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[Laser measuring device for phonation].

G Schade1, T Kirchhoff, M Hess

  • 1Poliklinik für Hör-, Stimm- und Sprachheilkunde, Universitätsklinikum Hamburg-Eppendorf, Hamburg, Deutschland. g.schade@uke.uni-hamburg.de

Folia Phoniatrica Et Logopaedica : Official Organ of the International Association of Logopedics and Phoniatrics (IALP)
|July 23, 2005
PubMed
Summary
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This study found that increased sound pressure level (SPL) directly increases vocal fold movement velocity. Fundamental frequency (F0) did not significantly affect vocal fold velocity during phonation.

Area of Science:

  • Laryngology
  • Acoustic analysis
  • Biomechanics of phonation

Context:

  • Vocal fold movement velocity is crucial for voice production.
  • Accurate measurement of vocal fold dynamics is essential for understanding voice disorders.
  • Previous methods for measuring vocal fold amplitude and velocity had limitations.

Purpose:

  • To investigate the influence of sound pressure level (SPL) and fundamental frequency (F0) on vocal fold movement velocity.
  • To quantify the horizontal amplitude velocity of vocal folds during the phonatory cycle.
  • To explore the relationship between acoustic parameters and vocal fold dynamics.

Summary:

  • A novel combination of videostroboscopy and a two-point light projection method was used to measure vocal fold velocity in 40 healthy volunteers.

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  • Measurements were taken across varying SPLs and F0s, including different vocal registers (chest voice, falsetto).
  • Results indicate that increased SPL significantly enhances vocal fold velocity, while F0 shows no statistically significant correlation.

    • Impact:

    • This research clarifies the role of SPL in vocal fold dynamics, providing valuable data for clinical voice assessment.
    • The findings contribute to a better understanding of the biomechanics of phonation.
    • The study highlights SPL as a key determinant of vocal fold movement velocity, distinct from F0.