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Acoustic and perceptual aspects of vocal function in children with adenotonsillar hypertrophy: effects of surgery
Division of Speech and Language Pathology, Department of Clinical and Experimental Medicine, Linköping University, Linköping.
Division of Oto-Rhino-Laryngology, Department of Clinical and Experimental Medicine, Linköping University, Linköping.
Division of Oto-Rhino-Laryngology, Department of Clinical and Experimental Medicine, Linköping University, Linköping; Department of Nursing Science, School of Health Sciences, Jönköping University, Jönköping.ORCID iD: 0000-0001-8549-9039
Division of Speech and Language Pathology, Department of Clinical and Experimental Medicine, Linköping University, Linköping.
2012 (English)In: Journal of Voice, ISSN 0892-1997, E-ISSN 1873-4588, Vol. 26, no 4, p. 480-487Article in journal (Refereed) Published
Abstract [en]

Objective: To evaluate outcome of two types of tonsil surgery (tonsillectomy [TE] + adenoidectomy or tonsillotomy [TT] + adenoidectomy) on vocal function perceptually and acoustically.

Study Design: Sixty-seven children, aged 50–65 months, on waiting list for tonsil surgery were randomized to TE (n = 33) or TT (n = 34). Fifty-seven age- and gender-matched healthy preschool children were controls. Twenty-eight of them, aged 48–59 months, served as control group before surgery, and 29, aged 60–71 months, served as control group after surgery.

Methods:  Before surgery and 6 months postoperatively, the children were recorded producing three sustained vowels (/ɑ/, /u/, and /i/) and 14 words. The control groups were recorded only once. Three trained speech and language pathologists performed the perceptual analysis using visual analog scale for eight voice quality parameters. Acoustic analysis from sustained vowels included average fundamental frequency, jitter percent, shimmer percent, noise-to-harmonic ratio, and the center frequencies of formants 1–3.

Results: Before surgery, the children were rated to have more hyponasality and compressed/throaty voice (P < 0.05) and lower mean pitch (P < 0.01) in comparison to the control group. They also had higher perturbation measures and lower frequencies of the second and third formants. After surgery, there were no differences perceptually. Perturbation measures decreased but were still higher compared with those of control group (P < 0.05). Differences in formant frequencies for /i/ and /u/ remained. No differences were found between the two surgical methods.

Conclusion: Voice quality is affected perceptually and acoustically by adenotonsillar hypertrophy. After surgery, the voice is perceptually normalized but acoustic differences remain. Outcome was equal for both surgical methods.

Place, publisher, year, edition, pages
New York, USA: Mosby-Elsevier , 2012. Vol. 26, no 4, p. 480-487
Keywords [en]
Voice quality, Children, Perceptual and acoustic analyses, Tonsil surgery
National Category
Medical and Health Sciences Otorhinolaryngology
Identifiers
URN: urn:nbn:se:oru:diva-40774DOI: 10.1016/j.jvoice.2010.11.003ISI: 000305961500018Scopus ID: 2-s2.0-84863202388OAI: oai:DiVA.org:oru-40774DiVA, id: diva2:778657
Available from: 2010-08-27 Created: 2015-01-11 Last updated: 2017-12-05Bibliographically approved

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