Your problem is not unique. There is an entire industry of using engineered elements to sound proof rooms. If you do an internet search you can find a number of solutions. Granted these are on a different scale but should give you a few ideas to help soundproof your floor. I found these web sites looking damping materials myself.
sound proof floor - practical examples?
hello. i am in a condo on the top floor, it has decent sound proofing but was built in 2000 or 2001. i've read up on sound proofing, preventing my stereo sound from being too loud downstairs, but i'm wondering if anyone has an practical examples where it helped or didn't help.
for example i was thinking of 2.0lb/ft MLV and closed cell foam under carpet pad and carpet to help me turn up my volume a little. right now i'll pop in jazz or vocal, classical and get anywhere from 40db (which is pretty much silence in my space) to 77db peaks. i'd like to go a little more than that, 88db peaks maybe?
thanks
for example i was thinking of 2.0lb/ft MLV and closed cell foam under carpet pad and carpet to help me turn up my volume a little. right now i'll pop in jazz or vocal, classical and get anywhere from 40db (which is pretty much silence in my space) to 77db peaks. i'd like to go a little more than that, 88db peaks maybe?
thanks