Masking-pattern slope predicts low-pass noise pitch strength better than filter slope does

Evidence

A comparison of Figs. 5.34 and 5.36 reveals that the results on pitch strength can be more easily described if, instead of the filter slope, the slope of the masking pattern is used as the abscissa. In this case, pitch strength of low-pass noise increases almost linearly with the slope of the corresponding masking pattern. The maximum pitch strength of low-pass noise is reached with a slope of the masking pattern of about 9dB/ Bark. It has to be kept in mind, however, that even the largest relative pitch strength of low-pass noise (100%) amounts to not more than 1/5 of the pitch strength produced by a pure tone. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 843