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The acoustic characteristics of Russian vowels in children of 6 and 7 years of age

The purpose of this investigation is to examine the process of first and second formants of the vowels from child speech approaching corresponding values in normal Russian adult speech. The vowels in the words of 5 Russian children of 4 and 5 years of age were analyzed. The vowel formant structure was examined. Word stress and palatal context influence on the formant structure of the vowels were taken into account. It was shown that word stress is formed by 4 years of age. The formant characteristics do not correspond to those in adult speech yet, but may be used to distinguish between the vowels.