Flow-induced oscillations of vocal-fold replicas with tuned extensibility and material properties
Abstract 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...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-12-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-48080-x |
| _version_ | 1797274515889192960 |
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| author | Paul Luizard Lucie Bailly Hamid Yousefi-Mashouf Raphaël Girault Laurent Orgéas Nathalie Henrich Bernardoni |
| author_facet | Paul Luizard Lucie Bailly Hamid Yousefi-Mashouf Raphaël Girault Laurent Orgéas Nathalie Henrich Bernardoni |
| author_sort | Paul Luizard |
| collection | DOAJ |
| description | Abstract 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. |
| first_indexed | 2024-03-07T14:59:30Z |
| format | Article |
| id | doaj.art-789a731c10b141bd9fa81b8e2342f59c |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-07T14:59:30Z |
| publishDate | 2023-12-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-789a731c10b141bd9fa81b8e2342f59c2024-03-05T19:13:38ZengNature PortfolioScientific Reports2045-23222023-12-0113111910.1038/s41598-023-48080-xFlow-induced oscillations of vocal-fold replicas with tuned extensibility and material propertiesPaul Luizard0Lucie Bailly1Hamid Yousefi-Mashouf2Raphaël Girault3Laurent Orgéas4Nathalie Henrich Bernardoni5Univ. Grenoble Alpes, CNRS, Grenoble INP, GIPSA-labUniv. Grenoble Alpes, CNRS, Grenoble INP, 3SRUniv. Grenoble Alpes, CNRS, Grenoble INP, GIPSA-labUniv. Grenoble Alpes, CNRS, Grenoble INP, GIPSA-labUniv. Grenoble Alpes, CNRS, Grenoble INP, 3SRUniv. Grenoble Alpes, CNRS, Grenoble INP, GIPSA-labAbstract 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.https://doi.org/10.1038/s41598-023-48080-x |
| spellingShingle | Paul Luizard Lucie Bailly Hamid Yousefi-Mashouf Raphaël Girault Laurent Orgéas Nathalie Henrich Bernardoni Flow-induced oscillations of vocal-fold replicas with tuned extensibility and material properties Scientific Reports |
| title | Flow-induced oscillations of vocal-fold replicas with tuned extensibility and material properties |
| title_full | Flow-induced oscillations of vocal-fold replicas with tuned extensibility and material properties |
| title_fullStr | Flow-induced oscillations of vocal-fold replicas with tuned extensibility and material properties |
| title_full_unstemmed | Flow-induced oscillations of vocal-fold replicas with tuned extensibility and material properties |
| title_short | Flow-induced oscillations of vocal-fold replicas with tuned extensibility and material properties |
| title_sort | flow induced oscillations of vocal fold replicas with tuned extensibility and material properties |
| url | https://doi.org/10.1038/s41598-023-48080-x |
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