Numerical Simulations of Otoacoustic Emissions from a Non-linear Non-local Cochlear Model

Otoacoustic emissions are numerically simulated from a nonlinear nonlocal cochlear model solved in time domain by means of the space-state matrix technique. The feedback mechanism localized in the outer hair cells system is modeled as a nonlinear active force proportional to the total pressure acting on the basilar membrane or as an anti-damping nonlinear term proportional to the velocity of the membrane itself. The model seems to be a very good tool for simulating cochlear dynamics in different regimes of the cochlear parameters and in particular when strong nonlinearities are put into the model.