Mitsubishi Electric PLA-RP1.6AA Service Manual page 58

6-6. NOISE CRITERION CURVES
PLA-RP1.6AA.UK
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
PLA-RP3AA.UK
PLA-RP3AA .UK
1
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 31
Medium1 29
Medium2 28
Low 27
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
NOTCH SPL(dB) LINE
High
34
Medium1
32
Medium2
30
Low
28
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
PLA-RP2AA.UK
PLA-RP2.5AA.UK
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
PLA-RP4AA.UK
PLA-RP4AA .UK
1
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
58
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
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