Edit 2: I originally didn’t think of the case when you want to warn pedestrians that you are passing (without asking them to give way) in case they decide to switch direction without looking if there is any incoming entities. That seems legitimate to me. Although giving a wide enough berth might be better than doing it routinely (that could amount to a lot of noise eventually).

Edit: Since people seem to go either way: It is my understanding that in my part of the world (in Scandinavia) cyclists do not have the right of way on sidewalks (which means they can’t bell people away). They also (and I know this one) do not have the right of way while cycling across road crossings. Something that most cyclists, in my experience, violate all the time.

Quite. It drives me up the wall when cyclists not only use the sidewalk close enough to me to practically graze me (pedestrian), but expect me to actively pay attention and yield to them. Use the road, dummy (there are scarce few bicycle lanes).

I use regular headphones (not over-ear and not really noise canc.) on the sidewalk but take them off when I am crossing the street. And I of course am mindful of other pedestrians. But I’m not gonna take them off because some two-wheeler thinks they can ram into me unless I jump out of the way on the sidewalk.