I don't know, but he sounds like he needs a valium. Dude is so shrill, I had to turn him off.
I've come to the conclusion that tissues stiffen with age, so that eardrums (in this case) lose the ability to respond to higher frequencies.
I know that I certainly have become more sensitive to high-pitched voices over the past few years.
However, ain't no way I'm going to avoid the great grand daughter and I may as well hang with the rest of the squeeky little voices out there as well.
Might miss something I'll regret later.