The ring bell has been a fixture of boxing for well over a century, sounded by the timekeeper to open and close each round and to signal the end of a bout. Because it is so closely tied to organised fighting, the sound quickly became shorthand in film, television and online video for any contest, confrontation or decisive moment. Creators now borrow it far beyond the sport itself, using its familiar ding to frame rap battles, gaming duels, argument clips and playful showdowns without needing any explanation.