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Vowel Acoustics in Adults With Apraxia of Speech.

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Title: Vowel Acoustics in Adults With Apraxia of Speech.
Authors: Jacks, Adam1 adamjacks@gmail.com, Mathes, Katey A.1, Marquardt, Thomas P.1
Source: Journal of Speech, Language & Hearing Research. Feb2010, Vol. 53 Issue 1, p61-74. 14p. 6 Charts, 5 Graphs.
Subject Terms: Vowels, Speech apraxia, Physiological aspects of speech, American English language, Mathematical linguistics, Formants (Speech)
Geographic Terms: United States
Abstract: Purpose: To investigate the hypothesis that vowel production is more variable in adults with acquired apraxia of speech (AOS) relative to healthy individuals with unimpaired speech. Vowel formant frequency measures were selected as the specific target of focus. Method: Seven adults with AOS and aphasia produced 15 repetitions of 6 American English vowels in /hVC/ context (hid, head, hat, hot, hub, hoot). Vowel formant frequency measures (F1, F2) were Bark transformed and compared with data from archival sources. Results: Measures of vowel acoustics in speakers with AOS did not differ from those of unimpaired speakers, including absolute Bark formant values, vowel space area, intervowel distance, and individual trial-to-trial formant variability. Conclusion: Comparison with normative acoustic measures suggested that vowel production at the word level is unimpaired in the current speakers with AOS, supporting previous studies that have shown vowel production is relatively intact in AOS. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Speech, Language & Hearing Research is the property of American Speech-Language-Hearing Association 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: Education Research Complete
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  Data: Vowel Acoustics in Adults With Apraxia of Speech.
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  Data: <searchLink fieldCode="AR" term="%22Jacks%2C+Adam%22">Jacks, Adam</searchLink><relatesTo>1</relatesTo><i> adamjacks@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Mathes%2C+Katey+A%2E%22">Mathes, Katey A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Marquardt%2C+Thomas+P%2E%22">Marquardt, Thomas P.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Speech%2C+Language+%26+Hearing+Research%22">Journal of Speech, Language & Hearing Research</searchLink>. Feb2010, Vol. 53 Issue 1, p61-74. 14p. 6 Charts, 5 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Vowels%22">Vowels</searchLink><br /><searchLink fieldCode="DE" term="%22Speech+apraxia%22">Speech apraxia</searchLink><br /><searchLink fieldCode="DE" term="%22Physiological+aspects+of+speech%22">Physiological aspects of speech</searchLink><br /><searchLink fieldCode="DE" term="%22American+English+language%22">American English language</searchLink><br /><searchLink fieldCode="DE" term="%22Mathematical+linguistics%22">Mathematical linguistics</searchLink><br /><searchLink fieldCode="DE" term="%22Formants+%28Speech%29%22">Formants (Speech)</searchLink>
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  Data: Purpose: To investigate the hypothesis that vowel production is more variable in adults with acquired apraxia of speech (AOS) relative to healthy individuals with unimpaired speech. Vowel formant frequency measures were selected as the specific target of focus. Method: Seven adults with AOS and aphasia produced 15 repetitions of 6 American English vowels in /hVC/ context (hid, head, hat, hot, hub, hoot). Vowel formant frequency measures (F1, F2) were Bark transformed and compared with data from archival sources. Results: Measures of vowel acoustics in speakers with AOS did not differ from those of unimpaired speakers, including absolute Bark formant values, vowel space area, intervowel distance, and individual trial-to-trial formant variability. Conclusion: Comparison with normative acoustic measures suggested that vowel production at the word level is unimpaired in the current speakers with AOS, supporting previous studies that have shown vowel production is relatively intact in AOS. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Journal of Speech, Language & Hearing Research is the property of American Speech-Language-Hearing Association 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: 10.1044/1092-4388(2009/08-0017)
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              Text: Feb2010
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