title: Dual-electrode pitch discrimination with sequential interleaved stimulation by cochlear implant users.
abstract: Cochlear implant users may perceive intermediate place-pitches between those elicited by the individual electrodes when two electrodes are stimulated simultaneously or sequentially. This study examined pitch discrimination between adjacent electrodes using sequential dual-electrode stimulation in terms of the sensitivity index, d', which was obtained by adding d's from intermediate dual-electrode stimuli. Loudness was balanced for each tested pair and the intensities were roved. Twelve ears with the Nucleus 24 or Freedom implants demonstrated a wide range of d', from 0.7 to 9.6. "Virtual channels" can be implemented through nonsimultaneous stimulation, with comparable pitch discrimination to that observed with simultaneous stimulation.
authors.affiliation: Cochlear Americas, 400 Inverness Parkway, Suite 400, Englewood, Colorado 80112, USA. bjkwon@gmail.com
authors.forename: Bom Jun
authors.initials: BJ
authors.lastname: Kwon
authors.forename: Chris
authors.initials: C
authors.lastname: van den Honert
mesh_terms: D000161:Acoustic Stimulation / Q000379:methods*; D003054:Cochlear Implants / Q000523:psychology; D004566:Electrodes; D004867:Equipment Design; D034381:Hearing Loss / Q000503:physiopathology* / Q000534:rehabilitation; D006801:Humans; D010897:Pitch Discrimination / Q000502:physiology*; D013647:Task Performance and Analysis