This is going to sound wierd but I wanted to run the idea by y'all. In my hatchback I have a yoga mat laid out so that the things back there don't move. Works pretty good. I've been thinking about cheap alternatives to sound deadening material and thought what if I used yoga mats in different locations. They're made out of a sturdy foam, waterproof and somewhat sticky. For $10 you can get a 2' x 6' piece of this stuff. I was mostly thinking of putting this under the carpet. Would this work?