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Bimodal fitting or bilateral implantation?

Teresa Y C Ching1, Robyn Massie, Emma Van Wanrooy

  • 1National Acoustic Laboratories, Sydney, Australia. Teresa.Ching@nal.gov.au

Cochlear Implants International
|December 11, 2008
PubMed
Summary

Bimodal fitting and bilateral cochlear implants offer similar speech intelligibility benefits for children. Bimodal fitting uniquely enhances voice and music perception by combining acoustic and electric hearing cues.

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Area of Science:

  • Audiology
  • Neuroscience
  • Speech and Hearing Sciences

Background:

  • Unilateral cochlear implantation is common, but bilateral hearing strategies are increasingly explored.
  • Understanding the benefits of bimodal fitting (hearing aid + cochlear implant) and bilateral cochlear implantation is crucial for pediatric hearing rehabilitation.

Purpose of the Study:

  • To summarize findings on the benefits of bimodal fitting and bilateral cochlear implantation compared to unilateral implantation in children.
  • To evaluate speech intelligibility, voice and music perception, and speech-in-noise performance in these different hearing conditions.

Main Methods:

  • Review of studies evaluating bimodal fitting and bilateral cochlear implantation in children.
  • Comparison of outcomes with unilateral cochlear implantation.

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Main Results:

  • Bimodal fitting and bilateral cochlear implantation provided similar binaural speech intelligibility advantages.
  • Bimodal fitting enhanced voice and music perception by integrating low-frequency acoustic cues with high-frequency electric cues.
  • Some children with bilateral cochlear implants demonstrated improved speech-in-noise perception, potentially due to directional microphones and spatial cue utilization.

Conclusions:

  • Bilateral hearing, whether bimodal or bilateral cochlear implants, offers significant advantages over unilateral implantation for children.
  • The provision of hearing in both ears is supported as the standard of care.