Sounds interesting
All of a sudden I feel my phone vibrate with a sound that I could only hear if I put my head up to the phone. I wonder if this could be used in the future to talk to people who do not share a language. If I could describe the sound if I may. It was huuuuum dita dita dita dita dit. Then higher huuuuum...dit dit dit. It was almost like I was listening to a humming person.