Phase models in analysis/synthesis of voiced sounds

This article presents an overview of the problems involved in modeling the phase in analysis/synthesis of voiced sounds. A number of informal experiments for monaural sounds are presented, demonstrating the problems and possible improvements to these kinds of systems. Furthermore, a number of psycho-acoustic experiments are presented, for assessing the importance of phase information regarding the spatial qualities of synthesized sounds. Binaural recorded sounds are synthesized using additive analysis/synthesis with and without phase information. The phase information is used in the synthesis to preserve the characteristics of the waveform. The experiments show the importance of phase when dealing with localization of voiced instruments.