Haha,
When I turn off my headset and if I occasionally want to listen to my normal sound boxes, I hear voices in my sound boxes, just like a radio.
Usually when this happens, I am playing music. So, sometimes I hear these various voices speaking INSIDE my audio boxes. They play music, advertise, basically everything what a radio does.
Sometimes they speak in German, sometimes in Chinese. It's just funny. This happens rarely, though.