Ultrasound influence on impression evaluation of music

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 we can distinguish between the two of those sounds by subjective estimations or not by using discriminant analysis in multivariate analysis technique. As a result, we discriminated those two kinds of sounds with a high rate on drum music. This result suggests that ultrasound affects our audible impressions when we listen to music.