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Speech perception by four single-channel cochlear implant users.

L J Dent1, F B Simmons, R L White

  • 1Stanford University School of Medicine, Division of Otolaryngology/Head & Neck Surgery, CA 94305.

Journal of Speech and Hearing Research
|December 1, 1987
PubMed
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Cochlear implants enhance speechreading for profoundly deaf adults, acting as a sensory supplement. However, they did not replace natural hearing abilities for any participant.

Area of Science:

  • Audiology
  • Neuroscience
  • Biomedical Engineering

Background:

  • Profoundly deaf adults often receive cochlear implants to restore auditory function.
  • Scala tympani implants are a type of cochlear implant surgery.
  • Evaluating the efficacy of auditory prostheses is crucial for patient outcomes.

Purpose of the Study:

  • To assess the speech comprehension of profoundly deaf adults with scala tympani implants.
  • To compare auditory and auditory-visual speech recognition before and after implantation.
  • To determine if a single-channel sound processor functions as a sensory supplement or substitute.

Main Methods:

  • Four profoundly deaf adults with scala tympani implants participated.
  • Subjects underwent auditory and auditory-visual speech comprehension tests.

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  • Speech recognition was evaluated preoperatively with hearing aids and postoperatively with a single-channel sound processor.

    • Main Results:

    • No significant difference in listening tests between pre- and post-implant scores.
    • All subjects showed improved identification of medial consonants and 2-digit numerals with auditory stimulation during speechreading.
    • Frequent users of the single-channel processor demonstrated significant improvements in connected-discourse tracking and sentence recognition.

    Conclusions:

    • Single-channel sound processors can function as a sensory supplement for speechreading enhancement in cochlear implant users.
    • No participant could use the processor as a complete sensory substitute for hearing.
    • Individual usage patterns significantly impact the benefits derived from cochlear implant sound processors.