Phonological contrast and ambiguity of phonetic realization between the Japanese moraic-nasal and the vowel : A comparison between Japanese native speakers and Korean learners of Japanese

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  • 日本語の母音間における撥音と母音の音韻的対立と音声的実現の曖昧さ : 日本語母語話者と韓国語を母語とする日本語学習者との比較から
  • ニホンゴ　ノ　ボイン　カン　ニ　オケル　ハツオン　ト　ボイン　ノ　オンインテキ　タイリツ　ト　オンセイテキ　ジツゲン　ノ　アイマイサ　ニホンゴ　ボゴ　ワシャ　ト　カンコクゴ　ヲ　ボゴ　ト　スル　ニホンゴ　ガクシュウシャ　トノ　ヒカク　カラ
  • ニホンゴ ノ ボイン カン ニ オケル ハツオン ト ボイン ノ オンインテキ タイリツ ト オンセイテキ ジツゲン ノ アイマイサ : ニホンゴ ボゴワシャ ト カンコクゴ オ ボゴ ト スル ニホンゴ ガクシュウシャ ト ノ ヒカク カラ

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This study examines the difference in the perception of the Japanese moraic nasal (/ɴ/) between Japanese native speakers and Korean learners of Japanese, following the previous study (Han 2021). The experiment employs the meaningful words that contain “/ɴ/ + vowel (/goseɴeɴ/: five thousand yen)” and “vowel + vowel (/goseːeɴ/: encouragement) .” In the perceptual judgment of choosing one of the two test words, the Japanese native speakers judged /ɴ/ more frequently than the learners, and judged vowel less frequently than the learners. In comparison with the beginners of Japanese, the Japanese native speakers had higher rates of judgment as /ɴ/ even for sounds with insufficient closure. The Korean language has three nasal codas (/m, n, ŋ/) which have respectively independent places of articulation, and places of articulation must be strictly maintained in order to distinguish them. In conclusion, I found it is more difficult for the beginners of Japanese to recognize the Japanese moraic nasal, which has wide variation depending on "the degree of closure." The advanced learners showed the highest percentage of correct answers among the three groups. However, they did not reach the level of acceptance by native Japanese speakers in terms of the acceptance of vowels as free allophones of /ɴ/ in intervocalic position. This result supports the view of Kawakami (1987), which states that complete closure makes it easier to recognize stimuli as /ɴ/, while a sound closer to a vowel with no restriction is perceived as /ɴ/ more natural with intervocalic position.

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