Evaluation of Pathologic Voices

A Review of Literature

Abstract

Evaluation of pathologic voices can monitor changes in the clinical course, and make early detection of laryngeal pathologies possible.
In this paper, the evaluation of pathologic voices was reviewed and discussed.
Initially, pathologic voices are analyzed using an oscillograph and sound spectrograph. With computer processing, acoustic characteristics can be measured and used to evaluate pathologic voices. Perturbation indices of fundamental frequency and peak amplitude are useful in evaluating pathologic voices. Spectrum ratios, and noise energies are also useful. Recently, as one of the latest techniques, cepstral analysis was applied for the same purposes.