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Related Experiment Videos

Speech intelligibility of implanted children

A M Robbins1, K I Kirk, M J Osberger

  • 1Department of Otolaryngology-Head and Neck Surgery, Indiana University School of Medicine, Indianapolis, USA.

The Annals of Otology, Rhinology & Laryngology. Supplement
|September 1, 1995
PubMed
Summary

Cochlear implants (CI) gradually improve speech intelligibility in deaf children, eventually surpassing some hearing aid (HA) users. However, HA users with better unaided thresholds maintained superior intelligibility long-term.

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Area of Science:

  • Audiology
  • Speech-Language Pathology
  • Biomedical Engineering

Background:

  • Prelingual deafness significantly impacts speech development.
  • Conventional hearing aids (HAs) offer varying degrees of benefit.
  • Multichannel cochlear implants (CIs) represent an advanced auditory prosthetic option.

Purpose of the Study:

  • To compare the speech intelligibility of prelingually deaf children using CIs with those using HAs.
  • To track the longitudinal changes in speech intelligibility for CI users.
  • To evaluate the impact of unaided hearing thresholds on outcomes for both HA and CI users.

Main Methods:

  • Speech intelligibility was assessed in 61 prelingually deaf children before and after CI implantation.
  • CI users' intelligibility was compared to three HA user groups (gold, silver, bronze) based on pure tone average (PTA).

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  • Intelligibility was quantified by the percentage of correctly understood words from a 10-sentence set.

    • Main Results:

    • CI users showed gradual speech intelligibility improvement over time.
    • CI intelligibility remained low for the first 2 years post-implantation.
    • After 2 years, CI users' intelligibility surpassed that of silver HA users.
    • Gold HA users consistently demonstrated significantly better speech intelligibility than CI users, even after 3.5 years.

    Conclusions:

    • Multichannel cochlear implantation leads to progressive speech intelligibility gains in prelingually deaf children.
    • While CIs can eventually outperform some conventional HA users, individuals with better unaided hearing thresholds using HAs may achieve higher intelligibility.
    • The findings highlight the importance of considering baseline hearing levels when comparing auditory rehabilitation strategies.