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PHONETIC AND ACOUSTIC ANALYSES OF TWO NEW CASES OF FOREIGN ACCENT SYNDROME
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| Title | PHONETIC AND ACOUSTIC ANALYSES OF TWO NEW CASES OF FOREIGN ACCENT SYNDROME |
| Author | Perkins, Rosalie
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| Keywords | FAS
Foreign Accent Syndrome
Motor Speech Disorders
acoustic analyses
phonetic analyses
aphasia
apraxia of speech
voice onset time
fundamental frequency
vowels
vowel duration
word duration
formant frequencies
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| Abstract | This study presents detailed phonetic and acoustic analyses of the speech characteristics of two new cases of Foreign Accent Syndrome (FAS). Participants include a 48-year-old female who began speaking with an "Eastern European" accent following a traumatic brain injury, and a 45-year-old male who presented with a "British" accent following a subcortical cerebral vascular accident (CVA). Identical samples of the participants' pre- and post-morbid speech were obtained, thus affording a new level of control in the study of Foreign Accent Syndrome. The speech tasks consisted of oral readings of the Grandfather Passage and 18 real words comprised of the stop consonants /p/, /t/, /k/, /b/, /d/, /g/ combined with the peripheral vowels /i/, /a/ and /u/ and ending in a voiceless stop. Computer-based acoustic measures included: 1) voice onset time (VOT), 2) vowel durations, 3) whole word durations, 4) first, second and third formant frequencies, and 5) fundamental frequency. Formant frequencies were measured at three points in the vowel duration: a) 20%, b) 50%, and c) 80% to assess differences in vowel 'onglides' and 'offglides'. The phonetic analysis provided perceptual identification of the major phonetic features associated with the foreign quality of participant's FAS speech, while acoustic measures allowed precise quantification of these features. Results indicated evidence of backing of consonant and vowel productions for both participants. The implications for future research and clinical applications are also considered. |
| Adviser | Ryalls, Jack
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| Publisher | University of Central Florida |
| Degree | M.A.
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| Degree Discipline | Department of Communication Sciences and Disorders
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| Degree Grantor | Health and Public Affairs
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| Degree Program | Comm Sciences & Disorders MA
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| Graduation Date | 2007-01-01 |
| Type | Master's thesis
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| Access Level | Public - Allow Worldwide Access
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| Release Date | 2007-11-01 |
| Repository | University Archives
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| Repository Collection | Electronic Theses and Dissertations
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| Identifier | CFE0001916 |
| Access Link | http://purl.fcla.edu/fcla/etd/CFE0001916 |
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