I may be misremembering, and if I am I'll apologize in advance, but I do believe that wraith has started threads in the past about the problems he's had at assorted workplaces...
If I'm correct, then I can only observe that if one person is having problems at a number of different worksites, the problem is probably with his attitude...
In this particular case, what's the big deal?? I would have made some kind of small joke, like English is my second language, I originally come from Mumblania, then I would have repeated what I'd said so that the boss could hear it...
My problem is the exact opposite, my boss is VERY soft-spoken, so that I often can't hear him, and have to ask him to repeat himself...