Is there a chart w/ rockwool STC?

I mean, is there a chart a formula, whatever, that helps me decide what kind of rockwool should I use btw my walls on my studio? They have different density, in form of board... I don't even know how thick should it be... Any help?

3" AFB with a density of 2.5pcf is what you should go for. Bryan Giles check this site out and download their lit. In there use manual they spec 3" AFB here is the link below http://199.202.236.133/usa/pdf/afb_sell_sheet1.pdf

Geronimo, if you're used to the metric system that's the same as 40-45 kG per cubic meter... Steve