abstract:A hand drum is any type of drum that is typically played with the bare hand rather than a stick, mallet, hammer, or other type of beater. The simplest type of hand drum is the frame drum, which consists of a shallow, cylindrical shell with a drumhead attached to one of the open ends.
The time it takes to check your hand remains a little longer than it would take you to drum in your typical four-digit PIN, but in our brief test, it was able to discriminate between two Engadget editors' hands.