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Updated: Mar 31, 2026

Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody
Published on: September 27, 2024
Intrinsic fundamental frequency of vowels is moderated by regional dialect
Ewa Jacewicz1, Robert Allen Fox1
1Department of Speech and Hearing Science, The Ohio State University, 1070 Carmack Road, Columbus, Ohio 43210, USA jacewicz.1@osu.edu, fox.2@osu.edu.
Abstract:
There has been a long-standing debate whether the intrinsic fundamental frequency (IF0) of vowels is an automatic consequence of articulation or whether it is independently controlled by speakers to perceptually enhance vowel contrasts along the height dimension. This paper provides evidence from regional variation in American English that IF0 difference between high and low vowels is, in part, controlled and varies across dialects. The sources of this F0 control are socio-cultural and cannot be attributed to differences in the vowel inventory size. The socially motivated enhancement was found only in prosodically prominent contexts.
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