The Sonic Barrier 1/2" acoustic damping foam is a precisely engineered material that offers optimum absorption for its thickness * The material features our exclusive embossed surface finish that helps to trap acoustic energy and improve high frequency performance * A very aggressive pressure sensitive adhesive provides easy and permanent installation onto any surface * The Sonic Barrier 1/2" foam is excellent for use in small loudspeaker projects, where bulky damping materials are not feasible * This can reduce unwanted sound reflections and prevent them from exiting through the cone or port