Relating the acoustic decay back to the 3D reflection path of a ray is an extremely powerful tool in the design of any aural enclosure. In this analysis, you can simply click and drag the mouse around the decay graph to select the ray that passes closest by. If you are displaying generated rays/particles in the model, the path of the currently selected ray is also drawn within the Model Canvas.
This way it is possible to quickly identify regions of unusually high or low absorption within the model by simply dragging the mouse looking for rays that either decay very quickly or very slowly. Any commonality in their reflection sequences is a good indication of a potential acoustic problem.
In this analysis method there are two distinct ways to view the decay, as either absolute or relative sound levels. See the Acoustic Rays topic for more information in the difference between the two. In both methods, the level and delay of any ray at any particular time represents a point with a 2D graph with delay along the horizontal axis and level in the vertical. With a large number of rays, it is possible to display how often points in different parts of the graph occurred within the ray set by generating a frequency distribution. The rate of occurrence is then indicated by more intense colour.