Objective      To study the recovery time and pattern of phonation function in the vocal polyps patients after surgery. Methods     The voice acoustic analysis was conducted on female patients with vocal cords polyps (patient group) treated by suspension laryngoscopy in our department from April 2014 to June 2015

and matched healthy people with normal cords (control group)

with 51 cases in each group. Parameters including fundamental frequency (F0)

jitter

shimmer

noise to harmonic ratio (NHR) and voice handicap index (VHI) were examined at weeks 1 and 2

months 1

3 and 6 after surgery. Data were comparatively analyzed between the 2 groups for observation of the vocal rehabilitation. Results       Compared to control group

the patient group had lower F0 and higher jitter

shimmer and NHR

and the differences were statistically significant (P0.05). F0 was gradually increased along with the recovery time

but higher jitter

shimmer and NHR were measurably decreased. At the 1st month the 4 parameters were closed to the levels of control group

and no significant difference was found at the 3rd and 6th months (P005). For VHI grades

they were approached to control group at the 3rd and 6th months without statistical difference (P0.05). Conclusion       The recovery of vocal function in patients with vocal cords polyps after microflap surgery is stepwise

and becomes normal after 1 month. Hence

we recommend the patients not to speak within the 1st week and rest their voice for 1 month after surgery.