対外国人発話の母音音響特徴分析

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  • Variation of vowels in foreigner talk
  • タイ ガイコクジン ハツワ ノ ボイン オンキョウ トクチョウ ブンセキ

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Abstract : This research covers pragmatic phonetics of the English language. Based on a spontaneous dialogs survey carried out at the Phonetic Laboratory of Yamagata University in Japan in 2008-2009, it provides a portrait of the features of vowels of foreigner talk. The main focus of the research is on the causes and the consequences of vowel change whose features are defined by values of the first and the second formants. Although a major aim of this report is the establishment of the links between an English native speaker’s talk and his foreigner talk, there is also extensive information on the role of the linguistic adjustment effect in the development of vowel change in foreigner talk. A preliminary experiment is conducted for the examination of vowels with a possible outcome that native English speakers, especially those who have been living in Japan for a long time present a different phonetic quality when they interact with Japanese learners of English. It is observed that vowel space tends to expand much more in oral readings of word lists than in dialogs. It is also observed that vowel space expands more when native English speakers talk with non-native speakers, in this case with native Japanese speakers. The expansion of vowel space is also observed when they orally read a native Japanese speaker’s transcript.

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