I just noticed a second audio recording on that page. And there, "Laurel" is clearly audible. But in the original, no, it wasn't.
The second is clearly "Laurel."
I can't even imagine how to hear it any other way.
The method of Ples and Heroist doesn't work for me.
Benjamin Munson, a professor of hearing sciences at the University of Minnesota, suggested that "Yanny" can be heard in higher frequencies while "Laurel" can be heard in lower frequencies.[1] Older people, whose ability to hear higher frequencies is more likely to have degraded, usually hear "Laurel".
The audio clip originated from a recording of Jay Aubrey Jones, an opera singer