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Developmental Acoustic Analysis of t...

Becvar, Brittany Patricia.

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Developmental Acoustic Analysis of the /r/ Phoneme.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Developmental Acoustic Analysis of the /r/ Phoneme./
Author:	Becvar, Brittany Patricia.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
Description:	37 p.
Notes:	Source: Masters Abstracts International, Volume: 56-04.
Contained By:	Masters Abstracts International56-04(E).
Subject:	Speech therapy. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10276202
ISBN:	9781369770179

Developmental Acoustic Analysis of the /r/ Phoneme.
Becvar, Brittany Patricia.

Developmental Acoustic Analysis of the /r/ Phoneme. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 37 p.

Source: Masters Abstracts International, Volume: 56-04.

Thesis (M.S.)--Arizona State University, 2017.

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/.

ISBN: 9781369770179Subjects--Topical Terms:

520446
Speech therapy.

Developmental Acoustic Analysis of the /r/ Phoneme.
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245 1 0 $a Developmental Acoustic Analysis of the /r/ Phoneme.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2017
300 $a 37 p.
500 $a Source: Masters Abstracts International, Volume: 56-04.
500 $a Adviser: Tamiko Azuma.
502 $a Thesis (M.S.)--Arizona State University, 2017.
520 $a 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/.
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