Combination of voiced and voiceless consonants in a word, at the joint of two content words, at the joint of a functional word and a content word (phonetic words). Articulation of soft and hard consonants in loan words, new phonological opposition opportunities. Norm dependence on the system. Combination of the /chn/ and /cht/ consonants articulated according to the Moscow and St.Petersburg norms. The emergence of a unified pronunciation norm.