Do you hear far or bar? The deafening ‘McGurk Effect’ illusion divides everyone – The Irish Sun

A COMPREHENSIVE optical illusion that changes what you hear has been revealed.

People can’t care less about a BBC clip being shared tick tockshows a man apparently saying “Bar”.

Scientist reveals how the trick works


Scientist reveals how the trick worksPhoto Credit: TikTok/BBC

Then his lip movements change and he seems to say “far”.

But all is not as it seems.

The sound is actually exactly the same, but the lip movements affect what we think we’re hearing.

In fact, the tone says “bar” all the time – it never says “wide”.

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This is due to a phenomenon known as the McGurk effect.

This essentially affects how we hear a word based on how we see it pronounced.

That’s because the way someone speaks actually changes how we hear the sound.

“In the illusion, what we see overrides what we hear, so the mouth movements we see when looking at a face can actually affect what we think we’re hearing,” explained Professor Lawrence Rosenblum of the University of California Riverside.

“If we close our eyes, we actually hear the sound as it is.

“If we open our eyes, we actually see how mouth movements can affect what we hear.”

The funny thing is, even if you know the effect exists, you can’t prevent it.

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Commenting on TikTok, one user said: “Who they are fooling because he’s clearly making a different sound. Look at the mouth.”

Another added: “You are right. I tried that without looking at the screen and all I could hear was bah bah bah.”

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