I took that picture as representing a cop on patrol or on-scene somewhere with his trusty shootin' stick. Cops in my small town don't wear eye or ear while working. It's probably a good idea, though. A pair of the electronic ears and a quality set of glasses they could keep in the car and put on if they get a call that looks bad.
I wonder why more places don't do that? They all seem to wear the stuff on the range?