5th International Conference on Spoken Language Processing

Sydney, Australia
November 30 - December 4, 1998

Jitter And Shimmer Differences Between Pathological Voices Of School Children

Natalija Bolfan-Stosic, Tatjana Prizl

Acoustic Laboratory for Speech and Hearing,University of Zagreb, Croatia

A study was undertaken to determine differences between jitter and shimmer in voices of children with different syndromes. Voices of 60 children, both sexes, aged 7-12 years were analysed by EZ Voice Analysis Software (program for jitter and shimmer measuring). The main purpose of this paper has diagnostic background. Obtained results show, which acoustical indicators of pathological voice are in certain group of children, and in which shapes they appear. In that way, we try to find easiest way to explain acoustical characteristics of different voice pathologies as help in diagnostics. The results indicate that the children with stuttering and disartric symptoms have higher values almost in all applied variables than the average values of children from other groups. Children with Down syndrome and hearing losses exhibited the most disordered voice quality. Finally, the mixed group (stuttering with dysphonia) and group of children with dysphonia exhibited the least pathological characteristics of voice. Obtained results of Analysis of Variance have shown significant statistical differences in all applied variables among the groups.

Full Paper

Bibliographic reference.  Bolfan-Stosic, Natalija / Prizl, Tatjana (1998): "Jitter and shimmer differences between pathological voices of school children", In ICSLP-1998, paper 0103.