At the low end when eating out in restaurants occasionally having wait staff ignore him and asking other folk at the table "what would he like", or people assuming that he couldn't hear and talking about him — to at the high end having a guy shouting "deaf fuck" at him repeatedly on the street for no obvious reason.

I'm not trying to say that this happened every day — especially the outright insults. But it was enough to be noticeable.

I suspect, as @hibbelig commented, age had something to do with it.