Abstract

Voice signal processing requires real-time processing. For this reason, a new method which updates the spectrum by using input data is proposed. In this method, analysis in the time-frequency domain is executed as well as wavelet transform. Vowels /i/ and /e/ consist of fundamental, harmonic, and high frequency waves. These high frequency waves determine the sounds of /i/ and /e/. These high frequency waves may also exist in /a/ and /o/. In this article, we analyze these high frequency waves by using a new analyzing method, and we show the constitution of high frequency waves. Since the waveform of a consonant does not repeat, the analysis cannot be performed like the analysis of the high frequency wave of a vowel. In a consonant, we show the fluctuation of the spectrum with time.

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