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A voice accumulation--validation and application.

A C Ohlsson1, O Brink, A Löfqvist

  • 1University of Gothenburg, Sweden.

Journal of Speech and Hearing Research
|June 1, 1989
PubMed
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A new voice accumulator accurately measures vocal fundamental frequency and phonation time. Speech pathologists used less vocal effort and spoke more than nurses, validating the device for studying voice use.

Area of Science:

  • Speech and Hearing Sciences
  • Bioacoustics
  • Occupational Health

Background:

  • Studying natural vocal behavior requires reliable voice recording techniques.
  • Previous methods may lack the precision or duration needed for comprehensive analysis.
  • Understanding voice use in different professions is crucial for occupational health.

Purpose of the Study:

  • To introduce and validate a novel microprocessor-based voice accumulator.
  • To assess the device's accuracy in measuring fundamental frequency and phonation time over 12 hours.
  • To compare vocal behavior between nurses and speech pathologists in a field setting.

Main Methods:

  • Development of a voice accumulator using microprocessors for fundamental frequency (60-600 Hz) and phonation time.

Related Experiment Videos

  • Utilizing a contact microphone attached to the neck for voice signal acquisition.
  • Analysis of accumulated data on a personal computer, including validation and field testing.

    • Main Results:

    • The voice accumulator demonstrated accurate fundamental frequency measurements.
    • The device showed a tendency to underestimate total phonation time.
    • Speech pathologists exhibited lower fundamental frequency levels and higher phonation time compared to nurses.

    Conclusions:

    • The newly designed voice accumulator is a valid tool for studying vocal behavior in natural settings.
    • Significant differences in vocal parameters were observed between nurses and speech pathologists.
    • The findings highlight the device's utility in occupational voice research.