All White Cats Deaf. If you notice that your cat never comes over when you call him or that he doesn't react when you drop something loud at Deaf cats are just like hearing cats in all other ways.
Some people say that deafness in a cat is due to hearing loss, but the change in ear canal size does not change how the cats here, and there is no evidence of any other loss of hearing that would make a cat deaf. Deaf cats are just like hearing cats in all other ways. The deafness is caused by degeneration of the auditory apparatus of the inner ear and may affect one ear (unilateral) or both (bilateral).
It is curious to note that that particular cat could have shown a wide range of colors.
Blue eyed white cats do have a higher risk of being deaf than other cats, but they're not all deaf. You could get her hearing tested, it's called a baer test. It sounds like yours clearly are not totally deaf, since you have plenty of examples of them responding to sound. Blue eyed white cats do have a higher risk of being deaf than other cats, but they're not all deaf.