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Medialization thyroplasty and endoscopic intracordal infusion of fat or heterologous materials are the treatments of choice for glottic incompetence, of both neurological and cicatricial origin. Functional evaluation after thyroplastic medialisation often based on several approaches, in order to assess effectiveness of the adopted technique. The most common analysis methods are: videolaryngostroboscopy (VLS), morphological aspects evaluation, GRBAS scale and (Voice Handicap Index), relative to perceptive and subjective voice analysis, and MDVP(R), that provides objective acoustic parameters. First results are presented here, obtained both with approaches and a new voice analysis tool, based on robust estimators for tracking fundamental frequency F0, noise formants. New indexes are also proposed, to easily quantify voice quality recovering. The proposed approach successfully applied to patients that underwent thyroplastic medialisation, and is suited for integrating the MDVP features.