Our perception of pain is more than just a physical sensation; it has cognitive, emotional and social components.
The sound of the dentist's drill is one of the sounds most commonly associated with pain and it causes fear for many people. The sound of the drill and the perception of pain are inextricably linked so that those who respond worse to the sound will actually experience greater pain.
This drawing gives a visual representation of the sound of the drill to allow people to encounter it in a new way and experience a range of unaccustomed responses.