For some people, hearing certain sounds may activate color-sensitive regions of the cortex so as to trigger a sensation of color. this phenomenon is called

Synaesthesia

Explanation:

Synaesthesia  is disorder state in which senses of the body get linked with each other that was not connected previously. This condition produces automatic response in another sense organ when simulation takes place in a particular sense organ.

This neurological disorder can occur in a person through inheritance at time of birth or early stage of childhood.Example of synaesthesia are individual feeling sensation on body while smelling certain fragrance or odor, seeing sounds etc.

classical republicanism, also known as civic humanism, is a form of republicanism  developed in the renaissance inspired by the governmental forms and writings of  classical  antiquity, especially such  classical  writers as aristotle, polybius, and cicero.