Color listener / Hi-hich pen

Color-listener is a kind of pen that can let uesr specilly for those are blind,color blindness or color weakness perceptive the color by music.
Color isn’t the objective attribute of any subject .It’s our subjective feeling,also this kind of feelings have some regularity.By taking the use of the synaesthesia,we try to make the people who is not sentative to color to “listen to” color by correponding music.
Experiment says that the color varies red from purple with tone goes up,and the seven major in music just correspond to seven color in optical spectrum.