Since then, the debate has taken off, as people all over the Internet can't stop arguing over what the real word being said is.
And the discussion has reached all the way to Congress.
The clip, which has gone viral, has left some people convinced they have heard the word "Yanny", while others believe it says the word "Laurel".
Douglas Beck, an audiologist at Oticon, told National Geographic that there is a difference between hearing and listening.
Yanny and Laurel are the new blue and gold dress.
A few people have uploaded videos showing that if you change the pitch or the bass, it can alter whether you hear Yanny or Laurel - but alas, I still hear the same thing.
"We're on the deeper side", Pesono said. That is, you can hear while you're asleep, and so in that regard, hearing is passive.
"What I was hearing was both Laurel and Yanny".
Perhaps the Yanny-Laurel Illusion will divide humanity down the middle like cat versus dog people, glass-half-full versus glass-half-empty people, and for the same unknown reasons.
One Twitter user pointed out if you shift the pitch in the audio, "you can hear different things".
Someone replied to that fix though, and said: 'I hear yanny in the original vid and yanny in this speed up one.
Some odd people insist they hear both words. It's an audio clip that repeats one word; Over and over again. Some of the variation may be due to the audio system playing the sound, [Lars Riecke, an assistant professor of audition and cognitive neuroscience at Maastricht University] says.
The scientific explanation centers more on the quality of the recording and the resonance of speech sounds. He also recorded himself saying "Yanny" and "Laurel", for comparison. It apparently has something to do with people being attuned to different frequencies, which affects how the sound is interpreted. "So Laurel was louder and lower, and Yanny was higher and softer, more like a whisper".
There's also something to be said about hearing something you're told to hear.