Try putting egg shell cases (like Aloha_Doha_1981 suggested) on the wall and cover it with lots and lots of styrofoam, you can put as many layers as you want, and carpet your floor.
Try putting egg shell cases (like Aloha_Doha_1981 suggested) on the wall and cover it with lots and lots of styrofoam, you can put as many layers as you want, and carpet your floor.