Phonological differences among Slavic languages can be best interpreted in terms of the differences in the degree to which the sonority scale is applied in syllables. In those Slavic languages in which the sonority scale is used more consistently, only “one-peak” syllables occur. This is the prevailing syllable structure in the languages of the world. Some Slavic languages, however, admit two-peak syllables.

Sonority is a poorly defined (Ohala 1992) and complex feature. It should be understood as the audibilit…