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Acoustic Analysis of Speech of Persons with Autistic Spectrum Disorders

John, Jeeva
http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1206329066

Abstract Details

2008, Master of Science (MS), Bowling Green State University, Communication Disorders/Speech-Language Pathology.
This study investigated differences in prosodic characteristics between the speech of individuals with autism spectrum disorders (ASD) and typically developing (TD) controls, using both acoustic-phonetic and perceptual analyses. 4 individuals with ASD with ages ranging from 9 to 25 (3 males and 1 female) and 3 age- (+/- 1 year) and gender-matched TD controls with ages ranging from 10 to 25 were participants. Three sets of speech samples – spontaneous speech, imitated speech, and reading sample – were recorded. Acoustic-phonetic analyses were conducted on amplitude of prestressed voiced stop consonants and duration of word final fricatives of reading samples. Perceptual analyses were conducted on both the reading and spontaneous speech samples. Nine speech-language pathology graduate students rated the 7 speakers on naturalness, voice quality, rhythm, intonation, fluency, loudness, and overall intelligibility. The participants with ASD did not demonstrate a significant difference in the acoustic phonetic analyses when compared to the TD control participants. In the perceptual analyses, blind raters identified a significant difference in participants with ASD as compared to their TD controls in all characteristics except voice quality. The findings thus did not support amplitude of prestressed voiced stop consonants and duration of word final fricatives as appropriate acoustic markers of deviant prosody in the ASD population. In contrast, listeners were able to detect some prosodic differences in the speech of individuals with ASD; therefore, perceptual analyses may be used to guide future acoustic analyses for appropriate markers of prosodic deviances in the speech of individuals with ASD.
Lynne Hewitt, PhD (Advisor)
Laura Dilley, PhD (Committee Member)
Ronald Scherer, PhD (Committee Member)
53 p.
Acoustics; Communication; Health; Special Education; Speech Therapy
prosody; Autistic Spectrum Disorders; ASD; acoustic analysis; autism; perceptual analysis

Recommended Citations

Citations

  • John, J. (2008). Acoustic Analysis of Speech of Persons with Autistic Spectrum Disorders [Master's thesis, Bowling Green State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1206329066

    APA Style (7th edition)

  • John, Jeeva. Acoustic Analysis of Speech of Persons with Autistic Spectrum Disorders. 2008. Bowling Green State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1206329066.

    MLA Style (8th edition)

  • John, Jeeva. "Acoustic Analysis of Speech of Persons with Autistic Spectrum Disorders." Master's thesis, Bowling Green State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1206329066

    Chicago Manual of Style (17th edition)

bgsu1206329066
1,762
© 2008, all rights reserved.
This open access ETD is published by Bowling Green State University and OhioLINK.