Optimising the clinical fitting of a cochlear implant to an individual listener is an important aspect of post-operative clinical care. The level of success experienced by any individual with a cochlear implant can be influenced, to a significant extent, by the quality of the clinical programming by the audiologist. During clinical programming the audiologist typically measures the amount of electrical charge required to elicit first hearing (the T-level) and to provide a loud but comfortable percept (the C-level) on each of the 22 electrodes. The amount of electrical stimulation required for a threshold and a comfortably loud percept varies across the electrodes of the array and also across individual users. Appropriately set lower and upper electrical stimulation levels are vital for ensuring that the listener is able to detect reasonably soft sounds whilst loud sounds are perceived as loud while remaining comfortable. Achieving this result across the relevant frequency range is a prime aim of programming.