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Effects of speaking rate on f0 trajectories: Evidence from Thai lexical tones.

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Title: Effects of speaking rate on f0 trajectories: Evidence from Thai lexical tones.
Authors: Burroni, Francesco1,2 (AUTHOR) francesco.burroni@phonetik.uni-muenchen.de, Kirby, James1 (AUTHOR)
Source: Journal of the Acoustical Society of America. Aug2025, Vol. 158 Issue 2, p1204-1226. 23p.
Subjects: Tone (Phonetics), Articulation (Speech), Audio frequency, Intonation (Phonetics), Human voice, Speech
Abstract: This paper investigates the effect of speaking rate on tone production in Thai through two production experiments involving 44 speakers. Our analyses reveal clear trends: as speech rate increases, Thai speakers predominantly adjust the rate of fundamental frequency (f0) change to maintain tonal contours, with minimal alterations to contour shapes and values. Additionally, speakers tend to elevate the f0 onset value for most tones, positioning the contour within a higher f0 space at faster rates. While effects resembling "truncation" and undershoot of f0 contours occur in specific tonal combinations at faster speaking rates, we suggest that they are best attributed to global retiming of laryngeal commands governing f0 production. The strategies observed in laryngeal adjustments during faster speech rates are, thus, reminiscent of those observed in supralaryngeal articulation, suggesting the existence of a unified mechanism where rate effects impact both laryngeal and supralaryngeal articulation. [ABSTRACT FROM AUTHOR]
Copyright of Journal of the Acoustical Society of America is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 187640919
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Effects of speaking rate on f0 trajectories: Evidence from Thai lexical tones.
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  Data: <searchLink fieldCode="AR" term="%22Burroni%2C+Francesco%22">Burroni, Francesco</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> francesco.burroni@phonetik.uni-muenchen.de</i><br /><searchLink fieldCode="AR" term="%22Kirby%2C+James%22">Kirby, James</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+the+Acoustical+Society+of+America%22">Journal of the Acoustical Society of America</searchLink>. Aug2025, Vol. 158 Issue 2, p1204-1226. 23p.
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  Data: <searchLink fieldCode="DE" term="%22Tone+%28Phonetics%29%22">Tone (Phonetics)</searchLink><br /><searchLink fieldCode="DE" term="%22Articulation+%28Speech%29%22">Articulation (Speech)</searchLink><br /><searchLink fieldCode="DE" term="%22Audio+frequency%22">Audio frequency</searchLink><br /><searchLink fieldCode="DE" term="%22Intonation+%28Phonetics%29%22">Intonation (Phonetics)</searchLink><br /><searchLink fieldCode="DE" term="%22Human+voice%22">Human voice</searchLink><br /><searchLink fieldCode="DE" term="%22Speech%22">Speech</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: This paper investigates the effect of speaking rate on tone production in Thai through two production experiments involving 44 speakers. Our analyses reveal clear trends: as speech rate increases, Thai speakers predominantly adjust the rate of fundamental frequency (f0) change to maintain tonal contours, with minimal alterations to contour shapes and values. Additionally, speakers tend to elevate the f0 onset value for most tones, positioning the contour within a higher f0 space at faster rates. While effects resembling "truncation" and undershoot of f0 contours occur in specific tonal combinations at faster speaking rates, we suggest that they are best attributed to global retiming of laryngeal commands governing f0 production. The strategies observed in laryngeal adjustments during faster speech rates are, thus, reminiscent of those observed in supralaryngeal articulation, suggesting the existence of a unified mechanism where rate effects impact both laryngeal and supralaryngeal articulation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of the Acoustical Society of America is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1121/10.0038965
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: Articulation (Speech)
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      – SubjectFull: Audio frequency
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      – SubjectFull: Intonation (Phonetics)
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              M: 08
              Text: Aug2025
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              Y: 2025
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