15th International Congress of Phonetic Sciences (ICPhS-15)
Perceptual evaluation of normal and (functionally as well as organically) disordered voices according to the parameters hoarseness, breathiness, and roughness by two groups of (experienced and student) listeners showed that (a) voice quality ratings do not significantly differ in regard to the speech material (vowels vs. connected speech), (b) intrajudge agreement is above 80%, with expected higher interjudge agreement for experienced listeners (83%), and (c) average ratings of perceptual categories partially overlap between different types of voice qualities. Acoustic measurements of jitter-related values corroborate only a general distinction of normal and disordered voice, whereas differences between functional and organic dysphonia or various degrees within one type of voice disorder (as indicated by perceptual evaluation) are not consistently reflected.
Bibliographic reference. Grassegger, Hans (2003): "Perceptual evaluation and acoustic correlates of voice quality", In ICPhS-15, 2157-2160.