In chapter 9, after being beaten up, Nick Andros is left in the middle of the road in the path of an oncoming car. "...and the screaming sound of brakes and tires filled the world as he waited numbly to be run over." How did he hear that? He was a deaf mute!
Well, I guess you could be generous and say there are different levels of deafness. Some people can hear extremely loud noises, high-pitched noise, low pitches only, etc, and yet not be able to hear or understand conversation. On the other hand, could be King just boo-booed and forgot who he was writing about.
It say the sound filled the world, so you can either take it literally that he didn't hear it but the rest of the entire world did or admit King's describing the guy being overwelmed by the sound despite being deaf.
I think that the way he described the scene was for the reader of the book, using the word numbly to describe Nick showed that Nick had no idea what was going on and could not hear the sounds around him.
Also when nick wakes up after he got jumped by those guys you can hear an owl hoot. When it hoots you see Nick turn his head to look for what made the sound.
I'm starting to think he isn't deaf.