Kinematic model for simulating mucosal wave phenomena on vocal folds

Kumar, S. Pravin; Švec, Jan G.

doi:10.1016/j.bspc.2018.12.002

Cited by 14 publications

(5 citation statements)

References 61 publications

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“… A surface wave propagation limited to the medial-lateral direction for all silicone folds, with a reduced phase difference in the motions of the lower and upper margins. This is similar to what can be observed or simulated in the case of head/falsetto register (laryngeal mechanism M2 where only vocal-fold superficial layer vibrates) 110 . The cyclic pattern of the gelatin-based candidate exhibiting a “diamond-shaped” glottal aperture (see zoomed-in area in red), i.e., an index of the typical phase delay observed between the free edges of native vocal folds during modal voice 72 , 111 .…”

Section: Resultssupporting

confidence: 88%

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Flow-induced oscillations of vocal-fold replicas with tuned extensibility and material properties

Luizard,

Bailly,

Yousefi-Mashouf

et al. 2023

Sci Rep

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Human vocal folds are highly deformable non-linear oscillators. During phonation, they stretch up to 50% under the complex action of laryngeal muscles. Exploring the fluid/structure/acoustic interactions on a human-scale replica to study the role of the laryngeal muscles remains a challenge. For that purpose, we designed a novel in vitro testbed to control vocal-folds pre-phonatory deformation. The testbed was used to study the vibration and the sound production of vocal-fold replicas made of (i) silicone elastomers commonly used in voice research and (ii) a gelatin-based hydrogel we recently optimized to approximate the mechanics of vocal folds during finite strains under tension, compression and shear loadings. The geometrical and mechanical parameters measured during the experiments emphasized the effect of the vocal-fold material and pre-stretch on the vibration patterns and sounds. In particular, increasing the material stiffness increases glottal flow resistance, subglottal pressure required to sustain oscillations and vibratory fundamental frequency. In addition, although the hydrogel vocal folds only oscillate at low frequencies (close to 60 Hz), the subglottal pressure they require for that purpose is realistic (within the range 0.5–2 kPa), as well as their glottal opening and contact during a vibration cycle. The results also evidence the effect of adhesion forces on vibration and sound production.

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Section: Resultssupporting

confidence: 88%

Section: Resultssupporting

confidence: 88%

Flow-induced oscillations of vocal-fold replicas with tuned extensibility and material properties

Luizard,

Bailly,

Yousefi-Mashouf

et al. 2023

Sci Rep

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“…To the best of our knowledge, only few works study the MW propagation [46,144,146,170]. Future studies have to analyze in more detail the objective detection and quantification of MW propagation since its existence and magnitude provides valuable information about the coupling between the mucosa and the subjacent vocal folds muscle.…”

Section: Discussion and Future Directionsmentioning

confidence: 99%

“…Additionally, it is widely demonstrated that MW activity is a useful indicator of the quality of voice production and the presence of voice disorders. One possible solution to address these shortcomings, it could be created kinematics models that simulate the MW based on physical models and FP, similar that the one presented in [170]. In this way, it will be possible to explore the variations of the MW under different constraints.…”

Section: Discussion and Future Directionsmentioning

confidence: 99%

Laryngeal Image Processing of Vocal Folds Motion

et al. 2020

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This review provides a comprehensive compilation, from a digital image processing point of view of the most important techniques currently developed to characterize and quantify the vibration behaviour of the vocal folds, along with a detailed description of the laryngeal image modalities currently used in the clinic. The review presents an overview of the most significant glottal-gap segmentation and facilitative playbacks techniques used in the literature for the mentioned purpose, and shows the drawbacks and challenges that still remain unsolved to develop robust vocal folds vibration function analysis tools based on digital image processing.

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“…Additionally, the PDOS model was used to synthesize GAWs of diplophonic phonations in the absence of modulations [14]. The kinematic model of the mucosal wave by Kumar et al can also be understood as an extension to the PDOS model, since it uses a multitude of surface points instead of only two margins, and includes vertical components of vibration [15]. The Fourier transform was applied to pixelintensity time series of laryngeal high-speed videos to obtain false color images of vibration frequency [16], [17].…”

Section: Related Work On Vocal Fold Modeling and Speech Synthesismentioning

confidence: 99%