Dixie I'm the same.
At first it was only yanny, then it was Laurel, then back to yanny again.
Now I can hear both!!!
Btw, I found that when I was hearing yanny, if I put my phone speaker in my mouth, I could hear Laurel.
But now I can hear what I choose to hear.
I've killed my phone battery playing it over and over again today though 
