Cross-modal perception occurs when two or more senses interact with each other.
An example of cross-modal perception is synesthesia, a condition in which the stimulus of one sensory system leads to the involuntary response by another sense. People with synesthesia can 'hear' color or 'feel' noises.
Another example of cross-modal perception is the McGurk Effect, which is an interaction of visual and auditory stimuli. Research shows that infants have the capacity for cross-modal perception.