The difference between native speakersí and non-native speakersí naturalness judgements of synthetic speech is investigated. Similar/different judgements are analysed via a multidimensional scaling analysis and compared to Mean opinion scores. It is shown that although the two groups generally behave in a similar manner the variance of non-native speaker judgements is generally higher. While both groups of subject can clearly distinguish natural speech from the best synthetic examples, the groupsí responses to different artefacts present in the synthetic speech can vary.
Bibliographic reference. Janska, Anna C. / Clark, Robert A. J. (2010): "Native and non-native speaker judgements on the quality of synthesized speech", In INTERSPEECH-2010, 1121-1124.