Piners comment "we used to make "guitars" out of rubber bands and bandaid boxes (when they were still metal). We learned a lot about sound and frequency! My dad taught us a lot about it. The Science of Sound - exploring Vibrations"
UltraTouch 15 in. x 48 in. R30 Denim Insulation (12-Bags)
UltraTouch Denim Insulation is manufactured from high-quality recycled textile fibers. These fibers contain inherent qualities that provide for extremely effective sound absorption and maximum thermal performance. UltraTouch contains no chemical irritants