ideal wall for soundproofing?

[spitfire909x]

Hey all, for some reason my computer isn't letting me post on John Sayers forum right now. I'm just wondering what a diagram of the typical mass-air-mass wall would look like, this would be for a room inside of a house.

Would it be something like (nextdoor room) sheetrock, 2x4/insulation, sheetrock, sheetrock, sheetrock (liveroom) Where does the air gap go is my main question? Thanks

Haha, sorry if that's confusing but its the best way I can describe it without some sort of drawing program. Basically I'm asking if thats the order of the wall construction from the room over into the studio room.

Thanks for the help.

 

[Rod Gervais]

Hey all, for some reason my computer isn't letting me post on John Sayers forum right now. I'm just wondering what a diagram of the typical mass-air-mass wall would look like, this would be for a room inside of a house.

Would it be something like (nextdoor room) sheetrock, 2x4/insulation, sheetrock, sheetrock, sheetrock (liveroom) Where does the air gap go is my main question? Thanks

Spitfire,

well your post header and your post are asking 2 very different questions.

Mass air mass systems are exactly what you describe - the air-gap doesn't "go" anywhere, it exists in the space of the stud and insulation.

SO you have mass on one side of a wall - the sheetrock in the other room - then the stud with insulation (the air space) then the mass on your side of the room - (your 3 layers of sheetrock).

Now that you understand that - let's see if we can deal with your original question - the "ideal wall".

I suppose the easiest way to explain it would be this - the ideal wall will be that which maximizes your isolation without exceeding the capacity of your weakest link.

http://groups.msn.com/_Secure/0SAD...AAAAynJcAg/Image1.jpg?dc=4675560960317632887

Take a look at the picture - you'll see what you describe with a typical floor above.

In this case - adding the insulation and more drywall to one side of the wall is going to do you little good because the flanking paths will have less isolation than the wall - so you'll just be throwing your money away.

A room within a room is the best assembly you can acheive.

Do a search for room with room and study up on the concept.

Rod