An acoustics measurement program for evaluating auditoriums based on the early/late sound energy ratio

The importance of the early reflection portion of a sound decay process in an auditorium is well established. Curves showing early/late sound energy ratios (ELR) in the early reflection period comprise a useful way of examining energy-time data within that period. An auditorium measurement and analysis procedure using ELR data in the period between 20 and 200 ms after the arrival of the initial signal is presented.