Abstract:

Objective To study the acoustic parameters of normal adults in 4 phonation modes. Methods Acoustic parameters of 60 normal adults (20～50 years old, 30 males and 30 females) were measured with computer voice evaluation system. Results The highest true voice was most precedent and the others one by one were comfortable voice, the highest falsetto voice and the lowest true voice. Jitter of comfortable voice and the lowest true voice between male and female showed statistically significant difference. Conclusion The voice of adult had distinctive characteristics with laryngeal muscle function.

Key words: voice, sonagraphy, acoustic parameter