Overlapping excitation slopes raise the valley minimum by at least 3 dB

Evidence

Although it is not yet known exactly how the slope excitations add up, a reasonable approximation seems to be to round the excitations of the slopes, especially where a deep valley is produced. For equal excitation level of the lower and upper slopes, this means that the minimum is enhanced by 3 dB. Experimental results have shown that this enhancement may even be larger (see Sect. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 970

Categorization

• QUESTION: The mechanism by which slope excitations sum remains unknown; only an empirical rounding approximation exists.