MICRO-PERFORATED PANELS FOR DUCT SILENCING

Micro-perforated panels have been used for duct silencing for several years and are gaining popularity. This paper presents equations for pr edicting the sound attenuation of micro-perforated panel silencers. It also presents guidelines for silencer geometric parameter selection t o improve silencer performance. The guide-lines are taken from both si lencer tests and theoretical analyses. (C) 1997 Institute of Noise Con trol Engineering.