Abstract
We checked the effect of the sleep on auditory perception using Noise-vocoded speech sounds (NVSS). NVSS has the amplitude envelope of the speech signal, whereas the detail spectral structure was repealed with band noise. In this study, we examined facilitative effect of sleep on -perceptual learning of NVSS. Ten Japanese speakers participated in this experiment. One session consisted of Japanese words in NVSS (four moras words). The subjects divided in two groups and each group was given a pretest, training, post-test 1 and after a 12-h retention period post-test 2. For first group started at 9:00 AM, and the post-test 2 were given after 12 h of waking at 21:00 PM. For the second started at 21:00 PM, and the post-test 2 were given at 9:00 AM the next day after 12 h including sleeping period. As results, the improvement of results by the sleep was not seen definitely.
