Adaptive system and method for place-pitch ranking a...

Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems

Reexamination Certificate

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C607S055000, C607S056000, C607S137000, C600S559000, C381S320000

Reexamination Certificate

active

07835799

ABSTRACT:
An adaptive place-pitch ranking procedure for use with a cochlear implant or other neural stimulation system provides a systematic method for quantifying the magnitude and direction of errors along the place-pitch continuum. The method may be conducted and completed in a relatively short period of time. In use, the implant user or listener is asked to rank the percepts obtained after a sequential presentation of monopolar stimulation pulses are applied to a selected spatially-defined electrode pair. The spatially-defined electrode pair may be a physical electrode pair or a virtual electrode pair. A virtual electrode pair includes at least one virtual electrode contact. Should the patient's judgment of pitch order be correct for all applied interrogations, then no further testing involving the tested electrode pair (two electrode contacts) is undertaken. However, should there be errors in the place-pitch ranking, which errors evidence perceptual place-confusions, then a search is undertaken for the spread of the perceptual confusion. This search for the spread of confusion continues until no errors are made in all directions. Identified channels wherein pitch confusion exists may be de-selected (not used) during normal operation of the cochlear implant or other neural stimulation system.

REFERENCES:
patent: 6611717 (2003-08-01), Clark et al.

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