| Re: Mattress Sponge as sound insulation and absorption?
Would compressed, nonwoven polyester fabric work? I can get my hands on plenty of resin bonded or needled for free. The needled stuff is soft and fluffy like poly batting, only denser, and the resin bonded stuff is more rigid like a scrubbing cloth, only more dense as well. I'm thinking of using some combination of the two, and I can go plenty thick.
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