did you tell him that his voice is distracting? I didn't find out that my conference calls annoyed my coworkers until our annual anonymous survey. Wish I'd known sooner so I could have adjusted by behavior.
I think it seems like a rude question? I have coworkers that keep asking me trivial development questions and I don't really know how to say, "I'm going to need your first reaction to a problem to be Googling it".