The article deals with specific character of vowels in the Ukrainian language on their spectrum. First four formants for each sonant are located, features of their placing in a spectrum are analysed and experimental data with the same existing in the literature are compared.

The dissertation project deals with the researching of vowel system in spoken Ukrainian standard language. The physical properties of vocalic sounds are investigated. This study characterizes the vowels of separate pronunciation as well as vowels of speech flow. Sounds are analyzed in various word positions and depending on speaking rate. The problem of speaking rate is solved: its nature, place and role in phonetic system is determined. The rate of Ukrainian speech is scaled experimentally on the slow, moderate and fast.

The phonetic word implementation in spoken Ukrainian language was studied relative to its acoustic intensity. The experimental results showed a character of vowels energy organization in а word. An attempt to model the energy running of phonetic word was made in Ukrainian.

the Ukrainian vowels classification as one of the most fundamental issue in Ukrainian Phonetics is proposed in the study. Vowels are classified according spectrum analysis detected differential characteristics of sounds.