External lighting and sensing photoglottography: Characterization and MSePGG algorithm

Bouvet, Anne; Amelot, Angélique; Pelorson, Xavier; Maeda, Satoshi; Hirtum, Annemie van

doi:10.1016/j.bspc.2019.01.014

Cited by 2 publications

(2 citation statements)

References 22 publications

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“…Clinical UVFP examinations often reveal an air escape due to left-right VF asymmetries with respect to VF's shape, tension and positioning [1,4,5]. Despite the continuous advancement of measurement techniques [6,7,8,9] quantitative accurate in-vivo clinical data assessment on human speakers remains tedious, which hampers a systematic assessment of the influence of these asymmetries on voice properties. As a result, a consensus concerning the definition, diagnosis and hence treatment of UVFP remains yet to be achieved [3].…”

Section: Introductionmentioning

confidence: 99%

Imaging of auto-oscillating vocal folds replicas with left–right level difference due to angular asymmetry

Bouvet

Tokuda

Pelorson

et al. 2021

Biomedical Signal Processing and Control

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Vertical level difference due to vertical angular asymmetry (up to 20 • ) between the normal (right) and tilted (left) vocal fold (VF) is experimentally assessed in the framework of unilateral vocal fold paralysis. The upstream pressure and high-speed vibration imaging for different camera view angles are assessed during steady-state auto-oscillation of three different mechanical VF replicas. A global image-based correlation allows to assess the oscillation frequency independently from the camera view angle. Resulting oscillation frequencies matches the ones obtained from aerodynamic data. Mean vibration cycles obtained from videokymographic line-scans at different positions along the posterior-anterior direction are analysed. Left-right VF displacement phase difference, axis shift and left-right mucosal wave phase difference are identified as essential parameters quantifying angular asymmetry. The influence of the degree of angular asymmetry, scan position and replica is discussed.

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Section: Introductionmentioning

confidence: 99%

Imaging of auto-oscillating vocal folds replicas with left–right level difference due to angular asymmetry

Bouvet

Tokuda

Pelorson

et al. 2021

Biomedical Signal Processing and Control

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“…An elaborate transimpedance amplifier with a lock-in amplifier was used for higher-gain and lower-noise performances. Besides us, Suthau and Bouvet et al reported their versions of ePGG [17]- [19]. So far, the ePGG has been applied in analyzing consonant production in Korean and Chinese [20]- [22].…”

Section: Introductionmentioning

confidence: 99%

Portable Photoglottography for Monitoring Vocal Fold Vibrations in Speech Production

Chi

Honda

Wei

2021

ICASSP 2021 - 2021 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

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Photoglottography (PGG) is an effective method to monitor vocal fold vibrations via measuring light transmission across the glottis. The difficulty in operation however limits its wide use in speech studies. This paper is to realize a portable PGG (P-PGG) module with an audio interface to record glottal and speech waveforms simultaneously with ease. Near Infrared (NIR) LEDs are driven as a light source and an extremely high-gain photodetector circuit is employed. The output PGG signal is subsequently band-pass filtered and amplified for recording. The whole system is minimized, battery powered with well-controlled heat radiation. In experiments, P-PGG, EGG and microphone are worn together by speakers. The results verify that the NIR lighting P-PGG is successful at recording complete information of glottal cycles in comparison to EGG. Thus, the P-PGG is an effective method for investigating phonation types and consonant-vowel interactions in speech.

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External lighting and sensing photoglottography: Characterization and MSePGG algorithm

Cited by 2 publications

References 22 publications

Imaging of auto-oscillating vocal folds replicas with left–right level difference due to angular asymmetry

Imaging of auto-oscillating vocal folds replicas with left–right level difference due to angular asymmetry

Portable Photoglottography for Monitoring Vocal Fold Vibrations in Speech Production

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