Disclosed is an arrangement allowing for automatic calculation of stimulation parameters, for example dynamic ranges for stimulation, in an auditory prosthesis, for example a multichannel cochlear implant. The arrangement includes, in a preferred form, an electrode
for detecting activity of the stapedius muscle, and uses the electrode array
to sense neural response to stimulation, so that a maximum comfortable stimulation level and threshold level for each channel can be determined. The process may be initiated by the implantee, avoiding the requirement for external equipment and extensive audiological testing.