ouch. I wear custom molded ear buds all day at work as my sound source hearing protection. Not sure if I would want them all of the time and they do block out sounds around you so they can be a bit unsafe.
I'm not the search police, just possibly helping you find more info. If you haven't already searched these forums for Logitech UE, there are a couple of earbud / headphone threads by people who know a lot more than me.