At the beginning of this century, which is known as the century of globalization, learning a foreign language is inevitable. Therefore, almost a large part of society partly have to deal with foreign languages. Learning a foreign language is associated with many problems. Not only grammatical and lexical problem in both languages, but also the phonetic system in all their aspects such as acoustic and articulation characteristics, accent, intonation and stress. Such problems should be solved in order to realize the main purpose of the education, which means communicativeness with maximum approximation to the original language. The experiment was aimed at improving the acoustic and pronunciation skills of Persian-speaking students. The purpose of the analysis is to eliminate the interfering influence of phonetic phenomena of the native language on the target language as well as to correct and improve students’ pronunciation and using special instrumentation techniques bring it closer to the normative pronunciation of modern Russian literary language. The results of this study show that mistakes in pronouncing consonants depend directly on the characteristics of the consonant systems of the Russian and Persian languages. A comparison of articulatory movements of speech organs involved in the production of speech (both active and passive) of Persian and Russian fricative consonants revealed the fact that there is no similarity between them.