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PVA-A42AA4
External static pressure .3 [in.WG] (75Pa)
7 .
65.
6 .
55.
5 .
45.
4 .
35.
3 .
25.
2 .
Approximate minimum
15.
audible limit on
continuous noise
1 .
63
125
25
5
5.
Octave band center frequencies (Hz)
.
External static pressure .5 [in.WG] (125Pa)
7 .
65.
6 .
55.
5 .
45.
4 .
35.
3 .
25.
2 .
Approximate minimum
audible limit on
15.
continuous noise
1 .
63
125
25
5
5.
Octave band center frequencies (Hz)
.
External static pressure .8 [in.WG] (2 Pa)
7 .
65.
6 .
55.
5 .
45.
4 .
35.
3 .
25.
2 .
Approximate minimum
15.
audible limit on
continuous noise
1 .
63
125
25
5
5.
Octave band center frequencies (Hz)
.
High
Low
Middle
NC-6
NC-5
NC-4
NC-3
NC-2
1k
2k
4k
8k
High
Low
Middle
NC-6
NC-5
NC-4
NC-3
NC-2
1k
2k
4k
8k
High
Low
Middle
NC-6
NC-5
NC-4
NC-3
NC-2
1k
2k
4k
8k
11
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