Comparative Study of Several Perturbation Parameters in Terms of Their Relationship with Perceptual Judgments

Abstract

We compared perturbation parameters which have been frequently used to quantify variations in the fundamental period (frequency) and amplitude sequences of the pathological voice. The parameters included jitter/shimmer factor, perturbation quotient and jitter/shimmer parameter. The comparison was made in terms of the relationship of these parameters with perceptual judgments made on the GRBAS scale by a well-trained otolaryngologist. Experiments with 52 test vowels sustained by patients with laryngeal cancer, vocal fold polyp and recurrent nerve paralysis have shown that the jitter/shimmer parameter has the closest relationship with the perceptual impression of the pathological voice. © 1993, The Japan Society of Logopedics and Phoniatrics. All rights reserved.