1. A method of adjusting a speech processing strategy, the method comprising: determining a transfer function of a cochlear implant user by administering a psychophysical test to the cochlear implant user that determines a smallest detectable spectral contrast as a function of frequency, wherein determining the smallest detectable spectral contrast comprises analyzing the cochlear implant user's ability to discriminate between frequencies in a spectrum; selecting an enhancement filter function that matches the determined transfer function; generating filter parameters of the enhancement filter function based on the transfer function; and adjusting a speech processing strategy based on the generated filter parameters.