How one hears it is similar to how people viewed a dress on the internet three years ago.
On Tuesday, a short audio clip went viral and seemed to be tearing the Internet world apart.
"I asked my friends in my class and we all heard mixed things", Hetzel told Wired. Some people say they hear the word "Laurel", while others hear something totally different: "Yanny".
In the comment section of where the post first appeared on Reddit, someone explained that the difference in audio perception has to do with bass frequencies.
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But even if that explains which word was originally spoken, what accounts for the fact that some listeners hear something completely different? She said she heard Laurel.
An audio sample making the rounds online is proving so perplexing, what people hear sometimes depends on the time of day, or the device they're listening on.
The seconds-long soundbite has provoked intense discussion on social media as well as in offices and living rooms across continents, as people adamantly insist that their version is indeed what the synthetic voice is saying. So if you're listening on your phone, laptop speakers or through cheap headphones, you might hear something different than with a high-quality sound system, CNET reports.