Abstract: “The aim of this paper is to study the efeect of the open quotient in the classification of pathological voices. The Open quotient is a glottal voicing parameter representing the ratio of the open phase by the pitch period. This parameter is computed knowing the GCI and the GOI detected by the MPM. The classification is operated on MEII pathological database using SVM classifiers multi-class one-against-all. We consider a binary classification into normal and pathological voices for female speakers and for all speakers of the database, and a threeclass classification into edema, nodule and normal voices for the female speakers”

Keywords: Pathological Voices, SVM, Open Quotient