Noise Criterion Curves - Mitsubishi Electric PKFY Series Technical & Service Manual

4

NOISE CRITERION CURVES

NOISE CRITERION CURVES
PKFY-P10VLM-(E/ET)
90
80
70
60
50
40
30
20
Approximate minimum
audible limit on
continuous noise
10
63 125 250 500
BAND CENTER FREQUENCIES, Hz
PKFY-P20VLM-(E/ET/TH)
90
80
70
60
50
40
30
20
Approximate minimum
audible limit on
continuous noise
10
63 125 250 500
BAND CENTER FREQUENCIES, Hz
OCH710
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
1000 2000 4000 8000
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
1000 2000 4000 8000
PKFY-P15VLM-(E/ET/TH)
90
80
70
60
50
40
30
20
Approximate minimum
audible limit on
continuous noise
10
63 125 250 500
BAND CENTER FREQUENCIES, Hz
PKFY-P25VLM-(E/ET/TH)
90
80
70
60
50
40
30
20
Approximate minimum
audible limit on
continuous noise
10
63 125 250 500
BAND CENTER FREQUENCIES, Hz
18
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
1000 2000 4000 8000
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
1000 2000 4000 8000