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Characterization of the electroglottographic waveform: a primary study to investigate vocal fold functioning.

G B Houben1, R Buekers, H Kingma

  • 1Department of Otorhinolaryngology, University Hospital Maastricht, The Netherlands.

Folia Phoniatrica
|January 1, 1992
PubMed
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This study used electroglottography (EGG) to analyze vocal fold function in normal and pathological voices. Results indicate that consistent EGG parameter estimation requires at least 5 measurements per condition and protocol refinement.

Area of Science:

  • Laryngology
  • Speech Science
  • Biomedical Engineering

Background:

  • Objective assessment of vocal fold functioning is crucial for diagnosing voice disorders.
  • Electroglottography (EGG) provides a non-invasive method to analyze vocal fold vibration.
  • Understanding EGG parameter variations across different voice types and conditions is essential.

Purpose of the Study:

  • To objectify vocal fold functioning using electroglottographic (EGG) signal processing.
  • To investigate EGG parameters in relation to voice intensity and frequency within the chest register.
  • To compare EGG measurements between normal and pathological voice samples.

Main Methods:

  • Processing of electroglottographic (EGG) signals from 7 normal and 12 pathological voices.

Related Experiment Videos

  • Measurements conducted across varying voice intensity and frequency within the chest register.
  • Reproduction measurements to assess the reliability and consistency of EGG parameter estimation.

    • Main Results:

    • At least 5 measurements per intensity/frequency pair are necessary for reliable EGG parameter estimation.
    • Averaged results over approximately 20 measurements revealed significant differences in some EGG parameters between distinct voice categories.
    • Variability in results suggests a need for improved measurement protocols.

    Conclusions:

    • The study highlights the importance of sufficient measurement repetitions for accurate EGG analysis.
    • Differences in EGG parameters were observed between normal and pathological voices, particularly at specific intensity/frequency points.
    • Recommendations are made for refining the measurement protocol and adjusting parameters to enhance result consistency.