I think I can hear sounds from underneath the floor board, and it is most noticeable when I go over small bumps.
Before getting any of my audio stuff started, sound deadening sounds like a fun weekend project. I'm definitely considering sound deadening material like Dynamat, Elemental Designs seem to have some good prices per sq. ft. with their eDead products. 80mil sounds reasonable.
What I'll probably do is knock on various panels and mark any vulnerable spots, and then go on from there.
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