External lighting and sensing photoglottography: Characterization and MSePGG algorithm

Publication date: May 2019Source: Biomedical Signal Processing and Control, Volume 51Author(s): A. Bouvet, A. Amelot, X. Pelorson, S. Maeda, A. Van HirtumAbstractContinuous 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.
Source: Biomedical Signal Processing and Control - Category: Biomedical Science Source Type: research