2024-03-29T13:22:29Zhttps://keep.lib.asu.edu/oai/requestoai:keep.lib.asu.edu:node-1556132021-08-27T02:47:01Zoai_pmh:all155613
https://hdl.handle.net/2286/R.I.44268
http://rightsstatements.org/vocab/InC/1.0/
All Rights Reserved
2017
v, 31 pages : color illustrations
Masters Thesis
Academic theses
Text
eng
Becvar, Brittany Patricia
Azuma, Tamiko
Weinhold, Juliet
Berisha, Visar
Arizona State University
Partial requirement for: M.S., Arizona State University, 2017
Includes bibliographical references (pages 24-25)
Field of study: Communication disorders
The purpose of this study was to identify acoustic markers that correlate with accurate and inaccurate /r/ production in children ages 5-8 using signal processing. In addition, the researcher aimed to identify predictive acoustic markers that relate to changes in /r/ accuracy. A total of 35 children (23 accurate, 12 inaccurate, 8 longitudinal) were recorded. Computerized stimuli were presented on a PC laptop computer and the children were asked to do five tasks to elicit spontaneous and imitated /r/ production in all positions. Files were edited and analyzed using a filter bank approach centered at 40 frequencies based on the Mel-scale. T-tests were used to compare spectral energy of tokens between accurate and inaccurate groups and additional t-tests were used to compare duration of accurate and inaccurate files. Results included significant differences between the accurate and inaccurate productions of /r/, notable differences in the 24-26 mel bin range, and longer duration of inaccurate /r/ than accurate. Signal processing successfully identified acoustic features of accurate and inaccurate production of /r/ and candidate predictive markers that may be associated with acquisition of /r/.
Speech therapy
Acoustic Markers
/r/ articulation
Signal Processing
Speech disorders in children
Phonemics
Hearing
Children--Language.
Developmental acoustic analysis of the