[Explantation of residual effect]

The direct spatial-temporal description of oscillations of the internal ear basilar membrane, arbitrarily called "oscillographic vision" of these oscillations, made it possible to create a model for two systems of auditory perception of sound pitch [1]. On the basis of this model, the residual effect is explained by the action of the main system, the system of periodicity analysis. A procedure of calculating the zone of occurrence of the residuum is described. The predominance of the complex of low-frequency constituents of the residual sound is explained. A qualitative and a quantitative description of high-frequency rectangular pulse shifts induced by the action of the fine structure of these pulses are given. The assumption is made that these results can be used for comparing the accuracy of the two systems of sound pitch perception.