ABSTRACT
Objective To explore the effect of FESS on nasal resonance characteristics in patient with chronic sinusitis .Methods Detected 50 cases of adult patients with type Ⅱ chronic sinusitis ,and collected the date about the application of multi-channel voice analysis system that tested the pronunciation /i/before and three months af-ter FESS spectrum - energy distribution while compared with 50 normal subjects .Results Patients with type Ⅱchronic sinusitis before surgery compared with normal subjects ,the head of the low -frequency energy was higher , high-frequency was lower ,the difference was statistically significant (P0 .05) .Conclusion For patients with chronic sinusitis ,low -frequency of the voice of nasal resonance de-creased ,and high-frequency increased after FESS .