Hey! Quess What! They've had a bone conducting devices since the 80's. It was manufactured by DAK ind. At the time they named it "bone phone", even though it was not a telephone. It did have am/fm sterio , and cassette player. It was about 3' long, looked like a stocking , wrap around neck , vibs conducted through collar bone, up through head. People around you could not hear divice, only the wearier can hear the divice. Love it, works great, hard on batteries, old tech stuff.