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The inclusion of posterior gap areas of 0.03\u20130.1\u2009cm2 reduced the energy transfer from the fluid to the vocal folds by more than 42%\u201380% and the radiated sound pressure level by 6\u201314\u2009dB, respectively. The model was used to simulate vocal hyperfucntion, i.e., patterns of vocal misuse\/abuse associated with many of the most common voice disorders. In this first approximation, vocal hyperfunction was modeled by introducing a compensatory increase in lung air pressure to regain the vocal loudness level that was produced prior to introducing a large glottal gap. This resulted in a significant increase in maximum flow declination rate and amplitude of unsteady flow, thereby mimicking clinical studies. The amplitude of unsteady flow was found to be linearly correlated with collision forces, thus being an indicative measure of vocal hyperfunction.<\/jats:p>","DOI":"10.1121\/1.4901714","type":"journal-article","created":{"date-parts":[[2014,12,4]],"date-time":"2014-12-04T13:17:50Z","timestamp":1417699070000},"page":"3262-3271","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":74,"title":["Modeling the effects of a posterior glottal opening on vocal fold dynamics with implications for vocal hyperfunction"],"prefix":"10.1121","volume":"136","author":[{"given":"Mat\u00edas","family":"Za\u00f1artu","sequence":"first","affiliation":[{"name":"Universidad T\u00e9cnica Federico Santa Mar\u00eda Department of Electronic Engineering, , Valpara\u00edso, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gabriel E.","family":"Galindo","sequence":"additional","affiliation":[{"name":"Universidad T\u00e9cnica Federico Santa Mar\u00eda Department of Electronic Engineering, , Valpara\u00edso, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Byron D.","family":"Erath","sequence":"additional","affiliation":[{"name":"Clarkson University Department of Mechanical and Aeronautical Engineering, , Potsdam, New York 13699"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sean D.","family":"Peterson","sequence":"additional","affiliation":[{"name":"University of Waterloo Department of Mechanical and Mechatronics Engineering, , Waterloo, Ontario N2L 3G1, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"George R.","family":"Wodicka","sequence":"additional","affiliation":[{"name":"Purdue University Weldon School of Biomedical Engineering, , West Lafayette, Indiana 47907"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert E.","family":"Hillman","sequence":"additional","affiliation":[{"name":"Center for Laryngeal Surgery and Voice Rehabilitation, Massachusetts General Hospital , Boston, Massachusetts 02114"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"231","reference":[{"key":"2023073101570858200_c1","doi-asserted-by":"publisher","first-page":"1209","DOI":"10.1044\/jshr.3506.1209","article-title":"Glottal gap configurations in two age groups of women","volume":"35","year":"1992","journal-title":"J. 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