Drywall questions

[Oldmate30beers69]

Hey guys, I'm building a studio that will be used primarily for drumming and rehearsals, a little bit of recording. I don't have any neighbours but I'm still trying to reduce the amount of sound getting out. I've got a double stud wall set up with foam underneath the internal wall to isolate it from the flooring.

Now my question is this. I can do a layer of acoustic drywall (soundchek we call it here in aus) for around 2k, or a layer of the fireproof stuff for a bit cheaper. I could do 3 layers of regular sheets for less again. What would give me the most attenuation do you think?

 

[Slouching Raymond]

You could try cement board. Heavier than plasterboard. Costs more though.
The heavier your board, the more it stops noise.

 

[Papanate]

Hey guys, I'm building a studio that will be used primarily for drumming and rehearsals, a little bit of recording. I don't have any neighbours but I'm still trying to reduce the amount of sound getting out. I've got a double stud wall set up with foam underneath the internal wall to isolate it from the flooring.

Now my question is this. I can do a layer of acoustic drywall (soundchek we call it here in aus) for around 2k, or a layer of the fireproof stuff for a bit cheaper. I could do 3 layers of regular sheets for less again. What would give me the most attenuation do you think?

3 Layers offset by 2 inches - so 9 inches total - would give great isolation - but drywall alone is not enough - especially if your walls are parallel - you should put up deflecting panels as well - the sound can’t travel far with these in place.

 

[ecc83]

To some degree walls are the easy bit! The ceiling and roof can leak a lot of sound and you cannot just go gaily adding mass there without consulting a structural engineer.

"Foam to isolate the floor"? How so? the floor need to be totally decoupled from the walls with proper elastic joist hangers AFAIK. For wood that is. If a concrete floor the wall must be "floated". You can stop a great deal of drum noise from entering the floor however by putting the kit on a platform of about 250mm height made of timber and flooring grade chipboard and filled with GF or RW. This 'plinth' floats on rubber blocks.
You can even utilize the plinth as a "diss board" and fit mains outlets and XLRs/jacks for mics and headphones...there's tidy isn't it!

Dave.