The only thing in the article that has to do with wireless headphones is watching for devices in discoverable mode and using that to physically track movements.
Most (all that I know of, but I’m a be generous here!) Bluetooth headphones have to be made discoverable temporarily and turn it off after they’re paired, so this is more like you could be tracked locally by an array of bt receivers if you’re walking around with the button on your headphones held down.
The other thing in the article that applies to all people with phones or computers or whatever is the relatively old news that cops buy data from data brokers instead of doing investigations.
Honestly, Bluetooth sucks. I'm incredibly sick and tired of everything trying to use ancient technology for far more than it was ever intended. Besides, it never works the way it should anyways.
I once lost a pair of expensive Bose wireless headphones. Somebody told me that I could use the app and track their location.
I said, oh hell no, they can keep them!
Nice as they were, I will not be purchasing again.