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Predicting vocal frequency from selected physiologic measures.

T Shipp, E T Doherty, P Morrissey

    The Journal of the Acoustical Society of America
    |September 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

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    Cricothyroid muscle activity is the primary predictor of voice frequency changes across the modal-to-falsetto range in adult males. Other measures like air pressure and laryngeal position play minor roles.

    Area of Science:

    • Laryngology
    • Acoustic phonetics
    • Voice science

    Background:

    • Understanding voice production mechanisms is crucial for diagnosing and treating voice disorders.
    • The modal and falsetto voice registers involve distinct laryngeal adjustments.

    Purpose of the Study:

    • To identify the key physiological predictors of voice frequency variation.
    • To determine the contribution of cricothyroid muscle activity, subglottal air pressure, thyroarytenoid muscle activity, and laryngeal position to voice frequency control.

    Main Methods:

    • Simultaneous physiological measures were recorded from four adult males during phonation across seven frequencies.
    • Multiple regression analysis was employed to assess the predictive power of each measure on voice frequency.

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    Main Results:

    • Cricothyroid muscle activity was the strongest predictor of voice frequency across the modal-to-falsetto range.
    • Subglottal air pressure and thyroarytenoid muscle activity collectively explained only an additional 4% of the variance.
    • Vertical laryngeal position was significant for only one subject.

    Conclusions:

    • Cricothyroid muscle activity is the dominant factor in controlling voice frequency shifts.
    • Models using individual subject data achieved higher predictive accuracy (90-94%) compared to pooled data (67-73%).