Abstract
Pirith is believed as a protective doctrine preached by the Load Buddha in Pali language. The aim of this study is to analyze acoustic properties of Pirith using computer-aided methods and identify special characteristics and patterns. In this study, two methods were used to identify special characteristics of Angulimala Sutta. First method calculates voiced to unvoiced ratio using zero crossing rate and energy content associated with the acoustic signal while second method recognizes vowel distribution using first and second formant frequencies. Results of the first method indicates approximately 96% of frames are voiced while the second method suggests approximately 72% of vowels concentrate in the square region of F1,0~1500 Hz and demonstrating when chanting the Angulimala sutta most of the time the tongue height is low positioned in back levels while lips shaped unrounded. KEYWORDS: Formant frequencies, Voiced to unvoiced ratio, Zero-Crossing rate, Vowel distribution
Highlights
Samples of Angulimala Sutta recited by male monk chanters were recorded under high precision conditions and 15 samples were subjected to analysis
Frame-by-frame analysis was used with hamming windows and liner predictive coding (LPC) and auto correlation to extract the formant values
The Angulimala sutta is rich with vowels as it shows approximately voiced to unvoiced ratio
Summary
The aim of this study is to analyze acoustic properties of Pirith using computer-aided methods and identify special characteristics and patterns
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