I was wondering what will happen if I was wearing headphones or asleep (or both) and I missed the in-flight food? I don't want to miss it, but I know when I get lost in my music or fall asleep I hardly notice anything around me...Is this possible? How does the staff inform the passengers about the food?

This might come off as kind of a dumb question, but I've never travelled long-haul before, and I'm very paranoid by nature.