Abstract
We have investigated the way in which an attempt is made at finding phenomenological mathematical expressions for intensity characteristics of two-tone suppression inferred from forward masking experiments. Analysis of frequency distribution of two-tone suppression leads to the derivation of two simple equations that describe the relationships between the stimulus energy or a variable proportional to it, and either the average receptor potential or the average firing rate of receptor. The equations imply that two-tone suppression perform a power-function transformation on the results. An exponential function is derived for the saturation at sufficiently high stimulus levels. The equations generate numerical values in close agreement with empirical intensity characteristics of receptor. Usually, two-tone suppression appear to obey a power of approximately 0.5
