Excitation detectors are modeled as independently acting channels with occasional coherence effects

Evidence

This model assumes that the excitation level is picked up along the critical-band rate scale by many detectors that act independently from each other. In case of excitation-level variations that are in phase along the criticalband rate scale, i.e. coherent, there may be an addition of probabilities or other laws (not clear so far) that may influence the deteetability somewhat. These effects, however, are side effects that are only expected in rare cases, and the assumption of the independently acting channels is satisfactory in most cases. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1126

Categorization

• QUESTION: The ‘addition of probabilities’ for coherent excitation variations is flagged as ‘not clear so far’ — a genuine open question in the model worth chasing down.