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Coarticulation in Japanese Syllable Sequences Observed with MRI Motion Imaging(<Feature Article>Methodology for Speech Physiology Research)

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  • MRI動画撮像により観測した日本語音節連鎖における調音結合(<特集>音声生理研究の方法)
  • MRI動画撮像により観測した日本語音節連鎖における調音結合
  • MRI ドウガ サツゾウ ニ ヨリ カンソク シタ ニホンゴ オンセツ レンサ ニ オケル チョウオン ケツゴウ

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Abstract

This study employs MRI motion imaging to investigate vowel-consonant coarticulation during utterances with /t//c//d//z//k/, and /g/ in the Japanese syllabary. Image analyses were conducted for the variation in horizontal and vertical tongue position. Results show the followings. 1) Variation in tongue position and shape was larger for consonants than for vowels. 2) Articulatory positions for consonants varied depending on concentration of consonants at specific regions. 3) So-called velar consonants /k/ and /g/ in Japanese were realized as post-palatal consonants. 4) Tongue positions for vowels were higher after velar consonants, while they were lower after alveolar consonants. 5) Japanese five vowels were observed in two groups, anterior-mid (/i//e//u/) and posterior-low (/a//o/), with /u/ as a non-back vowel and /a/ as a back vowel.

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