Noise Criterion Curves - Mitsubishi Electric PLA Sseries Service Manual

5

NOISE CRITERION CURVES

PLA-M35EA2(-ET/ER).UK
90
80
70
60
50
40
30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125
PLA-M71EA2(-ET/ER).UK
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
OCH783
NOTCH SPL(dB)
High 31
Medium1 29
Medium2 28
Low 26
250 500 1000 2000 4000
BAND CENTER FREQUENCIES, Hz
NOTCH SPL(dB)
High 34
Medium1 32
Medium2 30
Low 28
500 1000 2000 4000
PLA-M50EA2(-ET/ER).UK
LINE
PLA-M60EA2(-ET/ER).UK
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
NC-20
CONTINUOUS
NOISE
10
8000
63
PLA-M100EA2(-ET/ER).UK
LINE
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
NC-20
CONTINUOUS
NOISE
10
63
8000
12
NOTCH SPL(dB)
High
Medium1
Medium2
Low
125 250 500 1000 2000
BAND CENTER FREQUENCIES, Hz
NOTCH SPL(dB)
High
Medium1
Medium2
Low
125 250 500 1000 2000
BAND CENTER FREQUENCIES, Hz
LINE
32
31
29
27
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
4000 8000
LINE
40
37
34
31
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
4000 8000