Electrical characteristics of a set of electrodes

A 12-electrode device has been implanted in the cochlea of a deaf human patient. The electrical impedances have been measured for sine-wave excitation at frequencies ranging from 100 to 3000 Hertz. Based on these results, an equivalent electrical circuit has been designed and its parameters computed. In addition, the patient's perception thresholds for sine-wave pulses at similar frequencies have been measured.