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J Korean Soc Laryngol Phoniatr Logop > Volume 20(1); 2009 > Article
Journal of The Korean Society of Laryngology, Phoniatrics and Logopedics 2009;20(1): 57-62.
언어습득기 이전 청각장애인의 후두소견 및 음성학적 특성
김성태, 윤태현, 김상윤, 최승호, 남순열
울산대학교 의과대학 서울아산병원 이비인후과학교실
Laryngeal Findings and Phonetic Characteristics in Prelingually Deaf Patients
Seong-Tae Kim, Tae-Hyun Yoon, Sang-Yoon Kim, Seung-Ho Choi, Soon-Yuhl Nam
Department of Otolaryngology, Asan Medical Center, University of Ulsan College of Medicine
Background and Objectives : There are few studies reported that specifically examine the laryngeal function in patients with profound hearing loss or deafness, This study was designed to examine videostroboscopic findings and phonetic characteristics in adult patients with prelingually deaf.
Materials and Method:
Sixteen patients (seven males, nine females) diagnosed as prelingually deaf aged from 19 to 54 years, and were compared with a 20 normal control group with no laryngeal pathology and normal hearing group, Videostroboscopic evaluations were rated by experienced judges on various parameters describing the structure and function of the laryngeal mechanism during comfortable pitch and loudness phonations. Acoustic analysis test were done, and a nasalance test performed to measure rabbit, baby, and mother passage. CSL were measured to determine the first and two formant frequencies of vowels /a/, /i/, /u/, Statistical analysis was done using Mann-Whitney U or Wilcoxon signed ranks test.
Videostroboscopic findings showed phase symmetry but significantly more occurrences decrement in the amplitude of vibration, mucosal wave, irregularity of the vibration and increased glottal gap size during the closed phase of phonation, In addition, group of prelingually deaf patients were observed to have significantly more occurrences of abnormal supraglottic activities during phonation. The percentage of shimmer in the group of prelingually deaf patients were higher than in the control group. Characteristics of vowels were lower of the second formant of the vowel /i/. Nasalance in prelingually deaf patients showed normal nasality for all passages,
Prelingually deaf patients show stroboscopic abnormal findings without any mucosal lesion, suggesting that they have considerable functional voice disorder. We suggest that prelingually deaf adults should perform vocal training for normalized laryngeal function after cochlear implantation.
KEY WORDS: Videostroboscopic findings;Prelingually deaf;Functional voice disorder;
중심 단어: 화상회선경술;언어습득기 이전 청각장애;기능적 발성장애;
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