speech. These can be used to train therapists and evaluate and interpret automatic speech recognizers used for diagnosing pathological speech. Moreover, synthetic pathological speech can also be used to make expected therapy aims audible before
treatment. In a listening experiment testing perceived intelligibility, three types of manipulations of tracheoesophageal speech were evaluated by experienced speech therapists. It was found that modeling the intensity contour of the voice source signal improved speech quality over plain analysis-synthesis. Replacing the voicing source with fully synthetic source periods decreased the perceived intelligibility markedly. Making the
source fully periodic with a regular pitch had no effect on perceived intelligibility. Low quality speech benefitted more from manipulations, or deteriorated less, than high quality speech.
Place of publication: Makuhari
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