Cross-Linguistic Influence on Nasalance in Vietnamese-English Bilingual Speakers: Why Is Nasalance Higher for the Vowel/a/ Than /i/?

Purpose: Previous studies have reported higher nasalance values for the vowel /a/ compared to /i/ in Vietnamese-speaking children and adults. This study aims to determine whether the same pattern is present in Vietnamese-English bilingual speakers and whether their nasalance scores align more closel...

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Publicado en:Journal of Speech, Language & Hearing Research Vol. 69; no. 1; pp. 79 - 97
Autores principales: Lee, Sue Ann S., Tam Minh Nguyen-Phuoc, Duc Minh Nguyen
Formato: Artículo
Publicado: American Speech-Language-Hearing Association Jan2026
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Acceso en línea:Ver este registro en EBSCOhost
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      dt: Jan2026
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      pub: American Speech-Language-Hearing Association
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        10.1044/2025_JSLHR-25-00310
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        atl: Cross-Linguistic Influence on Nasalance in Vietnamese-English Bilingual Speakers: Why Is Nasalance Higher for the Vowel/a/ Than /i/?
      aug:
        au:
          Lee, Sue Ann S.
          Tam Minh Nguyen-Phuoc
          Duc Minh Nguyen
        affil:
          Cleft Palate and Craniofacial Anomaly Clinic, Texas Tech University Health Sciences Center, Lubbock
          Ph.D. program in Rehabilitation Science, Department of Speech-Language-Hearing Sciences, Texas Tech University Health Sciences Center, Lubbock
          Hue University of Medicine and Pharmacy, Vietnam
          School of Odonto-Stomatology, Hanoi Medical University, Vietnam
      su:
        Ethnology research
        Multilingualism
        Phonetics
        Language acquisition
        Vowels
        Data analysis
        Two-way analysis of variance
        Physiological aspects of speech
        Statistics
        English language
        Human voice
        Data analysis software
      sug:
        subj:
          Ethnology research
          Multilingualism
          Phonetics
          Language acquisition
          Vowels
          Data analysis
          Two-way analysis of variance
          Physiological aspects of speech
          Statistics
          English language
          Human voice
          Data analysis software
      ab: Purpose: Previous studies have reported higher nasalance values for the vowel /a/ compared to /i/ in Vietnamese-speaking children and adults. This study aims to determine whether the same pattern is present in Vietnamese-English bilingual speakers and whether their nasalance scores align more closely with those of monolingual Vietnamese or monolingual English speakers. Method: Sixteen Vietnamese-English bilingual adults participated in the study. Nasalance data of 16 monolingual Vietnamese speakers and 16 monolingual English speakers were adopted from the author's previous studies. Nasalance scores were obtained for three prolonged vowels; syllables; and oral, oral-nasal, and nasal passages in both English and Vietnamese. Results: Vietnamese-English bilingual speakers exhibited higher nasalance scores for the prolonged vowel /a/ compared to /i/. However, no significant differences were observed between the two vowels in the syllable context. For between-group comparisons, the bilingual speakers produced lower nasalance scores for prolonged vowels /a/ and /i/, syllables with /a/ vowel context, and all three Vietnamese passages, compared to Vietnamese monolinguals. However, the bilinguals' scores were similar to those of English monolinguals for all stimuli, except for /a/. Conclusions: The nasalance scores of Vietnamese-English bilinguals more closely resembled those of monolingual English speakers, suggesting an influence of the second language on resonance domain. However, the higher nasalance score of /a/ compared to /i/ indicates that bilingual speakers retain native resonance characteristics when other linguistic factors are minimized. These findings contribute to our understanding of cross-linguistic influences on nasalance and provide important insight for clinical assessment in Vietnamesespeaking populations in the United States.
      pubtype: Academic Journal
      doctype: Article
      src: R
    language: English
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