Maybe you have to try to hear it, but I spend a lot of time in large public parks and, without fail, hear drones flying overhead.

This just started in the last year or so, where virtually every time there's a drone off in the distance.

I don't have great hearing either (especially in one ear), after playing some musical instruments that you hold close to one ear to play. Those things are just loud and stand out when the other noises are the wind in the trees, birds, and the rustle of small animals in the underbrush.