It's because the audio clip has two different sounding words at different frequencies.
People who hear "Laurel" are likely also hearing "Yanny" but they can't distinguish it because it's part of the overall harmonics that makes up "Laurel".
Vlogger Cloe Feldman posted a four-second clip on Twitter on Monday asking users what they heard.
Some linguists at the University of Alberta gathered to dissect and try to come to an agreement on what's being called an audio "illusion".
However, they report that age isn't the only reason that the audio may be heard differently by different people.
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The creator of the viral sensation spoke out and sorry to say "Yanny" listeners, he confirmed he said "Laurel".
On Wednesday, the Reddit user, whose post has polarized the internet, explained the audio is from Vocabulary.com of "Laurel."
Roland Szabo, 18, said he recorded the seemingly innocuous audio from a vocabulary website while doing a project for his school in the U.S. state of Georgia.
RNZ Auckland staffers unanimously heard "Yanny" in the clip, however further investigations showed it was possible to hear both words depending on the type of headphones worn.
"The language that we produce is actually really complex, and I think it's good for people to think about that and to realize how complex language is".