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Mar 14, 2014 at 20:18 comment added mac Egg crate foam also doesn't do much for transmission of sound anyway. It cuts down on reflection, but not much for transmission. To reduce transmission 1) seal openings 2) add mass (heavier items vibrate less) 3) structurally de-couple ("float") walls and ceilings
Mar 13, 2014 at 2:15 history answered OrganicLawnDIY CC BY-SA 3.0