1. A system for fitting a hearing prosthesis to a recipient, comprising: a stimulation arrangement that at least one of mechanically and acoustically stimulates the recipient to generate displacement of the fluid within the recipient's inner ear based on an input signal; a neural response detection arrangement comprising at least first and second electrical contacts disposed on the outside of recipient's inner ear to detect a neural response of the recipient's auditory nerves to the displacement of the fluid within the recipient's inner ear; and a processor that executes a set of algorithms to assess the recipient's neural response in real-time and that adjusts operation of the hearing prosthesis based on the assessment of the neural response.