Soundboard Soundboard is a panel made from a homogeneous cellulose fiber. It’s often used in a sandwich application with drywall for sound protection. Soundboard 2013-03-19T15:58:21+00:00 2014-04-22T16:56:47+00:00 fruition Home › Soundboard Specifications Thickness Sheet Size Click link to view more. 1/2" 4' x 8' Additional Notes White 1 Side Additional Notes White 1 Side Questions? 800.936.7378 Call us or email us by following the link below. Contact Us Now!