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• W2958643452 abstract "Acoustic differences in the phonated sounds made by men and women are related to laryngeal and vocal tract structural differences. This model-based study explored how typical vocal fold differences between males and females affect intraglottal pressure distributions under conditions of different glottal angles and transglottal pressures, and thus how they may affect phonation. The computational code ANSYS Fluent 6.3 was used to obtain the pressure distributions and other aerodynamic parameters for laminar, incompressible flow. Typical values of the vocal fold length, the vertical glottal duct length, and the lateral vocal fold tissue depth were selected both for males and females under conditions of nine typical convergent/divergent glottal angles and three transglottal pressures. There was no coupling of the upstream or downstream vocal tracts, and also no vocal fold contact in these two-dimensional static glottal geometries. Results suggest that males tend to have greater intraglottal pressures for the convergent glottal shape that occurs during glottal opening, and the male glottis offers less flow resistance than the female glottis. These results suggest that the male vocal folds may vibrate more easily (ie, with lower transglottal pressure) but the tissue differences may nullify such an hypothesis. Also, the peak velocities in the glottis were dependent on the transglottal pressure driving the flow and the minimal glottal diameter, which were the same for both the male and female larynxes, rather than on the inferior-superior length of the glottis or the anterior-posterior glottal length. In addition, the tangential forces for larger glottal convergent angles was significantly greater in the female larynx. The entrance loss coefficients, however, were similar between the male and female larynxes, except for the uniform glottis for which the values were larger for the male larynx. The results suggest that the structural differences between male and female vocal folds should be well specified when building computational and physical models of the larynx." @default.
• W2958643452 created "2019-07-23" @default.
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• W2958643452 date "2020-11-01" @default.
• W2958643452 modified "2023-10-18" @default.
• W2958643452 title "Intraglottal Pressure: A Comparison Between Male and Female Larynxes" @default.
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• W2958643452 doi "https://doi.org/10.1016/j.jvoice.2019.06.005" @default.
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