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J Korean Soc Laryngol Phoniatr Logop > Volume 18(1); 2007 > Article
Journal of The Korean Society of Laryngology, Phoniatrics and Logopedics 2007;18(1): 33-38.
편도적출술이 구강 및 비강 음향스팩트럼에 미치는 영향
최동일, 공일승, 이은정, 소상수, 양윤수, 홍기환
전북대학교 의과대학 이비인후과학교실
Effects of Tonsillectomy on Oral and Nasal Spectral Outputs for Sustained Vowel
Dong-Il Choi, Il-Seung Kong, Eun-Jung Lee, Sang-Soo So, Yoon-Soo Yang, Ki-Hwan Hong
Department of Otolaryngology-HNS, Medical School, Chonbuk National University
ABSTRACT
Background and Objectives:
It has been suggested that tonsillectomy possibly causes changes of voice because the morphology of the vocal tract is altered. This may cause serious problems for professional voice users.
Materials and Method:
Subjects were 26 patients. The oral and nasal sound spectrum of oral vowel /a/, /e/ and /i/ were measured before and after tonsillectomy. The formant frequencies and intensities for oral and nasal spectra were compared. The nasality and fundamental frequencies for oral vowel were measured.
Results:
The first formant frequencies for oral spectra of all vowels were not changed after surgery, but the second formant frequencies were increased significantly after surgery in the vowel /e/ and /i/. The first and second formant intensities for oral spectra were increased significantly after surgery in the all vowels. The first and second formant frequencies for nasal spectra of all vowels were not changed after surgery, but their intensities for nasal spectra were increased after surgery. The nasalities for oral vowel were not changed after surgery.
Conclusion
: Tonsillectomy appeared to change the spectral features of oral and nasal components of oral vowel, especially spectral intensities.
KEY WORDS: Tonsillectomy;Spectral analysis;
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