If she is reacting to noise, she sounds fine. There are two kinds of white cats - dominant white and oriental white. Dominant white with blue eyes sometimes (I think 50% ish but I could be wrong) are deaf. It has to do with the development of the neural crest in the brain and melanin (the pigment that makes cats colored.) Oriental white with blue eyes is totally different. It's like a white siamese. I hope I didn't mess up that explanation, I've had 2 odd-eyed white cats, so I know some, but not lots, about blue eyed whites.