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Originally Posted by travisbrown  Would pink fibreglass be fine here, or something more specialized? |
My traps were built with a similar type of fibreglass. The one I used was made from wall insulation with sound absorbing features.
In Australia they are made by Bradford and called Soundscreen Plus. I used the R3 version
Accoustic Insulation – Soundproof your home.
All those pink fibreglass insulation companies make sound proofing insulation also and it is usually reasonable in price as long as you stick to the domestic types.
The handy thing I found was that as they come in rectangular shape packaging I could just keep them in the packet they came in and and wrap them in cloth. They then stacked on top of each other. Well I did take a saw and cut a foot or so off the top of one packet so they would fit snugly in the corner and up against the ceiling.
With some left overs I made some smaller absorbers of the size you are considering.
They do say 4" thick is preferred to 2" so 2 sheets together of that sort of product would get you a good absorber. A bit messy when handling but very cheap.
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Originally Posted by travisbrown Yeah, I'm not sure about this. The desk will be on casters, so I might just roll the desk out a foot or two if close wall proximity is a problem. |
Check this out.
Genelec Oy - Wall behind the Loudspeaker Cancellation
According to this article flush mount is best. After that its placing them as close as possible to the wall that they can get. So your plan in your drawing looks solid and you may not need to get rid of your drywall at all.
Cheers