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Related Experiment Videos

Pulsatile airflow during phonation: an excised larynx model

F Alipour1, R C Scherer

  • 1Department of Speech Pathology and Audiology, University of Iowa, Iowa City 52242-1012.

The Journal of the Acoustical Society of America
|February 1, 1995
PubMed
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This study reveals complex, non-uniform airflow patterns within the larynx during phonation. Understanding these pulsatile airflow dynamics is crucial for voice production research.

Area of Science:

  • Biomedical Engineering
  • Acoustic Science
  • Laryngology

Background:

  • Pulsatile airflow is fundamental to phonation.
  • Laryngeal muscle function significantly impacts airflow dynamics.

Purpose of the Study:

  • To investigate pulsatile airflow patterns in an excised larynx.
  • To correlate airflow with laryngeal conditions and muscle function.

Main Methods:

  • Utilized canine larynges mounted on a bench.
  • Simultaneously recorded air velocity, subglottal pressure, volume flow, and electroglottograph signals.
  • Employed hot-wire anemometry for air velocity measurements in a controlled airflow environment.

Main Results:

  • Supraglottal air velocity demonstrated high spatial and temporal dependence.

Related Experiment Videos

  • Observed cycles of local air velocity with double peaks.
  • Phase-averaged velocity mapping revealed non-uniform airflow surfaces, with higher velocities anteriorly.

    • Conclusions:

    • Laryngeal airflow is complex and varies significantly across the glottis and over the phonation cycle.
    • These findings provide insights into the fluid dynamics of voice production.