The ATI acoustic model was used to predict the sound coverage of the new sirens in the IPEC EPZ. The siren locations and designated siren sound pressure level output in dBC Leq were input into the model. The ATI model then computed expected siren levels throughout the EPZ.
ATI produced a sound contour map which depicts 70 dBC and 60 dBC contour lines over the IPEC EPZ. Individual locations have specific predicted values based on GPS coordinates. The input value for each siren output was 114 dBC Leq.