Second International Workshop on Models and Analysis of Vocal Emissions for Biomedical Applications (MAVEBA 2001)

Florence, Italy
September 13-15, 2001

Acoustic Features of Voice of Children with Motoric Disorders

Natalija Bolfan-Stošiċ, Emica Farago

Faculty of Education and Rehabilitation Sciences, Dept. of Logopedics, University of Zagreb, Croatia

The sample of this research were seven children with neuro-motoric disorders (of both sexes- 3 girls and 4 boys). Acoustic analysis of voice parameters, representing variables in this research (fundamental frequency, jitter, shimmer, harmonic to noise ratio as well as maximum duration of the vowel /a/) has been made by using EZ Voice Plus program for voice analysis. The results of correlation matrix obtained by Statistica for Windows Ver.4.0 show significant negative correlation between frequency of laryngeal tone and jitter, and HNR and jitter. Acoustic analysis of the phonation of the vowel /a/ of this group shows great deviation of the voice from the normal, which points to the problem of non-development of voice quality in motoric disorders group mainly resulting from neglected therapy of speech and voice.

Index Terms. jitter, shimmer, fundamental frequency, harmonic to noise ratio, voice quality, cerebral palsy, acoustical analyses

Full Paper

Bibliographic reference.  Bolfan-Stošiċ, Natalija / Farago, Emica (2001): "Acoustic features of voice of children with motoric disorders", In MAVEBA-2001, 79-83.