Thank you, Misti!
Tell your sister she needs to go back and have her hearing aids adjusted to lessen the background noise. They can do that fairly easily. When they're programmed correctly, they'll work much better in her ears than in a drawer.
That said, no hearing aid can make a person hear as well as they did before their loss. Even with the best technology, it sounds more like listening to the real world through earphones...not quite natural. I still ask people to repeat themselves, but not nearly as often as I did before I got the hearing aids.
Hugs to you, and give Rae a smooch for me, too!