Abstract
The previous study results in 2014 showed that quiet and slow music makes time feel shorter, and dynamic and up-tempo music makes time feel longer than real time. Since each type of music can potentially paint a mental color image, additional experiments were conducted in 2015 to examine whether the harmonic sound of C-major, minor, sus4, and diminish could evoke images of color. The results were quite similar to the observations in special-ability individuals who can create a mental color image using sounds. Harmonic sound can evoke color, and the color can evoke the related functional images suggested by the environmental design. Harmonic sound could be a substitute to verbal announcement.