TM 5-805-4/AFJMAN 32-1090
Table 4-12. Transmission Loss (in dB) of Type 1 Floor-Ceiling Combinations.
Thickness of Dense Concrete Slab (In.)
10
12
Octave
4
6
8
2
Approximate Surface Weight (lb/ft. )
Band
120
144
48
72
96
(Hz)
29
32
36
36
34
31
36
36
36
37
35
63
36
36
38
37
37
125
44
36
41
38
43
250
41
48
47
45
500
44
48
1000
51
45
50
49
2000
50
52
53
54
55
4000
54
56
58
59
57
60
62
61
8000
58
63
48
STC
51
52
45
49
Table 4-13. Transmission Loss (in dB) of Type 2 Floor-Ceiling Combinations.
Thickness of Dense Concrete Slab (in.)
4
6
8
10
12
Octave
Air Space Between Slab and Suspended
Ceiling
(in.)
Band
(Hz)
24
12
15
18
24
31
29
33
35
37
38
63
35
37
38
40
39
125
37
38
40
41
42
44
250
41
38
46
48
500
43
47
49
51
53
1000
48
53
54
56
57
2000
53
57
61
62
59
4000
61
57
64
63
65
8000
61
64
68
67
69
48
STC
51
52
57
55
4-18
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