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Reaction Times and Performances in Recognition Tasks to Assess Speech Quality

This paper deals with perceptive test methodologies to assess speech quality of telecommunication systems. Faced with drawbacks of typical methodologies recommended by ITU-T, a new way to assess speech quality is investigated, by collecting reaction times and performances when subjects are achieving tasks involving degraded speech signals. A dual task with a digit recognition memory task and a letter recognition task is proposed. Three different quality levels are applied to audio signals describing digits and letters. The results show significant differences of performances and reaction times between the three quality levels.

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