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Speech perception by profoundly hearing-impaired children.

N P Erber

    The Journal of Speech and Hearing Disorders
    |August 1, 1979
    PubMed
    Summary

    Defining profound hearing impairment requires more than pure-tone audiograms. Children with profound hearing loss rely on intensity variations and visual cues for speech perception, necessitating tailored educational strategies and sensory aids.

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    Area of Science:

    • Audiology
    • Speech-Language Pathology
    • Educational Psychology

    Background:

    • Traditional definitions of profound hearing impairment based solely on pure-tone audiograms are insufficient.
    • Children with severe hearing loss often struggle with spectral speech features.

    Purpose of the Study:

    • To review the limitations of pure-tone audiograms for defining profound hearing impairment.
    • To explore alternative acoustic and visual cues for speech perception in profoundly hearing-impaired children.
    • To discuss instructional strategies and sensory aids for improving speech perception.

    Main Methods:

    • Review of existing literature on hearing impairment definitions and speech perception.
    • Analysis of acoustic cues (intensity variations, waveform envelope) available to hearing-impaired individuals.
    • Exploration of visual (lipreading) and combined auditory-visual speech perception.
    • Discussion of articulatory and language factors influencing speech intelligibility.

    Main Results:

    • Profound hearing impairment is better characterized by poor spectral feature discrimination and reliance on gross intensity variations.
    • Optical analogs demonstrate available pattern cues for vowel/consonant identification and prosody perception.
    • Lipreading and combined modalities enhance speech perception, influenced by articulatory and language factors.

    Conclusions:

    • Pure-tone audiograms alone do not fully capture the challenges of profound hearing impairment.
    • Understanding available acoustic and visual cues is crucial for effective speech perception strategies.
    • Educational interventions and sensory aids can significantly improve speech perception abilities in profoundly hearing-impaired children.

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