Standard Mapping uses a statistical formula to calculate the reflected sound levels from the Direct Sound levels and the RT Times generated using either the Eyring or Sabine formulas.

Standard Mapping With Reflections, an EASE feature not available in EASE JR, replaces the generalized Eyring or Sabine generated RT Times with RT Times developed by ray tracing. Mapping With Reflections is a more accurate method, but the calculations take more time.

What Mapping With Reflections does do quickly is to generate data on a few selected locations that can then be compared to the Maps generated using the formulas to validate their accuracy.