What are some inexpensive ways to soundproof a room?
Don’t forget to carpet the floor and use acoustical tiles on the ceiling, a suspended ceiling using acoustic panels would be even better. If you don’t mind the room looking like a small radio station you can put acoustic tile on the walls. But.. are you trying to keep sound in or out? Most of the ideas given are for keeping sound in , they will work to keep sound out but will work better if applied to the outside or sound producing side of the walls. You’ll become a tourist destination, “See the house that wears old clothes!” On an exterior wall plants such as dense evergreens like cedars and arbor vitae or tall boxwood hedges will help. Use double or more glazed windows and storm windows. I really like Jack Scotty’s miserly, er, frugal, approach, you can buy cloth batting used for blankets and comforters and hang that instead of old clothes or use tapestry or heavy curtains instead of blankets but you’ll miss out on the possibility of finding forgotten change in the pockets of the old
The best and the cheapest solution will be to apply QuietGlue to your existing surface (as it is), screw the new drywall over top, and fill in the seams with acoustical caulk and repaint.
http://www.quietrock.com/soundproof-products/damping-glue.html
