A TECHNIQUE FOR MODELING VOCAL-TRACT ACOUSTIC PROPERTIES

摘要

In the paper a theory is presented on lossless pole-zero modeling of speech signals for the description of nasal and affricate sounds. The theory is based on a generalized vocal tract tube model which consists of the main vocal tract, the oral tract and the nasal tract. The combination of two lattice structures representing the oral and the nasal tracts form one larger lattice structure when viewed at their joint point called the branch boundary. The oral and the nasal tract respectively render discrete-time reactances, whose convex combination generates the discrete-time reactance at the branch boundary.