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The digital watermarking scheme is designed for high quality music by using the direct-sequence spread spectrum technique. Both the un-detection probability for the music with the watermark and the erroneous detection probability for the music without the watermark are examined. Excellent results are obtained, that is, both of the probabilities are less than 10-8. The quality of the music embedded...
We have investigated whether ultrasound changes our audible impressions when we listen to music or not. To solve this question, we verify that there might be a mechanism perceiving ultrasound by a physiological pre-experiment, and review discrepancy in subjective estimations for two kinds of sounds played back with and without ultrasound by a psychological experiment. In this paper, we study whether...
Sustained mental work easily causes mental fatigue. Comfortable environments are necessary to be introduced into mental work. It is very practical research to explore the characteristics under progressive mental fatigue and make a suitable work-rest schedule. In this research, a work-rest schedule containing mental calculation task and music relaxation is specially designed to reflect effect of prolonged...
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