Effects of Removing Low-Frequency Electric Information on Speech Perception With Bimodal Hearing Purpose The objective was to determine whether speech perception could be improved for bimodal listeners (those using a cochlear implant [CI] in one ear and hearing aid in the contralateral ear) by removing low-frequency information provided by the CI, thereby reducing acoustic–electric overlap. Method Subjects were adult CI ... Research Article
Research Article  |   February 01, 2016
Effects of Removing Low-Frequency Electric Information on Speech Perception With Bimodal Hearing
 
Author Affiliations & Notes
  • Jennifer R. Fowler
    Oregon Health and Science University, Portland
  • Jessica L. Eggleston
    Oregon Health and Science University, Portland
  • Kelly M. Reavis
    National Center for Rehabilitative Auditory Research, VA Rehabilitation Research & Development, Portland, OR
  • Garnett P. McMillan
    National Center for Rehabilitative Auditory Research, VA Rehabilitation Research & Development, Portland, OR
  • Lina A. J. Reiss
    Oregon Health and Science University, Portland
  • Disclosure: The authors have declared that no competing interests existed at the time of publication.
    Disclosure: The authors have declared that no competing interests existed at the time of publication. ×
  • Correspondence to Jennifer R. Fowler: fowlejen@ohsu.edu
  • Editor: Nancy Tye-Murray
    Editor: Nancy Tye-Murray×
  • Associate Editor: Richard Dowell
    Associate Editor: Richard Dowell×
Article Information
Hearing & Speech Perception / Acoustics / Hearing Aids, Cochlear Implants & Assistive Technology / Hearing / Research Articles
Research Article   |   February 01, 2016
Effects of Removing Low-Frequency Electric Information on Speech Perception With Bimodal Hearing
Journal of Speech, Language, and Hearing Research, February 2016, Vol. 59, 99-109. doi:10.1044/2015_JSLHR-H-15-0247
History: Received July 15, 2015 , Revised September 3, 2015 , Accepted October 6, 2015
 
Journal of Speech, Language, and Hearing Research, February 2016, Vol. 59, 99-109. doi:10.1044/2015_JSLHR-H-15-0247
History: Received July 15, 2015; Revised September 3, 2015; Accepted October 6, 2015
Web of Science® Times Cited: 1

Purpose The objective was to determine whether speech perception could be improved for bimodal listeners (those using a cochlear implant [CI] in one ear and hearing aid in the contralateral ear) by removing low-frequency information provided by the CI, thereby reducing acoustic–electric overlap.

Method Subjects were adult CI subjects with at least 1 year of CI experience. Nine subjects were evaluated in the CI-only condition (control condition), and 26 subjects were evaluated in the bimodal condition. CIs were programmed with 4 experimental programs in which the low cutoff frequency (LCF) was progressively raised. Speech perception was evaluated using Consonant-Nucleus-Consonant words in quiet, AzBio sentences in background babble, and spondee words in background babble.

Results The CI-only group showed decreased speech perception in both quiet and noise as the LCF was raised. Bimodal subjects with better hearing in the hearing aid ear (< 60 dB HL at 250 and 500 Hz) performed best for words in quiet as the LCF was raised. In contrast, bimodal subjects with worse hearing (> 60 dB HL at 250 and 500 Hz) performed similarly to the CI-only group.

Conclusions These findings suggest that reducing low-frequency overlap of the CI and contralateral hearing aid may improve performance in quiet for some bimodal listeners with better hearing.

Acknowledgments
This research was funded by the Medical Research Foundation of Oregon (Lina A. J. Reiss) and by a National Institute on Deafness and Other Communication Disorders Grant 5P30DC010755 (Paul Flint and Lina A. J. Reiss). We also thank Gem Stark for assistance with data analysis and Yonghee Oh for helpful comments on the article. Research equipment was provided by Cochlear (Sydney, Australia) and MED-EL (Innsbruck, Austria).
Order a Subscription
Pay Per View
Entire Journal of Speech, Language, and Hearing Research content & archive
24-hour access
This Article
24-hour access