Building Gobos?

SeanHurley

I'm about to build some gobos for my live room to mainly control some of the reflections (and maybe be used to form a vocal booth) but also to provide some useful control over spillage when recording a full band.

My plan is to build along the lines of the gobos featured in this thread:

http://www.gearslutz.com/board/studio-building-acoustics/698601-trh-gobo-build.html

The design would be 4in of rockwool then a sheet of plywood then a further 4in of rockwool i.e. fabric covered rockwool would be on the outside on both sides with a plywood centre.

I'm a bit dumb when it comes to this sort of thing but is this a decent design? Also does anyone have any advice on what type of rockwool? I had thought RW3 was the one to go with but the guy at the insulation place said RW50 might be the way to go.

Thanks in advance

madtheory

He might be right if RW50 is more dense than RW3. You can check the specs on the rockwool website. More dense means more absorption in the same space (to a point). And yes, that is an excellent design. Dandan knows what he's talking about, nosebleed is some kind of wierdo.

CrimsonSounds

RW3 doesn't go down as low as RW5 does - the density on RW5 is twice the RW3. It's also a little more tricky to get yoru hands on as it's "beautique" for teh insulation providers. Depends on what frequencies you are trying to trap. The RW3 traps frequencies higher than the RW5, so a combination is probably best.