{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,2,21]],"date-time":"2025-02-21T08:48:31Z","timestamp":1740127711683,"version":"3.37.3"},"reference-count":26,"publisher":"Acoustical Society of America (ASA)","issue":"5","funder":[{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["17H06313"],"award-info":[{"award-number":["17H06313"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["19H01002"],"award-info":[{"award-number":["19H01002"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["20K11875"],"award-info":[{"award-number":["20K11875"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2022,5,1]]},"abstract":"<jats:p>To examine the quasi-steady approximation of the glottal flow, widely used in the modeling of vocal fold oscillations, intraglottal pressure distributions were measured in a scaled-up static vocal fold model under time-varying flow conditions. The left and right vocal folds were slightly open and set to a symmetric and oblique configuration with a divergence angle. To realize time-varying flow conditions, the flow rate was sinusoidally modulated with a frequency of 2 and 10\u2009Hz, which correspond to 112.5 and 562.5\u2009Hz, respectively, in real life. Measurements of the intraglottal pressures under both steady and time-varying flows revealed that the pressure profiles of the time-varying flow conditions are non-distinguishable from those of the steady flow conditions as far as they have the same subglottal pressure as an input pressure. The air-jet separation point was also non-distinguishable between the steady and the time-varying flow conditions. Our study therefore suggests that the time-varying glottal flow can be approximated as a series of steady flow states with a matching subglottal pressure in the range of normal vocalization frequencies. Since the glottal closure was not taken into account in the present experiment, our argument is valid except for such a critical situation.<\/jats:p>","DOI":"10.1121\/10.0010451","type":"journal-article","created":{"date-parts":[[2022,5,10]],"date-time":"2022-05-10T12:22:32Z","timestamp":1652185352000},"page":"3129-3139","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":3,"title":["Experimental study on the quasi-steady approximation of glottal flows"],"prefix":"10.1121","volume":"151","author":[{"given":"Takuto","family":"Honda","sequence":"first","affiliation":[{"name":"Graduate School of Science and Engineering, Ritsumeikan University 1 , Noji\u2013higashi, Kusatsu, Shiga 525\u20138577, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mayuka","family":"Kanaya","sequence":"additional","affiliation":[{"name":"Graduate School of Science and Engineering, Ritsumeikan University 1 , Noji\u2013higashi, Kusatsu, Shiga 525\u20138577, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6212-0022","authenticated-orcid":false,"given":"Isao T.","family":"Tokuda","sequence":"additional","affiliation":[{"name":"Graduate School of Science and Engineering, Ritsumeikan University 1 , Noji\u2013higashi, Kusatsu, Shiga 525\u20138577, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anne","family":"Bouvet","sequence":"additional","affiliation":[{"name":"LEGI, UMR CNRS 5519, Grenoble Alpes University 2 , France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4949-4104","authenticated-orcid":false,"given":"Annemie","family":"Van Hirtum","sequence":"additional","affiliation":[{"name":"LEGI, UMR CNRS 5519, Grenoble Alpes University 2 , France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xavier","family":"Pelorson","sequence":"additional","affiliation":[{"name":"LEGI, UMR CNRS 5519, Grenoble Alpes University 2 , France"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"231","published-online":{"date-parts":[[2022,5,10]]},"reference":[{"issue":"3","key":"2023081003094393900_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. 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