Abstract: Arrangements are described for generating electrode stimulation signals to electrode contacts in an implanted cochlear implant electrode array. Electrode stimulation signals are a sequence of monophasic stimulation pulses varying in polarity between positive polarity and negative polarity with successive pulses separated in time by an interpulse interval sufficient for neural response. Accumulated charge imbalance and charge imbalance polarity are calculated for each electrode contact after each stimulation pulse. For each electrode contact a stimulation pulse has the same polarity as an immediately preceding stimulation pulse for that electrode contact only when the charge imbalance polarity has opposite polarity from the immediately preceding stimulation pulse for that electrode contact, and the accumulated charge imbalance exceeds a defined charge imbalance threshold value. Otherwise, each stimulation pulse has the opposite polarity as the immediately preceding stimulation pulse for that electrode contact.

Abstract: Arrangements are described for generating electrode stimulation signals to electrode contacts in an implanted cochlear implant electrode array. Electrode stimulation signals are a sequence of monophasic stimulation pulses varying in polarity between positive polarity and negative polarity with successive pulses separated in time by an interpulse interval sufficient for neural response. Accumulated charge imbalance and charge imbalance polarity are calculated for each electrode contact after each stimulation pulse. For each electrode contact a stimulation pulse has the same polarity as an immediately preceding stimulation pulse for that electrode contact only when the charge imbalance polarity has opposite polarity from the immediately preceding stimulation pulse for that electrode contact, and the accumulated charge imbalance exceeds a defined charge imbalance threshold value. Otherwise, each stimulation pulse has the opposite polarity as the immediately preceding stimulation pulse for that electrode contact.

Abstract: A method of determining insertion status of a cochlear implant electrode array into a cochlea of a patient is provided. The method includes measuring conductivity associated with an electrode in the electrode array. Insertion status of the electrode is determined based, at least in part, on the measured conductivity.

Abstract: A system, method, and computer product for adjusting dynamic range of electrical stimulation associated with a cochlear prosthesis system is provided. The cochlear prosthesis system includes an electrode array for stimulating the acoustic nerve. Present electrode impedance values are determined for an electrode in the array. At least one stimulation parameter for the electrode is adjusted based, at least in part, on the present electrode impedance values, such that hearing sensation is not influenced due to a change between the present electrode impedance values and previous electrode impedance values.

Abstract: A method of determining insertion status of a cochlear implant electrode array into a cochlea of a patient is provided. The method includes measuring conductivity associated with an electrode in the electrode array. Insertion status of the electrode is determined based, at least in part, on the measured conductivity.

Abstract: A system, method, and computer product for adjusting dynamic range of electrical stimulation associated with a cochlear prosthesis system is provided. The cochlear prosthesis system includes an electrode array for stimulating the acoustic nerve. Present electrode impedance values are determined for an electrode in the array. At least one stimulation parameter for the electrode is adjusted based, at least in part, on the present electrode impedance values, such that hearing sensation is not influenced due to a change between the present electrode impedance values and previous electrode impedance values.