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http://dx.doi.org/10.13064/KSSS.2021.13.2.045

Acoustic analysis of Korean affricates produced by dysarthric speakers with cerebral palsy  

Mun, Jihyun (Department of Linguistics, Seoul Nationa University)
Kim, Sunhee (Department of French Language Education, Seoul National University)
Chung, Minhwa (Department of Linguistics, Seoul Nationa University)
Publication Information
Phonetics and Speech Sciences / v.13, no.2, 2021 , pp. 45-55 More about this Journal
Abstract
This study aims to analyze the acoustic characteristics of Korean affricates produced by dysarthric speakers with cerebral palsy. Korean fricatives and affricates are the consonants that are prone to errors in dysarthric speech, but previous studies have focused only on fricatives. For this study, three affricates /tɕ, tɕh, ͈tɕ/ appearing at word initial and intervocalic positions produced by six mild-moderate male speakers of spastic dysarthria are selected from a QOLT database constructed in 2014. The parameters representing the acoustic characteristics of Korean affricates were extracted by using Praat: frication duration, closure duration, center of gravity, variance, skewness, kurtosis, and central moment. The results are as follows: 1) frication duration of the intervocalic affricates produced by dysarthric speakers was significantly longer than that of the non-disordered speakers; 2) the closure duration of dysarthric speakers was significantly longer; 3) in the case of the center of gravity, there was no significant difference between the two groups; 4) the skewness of the dysarthric speakers was significantly larger; and 5) the central moment of dysarthric speakers was significantly larger. This study investigated the characteristics of the affricates produced by dysarthric speakers and differences with non-disordered speakers.
Keywords
acoustic analysis; dysarthria; affricate;
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