The McGurk Effect: hearing with your eyes.

Four faces appear on a screen, speaking simultaneously. Depending on which face we focus on, we hear a different syllable: da-da-da, fa-fa-fa, ba-ba-ba, la-la-la, or tsa-tsa-tsa.

We perceive the spoken syllable and the speaker’s facial expressions at the same time. The brain seems to prioritize the visual signal (lip movements) over the auditory signal. This is how we hear with our eyes.