What do you mean scares you? I think we're all 12+ here. (Or so I think)
I used to find Rani's voice funny as a kid. But not anymore. Now I think that's what made her kind of unique.
Sridevi's voice can also be painful for the ears, but she used to use it remarkably well and make it sound funny and interesting.
Priyanka's voice used to sound sexy.
Vidya's voice sounds pleasant and clear. It elevates her dialogue delivery.
I have no opinion on the new actresses because I've seen so few movies of theirs.
I am of the opinion an actress voice will only sound scary to children.
But then, every actress do that.