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Related Experiment Videos

Phoneme recognition and confusions with multichannel cochlear implants: consonants.

Taina T Välimaa1, Taisto K Määttä, Heikki J Löppönen

  • 1Department of Finnish, Saami and Logopedics University of Oulu. taina.valimaa@oulu.fi

Journal of Speech, Language, and Hearing Research : JSLHR
|October 17, 2002
PubMed
Summary

Postlingually hearing-impaired adults showed significant consonant recognition improvement with multichannel cochlear implants. Successful adaptation to electrical hearing was observed, with specific consonant sounds being easier to discern.

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Area of Science:

  • Audiology
  • Neuroscience
  • Speech Science

Background:

  • Severe to profound hearing impairment affects consonant recognition.
  • Multichannel cochlear implants (MCIs) offer a potential solution for restoring auditory function.
  • Understanding consonant relearning post-implantation is crucial for auditory rehabilitation.

Purpose of the Study:

  • To investigate consonant recognition in postlingually hearing-impaired adults after receiving MCIs.
  • To assess the time course and factors influencing consonant perception.
  • To analyze phonemic errors and identify specific consonant confusions.

Main Methods:

  • Prospective repeated-measure design with 19 Finnish-speaking subjects.
  • Open-set nonsense-syllable test administered for 6 to 24 months post-MCI activation.

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  • Analysis of phoneme errors, correct response proportions, and 95% confidence intervals.

    • Main Results:

    • Mean consonant recognition reached 71% two years post-activation.
    • Manner of articulation was more easily classified than place of articulation.
    • Consonants with high F2 transitions (alveolar, palatal, velar) were recognized better than those with low F2 transitions (labial).

    Conclusions:

    • Successful adaptation to electrical hearing with MCIs was demonstrated.
    • Consonant recognition is influenced by acoustic features, particularly F2 transition locus.
    • Specific consonant confusion patterns were identified, aiding in understanding auditory processing post-implantation.