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[Cochlear Implantation in Single-Sided Deafness - Six Years of Follow-Up from Diagnosis and Consistent Use, Through Dedicated and Creative Auditory Learning, to the Development of Bilateral Central Processing Abilities].

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Related Experiment Video

Updated: Dec 15, 2025

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages

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Phoneme recognition in bimodal hearing.

Talma Shpak1, Tova Most2, Michal Luntz3,4

  • 1The Ear and Hearing Program, Department of Otolaryngology - Head and Neck Surgery, Bnai-Zion Medical Center, Haifa, Israel.

Acta Oto-Laryngologica
|July 10, 2020
PubMed
Summary

Unilateral cochlear implant (CI) users benefit from contralateral hearing aids (HA). Bimodal hearing with a CI and HA improves phonetic perception, especially with better low-frequency hearing in the HA ear.

Keywords:
Bimodalitycochlear implanthearing aidslanguages specific fittingphonetic features perception

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Area of Science:

  • Audiology
  • Neuroscience
  • Speech and Hearing Sciences

Background:

  • Many individuals with unilateral cochlear implants (CI) retain residual hearing in the non-implanted ear, enabling bimodal hearing.
  • Assessing the contribution of hearing aids (HA) in the non-implanted ear is crucial for optimizing auditory rehabilitation.

Purpose of the Study:

  • To evaluate the impact of a contralateral HA on phonetic feature perception in unilateral CI users with severe-profound hearing loss (HL) in the non-implanted ear.
  • To understand how bimodal hearing enhances speech recognition in this population.

Main Methods:

  • A monosyllabic word test in noise was administered to 29 adult bimodal users.
  • Participants had severe-profound HL and minimal speech recognition with HA alone in the non-implanted ear.

Main Results:

  • Phonetic feature perception (consonants and vowels) was significantly better in the bimodal condition compared to the CI-alone condition.
  • Improved low-frequency hearing thresholds in the HA ear correlated positively with enhanced phonetic feature perception in bimodal listening.

Conclusions:

  • Unilateral CI users with minimal HA benefit extract and integrate low-frequency information from the HA with input from the CI.
  • Contralateral HAs are recommended for unilateral CI users, particularly when contralateral implantation is not feasible.
  • The study suggests methods for monitoring the benefits of HA use in bimodal hearing configurations.