The Effect of Anchors and Training on the Reliability of Perceptual Voice Evaluation

Chan, Karen M. K.; Yiu, Edwin M-L.
February 2002
Journal of Speech, Language & Hearing Research;Feb2002, Vol. 45 Issue 1, p111
Academic Journal
Perceptual voice evaluation is a common clinical tool for rating the severity of vocal quality impairment. However, the evaluation process involves subjective judgment, and reliability is therefore a major issue that needs to be considered. When listeners are asked to judge the quality of a voice signal, they use their own internal standards as the references. These internal standards can be variable, as different individuals may have acquired different standards in prior situations. In order to improve the reliability of the perceptual voice evaluation process, external anchors and training are provided to counteract the effect of these internal standards. This study investigated to what extent the provision of anchors and a training program would improve the reliability of perceptual voice evaluation by naive listeners. The results show, in general, that anchors and training helped to improve the reliability of perceptual voice evaluation, especially in the rating of male voices. Furthermore, it was found that anchors made up of synthesized signals combined with training were more effective in improving reliability in judging perceptual roughness and breathiness than natural voice anchors.


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