The article presents physical basics of human speech production. There are considered the most fundamental phonemes-vowels. Acoustic properties of vowels are extracted. It is observed that the most important are positions and shapes of first two formants. The rest of the spectral attributes of vowels, exception is voiced excitation, can be canelled. Vowels are still recognized by human. In the article acoustic model of vowels production is propsed and tested. Results are presented in graphic manner.
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