Pulse Source of Excitation in Speech Signal

The properties of speech bursts of closure are studied using the material of a database of 39 speakers containing single-digit and multi-digit numerals with parallel recording of signals on a telephone handset and a directional microphone. Speech burst detection is performed by a short-term and long-term detector of spectral-temporal inhomogeneities, as well as a detector of the similarity measure of the eigenfunctions of the consonant burst spectrum and the current spectrum of the speech burst. The probability of the presence of a voiced or voiceless closure is estimated in the spaces of the amplitude spectrum and the spectrum of the group delay by the ratio of energy in the high and low frequency ranges. The place of articulation of a back-lingual consonant affects the probability distributions of the duration of the interval between the onset of a speech burst and the onset of a vowel, the frequency of the peak with maximum amplitude in the high-frequency region, the ratio of the energy in the high- and low-frequency region of the speech burst spectrum, and the similarity measures of the eigenfunctions of the consonant burst spectrum and the current spectrum of the speech burst.