Periodic Component Replacing Method with Recognition Rate Test on Vowel Voices

Vowel and consonant are the two basic phonemes in speech sound, which then would be used to define syllable. However, it appears that in most studies the focus seems to be set on words, or at least in syllables, but not on phonemes, despite vowel and consonant are the fundamental phonemes in phonetic. In this research, study focused on vowel in speech sound is conducted in hope to further understand the construct and characteristics of vowels, with help of technology that was not available in earlier time. A robust method is introduced for the detection and extraction of each cycle of waveform, periodic component, found in vowels and, sometimes, semivowels. Cross-correlation coefficient of continuous components is calculated to verify the similarities of continuous components, while a recognition test is conducted to verify the insignificant of difference in continuous components. Result of the tests both supports the statement of vowel having structure of repetitive waveform.