Here's a compliation of some lab metrics I was able to find online of various wall construction designs, ordered by their soundproofing capability.
Just thought I'd put this out there so that you don't have to go looking for it yourself; you can just scan down the list and pick which one best suites you and your budget.
(All DW is 5/8's Type X, All insulation is 4" R12, No GreenGlue unless specified, No soundclips unless specified)
1) Single Stud, Single Layer both sides, Not Insulated:
STC:30 R:??
2) Single Stud, Single Layer both sides, Insulated:
STC:34 R:37
3) Single Stud, Single Layer on one side, Double layer on the other side, Insulated:
STC:36 R:40
4) Single Stud, Single Layer both sides, Resilient channel one side, Not Insulated:
STC:40 R:39
5) Staggered Stud, Single Layer both sides, Not Insulated:
STC:41 R:41
6) Single Stud, Single Layer both sides, one side with MLV, Insulated:
STC:45 R:39
7) Single Stud, Single Layer both sides each with Soundboard, Insulated:
STC:46 R:47
8) Single Stud, Single Layer both sides, Resilient channel one side, Insulated:
STC:46 R:47
9) Staggered Stud, Single Layer both sides, Snaked Insulation with no compression:
STC:47 R:47
10) Single Stud, Double Layer both sides, Insulated:
STC:49 R:48
11) Staggered Stud, Single Layer both sides, Insulated one side with compression:
STC:49 R:48
12) Single Stud, Double layer one side, Triple layer other side, Insulated:
STC:51 R:50
13) Staggered Stud, Single Layer both sides, Resilient channel on one side, Snaked Insulation with no compression:
STC:51 R:52
14) Single Stud, Single Layer on one side, Double Layer on other side GreenGlued, Insulated:
STC:52 R:41
15) Single Stud, Triple layer both sides, Insulated:
STC:52 R:50
16) Staggered Stud, Single Layer one side, Double Layer on other side, Snaked Insulation with no compression:
STC:52 R:52
17) Single Stud, Single Layer on one side, Double layer on the other side with Resilient channel, Insulated:
STC:53 R:52
18) Single Stud, Double Layer on one side, Single Layer on the other side with Resilient channel, Insulated:
STC:53 R:53
19) Staggered Stud, Single Layer one side, Double Layer on other side, Both Sides Insulated no compression and not touching:
STC:54 R:53
20) Single Stud, Double Layer both sides, Both GreenGlued, Insulated:
STC:55 R:48
21) Staggered Stud, Double Layer both sides, Snaked Insulation with no compression:
STC:56 R:56
22) Staggered Stud, Single Layer on one side, Double layer on the other side with Resilient channel, Snaked Insulation with no compression:
STC:56 R:57
23) Staggered Stud, Double Layer both sides, Both Sides Insulated no compression and not touching:
STC:57 R:56
24) Staggered Stud, Double Layer one side, Single Layer on the other side with Resilient channel, Both Sides Insulated and touching:
STC:57 R:58
25) Single Stud, Double Layer on both sides, Resilient channel on one side, Insulated:
STC:59 R:57
26) Double Stud, Single Layer both sides, Insulated both sides:
STC:59 R:60
27) Staggered Stud, Double Layer Both sides, Resilient channel on one side, Snaked Insulation with no compression:
STC:62 R:62
28) Staggered Stud, Double Layer Both sides, Resilient channel on one side With SoundClips, Snaked Insulation with no compression:
STC:63 R:63
28) Double Stud, Single Layer on one side, double layer on the other side, Insulated both sides:
STC:64 R:65
29) Double Stud, Double Layer both sides, Insulated both sides:
STC:69 R:69
30) Double Stud, Single Layer both sides, Resilient channel on one side, Insulated both sides:
STC:?? R:??
31) Double Stud, Single Layer both sides, one side with soundboard and Resilient channel, Insulated both sides:
STC:?? R:??
32) Double Stud, Single Layer on one side, double layer on the other side with Resilient channel, Insulated both sides:
STC:?? R:??
33) Double Stud, Single Layer on one side, double layer on the other side with soundboard and Resilient channel, Insulated both sides:
STC:?? R:??
34) Double Stud, Double Layer both sides, Resilient channel on one side, Insulated both sides:
STC:?? R:??
35) Double Stud, Single Layer on one side, double layer on the other side with soundboard and Resilient channel, Insulated both sides:
STC:?? R:??
36) Double Stud, Double Layer both sides, One side with soundboard and Resilient channel, Insulated both sides:
STC:?? R:??
37) Double Stud, Single Layer on one side, double layer on the other side with GreenGlue and soundboard and Resilient channel, Insulated both sides:
STC:?? R:??
38) Double Stud, Double Layer both sides, One side with GreenGlue and soundboard and Resilient channel, Insulated both sides:
STC:?? R:??
39) Double Stud, Double Layer both sides, both with GreenGlue and soundboard and Resilient channel, Insulated both sides:
STC:?? R:??
40) Double Stud, Triple Layer both sides, both with GreenGlue and soundboard and Resilient channel, Insulated both sides:
STC:?? R:??
41) Double Stud, Double Layer both sides, One side with soundboard and GreenGlue, Resilient channel on one side, Insulated both sides, With 8inches of cement on one side:
STC:?? R:??
That video was made with my Level 31 wall, and by the end of tomorrow I should be near an ideal Level 37 wall.
and version 2.0 of this room would be a Level 41 design
and just in-case in wasn't obvious, most peoples homes in North America are only a Level 2 for their external wall and only a Level 1 inside!!!!
and additionally it should be fairly obvious that a double-studded wall costs (almost) twice as much as a singular (hence why almost nobody does it).
Just thought I'd put that out there just in case that big list made you fall asleep
Edited by BassThatHz - 12/29/12 at 8:39pm