DS had/sometimes still does have issues with sound. Unlike the boy in the movie, he would cover his ears at seemingly insignificant sounds as if they were "extremely loud".
As a baby, he'd cry for no apparent reason. Nothing would comfort him and even colic "remedies" were useless.
Later, when he was older, I asked him about that and if he remembered crying so much. He said he did. He said he didn't like all the talking around him!
I don't know if it was because he had highly sensitive hearing or if it was because he knew others were communicating without his understanding-he didn't elaborate-and I'm honestly not entirely sure he understood the fantastic thing he just said.
All I do know is I didn't know he was gifted when he was an infant and so had no idea he could even conceive what talking was.
