{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T23:13:45Z","timestamp":1792710825384,"version":"4.5.0"},"reference-count":14,"publisher":"Acoustical Society of America (ASA)","issue":"3","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2008,9,1]]},"abstract":"<jats:p>The influence of flow separation location on eigenmode synchronization and phonation onset was investigated in a two-dimensional, aeroelastic, continuum model of phonation. A linear stability analysis showed that flow separation played a critical role in initiating eigenmode synchronization and phonation. For a given glottal configuration, a small variation in the flow separation location along the vocal fold surface may lead to a qualitatively different eigenmode-synchronization pattern, and different phonation threshold pressure and frequency. This high sensitivity suggests a need for phonation models to be capable of accurate prediction of the flow separation location. Analysis with different glottal channel geometries showed that a minimum phonation threshold pressure existed for a rectangular glottal channel, consistent with previous experiments. However, in contrast to previous theoretical analyses, this study showed that phonation was facilitated, rather than prohibited, by the upstream movement of the flow separation point within a divergent glottis.<\/jats:p>","DOI":"10.1121\/1.2957938","type":"journal-article","created":{"date-parts":[[2008,9,19]],"date-time":"2008-09-19T15:31:41Z","timestamp":1221838301000},"page":"1689-1694","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":31,"title":["Influence of flow separation location on phonation onset"],"prefix":"10.1121","volume":"124","author":[{"given":"Zhaoyan","family":"Zhang","sequence":"first","affiliation":[{"name":"UCLA School of Medicine , 31-24 Rehabilitation Center, 1000 Veteran Avenue, Los Angeles, California 90095-1794"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"231","reference":[{"key":"2023072009034556800_c1","doi-asserted-by":"publisher","first-page":"1710","DOI":"10.1121\/1.1779274","article-title":"Flow separation in a computational oscillating vocal fold model","volume":"116","year":"2004","journal-title":"J. Acoust. Soc. Am."},{"key":"2023072009034556800_c2","doi-asserted-by":"publisher","first-page":"2008","DOI":"10.1121\/1.427947","article-title":"Viscoelastic shear properties of human vocal fold mucosa: measurement methodology and empirical results","volume":"106","year":"1999","journal-title":"J. Acoust. Soc. Am."},{"key":"2023072009034556800_c3","doi-asserted-by":"publisher","first-page":"3722","DOI":"10.1121\/1.418331","article-title":"Further studies of phonation threshold pressure in a physical model of the vocal fold mucosa","volume":"101","year":"1997","journal-title":"J. Acoust. Soc. Am."},{"key":"2023072009034556800_c5","first-page":"231","article-title":"Equivalent lumped-mass models of vocal fold vibration","volume-title":"Vocal Fold Physiology","author":"Steven","year":"1981"},{"key":"2023072009034556800_c6","doi-asserted-by":"crossref","first-page":"1233","DOI":"10.1002\/j.1538-7305.1972.tb02651.x","article-title":"Synthesis of voiced sounds from a two-mass model of the vocal cords","volume":"51","year":"1972","journal-title":"Bell Syst. Tech. J."},{"key":"2023072009034556800_c7","doi-asserted-by":"publisher","first-page":"380","DOI":"10.1115\/1.2187042","article-title":"Flow visualization and acoustic consequences of the air moving through a static model of the human larynx","volume":"128","year":"2006","journal-title":"J. Biomech. Eng."},{"key":"2023072009034556800_c8","first-page":"1135","article-title":"A symmetrical two-mass vocal-fold model coupled to vocal tract and trachea, with application to prosthesis design","volume":"84","year":"1998","journal-title":"Acust. Acta Acust."},{"key":"2023072009034556800_c9","doi-asserted-by":"publisher","first-page":"151","DOI":"10.1016\/S0892-1997(98)80034-9","article-title":"Optimal glottal configuration for ease of phonation","volume":"12","year":"1998","journal-title":"J. Voice"},{"key":"2023072009034556800_c11","doi-asserted-by":"publisher","first-page":"3416","DOI":"10.1121\/1.411449","article-title":"Theoretical and experimental study of quasi-steady flow separation within the glottis during phonation. Application to a modified two-mass model","volume":"96","year":"1994","journal-title":"J. Acoust. Soc. Am."},{"key":"2023072009034556800_c12","doi-asserted-by":"publisher","first-page":"1616","DOI":"10.1121\/1.1333420","article-title":"Intraglottal pressure profiles for a symmetric and oblique glottis with a divergence angle of 10degrees","volume":"109","year":"2001","journal-title":"J. Acoust. Soc. Am."},{"key":"2023072009034556800_c13","doi-asserted-by":"crossref","first-page":"42","DOI":"10.1016\/j.euromechflu.2007.06.004","article-title":"Solving for unsteady airflow in a glottal model with immersed moving boundaries","volume":"27","year":"2008","journal-title":"Eur. J. Mech. B\/Fluids"},{"key":"2023072009034556800_c16","doi-asserted-by":"publisher","first-page":"1720","DOI":"10.1121\/1.1779331","article-title":"Sound generation by steady flow through glottis-shaped orifices","volume":"116","year":"2004","journal-title":"J. Acoust. Soc. Am."},{"issue":"4","key":"2023072009034556800_c17","doi-asserted-by":"publisher","first-page":"2279","DOI":"10.1121\/1.2773949","article-title":"Physical mechanisms of phonation onset: a linear stability analysis of an aeroelastic continuum model of phonation","volume":"122","year":"2007","journal-title":"J. Acoust. Soc. Am."},{"key":"2023072009034556800_c18","doi-asserted-by":"publisher","first-page":"2134","DOI":"10.1121\/1.1506693","article-title":"Computational aeroacoustics of phonation, Part I: Computational methods and sound generation mechanisms","volume":"112","year":"2002","journal-title":"J. Acoust. Soc. Am."}],"updated-by":[{"DOI":"10.1121\/1.3473699","type":"correction","label":"Correction","source":"publisher","updated":{"date-parts":[[2010,9,3]],"date-time":"2010-09-03T00:00:00Z","timestamp":1283472000000}}],"container-title":["The Journal of the Acoustical Society of America"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/pubs.aip.org\/asa\/jasa\/article-pdf\/124\/3\/1689\/15288111\/1689_1_online.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/pubs.aip.org\/asa\/jasa\/article-pdf\/124\/3\/1689\/15288111\/1689_1_online.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,7,20]],"date-time":"2023-07-20T09:05:20Z","timestamp":1689843920000},"score":1,"resource":{"primary":{"URL":"https:\/\/pubs.aip.org\/jasa\/article\/124\/3\/1689\/676157\/Influence-of-flow-separation-location-on-phonation"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2008,9,1]]},"references-count":14,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2008,9,1]]}},"URL":"https:\/\/doi.org\/10.1121\/1.2957938","relation":{},"ISSN":["0001-4966","1520-8524"],"issn-type":[{"value":"0001-4966","type":"print"},{"value":"1520-8524","type":"electronic"}],"subject":[],"published-other":{"date-parts":[[2008,9]]},"published":{"date-parts":[[2008,9,1]]}}}