Abstract
Languages differ in how vowel length is applied, which can affect the acquisition of a second language. In Czech, the length is phonological.
There are practically no restrictions on its occurrence. It is also completely independent of word stress.
In Russian, the length of vocals does not have a phonological status but can be an accompanying characteristic in the implementation of a word stress. The subject of the experiment is the perceptual analysis of vocal quantity in Czech as L2 in Russian speakers (8 subjects).
The material consists of recordings of a set of trisyllabic words (48 lexemes, 256 items), in which the structure of quantity (8 different patterns) is checked.