Pitch strength results were normalized per frequency region for comparison across panels.

Evidence

The relative pitch strength of the sounds 1-11 is displayed in Fig. 5.25. Each of the three frequency regions is represented by a separate panel, and in each panel pitch strength was normalized relative to the maximum value in the panel. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 796