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[ V Sound Pressure Levels ]
2. NC curves
PEA-M200LA
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
10.0
Approximate minimum
audible limit on
5.0
continuous noise
0.0
63
125
250
Octave band center frequencies <Hz>
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
10.0
Approximate minimum
audible limit on
5.0
continuous noise
0.0
63
125
250
Octave band center frequencies <Hz>
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
10.0
Approximate minimum
audible limit on
5.0
continuous noise
0.0
63
125
250
Octave band center frequencies <Hz>
HWE20020
(External static pressure 60Pa)
High
Low
Middle
500
1k
2k
4k
(External static pressure 100Pa)
High
Low
Middle
500
1k
2k
4k
(External static pressure 200Pa)
High
Low
Middle
500
1k
2k
4k
70.0
65.0
60.0
55.0
NC-60
50.0
45.0
NC-50
40.0
35.0
NC-40
30.0
25.0
20.0
NC-30
15.0
10.0
Approximate minimum
NC-20
audible limit on
5.0
continuous noise
0.0
8k
63
125
70.0
65.0
60.0
NC-60
55.0
50.0
45.0
NC-50
40.0
35.0
NC-40
30.0
25.0
20.0
NC-30
15.0
10.0
Approximate minimum
NC-20
audible limit on
5.0
continuous noise
0.0
8k
63
125
NC-60
NC-50
NC-40
NC-30
NC-20
8k
- 19 -
(External static pressure 75Pa)
High
Middle
250
500
1k
2k
Octave band center frequencies <Hz>
(External static pressure 150Pa)
High
Middle
250
500
1k
2k
Octave band center frequencies <Hz>
Low
NC-60
NC-50
NC-40
NC-30
NC-20
4k
8k
Low
NC-60
NC-50
NC-40
NC-30
NC-20
4k
8k
GB
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