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Relevance. Since phonological changes at the junction of morphemes, in particular in the consonantism system, have not been sufficiently studied. The formation of an idea of synharmonic processes is relevant in modern linguistic science. Purpose. The research purpose was to study the sound parameters, phonological features and synharmonism on the example of the Kazakh, Turkish and English languages. Methodology. The following methods were used to achieve the research purpose: comparative, structural, phonetic, analytical and synthetic. Results. This article presents definitions, patterns and four stages in the history of the study of vowel harmony in the Kazakh language. To determine the level of labial harmony of Kazakh vowels, a table of comparison with other Turkic languages was presented. In this paper, the main phonological changes at the junction of the root and affixal morphemes and their expression in the sound plane were noted, the influence of phonetics on other language levels was assessed. The idea of four main timbres in the Kazakh language has been formed: soft, hard, rounded and unrounded, the features of vocal and consonant synharmonism. Methods for improving the identification of sound parameters and the formation of phonetic speech patterns using machine technologies are considered. Conclusions. The study concludes that while Kazakh and Turkish share similarities in vowel harmony patterns, they differ in application, and English exhibits a largely disharmonious sound structure with some exceptions in borrowed words. Keywords: vowels and consonants; phoneme; sound system; affix; morphemic junction
Көпбосынов et al. (Mon,) studied this question.