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Acoustic and perceptual aspects of vocal function in children with adenotonsillar hypertrophy-effects of surgery
Avdelningen för Logopedi, Inst för Kliniks och Expermentell Medicin, Hälsouniversitetet, Linköping .
Avdelningen för Otorhinolaryngologi, Inst för Kliniks och Expermentell Medicin, Hälsouniversitetet, Linköping.
Jönköping University, School of Health Science, HHJ. CHILD.
Avdelningen för Logopedi, Inst för Kliniks och Expermentell Medicin, Hälsouniversitetet, 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
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
Identifiers
URN: urn:nbn:se:hj:diva-12975DOI: 10.1016/j.jvoice.2010.11.003OAI: oai:DiVA.org:hj-12975DiVA, id: diva2:345915
Available from: 2010-08-27 Created: 2010-08-27 Last updated: 2017-12-12Bibliographically approved

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Ericsson, Elisabeth

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