I’ve been wanting to do this for years. I work for the US Government, I had a three day weekend this past weekend, so I took the opportunity to clear out the closet in my studio room and using about $400 USD, I converted it into a highly functional vocal booth.
Basically, once the closet was cleared, I hung a big box of twenty-four 2″ x 12″ x 12″, and some 2″ x 24″ x 24″ Ultimate Acoustics foam I purchased from Guitar Center.
I ran a 25′ XLR cable from my patchbay into the booth.
I placed a mic stand in there. I’ve been trying out different mics, the one pictured is an MXL CR77 (my favorite for my voice).