How much loading does cough pose on the vocal folds? Preliminary high speed image analysis comparing coughing and phonation

0549843 - ÚT 2023 RIV IT eng C - Conference Paper (international conference)
Horáček, Jaromír - Bula, Vítězslav - Geneid, A. - Radolf, Vojtěch - Laukkanen, A. M.
How much loading does cough pose on the vocal folds? Preliminary high speed image analysis comparing coughing and phonation.
Models and Analysis of Vocal Emissions for Biomedical Applications. Firenze: Firenze University Press, 2021 - (Manfredi, C.), s. 109-112. ISBN 978-88-5518-448-9. ISSN 2704-601X. E-ISSN 2704-5846.
[International workshop Models and Analysis of Vocal Emissions for Biomedical Applications /12./. Firenze (IT), 14.12.2021-16.12.2021]
R&D Projects: GA ČR(CZ) GA19-04477S
Institutional support: RVO:61388998
Keywords : glottal area * EGG * oral air pressure * laryngeal movement * coughing therapy
OECD category: Acoustics
https://fupress.com/catalogo/models-and-analysis-of-vocal-emissions-for-biomedical-applications/7364

Coughing offers a risk for voice problems by increasing vocal loading. This study estimates loading by measuring glottal area variation from high speed images and subglottic pressure from oral pressure Poral. Phonation on [o:] and coughing at the same Poral (6 Pa) and SPL (93 dB6cm) were compared from one healthy male. In coughing, the glottal width (GW) at the middle of vocal folds (VFs) was 25% larger. GW measured at VF processes was almost unchanged. Maximum glottal opening velocity dGW/dt was nearly 40% higher, maximum glottal declination rate (MWDR) was up to 3 times higher, and MWDR at vocal processes was 13% higher. The acceleration and deceleration values for VFs were 40% and 47% higher, respectively. Fo in the last part of coughing decreased from f0=222 Hz to 77 Hz at phonation offset. In [o:] f0 was 116 Hz. Closed quotient CQ≅0.50 in coughing was close to CQ=0.47 in vowel. Vibration frequency of the false vocal folds (FVFs) registered in the first, rough part of coughing, was 293 Hz. Peak-to-peak value of Poral increased 5.4 times in coughing. During vibration of FVFs in coughing, mean Poral increased from 6 Pa to 70 Pa and Poral p-t-p increased 2.45 times.
Permanent Link: http://hdl.handle.net/11104/0329124