TM 5-805-4/AFJMAN 32-1090
Table 4-10. Transmission Loss (in dB) of a Filled Metal Panel Partition and Several Commercially Available Acoustic Doors.
Acoustic Doors, Nominal Thicknesses
Octave
Filled
Two Sets 4-in. Doors
Metal
10-in.
4-in.
2-in.
6-in.
Band
Panel
in Double Walls
Thickb
Thick C
ThicK d
Thick e
32-in. Air Spacef
Partitiona
(Hz)
42
--
27
34
19
--
31
48
--
29
37
22
--
63
54
47
34
41
26
31
125
60
53
36
47
31
34
250
67
61
40
52
36
37
500
75
66
45
55
43
39
1000
84
65
59
49
48
43
2000
69
90
51
62
50
47
4000
--
--
60
--
8000
95
52
71
64
45
58
41
40
STC
Notes:
3
a
Constructed of two 18 ga. steel panels filled with 3 in. of 6-8 lb/ft. glass
fiber or mineral wool; Joints and edges sealed airtight.
b
Average of 4 doors, l-3/4- to 2-5/8-in. thick, gasketed.
c
Average of 2 doors, all 4-in. thick, gasketed around all edges, range of weight
12-23 lb/ft.
d
Average of 4 doors, 6- to 7-in. thick, gasketed, installed by manufacturer,
range of weight 23-70 lb/ft.2
e
Average of 2 doors, each 10-in. thick, gasketed, installed by manufacturer,
range of weight 35-38 lb/ft.2
f
Estimated performance, in isolated 12-in. thick concrete walls, no leakage,
no flanking paths.
4-16
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