Analysis of vowel and speaker dependencies of source harmonic magnitudes in consonant‐vowel utterances

It is assumed that voice quality characteristics are mainly manifested in the glottal excitation signal. As [Holmberg et al., J. Speech Hear. Res. 38, 1212–1223 (1995)] showed, there is a correlation between low‐frequency harmonic magnitudes of the glottal source spectrum and voice quality parameters. In this study, we assess the influence of vowel and speaker differences on the difference between the first and the second harmonic magnitudes, H1−H2. The improved harmonics correction formula introduced in [Iseli et al., Proceedings of ICASSP, Vol. 1 (2004), pp. 669–672] is used to estimate source harmonic magnitudes. H1−H2 is estimated for consonant‐vowel utterances where the vowel is one of the three vowels /a,i,u/ and the consonant is one of the six plosives in American English /b,p,d,t,g,k/. Several repetitions of each of the utterances, spoken by two male and two female talkers, are analyzed. Other measurements, such as fundamental frequency, F0, and energy are estimated pitch synchronously. Results ar...