Answer:
The disorder is known as synesthesia.
Step-by-step explanation:
Synesthesia is a neurological condition in which the stimulation of one sensory path automatically stimulates a second sensory path, thus mixing both and making the individual experience both sensations.
When one sense is activated, for example sight, a second unrelated one is activated as well, for example hearing.
An individual with synesthesia can "hear colors" or "see sounds", for example.
In other words, synesthesia is a non pathological variation of human perception.