[CarelessExpert]

Honestly, as a pedestrian and cyclist myself, wearing closed-backed, ear-obstructing, or noise cancelling headphones as a pedestrian, cyclist, or driver, is pure insanity as far as I'm concerned.

And yes, I'm looking at you, oblivious jogger who can't hear my bell as I pass on a dual-use path.

Get yourself a set of bone conducting headphones if you want to be out and active and listening to music or whatever. The technology is amazing and it's infinitely safer.