2013
DOI: 10.1121/1.4820889
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Effect of mismatched place-of-stimulation on binaural fusion and lateralization in bilateral cochlear-implant users

Abstract: Bilateral cochlear implants (CIs) have provided some success in improving spatial hearing abilities to patients, but with large variability in performance. One reason for the variability is that there may be a mismatch in the place-of-stimulation arising from electrode arrays being inserted at different depths in each cochlea. Goupell et al. [(2013b). J. Acoust. Soc. Am. 133(4), [2272][2273][2274][2275][2276][2277][2278][2279][2280][2281][2282][2283][2284][2285][2286][2287] showed that increasing interaural mi… Show more

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Cited by 149 publications
(272 citation statements)
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References 38 publications
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“…By varying stimulus duration with carrier frequency, a constant "cochlear bandwidth" of ϳ3 mm (Ϯ1.5 mm), simulating the estimated average spread of excitation along the cochlea for a single electrode, can be maintained (cf. Goupell et al 2013;Kan et al 2013). While Gabor clicks provide a reasonable acoustic simulation of the CI pulsatile stimuli in terms of bandwidth, their comparability to CI stimuli is limited by their duration: At 4-kHz center frequency, the duration of a single pulse is nearly two orders of magnitude greater than the duration of a CI electrical pulse.…”
Section: Nh Stimuli and Proceduresmentioning
confidence: 99%
See 1 more Smart Citation
“…By varying stimulus duration with carrier frequency, a constant "cochlear bandwidth" of ϳ3 mm (Ϯ1.5 mm), simulating the estimated average spread of excitation along the cochlea for a single electrode, can be maintained (cf. Goupell et al 2013;Kan et al 2013). While Gabor clicks provide a reasonable acoustic simulation of the CI pulsatile stimuli in terms of bandwidth, their comparability to CI stimuli is limited by their duration: At 4-kHz center frequency, the duration of a single pulse is nearly two orders of magnitude greater than the duration of a CI electrical pulse.…”
Section: Nh Stimuli and Proceduresmentioning
confidence: 99%
“…1). Details of this procedure have been described in prior publications (e.g., Kan et al 2013). Briefly, left and right clinical processors were replaced with left and right custom research processors [synchronized L34 processors in conjunction with Nucleus Implant Communicator (NIC), Cochlear, Centennial, CO], which were directly controlled by a personal computer.…”
Section: Stimuli and Proceduresmentioning
confidence: 99%
“…Pitch-matched pairs of electrodes were tested in these experiments, which often maximize sensitivity to binaural cues in CI listeners (Long et al, 2003;Poon et al, 2009;Kan et al, 2013). Thus interaural place-of-stimulation mismatch may have also reduced binaural sensitivity in the CI listeners if the pitch matches did not fully compensate for interaural frequency mismatch.…”
Section: B Comparisons To Nh Performancementioning
confidence: 99%
“…Most bilateral cochlear implant (BiCI) users have shown improvements compared to their ability when only one CI was used. However, compared to normal hearing (NH) individuals, the average performance of BiCI users is still worse and has a large variability in performance amongst them (Majdak et al 2011;Litovsky et al 2012;Goupell et al 2013;Kan et al 2013). One likely reason for the worse performance of BiCI users is the interaural electrodes mismatch between two CIs because of different surgery insertion depth or different implant length.…”
Section: Introductionmentioning
confidence: 99%