I heard Yanny but the NY Times made a cool slider so you can hear both.
https://www.nytimes.com/interactive/2018/05/16/upshot/audio-clip-yanny-laurel-debate.html?module=Wat...
https://www.nytimes.com/interactive/2018/05/16/upshot/audio-clip-yanny-laurel-debate.html?module=Wat...