Few weeks ago, I found a HUGE piece of foam put out on the street for collection. It appears to have been part of a double mattress. As it happens, I reclaim soft sponge foam and polystyrene (among many other things), on a regular basis, for puppet making and theatre props - so this was a good find (this stuff is expensive!)
I know this is not the right sort of 'foam' used in studios. It should be the rigid, closed cell type, I think? But this mattress is formed in 2 inch squares on one side, meaning it forms a grid with deep grooves. Just for the hell of it, I shouted against it to see how it worked acoustically, not expecting very much. It has the effect of deadening the reverberation of my voice and so rather than cutting it up for making other things, I am wondering how best I could put this to use in my little talk studio?
I presume it's perhaps not so much the foam itself, but the deep grooves breaking up the sound and it works surprisingly well. I'm wondering whether to cut it into rectangular blocks to mount in key places or keep it whole. Was wondering if it might be worth making a portable screen around my mic position or something?
I know it may sound silly (no pun intended) but it came to me for nothing and it might be worth a try, until I can afford to do a proper room treatment.