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Thesis rae 04.28 Draft.pdf (2.19 MB)

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Measures of Voice Onset Time: A Methodological Study

Rae, Rebecca C
http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1522356095329958

Abstract Details

2018, Master of Science (MS), Bowling Green State University, Communication Disorders.
The current investigation aimed to compare four different measurement approaches for the determination of voice onset time for the six English stop consonants, where VOT is defined as the "burst to onset of phonation". The signals of interest were the wideband airflow, microphone, electroglottograph, and the spectrographic display. A primary question was whether the use of the wideband airflow signal results in shorter VOT measurements. Two adult males and two adult females produced "CV-the-CV" utterances (e.g.,"pa the pa") containing the six English stop consonants across two conditions, habitual vs. clear speech. Visual measurements were from the burst to the initial detection of phonation (IDP). The wideband airflow gave the shortest VOT measures. For habitual speech and for the voiceless stop consonants, the airflow signal revealed glottal airflow oscillations on average of 1.7 ms sooner than the microphone signal, 8.1 ms sooner than the EGG signal, and 13.6 ms sooner than spectrographic formant detection. The VOT differences between the airflow and microphone signals were not significant. For voiced stop consonants, the airflow signal typically also gave similar values of VOT as the microphone signal, and on average 6 ms sooner than the formant excitation and 5 ms sooner than the electroglottograph signal. The study emphasizes the finding that the initial detection of phonation often appears earlier after the consonant burst for the wideband airflow and microphone signals in comparison to the electroglottograph and spectrographic signals.
Ronald Scherer, PhD (Advisor)
Jason Whitfield, PhD (Committee Member)
Brent Archer, PhD (Committee Member)
71 p.
Physiology; Speech Therapy
voice onset time; VOT; stop consonants; measurement approach; methodology; airflow; wideband airflow; aerodynamic measures; electroglottography; spectrogram; oscillogram; micophone signal

Recommended Citations

Citations

  • Rae, R. C. (2018). Measures of Voice Onset Time: A Methodological Study [Master's thesis, Bowling Green State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1522356095329958

    APA Style (7th edition)

  • Rae, Rebecca. Measures of Voice Onset Time: A Methodological Study. 2018. Bowling Green State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1522356095329958.

    MLA Style (8th edition)

  • Rae, Rebecca. "Measures of Voice Onset Time: A Methodological Study." Master's thesis, Bowling Green State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1522356095329958

    Chicago Manual of Style (17th edition)

bgsu1522356095329958
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© 2018, some rights reserved.Creative Commons License Measures of Voice Onset Time: A Methodological Study by Rebecca C Rae is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by Bowling Green State University and OhioLINK.