Abstract
Now, almost all the voices of robots are made by speech synthesizer. They are sounds produced by electronic speakers. This is a study on the Singer Robot using artificial larynx. Now it can generate Japanese 5 vowels [a], [i], [u], [e], and [o]. But it is very difficult to generate clear vowels because the frequencies of formants are not easy to be controlled by changing the cross sectional area of the vocal tract. The Singer Robot is expected to produce vowels with correct formants in order to sing in distinct pronunciations. In this paper, a new optimum adjustment method of vowel formant is proposed. In this method, an optimum area distribution of vocal tract can be searched for the targeted vector of the first formant and the second formant of clear vowel. This optimum adjustment algorithm uses Taboo Search method to explore the optimum solution.
