title: [A preliminary study of the influence of different consonants on the vowel in normal people].
abstract: OBJECTIVE
  To study the influence of different consonants on the vowel in normal people for guiding research and treatment of cleft palate misarticulations.
  
  
  METHODS
  35 normal students including 15 males and 20 females were selected for this study. The average age was 20.43 year. The six test syllables were divided into three groups: /si/-/ji/, /bo/-/po/ and /jü/-/qü/. The measured indexes of vowel, which were input into CSL4400, were duration (Dur), pitch, the first three formants (F1, F2, F3) and energy (E). The acoustic features of the vowel of each group were compared by SPSS software with Paired t test.
  
  
  RESULTS
  Dur of the vowel was 0.39+/-0.08 in /si/ and 0.31+/-0.07 in /ji/, F2 of the vowel was 2093.55+/-350.62 in /si/ and 2454.33+/-422.00 in /ji/, there was significant difference in Dur and F2 between the vowels of /si/-/ji/ (P<0.01); Dur of the vowel was 0.35+/-0.09 in /bo/ and 0.53+/-0.07 in /po/, E of the vowel was 64.11+/-4.58 in /bo/ and 69.94+/-3.59 in /po/, there was significant difference in Dur and E between the vowels of /bo/-/po/ (P<0.01); Dur of the vowel was 0.29+/-0.07 in /jü/ and 0.35+/-0.09 in /qü/, F3 of the vowel was 3180.30+/-301.72 in /jü/ and 2901.06+/-259.75 in /qü/, E of the vowel was 68.99+/-4.59 in /jü/ and 71.70+/-5.21 in /qü/, there was significant difference in Dur, E and F3 between the vowels of /jü/-/qü/ (P<0.05).
  
  
  CONCLUSIONS
  It is suggested that the aspiration of the consonant, the part and the extent of the block of the consonant could affect the next vowel, but couldn't change its quality.
authors.affiliation: Craniofacial Center, Ninth People's Hospital, School of Stomatology, Shanghai Second Medical University, Shanghai Research institute of Stomatology, Shanghai 200011, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Chen
authors.forename: Yu-sheng
authors.initials: YS
authors.lastname: Yang
authors.forename: Yi-lai
authors.initials: YL
authors.lastname: Wu
authors.forename: Guo-min
authors.initials: GM
authors.lastname: Wang
mesh_terms: D001184:Articulation Disorders; D005260:Female; D006801:Humans; D008297:Male; D010700:Phonetics; D013061:Speech Acoustics; D055815:Young Adult