On Synaesthesia and Seeing Sound

What is synaesthesia?

 
In a nutshell, synaesthesia is cross-sensory perception. For example, a person hears or smells colours or shapes; sees or tastes sound. In other words, stimulation of one sense leads to experience in a second sense. People with synaesthesia have stronger connections between the language and colour areas of the brain. As a result, they tend to have better memories.

According to the science, one out of 100 people have this ability. It is considered a trait, not a disor...