Document Type
Article
Publication Date
2025
Publication Title
International Journal on Disability and Human Development
Volume
24
Abstract
This study explored the fundamental frequency and the first and second formant frequencies of vowels produced in ventriloquial and normal speech. It tested whether these frequencies differ by speech type and vowels. Voice recordings were collected from a participant who produced words containing ten target English vowels in normal and ventriloquial speech. Digitized recordings were analyzed to determine formant frequencies. A multivariate analysis detected statistically significant differences in the three frequency measures across speech type. Speech type by frequency interaction was examined via overlapping vowel quadrilateral plots that explored differences in formants of vowels across speech type and the vowel space. The exploratory findings suggest differences in formant frequencies for some vowels by speech type, particularly that vowels are centralized in ventriloquial speech. Clinical intervention implications for individuals with head and neck cancers and trismus are discussed.
Issue
3
ISSN
2191-1231
Recommended Citation
Corrie S. Wiesner and Manish Rami. "Fundamental and formant frequencies of vowels in ventriloquial and normal speech" (2025). Communication Sciences & Disorders Faculty Publications. 10.
https://commons.und.edu/csd-fac/10