Analysis of phonation onsets in vowel production, using information from glottal area and flow estimate

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2019-05-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
24
55-65
Series
Speech Communication, Volume 109
Abstract
A multichannel dataset comprising high-speed videoendoscopy images, and electroglottography and free-field microphone signals, was used to investigate phonation onsets in vowel production. Use of the multichannel data enabled simultaneous analysis of the two main aspects of phonation, glottal area, extracted from the high-speed videoendoscopy images, and glottal flow, estimated from the microphone signal using glottal inverse filtering. Pulse-wise parameterization of the glottal area and glottal flow indicate that there is no single dominant way to initiate quasi-stable phonation. The trajectories of fundamental frequency and normalized amplitude quotient, extracted from glottal area and estimated flow, may differ markedly during onsets. The location and steepness of the amplitude envelopes of the two signals were observed to be closely related, and quantitative analysis supported the hypothesis that glottal area and flow do not carry essentially different amplitude information during vowel onsets. Linear models wereused to predict the phonation onset times from the characteristics of the subsequent steady phonation. The phonation onset time of glottal area was found to have good predictability from a combination of the fundamental frequency and the normalized amplitude quotient of the glottal flow, as well as the gender of the speaker. For the phonation onset time of glottal flow, the best linear model was obtained using the fundamental frequency and the normalized amplitude quotient of the glottal flow as predictors.
Description
Keywords
phonation onset, vowel production, high-speed videoendoscopy, glottal inverse filtering
Other note
Citation
Murtola , T , Malinen , J , Geneid , A & Alku , P 2019 , ' Analysis of phonation onsets in vowel production, using information from glottal area and flow estimate ' , Speech Communication , vol. 109 , pp. 55-65 . https://doi.org/10.1016/j.specom.2019.03.007