Interesting. Headphones empirically do not work in my situation. Maybe a neon-pink Do Not Disturb sign above my monitor that I can flip into position when I want to zone.
Do headphones not work with everyone, or only with a subset of people? It wouldn't surprise me if some people didn't take the hint, but I guess I'd be surprised if nearly everyone missed it.
I know one person who tried a Do Not Disturb sign. Like yours, it was a bit over the top, and that seemed to help. Again, worked with some of his coworkers, and not with others.
I've found headphones work better if I use them no more than 30-40% of the time or so; then people wait until I don't have headphones on to ask me something. Doesn't work if I have them on all the time.
