On the basis of functional morphology, biomechanical properties and topographic relations of the cells of the Corti organ, a physical model was designed for the study of mechanical action in the cochlear partition during sound stimulation. The topographic relations between the supporting and the sensory cells of the organ of Corti transform the basilar membrane deviation into a complex movement of the reticular lamina, which enhances the differences in the deviation of stereocilia of the inner and outer hair cells.