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Glottal source-vocal tract interaction.

T Koizumi, S Taniguchi, S Hiromitsu

    The Journal of the Acoustical Society of America
    |November 1, 1985
    PubMed
    Summary
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    This study explores glottal source-vocal tract interaction, revealing how the first formant influences glottal volume flow waveforms. The research provides insights into vocal fold dynamics and airflow patterns.

    Area of Science:

    • Acoustic phonetics
    • Bioacoustics
    • Speech science

    Background:

    • Understanding glottal source-vocal tract interaction is crucial for speech production models.
    • The influence of acoustic loads on glottal airflow dynamics requires further investigation.

    Purpose of the Study:

    • To investigate the effect of the first formant load on glottal volume flow waveforms.
    • To model the interaction between the glottal source and the vocal tract.
    • To explore applications in estimating glottal area function.

    Main Methods:

    • Solving a nonlinear differential equation to model pressure drop across the first formant load.
    • Calculating glottal volume flow under supraglottal and subglottal formant loads.

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    Main Results:

    • The first formant load significantly affects the waveform of glottal volume flow.
    • Quantified glottal volume flow variations due to different formant loads.
    • Developed a theoretical framework for analyzing glottal source-vocal tract coupling.

    Conclusions:

    • The study provides a theoretical basis for understanding glottal source-vocal tract interaction.
    • The findings have implications for speech synthesis and voice analysis.
    • The developed theory can be applied to estimate the glottal area function.