I remember them from our local hospital here in Germany. When I was a kid in the mid 80's I was in this hospital for a minor surgery for a week. The side tables next to the bed were such "rolling cabinets" with built in radios but without speakers, and no TVs back then. The only choice to listen to the radio was such a " tubed one ear headphone". Very uncomfortable to wear and you barely could understand anything. I was so bored and sad, my family gifted me my first walkman.