Audio transmission class is usually a measurement of how effectively a reliable constructing materials attenuates airborne sound. OITC means out of doors/indoor transmission class. It should be apparent what it measures from its name. Set simply, it actions sound reduction of out of doors sound in an indoor Place, so https://acoustic-laminated-glass55615.rimmablog.com/37636366/a-simple-key-for-acoustic-laminated-glass-unveiled