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Using ultrasound and nasalance to separate oral and nasal contributions to formant frequencies of nasalized vowels

Carignan, C; (2018) Using ultrasound and nasalance to separate oral and nasal contributions to formant frequencies of nasalized vowels. Journal of the Acoustical Society of America , 143 (5) , Article 2588. 10.1121/1.5034760. Green open access

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Abstract

The experimental method described in this manuscript offers a possible means to address a well known issue in research on the independent effects of nasalization on vowel acoustics: given that the separate transfer functions associated with the oral and nasal cavities are merged in the acoustic signal, the task of teasing apart the respective effects of the two cavities seems to be an intractable problem. The proposed method uses ultrasound and nasalance to predict the effect of lingual configuration on formant frequencies of nasalized vowels, thus accounting for acoustic variation due to changing lingual posture and excluding its contribution to the acoustic signal. The results reveal that the independent effect of nasalization on the acoustic vowel quadrilateral resembles a counter-clockwise chain shift of nasal compared to non-nasal vowels. The results from the productions of 11 vowels by six speakers of different language backgrounds are compared to predictions presented in previous modeling studies, as well as discussed in the light of sound change of nasal vowel systems.

Type: Article
Title: Using ultrasound and nasalance to separate oral and nasal contributions to formant frequencies of nasalized vowels
Open access status: An open access version is available from UCL Discovery
DOI: 10.1121/1.5034760
Publisher version: https://doi.org/10.1121/1.5034760
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Acoustical properties; Musical instruments; Acoustical effects; Acoustic signal processing; Acoustic modeling, simulation and analysis; Organs; Ultrasound; Vowel systems; Speech analysis; Human voice
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Speech, Hearing and Phonetic Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/10081842
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