TM 5-805-4/AFJMAN 32-1090
Frequency, Hz
One-third octave
Octave
Lower
Lower
Upper
Upper
band
band
band
band
limit
limit
limit
Center
Center
limit
17.8
16
22
11
14.1
16
22.4
17.8
20
22.4
25
28.2
44
31.5
31.5
22
28.2
35.5
35.5
40
44.7
44.7
50
56.2
88
63
63
56.2
44
70.8
80
70.8
89.1
89.1
100
112
112
177
125
125
141
88
141
160
178
178
200
224
355
224
250
177
250
282
315
355
282
355
400
447
710
447
500
562
355
500
562
630
708
708
800
891
1,420
1,122
710
1,000
891
1,000
1,250
1,413
1,122
1,413
1,600
1,778
2,840
1,778
2,000
2,239
1,420
2,000
2,239
2,500
2,818
3,150
2,818
3,548
5,680
4,467
3,548
4,000
2,840
4,000
5,623
4,467
5,000
5,623
6,300
7,079
11,360
8,000
8.913
7,079
5,680
8,000
8,913
10,000
11,220
11,220
12,500
14,130
22,720
14,130
16,000
11,360
16,000
17,780
17,780
20,000
22,390
B-6
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