Several aspects of two‐tone suppression in auditory‐nerve fibers have been reproduced in a nonlinear computational model for motion of the basilar membrane. In the model, a distinction is made between mechanical nonlinearity (related in the model to membrane velocity) and neural excitatory signal (related in the model to first or second spatial derivative of membrane displacement). Forf1(frequency of exciting tone) equal to CF (characteristic frequency), the model successfully reproduces the physiologically observed distinction betweenf2(frequency of suppressing tone) greater than CF andf2