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Stuttering and speech naturalness.

R R Martin, S K Haroldson, K A Triden

    The Journal of Speech and Hearing Disorders
    |February 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

    This study developed a speech naturalness scale. Results show stuttering and delayed auditory feedback (DAF) speech sound equally unnatural, both less natural than typical speech.

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    Area of Science:

    • Speech-Language Pathology
    • Psycholinguistics
    • Acoustic Phonetics

    Background:

    • Stuttering significantly impacts speech naturalness.
    • Delayed auditory feedback (DAF) can induce stutter-free speech in some individuals.
    • Objective and subjective measures are crucial for evaluating speech quality.

    Purpose of the Study:

    • To develop and validate a reliable scale for assessing speech naturalness.
    • To compare the naturalness of typical stuttered speech, DAF-induced stutter-free speech, and normal non-stuttered speech.
    • To investigate listener perception of speech naturalness across different conditions.

    Main Methods:

    • Development of a 9-point rating scale for speech naturalness.
    • Recording speech samples from 10 stutterers, 10 stutterers under 250-ms DAF, and 10 non-stutterers.

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  • Perceptual evaluation of 300 speech samples by 30 listeners.

    • Main Results:

    • Stuttered speech was perceived as significantly less natural than non-stuttered speech.
    • DAF-induced stutter-free speech was also perceived as significantly less natural than non-stuttered speech.
    • No significant difference in perceived naturalness was found between stuttered speech and DAF-induced stutter-free speech.

    Conclusions:

    • The developed scale effectively differentiates speech naturalness.
    • Both stuttering and DAF-induced fluency alter speech naturalness negatively.
    • Listener judgments provide reliable data for speech naturalness evaluation.