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Simulations highlight the existence of three distinct regimes, named A,\u2009B, and C, depending on the degree of abduction of the glottis. They are characterized by the frication noise level: A exhibits a low frication noise level, B, which is a transitional unstable regime, is a mixed noise\/voice signal, and C contains only frication noise. They have significant impacts on the first spectral moments. Simulations show that their boundaries depend on articulatory and glottal configurations. The transition regime B is shown to be unstable: it requires very specific configurations in comparison with other regimes, and acoustic features are very sensitive to small perturbations of the glottal configuration abduction in this regime.<\/jats:p>","DOI":"10.1121\/1.5000232","type":"journal-article","created":{"date-parts":[[2017,9,7]],"date-time":"2017-09-07T19:22:05Z","timestamp":1504812125000},"page":"1303-1317","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":9,"title":["Acoustic impact of the gradual glottal abduction degree on the production of fricatives: A numerical study"],"prefix":"10.1121","volume":"142","author":[{"given":"Benjamin","family":"Elie","sequence":"first","affiliation":[{"name":"Laboratoire Lorrain de Recherche en Informatique et ses Applications, l'Institut National de Recherche en Informatique et en Automatique, Centre National de la Recherche Scientifique, Universit\u00e9 de Lorraine , Vandoeuvre-les-Nancy, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yves","family":"Laprie","sequence":"additional","affiliation":[{"name":"Laboratoire Lorrain de Recherche en Informatique et ses Applications, l'Institut National de Recherche en Informatique et en Automatique, Centre National de la Recherche Scientifique, Universit\u00e9 de Lorraine , Vandoeuvre-les-Nancy, France"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"231","published-online":{"date-parts":[[2017,9,7]]},"reference":[{"key":"2023071710043063500_c1","first-page":"543","volume-title":"Acoustic Phonetics","year":"1998"},{"key":"2023071710043063500_c2","doi-asserted-by":"publisher","first-page":"1252","DOI":"10.1121\/1.1288413","article-title":"Acoustic characteristics of English fricatives","volume":"108","year":"2000","journal-title":"J. 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