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Related Experiment Videos

Mucosal wave: a normophonic study across visualization techniques.

Heather S Shaw1, Dimitar D Deliyski

  • 1Department of Communication Sciences and Disorders, University of South Carolina, Columbia, South Carolina 29208, USA. shawhs@gwm.sc.edu

Journal of Voice : Official Journal of the Voice Foundation
|October 4, 2006
PubMed
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Normophonic speakers often show variations in vocal fold mucosal wave magnitude and symmetry. Careful diagnosis is needed to avoid overdiagnosis, especially when using different visualization techniques.

Area of Science:

  • * Laryngology and Voice Science
  • * Biomedical Imaging and Signal Processing

Background:

  • * Accurate visualization of vocal fold vibration is critical for diagnosing voice disorders.
  • * Recent observations suggest increased variability in vocal fold mucosal wave features among individuals with normal voices.

Purpose of the Study:

  • * To assess variations in mucosal wave magnitude and symmetry in normophonic individuals.
  • * To compare findings using standard and novel visualization techniques.
  • * To examine differences between modal and pressed phonation types.

Main Methods:

  • * Correlational design utilizing a multiple baseline approach across visualization methods.
  • * Analysis of vocal fold mucosal wave presence, magnitude, and symmetry in 52 normophonic speakers.

Related Experiment Videos

  • * Utilized stroboscopy, high-speed videoendoscopy (HSV) playback, mucosal wave playback, and kymography playback.

    • Main Results:

    • * Prevalence of atypical mucosal wave magnitude and symmetry observed in normophonic speakers during both modal and pressed phonations.
    • * Significant differences in findings were noted across various visualization techniques.
    • * A correlation was found between mucosal wave assessments and habitual fundamental frequency.

    Conclusions:

    • * Variations in mucosal wave magnitude and symmetry are common in normophonic populations, increasing the risk of overdiagnosis.
    • * Combining full view and kymographic visualization techniques may offer complementary diagnostic information.
    • * Current high-speed videoendoscopy (HSV) frame rates (≤2000 fps) may be insufficient for analyzing typical female vocal phonations.