Languages may differ in fundamental frequency of voicing (f0), even when they are spoken by a bilingual individual. However, little is known in bilingual/L2 acquisition research about simultaneous bilinguals. With the expectation that speakers who acquired two languages early use f0 differently for each language, this study measured f0 in English–Korean early bilinguals' natural speech. The f0 level was higher for Korean than English, regardless of gender, age, or generational status (early and late bilinguals did not differ). The f0 span showed a language-gender interaction: males' span was larger in Korean, while females' span was larger in English. This study demonstrates that languages differ in f0 independent of speaker anatomy and suggests that children may acquire these differences in early childhood.
A phonetic study of the vowel spaces of 535 young speakers of Californian English showed that participation in the California Vowel Shift, a sound change unique to the West Coast region of the United States, varied depending on the speaker's selfidentified ethnicity. For example, the fronting of the pre-nasal hand vowel varied by ethnicity, with White speakers participating the most and Chinese and South Asian speakers participating less. In another example, Korean and South Asian speakers of Californian English had a more fronted foot vowel than the White speakers. Overall, the study confirms that CVS is present in almost all young speakers of Californian English, although the degree of participation for any individual speaker is variable on account of several interdependent social factors.
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