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Auditory stimulation, rhythm, and stuttering.

R R Martin, L J Johnson, G M Siegel

    Journal of Speech and Hearing Research
    |December 1, 1985
    PubMed
    Summary
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    Adult stutterers reduced stuttering with amplified sidetone only after speaking in loud noise. This suggests a "sensitization" effect, where prior noise exposure enhances stuttering reduction with modified auditory feedback.

    Area of Science:

    • Speech-language pathology
    • Auditory feedback research
    • Stuttering treatment

    Background:

    • Previous research indicated stutterers reduce stuttering under amplified sidetone, but only if preceded by noise.
    • The "sensitization" hypothesis proposed initial noise exposure makes stutterers more responsive to reduced stuttering with modified auditory feedback.

    Purpose of the Study:

    • To test the "sensitization" hypothesis regarding stuttering reduction.
    • To investigate the effects of noise and amplified sidetone on stuttering frequency and vocal intensity.

    Main Methods:

    • 24 adult stutterers were divided into three groups with varying auditory stimulation sequences.
    • Sequences included quiet, loud white noise (100 dB SPL), amplified sidetone, and rhythmic stimulation.
    • Stuttering frequency and vocal intensity were measured relative to baseline quiet conditions.

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    Main Results:

    • Stutterers increased vocal intensity in noise and decreased it during amplified sidetone.
    • Stuttering frequency decreased in loud noise and with amplified sidetone.
    • Reduced stuttering during amplified sidetone occurred only when it followed the loud noise condition.

    Conclusions:

    • Results support the "sensitization" hypothesis.
    • Prior exposure to loud noise enhances the stuttering reduction effect of amplified sidetone.
    • Auditory feedback modification effectiveness in stuttering may depend on preceding acoustic conditions.