Abstract: ［Abstract］ Objective〖HTSS〗〓To study acoustic parameters of children′s vocal nodules, to analyze the acoustic characteristics and differences of children′s vocal nodules before and after treatment and to provide theoretical basis for the quantitative evaluation of voice improvement in children with vocal nodules after treatment by using voice parameters.
〖HTH〗〖WTHZ〗Methods〖HTSS〗〓Fortyfive cases of vocal nodules diagnosed by stroboscopic laryngoscope were selected as the treatment group, and 45 normal children as control group. Multidimensional speech analysis was carried out by computer speech station 4150B type speech analysis system.
〖HTH〗〖WTHZ〗Results〖HTSS〗〓Among children with vocal nodules after 2 weeks′ nonsurgical treatment,26 cases were cured, 11 cases got better, 8 patients were improved. In treatment group before and after treatment, fundamental frequency（Fo）, highest fundamental frequency（Fhi）, Jita, Jitter, Shimmer, amplitude perturbation quotient（APQ）, noise to harmonic ratio（NHR） were higher than that in the control group. In treatment group after treatment, Jita, Jitter, Shimmer, APQ, NHR were lower than the group before treatment, the difference was statistically significant(P＜005).
〖HTH〗〖WTHZ〗Conclusion〖HTSS〗〓The acoustic parameters of vocal nodules in children can be evaluated objectively by computer voice acoustic testing, which can be used to evaluate the therapeutic effect of vocal nodules in children. The voice acoustic parameters of children with vocal nodules are significantly different from those of normal children. Children with vocal nodules of vocal training and voice rehabilitation is of great significance to improve children's voice quality, training and drug treatment combined with voice can improve the patient′s pronunciation function, which is worthy of promotion.

Key words: vocal nodules； , laryngoscopy； treatment outcome