CRITERION CURVES
NOISE CRITERION CURVES
10
20
30
40
50
60
70
80
90
63 125 250 500 1000 2000 4000 8000
Approximate minimum
audible limit on
continuous noise
PKFY-P04NLMU-E
NC-60
NC-50
NC-40
NC-20
NC-30
NC-70
BAND CENTER FREQUENCIES, Hz
OCT
AVE BAND SOUND PRESSURE LEVEL, dB
（
0dB=0.0002μbar)
10
20
30
40
50
60
70
80
90
63 125 250 500 1000 2000 4000 8000
Approximate minimum
audible limit on
continuous noise
PKFY-P06NLMU-E
NC-60
NC-50
NC-40
NC-20
NC-30
NC-70
BAND CENTER FREQUENCIES, Hz
OCT
AVE BAND SOUND PRESSURE LEVEL, dB
（
0dB=0.0002μbar)
10
20
30
40
50
60
70
80
90
63 125 250 500 1000 2000 4000 8000
Approximate minimum
audible limit on
continuous noise
PKFY-P08NLMU-E
NC-60
NC-50
NC-40
NC-20
NC-30
NC-70
BAND CENTER FREQUENCIES, Hz
OCT
AVE BAND SOUND PRESSURE LEVEL, dB
（
0dB=0.0002μbar)
10
20
30
40
50
60
70
80
90
63 125 250 500 1000 2000 4000 8000
Approximate minimum
audible limit on
continuous noise
PKFY-P12NLMU-E
NC-60
NC-50
NC-40
NC-20
NC-30
NC-70
BAND CENTER FREQUENCIES, Hz
OCT
AVE BAND SOUND PRESSURE LEVEL, dB
（
0dB=0.0002μbar)