1. A method of neural stimulation, of the type in which successive stimuli are presented on an electrode array having one or more electrodes, said stimuli being generated by a stimulus generation device, the method including the steps of: determining a stimulus set for one or more periods; analysing each proposed stimulus set using a predetermined instruction set which is adapted to locate factors indicative of a likely masking effect; if masking effects are detected, altering said stimulus set for one or more of said periods; and presenting the stimuli via said electrode array to a neural structure.