I really don’t think this is the right approach. Plenty of motorcycles have speakers built in, and they’re blasting Creedence all the time. They should be allowed to.
What the officers are doing seems more akin to a business use to me, since they are doing it to affect how they can perform their job, so I'm curious if they need to license the songs.
Early in the evenin' just about supper time
Over by the courthouse they're starting to unwind
Four kids on the corner trying to bring you up
“Headphones, please” you shout at them “and kindly shut the fuck up”