... each other and attentuates so as to reach effect of sound absorption.Product specification:Thickness: 1.3mmWidth: 1000mm, or ... viaduct, railway, airport, etc.2,As anti-reflection sound absorbing wall panel &ceiling panel in meeting centre, sports venues, theatre, departure ... lounge, etc.3,Inner wall panel or sound absorbing panel in big exhause muffler, pipe silencer, etc.