Airport announcement chimes became a universal audio shorthand because major terminals use a similar pleasant ding sound effect before public address messages about departures, delays and final calls. Online, creators lifted that short PA tone from travel footage and sound libraries and reused it as a standalone effect. It spread in travel edits, comedy sketches and meme videos where an ordinary moment is treated like an official flight announcement. It remains popular because the sound instantly establishes location and anticipation in under two seconds, without needing any airport footage at all.