What are you listening to? Yanny or Laurel pic.twitter.com/jvHhCbMc8I
1; Cloe Feldman (@CloeCouture) May 15, 2018
In short, scientists say what you hear depends on what does your brain care about, whether you have heard something similar in the past and what you expect from the clip. Another explanation for the same is to do with hearing loss, with the higher frequencies being lost as adults get older.
So who invented this ambiguous audio clip? A detailed report of Wired sheds a little more light on its history and origins and links it to vocabular.com, a resource site that uses the word defined "wreath worn on the head, usually as a symbol of victory." And if you were wondering what the actual word was behind it, it was that it should be pronounced as, the word would be "laurel".  Wired was able to connect with vocabular.com's CTO, Marc Tinkler, who told them that the voice was one of 2,000,000 words originally recorded by opera singers, because they had one The few persons were aware of how to read words written in the International Phonetic Alphabet (IPA).
The IPA is a system of phonetic notation developed by linguists to make each alphabet accurately and uniquely understood by all people.
As for the word "laurel" was reportedly added by a member of the original cast of CATS on Broadway
So if the inclusion was on a website on the Internet? Who found it? And who made it popular?
Now, as the story of Wired shows, it all started on May 11 at the Flowery Branch High School in Georgia, in the US, where Katie Hetzel, a freshman, studied the word for literature class.
She looked up the word "laurel" on vocabular.com and instead heard the word "yanny" after playing the audio file.
As with all others who find a discrepancy, she asked her classmates with mixed results. Post she uploaded it to her Instagram story and soon enough, another senior named Fernando Castro releases the clip for his Instagram story as a poll.
Soon enough Reddit user Roland Camry (a friend of Castro) discovered the same, and then put it on a channel called r / blackmagicfuckery which made it viral on the Internet.