{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,15]],"date-time":"2026-10-15T01:39:43Z","timestamp":1792028383481,"version":"4.4.0"},"reference-count":41,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2018,11,8]],"date-time":"2018-11-08T00:00:00Z","timestamp":1541635200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Intl J Lang &amp; Comm Disor"],"published-print":{"date-parts":[[2019,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>To date, the immediate effects of a semi\u2010occluded vocal tract (SOVT) configuration have been thoroughly demonstrated. However, it is not yet sufficiently confirmed whether a therapy programme (i.e. longer than one session) using SOVT exercises leads to an enhanced phonation and improved vocal quality.<\/jats:p><\/jats:sec><jats:sec><jats:title>Aims<\/jats:title><jats:p>The aim of this study was to investigate the effect of three SOVT therapy programmes: lip trill, water\u2010resistance therapy (WRT) and straw phonation, on the vocal quality, vocal capacities, psychosocial impact and vocal tract discomfort of patients with dysphonia.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods &amp; Procedures<\/jats:title><jats:p>A blocked\u2010randomized sham\u2010controlled trial was used. Thirty\u2010five patients with dysphonia (mean age = 21 years; 33 women, two men) were assigned to either a lip trill group, a WRT group, a straw phonation group or a control group using blocked randomization. The lip trill, WRT and straw phonation groups practised their respective SOVT exercise across 3 weeks, whereas the control group received a sham treatment across the same time span. A multidimensional voice assessment consisting of both objective (multiparametric indices: Dysphonia Severity Index (DSI), Acoustic Voice Quality Index (AVQI)) and subjective (subject's self\u2010report, auditory\u2013perceptual evaluation) vocal outcomes was performed by a blinded assessor pre\u2010 and post\u2010therapy.<\/jats:p><\/jats:sec><jats:sec><jats:title>Outcomes &amp; Results<\/jats:title><jats:p>Lip trill and straw phonation therapy led to a significant improvement in DSI. Auditory\u2013perceptual grade and roughness significantly decreased after straw phonation. Lip trill and WRT both led to a significant decrease in Voice Handicap Index. Subjects reported a better self\u2010perceived vocal quality and a more comfortable voice production after WRT. No changes were found after the sham treatment in the control group.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions &amp; Implications<\/jats:title><jats:p>Results suggest that SOVT therapy programmes including lip trill or straw phonation can improve the objective vocal quality in patients with dysphonia. Auditory\u2013perceptual improvements were found after straw phonation therapy, whereas psychosocial improvements were found after lip trill and WRT. Patients seem to experience more comfort and a better self\u2010perceived vocal quality after WRT. This study supports the use of the three SOVT therapy programmes in clinical practice. They all had a positive impact on one or more outcomes of the multidimensional voice assessment. Strikingly, vocal quality outcomes were not in line with the subject's opinion. Larger\u2010scale investigation is needed to support these preliminary findings.<\/jats:p><\/jats:sec>","DOI":"10.1111\/1460-6984.12431","type":"journal-article","created":{"date-parts":[[2018,11,8]],"date-time":"2018-11-08T18:33:27Z","timestamp":1541702007000},"page":"50-61","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":82,"title":["Effect of three semi\u2010occluded vocal tract therapy programmes on the phonation of patients with dysphonia: lip trill, water\u2010resistance therapy and straw phonation"],"prefix":"10.1111","volume":"54","author":[{"given":"Iris","family":"Meerschman","sequence":"first","affiliation":[{"name":"Ghent University, Department of Rehabilitation Sciences Research group: Speech, Language and Hearing Sciences  Ghent Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kristiane","family":"Van Lierde","sequence":"additional","affiliation":[{"name":"Ghent University, Department of Rehabilitation Sciences Research group: Speech, Language and Hearing Sciences  Ghent Belgium"},{"name":"University of Pretoria Department of Speech\u2010Language Pathology and Audiology  Pretoria South Africa"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Julie","family":"Ketels","sequence":"additional","affiliation":[{"name":"Ghent University, Department of Rehabilitation Sciences Research group: Speech, Language and Hearing Sciences  Ghent Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Charlotte","family":"Coppieters","sequence":"additional","affiliation":[{"name":"Ghent University, Department of Rehabilitation Sciences Research group: Speech, Language and Hearing Sciences  Ghent Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sofie","family":"Claeys","sequence":"additional","affiliation":[{"name":"Ghent University Department of Otorhinolaryngology  Ghent Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Evelien","family":"D'haeseleer","sequence":"additional","affiliation":[{"name":"Ghent University, Department of Rehabilitation Sciences Research group: Speech, Language and Hearing Sciences  Ghent Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2018,11,8]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jvoice.2015.02.004"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jvoice.2013.11.004"},{"key":"e_1_2_8_4_1","unstructured":"Boersma W.andWeenink D. 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