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http://dx.doi.org/10.13064/KSSS.2021.13.1.073

Change in lip movement during speech by aging: Based on a double vowel  

Park, Hee-June (Department of Speech and Hearing Therapy, Catholic University of Pusan)
Publication Information
Phonetics and Speech Sciences / v.13, no.1, 2021 , pp. 73-79 More about this Journal
Abstract
This study investigated the change in lip movement during speech according to aging. For the study, 15 elderly women with an average of 69 years and 15 young women with an average of 22 years were selected. To measure the movement of the lips, the ratio between the minimum point and the maximum point of movement when pronouncing a double vowel was analyzed in pixel units using image analysis software. For clinical utility, the software was produced by applying an automated algorithm and compared with the results of handwork. This study found that the range of the width and length of lips in double vowel tasks was smaller for the elderly than that of the young. A strong positive correlation was found between manual and automated methods, indicating that both methods are useful for extracting lip contours. Based on the above results, it was found that the range of the lips decreased when ignited as aging progressed. Therefore, monitoring the condition of lip performance by simply measuring the movement of lips before aging progresses, and performing exercises to maintain lip range, will prevent pronunciation problems caused by aging.
Keywords
lip movement; aging; double vowel; contour extraction;
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