Source Model Adequacy for Pathological Voice Synthesis

Pathological voices are particularly difficult to inverse filter and fit with source models, in part, because of source-tract interactions inherent in these voice types. In order to obtain good synthetic copies of these voices, we need to know the practical importance of accurately inverse filtering and modeling individual voice sources. To this end, thirty different voices were synthesized, each with four different sources. Preliminary results suggest that the output of the inverse filter does not always contain enough information about the source to adequately reconstruct vocal quality. However, the LF model of the voice source pulse does provide enough degrees of freedom to model naturally-occurring quality variations across voices.