Cross-linguistic f0 differences in bilingual speakers of English and Korean

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.