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KMID : 1022420180100030041
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Phonetics and Speech Sciences
2018 Volume.10 No. 3 p.41 ~ p.48
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A perceptual and acoustical study of /ㅅ/ in children's speech
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Kim Ji-Youn
Seong Cheol-Jae
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Abstract
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This study examined the acoustic characteristics of Korean alveolar fricatives of normal children. Developing children aged 3 and 7, typically produced 2 types of nonsense syllables containing alveolar fricative /sV/ and /VsV/ sequences where V was any one of three corner vowels (/i, a, and u/). Stimuli containing the speech materials used in a production experiment were presented randomly to 12 speech language pathologists (SLPs) for a perception test. The SLPs responded by selecting one of seven alternative sounds. Acoustic measures such as duration of frication noise, normalized intensity, skewness, and center of gravity were examined. There was significant difference in acoustic measures when comparing vowels. Comparison of syllable structures indicated statistically significant differences in duration of frication noise and normalized intensity. Acoustic parameters could account for the perceptual data. Relating the acoustic and perception data by means of logistic regression suggests that duration of frication noise and normalized intensity are the primary cues to perceiving Korean fricatives.
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KEYWORD
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alveolar fricative , acoustical , perceptual experiment , frication duration , normalized energy
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