Well I'm much less a cockatoo expert than others here like Scott ETC haha.

Just sit on the couch and talk to them wherever they are, no need to be right up next to them. It's going to take you months, maybe even over a year but as long as you take your time she could very well come around.

As for noise, they don't make noise 24/7 but you can hear when they're having a good play, and so can the surrounding area! They have vocalizations for fear and for boredom too. You just need to learn what noises are what with yours