TM 5-805-4/AFJMAN 32-1090
Table 4-14. Transmission Loss (in dB) of Type 3 Floor-Ceiling Combinations.
Thickness of Dense Concrete Slab (in.)
12
6
8
10
4
Octave
Air Space Between Slab and Suspended
"High TL" Acoustic Ceiling (in.)
Band
24
15
18
24
(Hz)
12
42
35
38
40
31
31
44
41
42
39
63
37
46
41
43
44
125
39
52
44
48
50
250
41
58
50
53
55
500
46
63
57
59
61
1000
52
68
62
64
66
2000
57
71
67
69
70
4000
62
76
74
75
71
8000
66
62
55
58
60
STC
51
Table 4-15. Transmission Loss (in dB) of Type 4 Floor-Ceiling Combinations.
Thickness of Dense Concrete Slab (in.)
12
6
8
10
4
Air Space Between Slab and Resiliently
Suspended Plaster Ceiling (in.)
30
18
24
30
Octave
15
Thickness of Dense Plaster Ceiling (in.)
Band
2
1
1
14
(Hz)
1
16
38
41
44
31
33
48
42
44
46
63
39
51
43
46
48
125
41
58
48
51
54
250
44
64
54
57
60
500
50
69
61
64
66
1000
56
74
66
70
72
2000
61
77
72
75
76
4000
67
83
75
78
81
8000
70
68
59
61
64
STC
55
Note :
1. If plaster ceiling is not resiliently suspended,
USe
average of Tales 5-23 and 5-24 values.
4-19
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