Binaural hearing advantages for children with bimodal fitting
Younes Lotfi1, Mahdieh Hasanalifard1, Abdollah Moossavi2
1Department of Audiology, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
International Journal of Pediatric Otorhinolaryngology
|March 16, 2019
Summary
Children with cochlear implants (CI) and residual hearing benefit from bimodal fitting (BF). This study measured binaural advantages like head shadow effect (HSE), binaural squelch effect (BSQ), and binaural summation effect (BSU), showing improved speech perception in noise (SPiN).
Area of Science:
- Audiology and Hearing Science
- Pediatric Otolaryngology
- Biomedical Engineering
Background:
- Bimodal fitting (BF) leverages binaural hearing advantages for individuals with cochlear implants (CI).
- Key binaural advantages include head shadow effect (HSE), binaural squelch effect (BSQ), and binaural summation effect (BSU).
- Understanding these benefits is crucial for optimizing hearing function in children with long-standing CI use and contralateral residual hearing.
Purpose of the Study:
- To quantify the auditory benefits of bimodal stimulation in pediatric CI users with residual hearing.
- To measure specific binaural advantages (HSE, BSQ, BSU) under bimodal fitting conditions.
- To compare speech perception in noise (SPiN) scores with CI alone versus bimodal fitting.
Main Methods:
- A cross-sectional study involving 24 children (8-12 years) with unilateral CI and contralateral residual hearing.
- Participants continuously used bimodal fitting (BF) at a specialized CI center.
- Speech perception in noise (SPiN) scores were measured under various listening and noise conditions to determine the contribution of each binaural advantage.
Main Results:
- Bimodal fitting significantly improved speech perception in noise (SPiN) compared to using the cochlear implant alone.
- The mean improvement in SPiN scores attributed to head shadow effect (HSE) was 3.13 dB.
- Binaural squelch effect (BSQ) and binaural summation effect (BSU) resulted in SPiN improvements of 1.42 dB and 2.04 dB, respectively.
Conclusions:
- Children with unilateral cochlear implants and residual hearing demonstrate significant benefits from bimodal fitting.
- The study confirms that binaural advantages enhance speech perception in noise for this population.
- Using a hearing aid in the unaided ear alongside a cochlear implant optimizes binaural benefits and SPiN.
Keywords:
Bimodal fittingBinaural hearingBinaural squelch effectBinaural summation effectCochlear implantHead shadow effectMore Related Videos
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