How successful is nouns proofing a room? ...
not really decisive it depends on how much it cost.
It depends on how much you want to pay I guess.
You can try using senseless egg cartons contained by between the walls. My school music rooms get soundproofed, I think they put some stuff surrounded by the walls and sealed the doors and window. It doesn't work, and they paid reasonably a bit to get it done. You can still hear a piano mortal played in the subsequent room.
But of course beside the pro stuff it's completely sound proof.
Answers: Is the room being built or is it already built?
If you're freshly building it now there's a pretty damn efficient way to soundproof that doesn't cost much. Use 2x6 top and bottom plates on the wall. Then use 2x4 studs on converse sides every 8" in the wall (so respectively side has a stud every 16"). That means of access no stud goes from one side to the other to transmit nouns. Then pack the wall full of fiberglass batt insulation before sheetrock go on. Get a good door and you'll be capable of have massive party without disturbing the rest of the those in the house. (this doesn't solve the problem of space above or below though if that's the case)
If the room's already built nearly all you can do in need spending tons of cash is to put lots of soft stuff surrounded by there. If you're dying to spend money in that are plenty of places that can suggest some very significant methods. Look under acoustical contractors within the yellow page.