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For clinical and voice training applications, the primary focus is on two airway conditions, an oral semi-occlusion and a semi-occlusion above the vocal folds. Laryngeal airflow resistance is divided into glottal airflow resistance and epilaryngeal airway resistance. Maximum aerodynamic power is transferred to the vocal tract if the glottal airflow resistance is reduced while the epilaryngeal airway resistance is increased. A semi-occlusion at the lips helps to set up this condition. For the acoustic power transfer, the epilaryngeal airway also serves to match the impedance of the source to the impedance of the vocal tract.<\/jats:p>","DOI":"10.1121\/10.0005124","type":"journal-article","created":{"date-parts":[[2021,6,14]],"date-time":"2021-06-14T17:50:52Z","timestamp":1623693052000},"page":"4106-4118","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":13,"title":["Regulation of laryngeal resistance and maximum power transfer with semi-occluded airway vocalization"],"prefix":"10.1121","volume":"149","author":[{"given":"Ingo R.","family":"Titze","sequence":"first","affiliation":[{"name":"Utah Center for Vocology, University of Utah , Salt Lake City, Utah 84112 USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"231","published-online":{"date-parts":[[2021,6,14]]},"reference":[{"issue":"5","key":"2023080720013760300_c1","doi-asserted-by":"publisher","first-page":"2762","DOI":"10.1121\/1.4777650","article-title":"Effects of false vocal fold width on translaryngeal flow resistance","volume":"110","year":"2001","journal-title":"J. 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