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Updated: Dec 15, 2025

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
Published on: March 24, 2023
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.
Background:
Many unilateral cochlear implant (CI) users have residual hearing in the nonimplanted ear, allowing them to use bimodal hearing. Assessing the hearing aid (HA) contribution is important.
Objective:
To examine the contribution of a contralateral HA in unilateral CI users with severe-profound hearing loss (HL) in the non-implanted ear to phonetic features perception.Participants and method: Monosyllabic word test in noise was used to assess the phonetic features perception in 29 adult bimodal users with severe-profound HL and only minimal speech recognition using HA alone in the nonimplanted ear.
Results:
For all consonants and vowel features, participants scored better in the bimodal condition than in the CI-alone condition. Better low frequencies thresholds in the HA ear correlated with better perception of phonetic features in the bimodal condition.
Conclusion:
CI/HA users with only minimal speech recognition using HA alone in the nonimplanted ear extract low-frequency information provided by the HA ear and combine it with information coming from the implanted ear.Significance: The results of the study provide a reasoning for unilateral CI users to insist on using a contralateral HA as long as contralateral implantation is not performed, and suggest how to monitor the benefit derived from the HA.
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