I have been recently (last year or so) 'bothered' by some of the vocal patterns and inflections of some youngish female TV news anchors. Alex Wagner of MSNBC was the one that caused me to Google the issue.
Turns out it is a well known and documented phenomenon. My original search was "young women" "raspy voices" and LO! Many hits...

What is really noted is famous entertainers I don't see much of, like Brittny Spears and a Kardashian or two...etc. But a little looking at links shows it is kinda common.

Scientific American article

from this article at Huffington Post

Why worry about it? In the case of TV news, it simply distracts me from what they are saying. (Alex Wagner is a pretty smart graduate of a high school here in the Wash DC area, and she is far from the worse I have heard, but I still cringe.) Contrast these with Kelly O'Donnell, an NBC Pentagon correspondent, who is always clear & pleasant.

I realize that 'some' aspects of a person's voice are beyond easy control, and those who employ vocal fry and similar sounds may have gone beyond being even ABLE to change.... but I wish stations saw this as an issue and gave on-air positions to those didn't rasp and 'vibrate' when they speak.

(Before you tell ME I'm overreacting, read those articles.)