Main excitations make critical-band level equal excitation level at signal centers

Evidence

In the case of main excitations, (at critical-band rates corresponding to the centre frequency of the critical-band wide noise or to the frequency of the tones) critical-band level and excitation level are identical. Because broadband noise, like white noise produces only main excitations, the excitation level and critical-band level of white noise are indistinguishable. For criticalband wide band-pass noise, however, only one single value, the maximum value, is identical. Starting from this point, the slope of masked threshold towards lower frequencies and the slope towards higher frequencies have to be added in moving from critical-band level to excitation level. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 963

Categorization

• DEFINE: States when the two levels are identical (main excitations only) and what must be added otherwise.
• corroborated: 2 independent passages support this claim — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 963