The article is devoted to the problem of improving Russian pronunciation by law enforcement officers of foreign states. In this work, based on research in linguistics, scientific articles on Russian phonetics, textbooks on the methodology of teaching Russian as a foreign language, materials for the development of phonetic skills by foreign speakers, an articulation characteristic, a set of techniques for staging and differentiating sounds [c], [z], [ts] from foreign students in the classroom on Russian as a foreign language. The concepts of «phonological competence», «hearing and pronunciation skill» are being clarified. There are training exercises and tasks, texts of poems, tongue twisters, proverbs, sayings, idiomatic expressions, the sound form of which is a particular difficulty for foreign students, and work on which contributes to the correction and consolidation of the pronunciation of the whistling sounds of the Russian language.