Here is a small collection of the most popular sound tests.  All wall constructions are 2" x 4" and framed 24" on center plus R-13 fiberglass insulation.  Most tests below have been performed by a third party, some tests were performed by the manufacturer, and others are estimates based on other tests performed.  If you would like an official copy of any of the tests, then please contact us.

Material Tested		Source Side		Receiving Side		STC	OITC
Green Glue (2 tubes per 4' x 8')		Double layer drywall with Green Glue		Single layer drywall		52	35
		Double layer drywall with Green Glue		Double layer drywall with Green Glue		55	39
		Triple layer drywall with double Green Glue		Triple layer drywall with double Green Glue		57	43
Extra Layers of Drywall		Single layer 5/8" drywall		Single layer 5/8" drywall		37	29
		Double layer 5/8" drywall		Single layer 5/8" drywall		39	30
		Double layer 5/8" drywall		Double layer 5/8" drywall		42	32
		Triple layer 5/8" drywall		Triple layer 5/8" drywall		45	34
		Quadruple layer 5/8" drywall		Quadruple layer 5/8" drywall		48	36
QuietGlue (2 tubes per 4' x 8')		Double layer drywall with QuietGlue		Double layer drywall with QuietGlue		45	33
QuietRock 525		Single layer of QuietRock 525		Single layer 5/8" drywall		51	32
		Single layer of QuietRock 525		Single layer of QuietRock 525		54	33
Mass Loaded Vinyl (1 lb. per sq. ft.)		MLV hung limp and single layer 5/8" drywall		Single layer of 5/8" drywall		45	31
		MLV hung rigid and single layer 5/8" drywall		Single layer of 5/8" drywall		44	33
Soundboard		Single layer 1/2" soundboard and single layer 5/8" drywall		Single layer of 5/8" drywall		43	31
		Single layer 1/2" soundboard and single layer 5/8" drywall		Single layer 1/2" soundboard and single layer 5/8" drywall		46	32
Steel Stud Framing		Steel studs with single layer drywall		Steel studs with single layer drywall		50	32
		Steel studs with single layer drywall and Green Glue		Steel studs with single layer drywall		59	40
WhisperClips (25 gauge hat channel)		WhisperClips 48" O.C.  by 24" O.C. with double layer 5/8" drywall		Single layer 5/8" drywall		61	42
IsoMax clips (25 gauge hat channel)		IsoMax 48" O.C.  by 24" O.C. with double layer 5/8" drywall		Single layer 5/8" drywall		60	38
RSIC-1 clips (25 gauge hat channel)		RSIC-1 48" O.C.  by 24" O.C. with double layer 5/8" drywall		Single layer 5/8" drywall		60	38
RSIC-V clips (25 gauge hat channel)		RSIC-V 48" O.C.  by 24" O.C. with double layer 5/8" drywall		Single layer 5/8" drywall		52	32