Just to clarify, the egg cartons and egg crate foam work fairly well for just lowering the sound a bit, but the rigid fiber glass is pretty much as good as it gets in the lowish price range. It will obviously cost you much more than egg cartons, but the sound dampening is extremely effective. Putting your ear next to the egg crate foam won't sound much different than normal, but putting it next to the rigid fiber glass you'll hear nothing.
And yes, I have done side by side comparisons. |