韓国人学習者の日本語朗読文の発話に見られる音節長の特徴

Abstract

This paper examines the feature of the rhythm in production of reading Japanese sentences by Korean Learners of Japanese(KL), comparing with Arabian Learners(AL) and a Japanese(NS). The average duration of each syllable (CVQ,CVN,CVR,CV) in reading sentences by all subjects were measured. The results are as follows. 1) The duration of CVQ(stop geminate), CVN(nasal), and CVR(long vowel) in production by learners was shorter than NS. This shows that the duration of heavy syllable is insufficient to recognize it as two‒mora. 2) It was found that extending of the duration of CV in production by KL and AL depends on syllable structure : CV in the complex structure, for example, light(syllable) + heavy (syllable)+light+heavy, becomes longer easily, than CV in the simple structure, for example, lignt + light + light . CV placed between heavy syllables and CV preceding or following to a heavy syllable extends easily. On the other hand, in production by NS and advanced learners, CV was controlled at time, and time confrontation of one‒mora and two‒mora was observed. 3) The feature that CV extended as 212 type became 222 type or 122 type became 222 type was also observed not only by KL but also by AL though KL have been said to have this tendency in the previous work. 4) The duration of some CVCV were too long as two‒mora in production by the learners of the middle class. It was cause that voiced consonants and nasal extended in AL production, and closure duration(CD) in plosive extended in KL production. On the whole, CD by KL is lengthened compared with AL and NS, and it can be said that it is characteristic in KL. I suggest that paying attention to not only the length of Sokuon(Stop geminate), Hatsuon(nasal), Chōon(long vowel) but also the length of CV leads to natural rhythm of Japanese where time confrontation of one-mora and two-mora is achieved.