{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,10,23]],"date-time":"2023-10-23T17:20:28Z","timestamp":1698081628192},"reference-count":0,"publisher":"Acoustical Society of America (ASA)","issue":"3","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[1989,9,1]]},"abstract":"<jats:p>Individuals with congenital velopharyngeal impairment generally maintain adequate levels of intraoral pressures during consonant production by increasing respiratory effort. The purpose of the present study was to determine if normal individuals respond to a decrease in velopharyngeal resistance in a similar way. The velar mechanism was perturbed by having subjects voluntarily lower the soft palate during a series of words involving plosive consonants. The pressure-flow technique was used to measure oral pressures, calculate velopharyngeal orifice resistance, and estimate velopharyngeal orifice area. Inductive plethysmography was used to measure breathing volumes associated with the words. The data indicate that, in most instances, intraoral pressure remained at appropriate levels (&amp;gt;3.0 cm H2O) after velar lowering. Speech breathing volume did not change during inspiration, but increased during speech expiration when the velopharyngeal port was open. The difference was statistically significant (p&amp;lt;0.01). Duration of the utterance did not change across conditions. A mechanical model was then used to determine how intraoral pressure would be affected by simulating the same conditions in a passive system. The modeling data revealed that pressure would drop threefold. It was concluded that increased respiratory volumes tend to stabilize intraoral pressure when vocal tract resistance is experimentally reduced.<\/jats:p>","DOI":"10.1121\/1.398726","type":"journal-article","created":{"date-parts":[[2005,10,13]],"date-time":"2005-10-13T19:20:49Z","timestamp":1129231249000},"page":"917-924","update-policy":"http:\/\/dx.doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":13,"title":["Respiratory response to a decrease in velopharyngeal resistance"],"prefix":"10.1121","volume":"86","author":[{"given":"Donald W.","family":"Warren","sequence":"first","affiliation":[{"name":"Oral-Facial and Communicative Disorders Program, Dental Research Center and the Department of Dental Ecology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kathleen E.","family":"Morr","sequence":"additional","affiliation":[{"name":"Department of Dental Ecology and the Dental Research Center, UNC School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anne","family":"Putnam Rochet","sequence":"additional","affiliation":[{"name":"Department of Speech Pathology and Audiology, University of Alberta, Edmonton T6G 0T2, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rodger M.","family":"Dalston","sequence":"additional","affiliation":[{"name":"Department of Surgery, UNC School of Medicine, Department of Dental Ecology and the Dental Research Center, UNC School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"231","container-title":["The Journal of the Acoustical Society of America"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/pubs.aip.org\/asa\/jasa\/article-pdf\/86\/3\/917\/11521848\/917_1_online.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/pubs.aip.org\/asa\/jasa\/article-pdf\/86\/3\/917\/11521848\/917_1_online.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,7,26]],"date-time":"2023-07-26T05:09:26Z","timestamp":1690348166000},"score":1,"resource":{"primary":{"URL":"https:\/\/pubs.aip.org\/jasa\/article\/86\/3\/917\/784780\/Respiratory-response-to-a-decrease-in"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1989,9,1]]},"references-count":0,"journal-issue":{"issue":"3","published-print":{"date-parts":[[1989,9,1]]}},"URL":"https:\/\/doi.org\/10.1121\/1.398726","relation":{},"ISSN":["0001-4966","1520-8524"],"issn-type":[{"value":"0001-4966","type":"print"},{"value":"1520-8524","type":"electronic"}],"subject":[],"published-other":{"date-parts":[[1989,9]]},"published":{"date-parts":[[1989,9,1]]}}}