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Effect of Voice Onset Type on Vocal Attack Time.

Ben C Watson1, R J Baken1, Rick M Roark2

  • 1Department of Speech-Language Pathology, New York Medical College, Valhalla, New York.

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|March 22, 2015
PubMed
Summary

Vocal attack time (VAT) differs based on voice onset type. Aspirated onsets, like in "hallways," show longer VAT than unaspirated onsets, indicating VAT

Keywords:
PhonationVocal attack timeVocal fold physiologyVoice onset

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Area of Science:

  • Speech and Hearing Sciences
  • Acoustic Phonetics
  • Voice Production

Background:

  • Vocal attack time (VAT) measures the lag between sound pressure (SP) and electroglottographic (EGG) signals during voice initiation.
  • Voice initiation characteristics are crucial for vocal hygiene, efficiency, and quality.
  • Vocal onsets are typically classified as hard, simultaneous, or breathy.

Purpose of the Study:

  • To investigate the impact of different voice onset types on VAT values in healthy speakers.
  • To determine if VAT can serve as an objective clinical measure for vocal onset classification.

Main Methods:

  • Recorded SP and EGG signals from 112 participants (55 female, 57 male).
  • Participants produced sustained /ɑ/, the word "always" (unaspirated onsets), and the word "hallways" (aspirated onset).
  • Analyzed VAT differences across the three vocal onset tasks.

Main Results:

  • A significant effect of onset type on VAT was observed.
  • Mean VAT was significantly greater for the aspirated onset task ("hallways") compared to unaspirated tasks ("sustained /ɑ/" and "always").
  • No significant VAT difference was found between the sustained /ɑ/ and "always" tasks.

Conclusions:

  • VAT is sensitive to the type of vocal onset.
  • VAT has potential as a quantitative clinical tool for assessing vocal onset characteristics.
  • Findings support the use of VAT in evaluating vocal production and potential disorders.