A comparison of CPP analysis among breathiness ranks

Abstract

The aim of this study is to synthesize pathological breathy voice and to make a cepstral peak prominence (CPP) table following breathiness ranks by cepstral analysis to supplement reliability of the perceptual auditory judgment task. KlattGrid synthesizer included in Praat was used. Synthesis parameters consist of two groups, i.e., constants and variables. Constant parameters are pitch, amplitude, flutter, open phase, oral formant and bandwidth. Variable parameters are breathiness (BR), aspiration amplitude (AH), and spectral tilt (TL). Five hundred sixty samples of synthetic breathy vowel /a/ for male were created. Three raters participated in ranking of the breathiness. 217 were proved to be inadequate samples from perceptual judgment and cepstral analysis. Finally, 343 samples were selected. These CPP values and other related parameters from cepstral analysis are classified under four breathiness ranks (B0~B3). The mean and standard deviation of CPP is 16.10±1.15 dB(B0), 13.68±1.34 dB(B1), 10.97±1.41 dB(B2), and 3.03±4.07 dB(B3). The value of CPP decreases toward the severe group of breathiness because there is a lot of noise and a small quantity of harmonics.

A Comparison of Cepstral and Spectral Measures according to Measurement Position in a Reading Passage

“…에, 국내 선행연구에서는 연구마다 말 자료 없이 모음 샘플만을 분 석하거나 (Choi & Choi, 2014;Kang, Koo, & Jo, 2015;Kang & Seong, 2012;Shim et al, 2015;Shin & Hong, 2016), 짧은 자발화 문장을 사용하거나 (Yu, Choi, Choi, & Lee, 2017), 특 정 표준문단(예: '가을', '산책' 문단 등)의 각기 다른 일부 문장 부분 을 분석의 대상으로 삼아왔다 Kim, Choi, Lee, & Jin, 2015;Lee, Lim, & Choi, 2017;Park, Mun, Lee, & Jin, 2013;Shim et al, 2016).…”