Goff’s stock 4 sided sound control screen 31811 – 5’w, 5’w, 5’w & 5’w x 8’h goff’s sound control screens are designed to dramatically reduce harmful industrial strength noises. Durable and sleek, sound curtains can reduce noise by up to 45db with a typical stc of 26 within the coverage area. . Panels are constructed with a viscoelastic acoustic damper with suspend mineral particles and an aluminum constraining layer. Outer 18oz vinyl material is water, mildew, and rot resistant. Panels are attached to a portable, heavy duty, yet lightweight; 1-3/16″ extruded aluminum frame. Please note: sound transmission loss is based on frequency. Please see chart for specific db reduction. custom sizes and other colors available; call for more information.