Framing/Wall question... wall facing outside room.

[TomM]

When you have a wall running perpindicular to ceiling joists facing the other rooms in your basement, how do you build the wall?

I haven't seen anything on this... Are most hanging 2 layers drywall (or whatever you choose) on your entire ceiling? What do you do if you only do the ceiling above the soundproofed rooms?

I drew a picture to show what i'm talking about. Unless I build my walls up through the ceiling joists, it will be only 1 leaf.

[knightfly]

One leaf to WHERE, the room next door? I see the subfloor and the ceiling layers as two leaves otherwise... Steve

[TomM]

The picture is meant to look like what you would see if standing in my basement. So the sound travels through the first leaf of ceiling, makes a 90 degree turn and has no second leaf for people standing outside the studio in the basement.

So when you look up above the wall/entrance to studio, you will see space between joists. So the question is, do I need to put layers of drywall around the perimeter of the studio that goes up inbetween the joists?

[knightfly]

Yup; anywhere you want to stop sound, the mass-air-mass thing applies... Steve