Which sound is hard to ignore?

I think it would be the sirens of medical ambulances or firetrucks. It's a warning or an alarm that something has happened nearby. Sometimes a signal to evacuate places that are hazardous.

A few sounds that I find difficult to ignore are my dogs snoring when I am trying to sleep and my birds chirping all day long. Believe me I love my pets very much, but after a while between the snoring and the chirping it can be pretty hard to ignore. I need to invest in earplugs. What do you think? Best of luck to you.