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The effects of vocal loudness and speaking rate on voice-onset time in typically developing children and children with cochlear implants Open Access


Other title
vocal loudness
speaking rate
cochlear implants
voice onset time
Type of item
Degree grantor
University of Alberta
Author or creator
Knuttila, Erica Lynn
Supervisor and department
Campbell, Melanie (Speech Pathology and Audiology)
Boliek, Carol (Speech Pathology and Audiology)
Examining committee member and department
Hodgetts, Bill (Speech Pathology and Audiology)
Zhang, Ming (Speech Pathology and Audiology)
Ritter, Kathryn (Communication Disorders)
Department of Speech Pathology and Audiology

Date accepted
Graduation date
Master of Science
Degree level
This study explores the effects of manipulating vocal loudness and speech rate on voice onset time (VOT) in normal hearing children and two children with cochlear implants (CIs). 15 normal hearing participants and two participants with CIs produced all six stop consonants in the phrase “It’s a Cod again” while speaking normally, softly, loudly, slowly, and quickly. Consonants were grouped into voiced and voiceless categories for comparison. Results indicated that the group of normal hearing children produced longer VOTs for voiceless stops than voiced across all conditions. When speaking loudly or quickly, VOT values were shorter than at normal levels. When speaking softly or slowly, VOT values were longer than at normal levels. The two children with CIs performed in a similar manner to the normal hearing group; however, VOTs produced by the six-year old participant were consistently longer than those of the normal hearing group across all conditions.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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File title: Speech Intelligibility & Voice-onset Time
File author: Erica Knuttila
Page count: 94
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