Presented herein are techniques that make use of objective measurements, such as acoustically-evoked inner ear responses, in the fitting process to determine the acoustic prescription (gain functions) that are used by an electro-acoustic hearing prosthesis to translate received sound signals into output acoustic simulation levels. More specifically, a plurality of acoustically-evoked inner ear responses are obtained from an inner ear of a recipient of an electro-acoustic hearing prosthesis. One or more input/output functions for at least one region of the inner ear are determined based on the plurality of acoustically-evoked inner ear responses and the one or more input/output functions are, in turn, used to determine one or more gain functions for use by the electro-acoustic hearing prosthesis.
OBJECTIVE DETERMINATION OF ACOUSTIC PRESCRIPTIONS