Public address chimes have been used in airports for decades to quiet a terminal and signal that a spoken message is about to begin, often before boarding, gate changes and safety notices. The short multi-note tone became widely recognisable beyond travel as films, television and social media copied the same pattern for parody announcements. Shared online as a standalone ding sound effect, this starting chime is now used far from any airport, dropped into edits whenever a creator wants an official, attention-grabbing opening without recording a real terminal announcement.