looking for tips on soundproofing

[rats]

the tHRIGS new practice space is is my basement and we are sectioning off a corner for it. I got 2 little kids in teh house and need to soundproof it the best I can, knowing I have a very small budget, I'm in a hurry, and I know it won't be completely soundproofed. I've got two by four studs spaced 14" apart all the way around the perimeter, and I'll have this cottony stuffing wrapped in plastic stuffed between them. I'm using 1/4" this drywall on the walls on against the foundation, and the same but two panels thick on the interior walls(both sides of studs) as well as on the ceiling. I will have the floor padded and carpeted.

What other measures can I take, and how well do you think this will work?

Thanks as always for your continued support,
rats

[John Sayers]

That seems fine - some air vents perhaps as you'll be completely sealed in there. I would leave off the final internal drywall and use the 4" cavity for acoustic treatment.

You can put insulation on the 4" cavity and put:
1) Cloth over for high frequency absorber
2) Slots over it for low-mid absorbers
3) Plywood for low frequency absorbers,

cheers
john

[lazyboy]

JS,

I've been meaning to ask you, are you familiar with Icenyne insulation? Its a Canadian company, but there are contractors here in the US, wonder if there are any in Oz.

If you haven't heard of it before, its a heavy foam insulation that is blown in liquid form on bare studding in new construction and as cavity filler in existing construction. Great R value and it seals completely. I'd imagine it must be pretty good for soundproofing, though I have no idea what kind of frequency absorption characteristics it might have.

I ask because I might be building a garage with a 2nd floor studio as early as this summer. I'm considering Icenyne as a possibility...

[John Sayers]

We have some stuff that is liquid sprayed and is used to tighten up staircases etc. It is also used in movies as the surface over sets like rocks etc. I don't know of it's acoustic properties though. I find it hard to get figures on these things. I tried in OZ to get the figures on pure wool insulation that is made in OZ and is great cos it's a natural renewable product, but they haven't done acoustic tests on it, only heat.
cheers
john

[rats]

John: this is interesting, I'm new to this. What kind of cloth are you talking about? Slots? What's a slot? I already bought all my drywall, will the plywood make that much of a difference? If I was to only put plywood on a portion of the room, what would be the most effective place to put it on? The ceiling?