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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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Published on: March 24, 2023

Sequential bilateral cochlear implantation: speech perception and localization pre- and post-second cochlear

Camille C Dunn1, Richard S Tyler, Shelley Witt

  • 1University of Iowa, Iowa City, IA, USA. camille-dunn@uiowa.edu

American Journal of Audiology
|August 1, 2012
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Summary

Bilateral cochlear implants (CI) significantly improve speech perception in noise and sound localization compared to unilateral CI. The duration of deafness or time between surgeries did not impact these benefits in this study.

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Area of Science:

  • Audiology
  • Neuroscience
  • Biomedical Engineering

Background:

  • Hearing loss significantly impacts communication.
  • Cochlear implants (CI) restore hearing for severe to profound sensorineural hearing loss.
  • Bilateral CI aims to improve sound localization and speech understanding in noise.

Purpose of the Study:

  • Compare speech perception and localization in unilateral cochlear implant (CI) users versus bilateral CI users.
  • Evaluate the impact of time between surgeries and duration of deafness on outcomes.

Main Methods:

  • Speech perception in quiet and noise was tested in 9 subjects.
  • Sound localization in noise was assessed in 13 subjects.
  • All subjects were tested with unilateral CI and then bilateral CI after 3 months.

Main Results:

  • Bilateral CI showed no significant difference in speech perception in quiet compared to unilateral CI.
  • Bilateral CI significantly improved speech perception in noise and sound localization.
  • No significant correlation was found between outcomes and duration of deafness or time between surgeries.

Conclusions:

  • Bilateral CI enhances speech perception in noise and sound localization.
  • Further research with larger cohorts is needed to confirm the impact of duration of deafness and time between surgeries.