Noise Criterion Curves - Mitsubishi Electric PLA-RP·AA Service Manual

NOISE CRITERION CURVES

10
PLA-RP50AA
PLA-RP60AA
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
NOTCH SPL(dB) LINE
High
33
Medium1
31
Medium2
29
Low
28
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
PLA-RP100AA2
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
PLA-RP71AA
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125
NOTCH SPL(dB) LINE
High
41
Medium1
39
Medium2
36
Low
33
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
58
NOTCH SPL(dB)
High 34
Medium1 32
Medium2 30
Low 28
250 500 1000 2000 4000
BAND CENTER FREQUENCIES, Hz
LINE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
8000