Effects of adenotonsillectomy on speech spectrum in children.

摘要: Summary Objective The vocal tract, which starts from the glottis and extends to lips is considered be a resonator for speech production. Enlarged palatine tonsils may cause hypernasal speech, oral breathing or muffled voice. Changes in structure of this are assumed modify characteristics. aim study was evaluate changes acoustic feature after adenotonsillectomy children establish concepts management rational therapeutic approach. Methods Before surgery, an analysis made 40 children, aged between 5 14 years old, with enlarged hypetrophic adenoids. Phonetically balanced sentences were carried out digitalized Multi Dimensional Voice Program (MDVP, Kay Elemetrics). As control group, healthy identified. These parameters estimated: average fundamental frequency (Fo), Jitt, Shim, noise harmonics ratio (NHR), voice turbulence index (VTI), soft phonation (SPI), degree voiceless (DUV) breaks (DVB). Results After adenotonsillectomy, our data showed improvement all parameters: Fo, NHR, VTI, SPI, DUV DVB postoperative decrease; comparison highlighted normalization VTI DVB. Conclusions suggests reduction nasal resonance quality. MDVP method useful analyzing characteristics, evaluating effects surgical excision approach: selected cases patients tonsils, decision perform tonsillectomy depends on its potential positive effect too.