Variability in Vowel Production within and between Days

PloS One
Shannon L M Heald, Howard C Nusbaum

Abstract

Although the acoustic variability of speech is often described as a problem for phonetic recognition, there is little research examining acoustic-phonetic variability over time. We measured naturally occurring acoustic variability in speech production at nine specific time points (three per day over three days) to examine daily change in production as well as change across days for citation-form vowels. Productions of seven different vowels (/EE/, /IH/, /AH/, /UH/, /AE/, /OO/, /EH/) were recorded at 9AM, 3PM and 9PM over the course of each testing day on three different days, every other day, over a span of five days. Results indicate significant systematic change in F1 and F0 values over the course of a day for each of the seven vowels recorded, whereas F2 and F3 remained stable. Despite this systematic change within a day, however, talkers did not show significant changes in F0, F1, F2, and F3 between days, demonstrating that speakers are capable of producing vowels with great reliability over days without any extrinsic feedback besides their own auditory monitoring. The data show that in spite of substantial day-to-day variability in the specific listening and speaking experiences of these participants and thus exposure to d...Continue Reading

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Citations

Sep 26, 2019·Proceedings. Biological Sciences·Michel BelykSonja A Kotz
Jun 4, 2019·The Journal of the Acoustical Society of America·Wei-Rong ChenChristine H Shadle
Jan 1, 2017·Laboratory Phonology·Carolyn QuamLouAnn Gerken
Jan 9, 2019·Language, Cognition and Neuroscience·Dave F Kleinschmidt
Dec 5, 2019·The Journal of the Acoustical Society of America·Houri K VorperianDaniel M Bolt
Aug 8, 2018·Phonetica·Charlotte VaughnKaori Idemaru
Mar 5, 2021·Wiley Interdisciplinary Reviews. Cognitive Science·Carolyn Quam, Sarah C Creel

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