Dynamic spectral characteristics of defective sounds pronunciation in students with minimal dysarthric disorders

Ludmila Lopatina,Ludmila Baryaeva,Mariya Ivleva,D Rudoy,A Olshevskaya,N Ugrekhelidze

doi:10.1051/e3sconf/202127312088

Ludmila Lopatina, Ludmila Baryaeva + Show 4 more

Open Access

https://doi.org/10.1051/e3sconf/202127312088

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Abstract

The article is devoted to the analysis of the spectrographic characteristics of defective sounds pronunciation in children with minimal dysarthric disorders (mild dysarthria). These characteristics were obtained in the process of an experimental-phonetic study. It involved the study of the nature of changes that occur during the transition from one sound to another and also during the pronunciation of a single sound. The article presents the results of the experiment carried out on the basis of a qualitative analysis of dynamic spectrograms of syllables; describes the most permanent signs characterizing the defective sounds pronunciation in syllables of various structures (open, closed). The nature of the mutual influences of sounds in various structures of syllables is revealed. Comparative data were obtained for the acoustic (formant) proximity of various variants of defective pronunciation to the sound standard in children with minimal dysarthric disorders. The contextual phonetic influences at the level of syllables are determined, taking into account the acoustic characteristics of sounds and their defective variants.

Highlights

Pronunciation defects, which are associated with specific motor disorders in speech realization, are widely and variably presented in the structure of a speech defect in children with minimal dysarthric disorders
Disorders of motor regulation of articulatory organs lead to changes in the acoustic characteristics of speech [5,6,7]
The study of the spectral characteristics of sounds was carried out on the material of the phonetic group of hissing sounds, which are most often disturbed in pronunciation

Summary

Introduction

Pronunciation defects, which are associated with specific motor disorders in speech realization, are widely and variably presented in the structure of a speech defect in children with minimal dysarthric disorders (mild dysarthria). They arise as a result of damage to various brain structures involved in the control of the motor mechanism of speech [1,2,3,4]. The most essential feature of sound units is their inherent sound spectrum, characterized by the presence of a number of components (formants) in certain frequency fields. Formant trajectory on the transition areas correspond to those articulatory rearrangements that occur when articulation changes from consonant to vowel or from vowel to consonant [11, 12]

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