Synthesis of diplophonic and biphonic voices

The paper concerns the generation of speech sounds the timbre of which simulates the voice quality of dysphonic speakers. The present study will focus on the diplophonia and biphonation which are phonetic symptoms classified in pathologic voices. The proposed synthesizer includes the model of phase delayed overlapping sinusoid (PDOS) to simulate the area glottal waveforms. The glottal flow rate obtained by Rothenberg´s model and the vocal tract given by the concatenation of digital resonators (cascade formant synthesizer of Klatt). The preliminary tests show the capacity of our simulator to synthesize the diplophonic and biphonic voices.