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Area of Science:

  • Speech-language pathology
  • Auditory-motor control
  • Voice disorders

Background:

  • Prior studies indicate altered auditory feedback processing in hyperfunctional voice disorders (HVDs).
  • It remains unclear if individuals with HVDs exhibit deficits in volitional vocal parameter adjustments.

Purpose of the Study:

  • To compare the ability to make minimal changes in vocal fundamental frequency (F0) and intensity.
  • To investigate volitional vocal control in individuals with and without HVDs.

Main Methods:

  • Twenty-six individuals with HVDs and 26 controls performed tasks assessing smallest volitional increases/decreases in F0 and intensity.
  • Measures included mean smallest change, variability, and accuracy of change direction.
  • General linear models were used to analyze group differences.

Main Results:

  • No significant differences were observed between individuals with and without HVDs in vocal parameter control.
  • Singers demonstrated significantly smaller minimal changes in both F0 and intensity compared to nonsingers.

Conclusions:

  • The findings suggest that impaired auditory-motor control in HVDs is not due to a general deficit in making small vocal adjustments.
  • The minimal voice movement task is sensitive to differences, such as singing experience.