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Corrective binaural processing for bilateral cochlear implant patients

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  • Christopher A Brown

Abstract

Although bilateral cochlear implant users receive input to both ears, they nonetheless have relatively poor localization abilities in the horizontal plane. This is likely because of the two binaural cues, they have good sensitivity to interaural differences of level (inter-aural level differences, or ILDs), but not those of time (inter-aural time differences; ITDs). Here, localization performance is assessed in six bilateral cochlear implant patients when instantaneous ITDs are measured and converted to ILDs, a strategy that results in larger-than-typical ILDs. The added ILDs are corrective, in that they are derived from individual listener performance across both frequency and azimuth, so that they are small where a listener performs well, and increase as performance deviates from ideal. Results show significantly improved localization performance as a result of this strategy, with two of the six listeners achieving levels of performance typically observed in NH listeners.

Suggested Citation

  • Christopher A Brown, 2018. "Corrective binaural processing for bilateral cochlear implant patients," PLOS ONE, Public Library of Science, vol. 13(1), pages 1-18, January.
    • Handle: RePEc:plo:pone00:0187965
    DOI: 10.1371/journal.pone.0187965
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