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Related Experiment Videos

Normal values and predictive equations for aerodynamic function in British Caucasian subjects

C H Dobinson1, A H Kendrick

  • 1Speech Therapy Department, Bristol Royal Infirmary, UK.

Folia Phoniatrica
|January 1, 1993
PubMed
Summary

This study established new reference equations for aerodynamic function in speech, providing more accurate assessments. The findings offer improved objective measurements for mean flow rate (MFR) and phonation quotient (PQ).

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Area of Science:

  • Speech science
  • Aerodynamic function assessment
  • Voice and speech pathology

Background:

  • Objective aerodynamic measurements are crucial in speech clinics.
  • Existing reference ranges for aerodynamic function may not be optimal.
  • Respirometry offers valid and reliable measures of air volume and flow.

Purpose of the Study:

  • To derive new reference equations for aerodynamic function in British adults.
  • To investigate the influence of age on aerodynamic measures.
  • To compare new findings with previously reported normal ranges.

Main Methods:

  • Studied aerodynamic function in 76 British Caucasian subjects.
  • Measured mean flow rate (MFR), phonation quotient (PQ), vocal velocity index (VVI), phonation time, and phonation volume/vital capacity ratio.

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  • Investigated resting breathing patterns.

    • Main Results:

    • Derived reference equations for key aerodynamic measures, incorporating age as a significant factor.
    • Found MFR, PQ, and VVI to be greater than previously reported values.
    • Established new normative data for aerodynamic function.

    Conclusions:

    • The derived reference equations provide a more appropriate assessment of aerodynamic function.
    • Age-specific equations enhance the clinical utility of aerodynamic measures.
    • This study contributes updated, reliable data for speech and voice analysis.