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Related Experiment Videos

[Quantitative analysis of vocal fold vibration].

C Wei1, W Wang, X Chen

  • 1Department of Otolaryngology, EENT Hospital, Shanghai Medical University, Shanghai 200031.

Lin Chuang Er Bi Yan Hou Ke Za Zhi = Journal of Clinical Otorhinolaryngology
|February 5, 2003
PubMed
Summary

Quantitative measures of vocal fold vibration reveal that vocal fold closure duration varies with intensity and gender. Increased frequency lengthens the open phase, while increased intensity shortens it.

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Area of Science:

  • Laryngology
  • Acoustic analysis
  • Biomechanics of phonation

Context:

  • Understanding vocal fold dynamics is crucial for diagnosing voice disorders.
  • Traditional methods for measuring vocal fold vibration have limitations.

Purpose:

  • To quantitatively measure vocal fold vibration using a novel computerized image analysis technique.
  • To investigate the impact of gender, pitch (frequency), and loudness (intensity) on vocal fold vibration parameters.

Summary:

  • A new computerized image analysis technique and electroglottography (EGG) were employed in 60 healthy speakers.
  • Vocal fold vibration parameters, including open quotient (OQ) and closing quotient (CQ), were analyzed.
  • Results indicated that higher frequencies increased OQ (longer open phase) and decreased CQ.

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  • Increased intensity shortened the open phase and significantly reduced the closing phase duration.
  • Males exhibited a longer closed phase compared to females, with closing duration generally shorter than opening duration.

    • Impact:

    • Demonstrates the feasibility of quantitative vocal fold vibration analysis with modern technology.
    • Highlights specific vocal fold vibration features that are sensitive to changes in intensity, frequency, and gender.
    • Provides objective data for understanding normal voice production and potential voice pathologies.