AN ACOUSTIC ANALYSIS ON THE PRONUNCIATION OF KOREAN VOWELS IN PATIENT WITH CLASS III MALOCCLUSION

III급 부정교합 환자의 한국어 모음 발음에 관한 음향학적 분석

  • Kim, Young-Ho (Department of Orthodontics, The Institute of Oral Health Science, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Yoo, Hyun-Ji (Graduate Program in Speech and Language Pathology, Yonsei University) ;
  • Kim, Whi-Young (The Institute of Oral Health Science, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Hong, Jong-Rak (Department of Oral & Maxillofacial Surgery, The Institute of Oral Health Science, Samsung Medical Center, Sungkyunkwan University School of Medicine)
  • 김영호 (성균관의대 삼성서울병원 치과진료부 교정과) ;
  • 유현지 (연세대학교 대학원 언어병리학 협동과정) ;
  • 김휘영 (성균관의대 삼성서울병원 치과진료부) ;
  • 홍종락 (성균관의대 삼성서울병원 치과진료부 구강악안면외과)
  • Published : 2009.08.31

Abstract

The purpose of the study was to investigate the characteristics of the pronunciation of Korean vowels in patients with class III malocclusion. 11 adult male patients with class III malocclusion(mean ages 22.3 years) and four adult males with normal occlusion(mean ages 26.5 years) were selected for the analysis of eight Korean monophthongs /ㅣ, ㅔ, ㅐ, ㅏ, ㅓ, ㅗ, ㅡ, ㅜ/. The values and relationships of F1, F2 and F3 were derived from the stable section of target vowel in each sentence, and the analysis using formant plots and vowel triangles' distance and area was conducted to find the features of two groups' vowel distributions. Consequently, it was identified that the pronunciation of males patients with class III malocclusion showed high values of F1 in the low vowels, high values of F2 in the back vowels, and remarkably low position of /ㅏ/. The vowel triangle suggested that the triangle areas of male patients with class III malocclusion were shown wider vertically and narrower horizontally than those of males with normal occlusion. These characteristics could reflect the structural features of class III malocclusion such as the prognathic mandible, low tongue position, and advancement of back position of the tongue.

Keywords

References

  1. Koo HS: Characteristics of english vowels spoken by Koreans. Kor J Speech Sci 2000;7:107-16
  2. Koo HS: An acoustic study of the pronunciation of english vowels uttered by Korean regional dialect speakers. Kor J Speech Sci 2001;8:193-206
  3. Moon SJ: A fundamental phonetic investigation of Korean monophthongs. J Phonetic Society of Korea 2007;62:1-17
  4. Seong CJ: A formant analysis of the Korean monophthongs of the college students speaking chungnam dialect. J Linguistic Society of Korea 2005;43:189-213
  5. Yang B: A study on vowel formant variation by vocal tract modification. Kor J Speech Sci 1998;3:83-92
  6. Park YC: An acoustic analysis of pronunciation in children with Angle's class II div.1 malocclusaion. Graduate school of Seoul national university 1997
  7. Park JS: An acoustic analysis of abnormal pronunciation in children with anterior crossbite. Graduate school of Seoul national university 1996
  8. Jeong SY: An acoustic study of children who received anterior crossbite correction. Graduate school of Seoul national university 2002
  9. Choi JH: A study of acoustic phonetics of Korean vowel sounds in the primary dentition. Graduate school of Seoul national university 1994
  10. Lee SJ, Kim TW, Suhr CH: Study of recognition of malocclusion and orthodontic treatments. Korean J Orthod 1994;24:193-8
  11. Committee of white paper for malocclusaion. Report of measurement study for normal occlusion with stone model. Korean association of orthodontics 2000
  12. Vorperian HK, Kent RD: Vowel acoustic space development in children : a synthesis of acoustic and anatomic data. J Speech Lang Hear Res. 2007;50:1510-45 https://doi.org/10.1044/1092-4388(2007/104)
  13. Guay AH, Maxwell DL, Beecher R: A radiographic study of tongue postureat rest and during the phonation of /s/ in class III malocclusion. Angle Orthod 1978;48:10-22
  14. Subtelny JD, Mestre JC, Subtelny JD: Comparative study of normal defective articulation of /s/ as related to malocclusion and deglutition, J Speech Hear Disord. 1964;29:269-85 https://doi.org/10.1044/jshd.2903.269
  15. Bowers J, Tobey EA, Shaye R: An acoustic-speech study of patients who received orthognathic surgery. Am J Orthod 1985;88:373-9 https://doi.org/10.1016/0002-9416(85)90064-8
  16. Niemi M, Laaksonen JP, Peltomaki T, Kurimo J, Aaltonen O, Happonen RP: Acoustic comparison of vowel sounds produced before and after orthognathic surgery for mandibular advancement. J Oral Maxillofac Surg 2006;64:910-6 https://doi.org/10.1016/j.joms.2006.02.009
  17. Lee AS, Whitehill TL, Ciocca V, Samman N: Acoustic and perceptual analysis of the sibilant sound /s/ before and after orthognathic surgery. J Oral Maxillofac Surg. 2002;60:364-72 https://doi.org/10.1053/joms.2002.31221
  18. Yoo HJ, Kim YH: An acoustic analysis on the pronunciation of Korean vowels in normal occlusion. J Acoustical Society of Korea 2007;24:205-8