I am renovating a duplex that has an upper and a lower apartment.
The upstairs is now done and has wood floors. My intentions is to fix up and rent out the lower apt. but the sound tranmission between the floors isn't going to be fun for either tenant.
Right now I have the lower apt. stripped including the ceilings so i have some flexibility with what I do.
All noise is trasmitting, from footsteps to radio noise. The old ceiling was just drywall with hollow cavities between the joists.
Rugs are one option upstairs which is fine, but I don't want to cover the whole floor so I want to find a way to make sound travel less.
I can't afford to pay acoustic companies, so I'm looking for a solution appropriate to a small basement apartment. I had considered glass fibre in the cavities and a couple of layers of drywall, but I guess i need to get some mass on the celing to calm down the vibrations' travels.
If anyone has any cost effective solutions then I'd be grateful to hear (read) them.