Formant Frequencies and Bandwidths in Relation to Clinical Variables in an Obstructive Sleep Apnea Population

Journal of Voice : Official Journal of the Voice Foundation
Ana Montero BenavidesLuis A Hernández Gómez

Abstract

We investigated whether differences in formants and their bandwidths, previously reported comparing small sample population of healthy individuals and patients with obstructive sleep apnea (OSA), are detected on a larger population representative of a clinical practice scenario. We examine possible indirect or mediated effects of clinical variables, which may shed some light on the connection between speech and OSA. In a retrospective study, 241 male subjects suspected to suffer from OSA were examined. The apnea-hypopnea index (AHI) was obtained for every subject using overnight polysomnography. Furthermore, the clinical variables usually reported as predictors of OSA, body mass index (BMI), cervical perimeter, height, weight, and age, were collected. Voice samples of sustained phonations of the vowels /a/, /e/, /i/, /o/, and /u/ were recorded. Formant frequencies F1, F2, and F3 and bandwidths BW1, BW2, and BW3 of the sustained vowels were determined using spectrographic analysis. Correlations among AHI, clinical parameters, and formants and bandwidths were determined. Correlations between AHI and clinical variables were stronger than those between AHI and voice features. AHI only correlates poorly with BW2 of /a/ and BW3 of /e...Continue Reading

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Citations

Feb 22, 2016·Biomedical Engineering Online·Fernando Espinoza-CuadrosLuis A Hernández-Gómez
Jul 6, 2016·Journal of Voice : Official Journal of the Voice Foundation·Ana Montero Benavides
Nov 8, 2017·JMIR MHealth and UHealth·Marina TyanLuis Alfonso Hernandez Gomez
Dec 15, 2015·Computational and Mathematical Methods in Medicine·Fernando Espinoza-CuadrosLuis A Hernández-Gómez
Jan 24, 2021·Sleep & Breathing = Schlaf & Atmung·Lucia Zamora-MolinaEduardo Garcia-Pachon

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