Effect of Channel Envelope Synchrony on Interaural Time Difference Sensitivity in Bilateral Cochlear Implant Listeners

Ear and Hearing
Tom FrancartJan Wouters

Abstract

For a periodic acoustic input signal, the channel envelopes coded by current bilateral cochlear implant sound processors can be asynchronous. The effect of this asynchrony on sensitivity to interaural time differences (ITDs) was assessed. ITD sensitivity was measured in six bilateral cochlear implant listeners for single- and three-electrode stimuli. The three-electrode stimuli contained envelope modulations, either synchronous or asynchronous across electrodes, with delays of 1.25 up to 5.00 ms. Each individual electrode carried the same ITD. Either neighboring electrodes were chosen or a separation of four electrodes to investigate the effect of electrode distance. With synchronous envelopes, no difference in ITD sensitivity was found among single-electrode, adjacent three-electrode, and spaced three-electrode stimuli. A decrease in ITD sensitivity was found with increasing across-channel envelope asynchrony, which was consistent with the use of the across-electrode aggregate stimulation pattern rather than individual information channels for ITDs. No consistent effect of electrode separation was found. While the binaural system was resilient to small delays between envelopes, larger delays significantly deceased ITD sensitiv...Continue Reading

References

Dec 1, 1991·The Journal of the Acoustical Society of America·T N BuellL R Bernstein
Aug 27, 1999·The Journal of the Acoustical Society of America·C M McKay, H J McDermott
Mar 27, 2003·The Journal of the Acoustical Society of America·Richard J M van Hoesel, Richard S Tyler
May 3, 2007·The Journal of the Acoustical Society of America·Richard J M van Hoesel
Feb 6, 2008·The Journal of the Acoustical Society of America·Bernhard U Seeber, Hugo Fastl
Jun 11, 2009·Journal of the Association for Research in Otolaryngology : JARO·Richard J M van HoeselRuth Y Litovsky
Jan 12, 2010·The Journal of the Acoustical Society of America·Ruth Y LitovskyRichard van Hoesel
Nov 23, 2011·International Journal of Audiology·Erin C SchaferSybil Verret
Apr 6, 2013·The Journal of the Acoustical Society of America·Victor A Noel, Donald K Eddington
Jan 15, 2014·Journal of the Association for Research in Otolaryngology : JARO·Robert H Pierzycki, Bernhard U Seeber

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Citations

Sep 18, 2015·Journal of the Association for Research in Otolaryngology : JARO·Katharina EggerBernhard Laback
Jan 3, 2016·The Journal of the Acoustical Society of America·Alan KanRuth Y Litovsky
Apr 2, 2018·The Journal of the Acoustical Society of America·Tanvi ThakkarRuth Y Litovsky
Dec 3, 2016·The Journal of the Acoustical Society of America·Alan KanRuth Y Litovsky
Sep 3, 2020·The Journal of the Acoustical Society of America·Benjamin DieudonnéTom Francart
Jan 1, 2021·The Journal of the Acoustical Society of America·Hongde WuDingchang Zheng

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