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Related Experiment Videos

Variability of phonetograms.

P Gramming1, J Sundberg, L Akerlund

  • 1Department of Phoniatrics, ENT Clinic, Malmö General Hospital, Sweden.

Folia Phoniatrica
|January 1, 1991
PubMed
Summary
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Phonetogram voice analysis reveals short-term sound pressure level (SPL) variation is around 5 dB for soft phonation and less for loud phonation. Long-term SPL variation shows a standard deviation of approximately 3 dB, impacting clinical phonetogram use.

Area of Science:

  • Speech science
  • Acoustic phonetics
  • Voice disorders

Background:

  • Phonetograms visualize voice sound pressure level (SPL) across frequencies, crucial for voice analysis.
  • Understanding phonetogram variability is essential for accurate clinical interpretation and diagnosis.

Purpose of the Study:

  • To investigate sources of variation in phonetograms.
  • To analyze short-term and long-term SPL variability in normal speakers and patients with nonorganic dysphonia.
  • To assess inter-investigator agreement in SPL measurements.

Main Methods:

  • Analysis of short-term SPL variation within vocalizations for 20 normal speakers and 10 female patients with nonorganic dysphonia.
  • Measurement of SPL using a sound-level meter.
  • Long-term variation analysis from 15 phonetogram recordings over different days for two subjects.

Related Experiment Videos

  • Assessment of inter-investigator agreement on SPL measurements.

    • Main Results:

    • Short-term SPL variability was approximately 5 dB for soft phonation and lower for loud phonation.
    • Inter-investigator agreement for SPL measurements was found to be good.
    • Long-term SPL variation yielded a standard deviation of approximately 3 dB when averaged across frequencies and subjects.

    Conclusions:

    • Phonetogram variability, particularly short-term SPL fluctuations, provides insights into voice function.
    • Established variability measures can inform the clinical application of phonetograms for voice assessment.
    • The findings support the utility of phonetograms in identifying voice characteristics and potential disorders.