... Aluminum Panel 1.light 2.good apparence 3.great rigidity and consistency 4.good plasticity and easy to instal Perforated Acoustic Panel(aluminum ... An university.2. Compared with the common perforated acoustic panel, it has wide sound absorption spectrum, high sound ... 2*0.6*0.05MStructure: perforated aluminum decorative plate, aluminum alloy frame, put 30MM thickness elastic acoustic panel at the back.