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http://dx.doi.org/10.13064/KSSS.2022.14.3.041

A study on the predictability of acoustic power distribution of English speech for English academic achievement in a Science Academy  

Park, Soon (Department of English Language Education, Seoul National University)
Ahn, Hyunkee (Department of English Language Education, Seoul National University)
Publication Information
Phonetics and Speech Sciences / v.14, no.3, 2022 , pp. 41-49 More about this Journal
Abstract
The average acoustic distribution of American English speakers was statistically compared with the English-speaking patterns of gifted students in a Science Academy in Korea. By analyzing speech recordings, the duration time of which is much longer than in previous studies, this research identified the degree of acoustic proximity between the two parties and the predictability of English academic achievement of gifted high school students. Long-term spectral acoustic power distribution vectors were obtained for 2,048 center frequencies in the range of 20 Hz to 20,000 Hz by applying an long-term average speech spectrum (LTASS) MATLAB code. Three more variables were statistically compared to discover additional indices that can predict future English academic achievement: the receptive vocabulary size test, the cumulative vocabulary scores of English formative assessment, and the English Speaking Proficiency Test scores. Linear regression and correlational analyses between the four variables showed that the receptive vocabulary size test and the low-frequency vocabulary formative assessments which require both lexical and domain-specific science background knowledge are relatively more significant variables than a basic suprasegmental level English fluency in the predictability of gifted students' academic achievement.
Keywords
acoustics; long-term average speech spectrum (LTASS); English speech analysis; Science Academy; vocabulary teaching;
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