Investigating vowel differences in North and South Korea: Phonetic analysis of younger speakers in read and conversational speech
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Previous studies have highlighted the linguistic divergence between North and South Korean varieties. Although acoustic differences between North and South Korean in vowel production have been prominently observed, the vowel production in the standard varieties of Pyongyang North Korean (NK) and Seoul South Korean (SK) has had limited investigation. This study aims to explore the phonetic differences in vowel production between NK and SK speakers across two speech styles: careful and conversational speech. We analyzed a total of 13,370 vowels from each of 22 younger NK and SK speakers (16 females and 6 males in each group). Our findings reveal significant differences in the production of the vowels [æ], [ʌ], and [o] between the two varieties. Specifically, NK speakers maintained a distinction in height between the [e]–[æ] pair, a contrast that was not observed among SK speakers. Additionally, in NK, the [ʌ]–[o] pair showed considerable overlap (vowel merger) in both height and backness dimensions. These results shed light on the phonetic divergence between NK and SK varieties, offering insights into the acoustic features of NK vowel production. In further study, this understanding is crucial for supporting adaptation of NK refugees from the perspective of second dialect acquisition in South Korea.
Abstract
Previous studies have highlighted the linguistic divergence between North and South Korean varieties. Although acoustic differences between North and South Korean in vowel production have been prominently observed, the vowel production in the standard varieties of Pyongyang North Korean (NK) and Seoul South Korean (SK) has had limited investigation. This study aims to explore the phonetic differences in vowel production between NK and SK speakers across two speech styles: careful and conversational speech. We analyzed a total of 13,370 vowels from each of 22 younger NK and SK speakers (16 females and 6 males in each group). Our findings reveal significant differences in the production of the vowels [æ], [ʌ], and [o] between the two varieties. Specifically, NK speakers maintained a distinction in height between the [e]–[æ] pair, a contrast that was not observed among SK speakers. Additionally, in NK, the [ʌ]–[o] pair showed considerable overlap (vowel merger) in both height and backness dimensions. These results shed light on the phonetic divergence between NK and SK varieties, offering insights into the acoustic features of NK vowel production. In further study, this understanding is crucial for supporting adaptation of NK refugees from the perspective of second dialect acquisition in South Korea.
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