Source modeling of severely pathological voices
Bruce R. Gerratt, Jody E. Kreiman, Norma Antoñanzas-Barroso, Brian C. Gabelman, Abeer A. Alwan · The Journal of the Acoustical Society of America · 1998
Previous studies using a simplified LF source model [Qi and Bi, J. Acoust. Soc. Am. 96, 1182–1185 (1994)] to describe pathological voice sources indicated that model fit to the return phase is particularly poor. To examine the perceptual importance of differences in how the return phase is modeled, various functions were fitted to the source waveforms that had been obtained by inverse filtering. Voices were then resynthesized using these different source functions, and the resulting signals were compared perceptually to the original natural voice and to versions synthesized with LF modeled sources. The perceptual importance of changes in closing phase modeling for these severely pathological voices will be discussed, as will the range of functions necessary to obtain perceptually satisfactory synthesis of severely deviant voice sources. [Research supported by NIH.]