Soundproof Booth

RomanDesign

We are currently trying to build a soundproof booth for recording. The room is an old control room for an elevator shaft, where the motor and gears were housed. As of right now we are laying a 2x3 perimeter and using cork underlay as our sill gasket. Here are some pics. Any good soundproofing suggestions?
We want to hang the floor from the walls and maybe put 1 or 2 supports in the middle (capped with cork on the feet). Once the floor is decked we were going to add another layer of cork to the plywood surface and maybe the walls and ceiling as well. We are open to doing it different if need be.

RomanDesign

Sorry, here are the pics

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Dwoodsmith

Garage bands with no money hang carpet remnants all over the walls. If the fuzzy sides face each other two layers works more than twice as good.

Bondo

Ayuh,... I agree,... Carpet is way quieter than cork...

RomanDesign

We definately will carpet the floor over the cork if that is the best solution. We are trying to go a step up from typical garage band quality - any products that can be used, will be purchased. Also methods such as surface separation, floating floors, etc... Are all things we want to incorporate.

Bondo

Ayuh,... Don't forget the Walls, 'n Ceiling...

2 layers, with folds vertically....Hanging loosely...

Ted White

Try looking at a room within a room. http://www.soundproofingcompany.com/...within_a_room/

The cork isn't doing a single thing, I'm afraid.

Dwoodsmith

I bought a van one time with a textured foam product on the walls. The guy told me it was soundproofing. Since then I've noticed it everytime I see footage of the inside of a recording or radio studio. It's very similar to the cushioning inside my rifle case.

Ted White

Foam products like that can reduce echo within a room, but don't stop sound from passing through them and into the walls and ceiling. Foam is a sound conditioner, not a sound proofer.

Jack Olsen

Yeah, you need to isolate the inner room. I don't think cork is going to do that very well. And any contact between the walls of your inner room and the elevator shaft means noise will get transfered. I would try to get air cushions or soundproofing foam for underneath the floor -- then have the walls supported on that base and not touching anything.

Where is your exit? You're also going to need to isolate the ceiling of the inner room from some sort of sound-blocking surface above it.

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Jack Olsen

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pyper

First: is this about keeping sound in, or keeping it out.

Second: if it's about keeping sound out, what kinds of sound that you're hearing are you wanting to eliminate. It makes a big difference if it's planes or trucks.

If you're wanting to stop high frequency noise, then those bricks will probably do it. If you're wanting to stop low frequency, then you need to de-couple the inner room from the bricks. Nailing lumber into the existing floor isn't going to do anything to stop low frequency.