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Related Experiment Videos

Three-month results with bilateral cochlear implants.

Richard S Tyler1, Bruce J Gantz, Jay T Rubinstein

  • 1Department of Otolaryngology-Head & Neck Surgery, The University of Iowa, Iowa City 52242-1078, USA.

Ear and Hearing
|March 9, 2002
PubMed
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Bilateral cochlear implants offer significant speech understanding and localization benefits for adults with post-lingual deafness. Utilizing both implants, especially with noise to one side, enhances auditory perception and spatial awareness.

Area of Science:

  • Audiology
  • Neuroscience
  • Biomedical Engineering

Background:

  • Bilateral cochlear implantation (CI) is increasingly common for post-lingually deafened adults.
  • Understanding the specific benefits of binaural hearing with two independent CIs is crucial for optimizing patient outcomes.
  • Previous research has explored binaural advantages, but specific performance metrics with independent CIs require further investigation.

Purpose of the Study:

  • To evaluate the advantages of binaural listening with two cochlear implants (CIs) in post-lingually deafened adults.
  • To assess improvements in speech perception in quiet and noise conditions.
  • To determine the impact of bilateral CIs on sound localization abilities.

Main Methods:

  • Nine post-lingually deafened adults with bilateral CIs (Cochlear Corporation CI24M) participated.

Related Experiment Videos

  • Speech materials (words and sentences) were presented in quiet and noise (front or side).
  • Sound localization of broadband noise at 45 degrees azimuth was assessed for each ear and both ears.

    • Main Results:

    • Binaural listening provided a significant advantage over the better ear in speech testing for some subjects in quiet and noise.
    • When noise was presented to one side, binaural listening (utilizing the ear away from the noise) significantly improved speech perception in all tested subjects.
    • Localization ability was significantly better with bilateral CIs compared to single-ear performance for most subjects.

    Conclusions:

    • Bilateral cochlear implants offer tangible benefits for speech understanding, particularly in noisy environments by leveraging the head shadow effect.
    • Bilateral CIs enhance sound localization capabilities compared to single-ear devices.
    • These findings support the efficacy of bilateral cochlear implantation for improving auditory function in post-lingually deafened adults.