Role of spectral and temporal cues in restoring missing speech information.

This study measured the role of spectral details and temporal envelope (E) and fine structure (TFS) cues in reconstructing sentences from speech fragments. Four sets of sentences were processed using a 32-band vocoder. Twenty one bands were either processed or removed, leading to sentences differing in their amount of spectral details, E and TFS information. These sentences remained perfectly intelligible, but intelligibility significantly fell after the introduction of periodic silent gaps of 120-ms. While the role of E was unclear, the results unambiguously showed that TFS cues and spectral details influence the ability to reconstruct interrupted sentences.