"Ding-Dong" is a sound often associated with doorbells, signaling someone's arrival. It typically consists of two distinct tones: the first "ding" is a higher pitch, followed by a lower "dong." This sound alerts homeowners that a visitor is at their door, prompting them to answer. In popular culture, "Ding-Dong" can also refer to various songs, phrases, or even characters. For example, the phrase is famously used in the song "Ding Dong! The Witch Is Dead" from the movie "The Wizard of Oz". This catchy tune celebrates the defeat of the Wicked Witch, making "Ding-Dong" a memorable part of entertainment history.