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Measures of Voice Onset Time: A Meth...

Rae, Rebecca.

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Measures of Voice Onset Time: A Methodological Study.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Measures of Voice Onset Time: A Methodological Study./
Author:	Rae, Rebecca.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
Description:	72 p.
Notes:	Source: Masters Abstracts International, Volume: 57-06.
Contained By:	Masters Abstracts International57-06(E).
Subject:	Speech therapy. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10871602
ISBN:	9780438093850

Measures of Voice Onset Time: A Methodological Study.
Rae, Rebecca.

Measures of Voice Onset Time: A Methodological Study. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 72 p.

Source: Masters Abstracts International, Volume: 57-06.

Thesis (M.S.)--Bowling Green State University, 2018.

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.

ISBN: 9780438093850Subjects--Topical Terms:

520446
Speech therapy.

Measures of Voice Onset Time: A Methodological Study.
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502 $a Thesis (M.S.)--Bowling Green State University, 2018.
520 $a 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.
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