Sound Proofing a door. Ideas !!!


I live in a unit, flat, apartment, whatever you call it. Any ways it
gets a little noiseing in the hallway from time to tme and would like
to sound proof my main door.

Its just a hollow one, problaby why it snot doing frack to stop any
noise. Probalby easist way is to buy a sold door, but I like a project


I was thinking of putting something into the door to sound proof it,
but not sure what.


Any ideas ???