Integral equation method for synthesis of russian vowels
This paper presents an integral equation method for solving interior Helmholtz problem with impedance boundary conditions. The solution of this problem is used to infer acoustic wave propagation phenomena inside human vocal tract when vowel sound is pronounced. The source-filter model is applied further to resynthesize time-domain audio signal. The excitation source is derived by Liljencrants-Fant model of vocal folds motion. The integral equation solution is then produces the spectral transfer function in order to filter excitation signal. The informal listening assessments demonstrate superior intelligibility of some synthesized russian vowels ([a], [u], [i]) comparing with other acoustic model-based speech synthesizers.