목적: The aim of present study was to investigate the effects of age on nasalance scores in normal Korean-speaking population. The nasal cavity volumes and nasal resistance were measured additionally, as well as to evaluate the relationship between these measures, in order to determine the mechanism for changes in nasality. 방법:207 healthy Korean-speaking adults volunteers (101 males and 106 females, mean age 45.01 years, age range 21-70 years) who had no nasal or voice-related complaints were enrolled in the study. Acoustic rhinometry, rhinomanometry and nasometry were performed in the subjects. The relationship among different age groups, changes in nasalance scores, acoustic rhinometric and rhinomanometric parameters was investigated statistically. The Pearson test was used to determine correlation and covariance analysis were used for among different age group comparison. 결과:The parameters of nasal cavity volumes, nasal resistance and nasality showed no significant differences in gender. The nasal cavity volumes were positively associated with ages. Interestingly, there were negative correlations between the nasal or oral-nasal nasalance scores and ages, while the nasal resistance were decreased by increasing of ages. 결론:The nasal cavity volume and nasal resistance may not be the dominant factors that affect the nasalance scores. It was speculated that the involuntary velopharyngeal closure may play an important role in the mechanism of nasalance changes.