My high end hearing is so shot that a smoke detector can be beeping the low battery signal and I can’t hear it from 3 feet away. Of course that makes my wife frustrated. “You can’t hear THAT!!??”
I do know that my wife and I cannot hear the same name in the Laurel - Yannie example, but she is definitely hearing what she say she hears. I on the other hand cannot see how she does not hear what I am hearing.
But I do think it is in our brains, because sometimes she hears the same thing that I hear. A told her she is a switch hitter. (LOL)