What a strange non sequitur. I've never said "I don't need a bell because I have an Air Zound" or vice versa. There's no overlap in when I'd use them. The Air

What a strange non sequitur. I've never said "I don't need a bell because I have an Air Zound" or vice versa. There's no overlap in when I'd use them. The Air Zound isn't a polite way of telling a pedestrian or cyclist you're passing them. It's more like yelling "move over, jackass!" I can count on one hand the number of times I've used mine on a trail—only when folks were (perhaps deliberately) unaware of more subtle attempts at communication and blocking me from passing and/or doing something reckless. In the few cases I did use it on a trail, people involuntarily jumped in response. On the other hand, the Air Zound is a way of telling cars "I'm here" / "be careful" / "don't do the stupid thing I see in your eyes". I use it in that way almost daily. (Maybe as much a commentary on the drivers around here as anything else.) A bell just wouldn't work for that at all. They really wouldn't physically hear it. (I'm a road cyclist and the trails I ride are paved urban creek trails rather than mountain bike tracks, but I think the etiquette is similar.)