Why are you sticking your finger in your ear? Shhhhhh....I'm making a cell phone call

I had heard about this technology before but here is an article that finally names this bizarre technology (FingerWhisper) where vibrations are sent through your hand so that when you put your  finger in your ear, you hear sound. (ou know that funny phone symbol we make when we’re saying “I’ll call you” across the room to our friend? Well, just stick that thumb in your ear and put your pinky finger near your mouth and voila – instant human cell phone.