Sounds_Real - so you've poured the lightweight concrete and had a good result?
the more i read, the more i think about it, it sounds like MLV which i think is like dynamat for car audio, which is layered/glued onto a 1/4" to 3/4" thick closed cell foam is likely to reduce both impact noise and airborne noise. the mass loaded vinyl (MLV) should be lifted off the floor, thus the closed cell foam attached to it.
i've even wondered about 2 layers of the foam/MLV, then carpet pad and carpet.
but like i said, there doesn't seem to be any actual experience.
i think i realize that lower frequencies, say 400 and below are going to continue to be a problem. i wish i could find someone who actually did some type of floor treatment and then was able to measure at the apartment/condo below to see what results were had.
the more i read, the more i think about it, it sounds like MLV which i think is like dynamat for car audio, which is layered/glued onto a 1/4" to 3/4" thick closed cell foam is likely to reduce both impact noise and airborne noise. the mass loaded vinyl (MLV) should be lifted off the floor, thus the closed cell foam attached to it.
i've even wondered about 2 layers of the foam/MLV, then carpet pad and carpet.
but like i said, there doesn't seem to be any actual experience.
i think i realize that lower frequencies, say 400 and below are going to continue to be a problem. i wish i could find someone who actually did some type of floor treatment and then was able to measure at the apartment/condo below to see what results were had.