TM 5-805-4/AFJMAN 32-1090
Figure 4-4. Typical Floating Floor Construction.
Table 4-16. Approximate Improvement in Transmission Loss (in dB) When Type 5 Floating Floor is Added to Types 1
through 4 Floor-Ceiling Combinations.
Thickness of Floating Floor Slab (tn.)
5
3
4
Air Space Between Structural Slab
and Floating Slab (in.)
Octave
2
2
2
Add Following Values (in dB) to
Band
Type 1-Type 4 TL Values
(Hz)
9
31
5
7
11
63
7
9
12
125
8
10
13
250
9
11
14
500
10
12
15
1000
11
13
16
2000
12
14
16
4000
12
11
16
8000
12
14
14
STC
10
12
Note:
1. To achieve these values in practice, flanking paths
of noise and vibration must be eliminated. Use only
one half there values if flanking paths are not
clearly reduced by intentional design measures.
4-20
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