Sound Treatment

I purchased some foam mattress pads from good 'ole Sears for $10 a piece (Full size) and am using them to deaden the sound of a boomy room. I setting up an "iso vocal booth" for vocals in one corner of the room and have a peice on the ceiling, a piece on the wall in front of singer and one to his/her left. The the dilemma is wether or not to make this booth a completely enclosed rectangle with two more peices hanging behind the singer and to his/her right or leave the back open/experiment with different shapes like a trapazoid due to room constraints...any thoughts?

BUMPITY BUMP BUMP BUMP

My guess is that the type pf mic you use will greatly determine the type of perimeter you need. If you will be using an omnidirectional mic, you would probably want to go with a full enclosure on all sides, as that mic pattern picks up signal from every angle. Otherwise, a basic condenser/cardioid pattern mic would allow you more room to experiment. I suppose you could close the area behind the vocalist, as well as a wall (or mattress) on each side, leaving the front open. This would normally enable the mic to pick up only what's in front of it, in this case the voice. I'm no expert at this, just tried to use some basic guidleines and my own judgement to help you along. Perhaps someone else can give you a more accurate answer. Of course, you could just experiment and trust your ears until you find what sounds right. Move things around and you'll eventually hit the spot. good luck pk