The Effect of Temporal Gap Identification on Speech Perception by Users of Cochlear Implants Purpose This study examined the ability of listeners using cochlear implants (CIs) and listeners with normal hearing (NH) to identify silent gaps of different duration and the relation of this ability to speech understanding in CI users. Method Sixteen NH adults and 11 postlingually deafened adults with CIs ... Research Article
Research Article  |   April 01, 2009
The Effect of Temporal Gap Identification on Speech Perception by Users of Cochlear Implants
 
Author Affiliations & Notes
  • Elad Sagi
    New York University School of Medicine
  • Adam R. Kaiser
    Indiana University School of Medicine
  • Ted A. Meyer
    Medical University of South Carolina, Charleston
  • Mario A. Svirsky
    New York University School of Medicine
  • Contact author: Mario A. Svirsky, Department of Otolaryngology, New York University School of Medicine, New York, NY 10016. E-mail: Mario.Svirsky@NYUMC.org.
  • Adam R. Kaiser is presently an otolaryngologist with a private practice based in Fort Wayne, Indiana.
    Adam R. Kaiser is presently an otolaryngologist with a private practice based in Fort Wayne, Indiana.×
Article Information
Hearing & Speech Perception / Hearing Aids, Cochlear Implants & Assistive Technology / Hearing / Research Articles
Research Article   |   April 01, 2009
The Effect of Temporal Gap Identification on Speech Perception by Users of Cochlear Implants
Journal of Speech, Language, and Hearing Research, April 2009, Vol. 52, 385-395. doi:10.1044/1092-4388(2008/07-0219)
History: Received September 16, 2007 , Revised April 8, 2008 , Accepted August 11, 2008
 
Journal of Speech, Language, and Hearing Research, April 2009, Vol. 52, 385-395. doi:10.1044/1092-4388(2008/07-0219)
History: Received September 16, 2007; Revised April 8, 2008; Accepted August 11, 2008
Web of Science® Times Cited: 10

Purpose This study examined the ability of listeners using cochlear implants (CIs) and listeners with normal hearing (NH) to identify silent gaps of different duration and the relation of this ability to speech understanding in CI users.

Method Sixteen NH adults and 11 postlingually deafened adults with CIs identified synthetic vowel-like stimuli that were either continuous or contained an intervening silent gap ranging from 15 ms to 90 ms. Cumulative d', an index of discriminability, was calculated for each participant. Consonant and consonant–nucleus–consonant (CNC) word identification tasks were administered to the CI group.

Results Overall, the ability to identify stimuli with gaps of different duration was better for the NH group than for the CI group. Seven CI users had cumulative d' scores that were no higher than those of any NH listener, and their CNC word scores ranged from 0% to 30%. The other 4 CI users had cumulative d' scores within the range of the NH group, and their CNC word scores ranged from 46% to 68%. For the CI group, cumulative d' scores were significantly correlated with their speech testing scores.

Conclusions The ability to identify silent gap duration may help explain individual differences in speech perception by CI users.

Acknowledgments
This research was supported by Grants R01-DC003937 (PI: Mario A. Svirsky) and T32-DC000012 (PI: David B. Pisoni) from the National Institute on Deafness and Other Communication Disorders. We express thanks to Advanced Bionics Corporation for providing us with a Clarion 1.2 “implant in a box” and to Norbert Dillier from the ENT Department at University Hospital, Zürich, Switzerland, for providing a copy of sCILab software.
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