ABSTRACT
BACKGROUND: Perceptual evaluation is fundamental to assessment of vocal quality but is it one of the most cotroversial subjects in voice evaluation. The main reason of this problems is the versality of the subjective feeling of listner in the perception of abnormal voice quality. In contrast with perceptual evaluation, the laryngostroboscopical examination is objective method of vocal function analysis. OBJECTIVES: The aim of this study was to determine the most important vibratory pattern abnormalities that may lead to different grades in the perceptual evaluation of breathiness quality. MATERIALS AND METHOD: We analysed the perceived breathiness and laryngeal video-stroboscopic evaluation in 33 male and 49 female voice disordered subjects ranging in age from 25 to 69 years. RESULTS: A strong relationship between perceived breathiness grade and stroboscpic rating parameters was found in the asymmetry of phase, asymmetry of the arytenoid region, supraglottic compensation and glottic chink size. CONCLUSION: The result suggest that the static size and dynamic shape variation of incomplete glottal closure is the most important determining factors of perceptual evaluation of breathiness.