Abstract
The aim of this study was to evaluate changes in acoustic features of speech and voice after uvulopalatopharyngoplasty (UPPP) with the Harmonic Scalpel (HS), using the multidimensional voice program (MDVP) in conjunction with other tests. Before and 6 months after surgery, phonetically balanced sentences and sustained vowels a, e, i were carried out and digitalized with MDVP in all the patients, as an evaluation of nasal resonance (trough the Glatzel and the Gutzmann tests), speech articulation and voice handicap index (VHI). These parameters were estimated: average of fundamental frequency, Jitter, Shimmer, noise-to-harmonics ratio, voice turbulence index, soft phonation index, degree of voiceless, degree of voice breaks and peak amplitude variation. Six months after surgery, improvements in all the acoustic parameters, in nasalance and VHI were achieved. In our experiences UPPP, with the HS, improves speech and voice in patients affected by snoring and/or obstructive sleep apnea syndrome.
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