Abstract
The nonlinear response of the cochlea to a pure tone is simulated using a novel computational model. In this physiologically-based finite element model, the three-dimensional intracochlear fluid dynamics are coupled to a micromechanical model of the organ of Corti and to electrical potentials in the cochlear ducts and outer hair cells (OHC). Active feedback due to OHC somatic electromotility is represented by linearized piezoelectric relations and is coupled to the nonlinear hair-bundle mechanoelectrical transduction current. Using an alternating frequency/time method and a single set of parameters, we simulate the compressive nonlinearity, harmonic distortion and DC shifts in the response of the cochlea to a single tone. Model predictions agree well with available experimental data.
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