Told or Known

The Thing I Can Do That You Can Hear

I’m not even sure how I make this sound. My mouth has to be closed, it requires neither exhale nor inhale, and you can see (and if you touch, feel) my upper throat moving when I do it.

When @ContemptSlots was five or six, I asked him if he could make the sound, demonstrated it for him, and he immediately made it back.

I, understandably, have not asked a large number of people if they can make it, so it’s possible it’s not all that rare.