External lighting and sensing photoglottography: Characterization and MSePGG algorithm

Anne Bouvet (1) , Angélique Amelot (2) , Xavier Pelorson (1) , Shinji Maeda (2) , Annemie van Hirtum (1)

1 LEGI - Laboratoire des Écoulements Géophysiques et Industriels [Grenoble]
2 LPP - LPP - Laboratoire de Phonétique et Phonologie - UMR 7018

Continuous observation of the time-varying glottal area lacks a direct, quantitative, non-invasive measurement method despite its relevance to study breathing, speech production, swallowing, etc. External photoglottography (ePGG) relies on external glottal transillumination and sensing, it is therefore suitable for non-invasive and continuous observation. Nevertheless, a formalized relationship between ePGG signal and glottal area is lacking. The current paper proposes a Multi-Signal-ePGG (MSePGG) algorithm approach based on characterization of ePGG measurements under controlled conditions using mechanical glottal replicas. MSePGG accounts for main parameters affecting the ePGG signal: glottal area to be quantified and measurement conditions such as tissue properties and signal amplification. It is shown that MSePGG enables quantitative and continuous measurement of the time-varying glottal area on mechanical replicas. Application to a human subject is illustrated and discussed.

Domaines: Biomécanique [physics.med-ph]

Anne Bouvet, Angélique Amelot, Xavier Pelorson, Shinji Maeda, Annemie van Hirtum. External lighting and sensing photoglottography: Characterization and MSePGG algorithm. Biomedical Signal Processing and Control, 2019, 51, pp.318-327. ⟨10.1016/j.bspc.2019.01.014⟩. ⟨hal-02071478⟩