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Effects of extreme tonotopic mismatches between bilateral cochlear implants on electric pitch perception: A case study
Journal article   Peer reviewed

Effects of extreme tonotopic mismatches between bilateral cochlear implants on electric pitch perception: A case study

Lina A.J Reiss, Mary W Lowder, Sue A Karsten, Christopher W Turner and Bruce J Gantz
Ear and hearing, Vol.32(4), pp.536-540
2011
DOI: 10.1097/AUD.0b013e31820c81b0
PMCID: PMC3120897
PMID: 21307775
url
https://www.ncbi.nlm.nih.gov/pmc/articles/3120897View
Open Access

Abstract

Pitch perception was studied in a subject with a 10-mm cochlear implant (CI) in one ear and a 24-mm CI in the other ear. Both processors were programmed to allocate information from the same frequency range of 188-7938 Hz, despite the large differences in putative insertion depth and stimulated cochlear locations between the CIs. After 2 and 3 years of experience, pitch-matched electrode pairs between CIs were aligned closer to the processor-provided frequencies than to cochlear position. This finding suggests that pitch perception may have adapted to reduce perceived spectral discrepancies between bilateral CI inputs, despite 2-3 octave differences in tonotopic mapping.

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