Abstract
Currently, automobile window panes are commonly adopted as single layer plate structure with glass material. Polycarbonate (PC) laminates offer the possibility of designing strong and light weight panes application in automobile. However, the acoustical properties of PC pane is very poor than glass pane because of its high rate of stiffness to low weight. This research is desire to develop new sandwich structures with PC pane for noise insulating instead of single layer glass pane. The sandwich structure consists of two thin laminates plates of the same PC material and a thin thickness lightweight damping core bonded between those plates. In this paper, sound transmission loss is calculated using decoupled equations representing symmetric and anti-symmetric motions for a sandwich PC pane. The effects of various structural and material parameters on sound insulation performance are investigated by means of numerical calculation. Predicted results show that sandwich PC pane has higher transmission loss at interested frequency range with possible compact thinner thickness.
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