Around my area an "on your left" or "behind you" generally doesn't rate anything. And since a LOT of these folks walking have their earbuds tight or are too busy yakking on the cell phone. When a light chirp on the Noisy Cricket doesn't work, I'll fire it off in all of it's glory.....THEN, because of the way the horn undulates, it ALMOST sounds like a police siren, I manage to get them to turn around and look. Works for me as simply hollering something falls on deaf, or stupid, ears.