I came across this bit of advice on the matter: http://www.schizophrenia.com/schizoph/hallucontrol.html

My pdoc thought it was very atypical of auditory hallucinations when I told her how a voice was shouting in my ear while I was driving my car, and after a while I shouted back at it and told it to shut up. Within about a minute it did go away, leaving my ear aching for hours. She said that auditory hallucinations don't normally go away when we talk to them, and she seemed a bit sceptical of my account.
Still, it worked that time for me.