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Instantaneous orifice discharge coefficient values were found to undergo a cyclic hysteresis loop when plotted versus Reynolds number and time, indicating a pressure head increase and a net energy transfer from the air flow to the orifice wall. The net energy transferred was estimated to be around 10% of the value presumably required to achieve self-sustained oscillation. The radiated sound pressure was measured to characterize the influence of the minimum flow through the posterior gap on the broadband component of the radiated sound. The presence of a posterior gap was found to significantly increase the broadband sound level produced over the frequency range in which human hearing is most sensitive.<\/jats:p>","DOI":"10.1121\/1.2945116","type":"journal-article","created":{"date-parts":[[2008,8,5]],"date-time":"2008-08-05T22:35:14Z","timestamp":1217975714000},"page":"1171-1179","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":15,"title":["Experimental investigation of the influence of a posterior gap on glottal flow and sound"],"prefix":"10.1121","volume":"124","author":[{"given":"Jong Beom","family":"Park","sequence":"first","affiliation":[{"name":"McGill University Department of Mechanical Engineering, , 817 Sherbrooke Street West, Montreal, Quebec H3A 2K6, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luc","family":"Mongeau","sequence":"additional","affiliation":[{"name":"McGill University Department of Mechanical Engineering, , 817 Sherbrooke Street West, Montreal, Quebec H3A 2K6, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"231","reference":[{"key":"2023072804053719900_c1","first-page":"319","article-title":"Anatomic correlation for muscle tension dysphonia","volume":"12","year":"1983","journal-title":"J. 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