This kind of two-tone cabin chime is a standard feature of commercial air travel, used by crews to get passengers' attention before an announcement about safety, service or landing. Because the sound is so widely recognised from real flights, it has become a useful shorthand in online videos, podcasts and edits for anything connected to flying, holidays or departures. Its short length and clean finish make it easy to drop into intros, transitions and skits without distracting from the dialogue that follows.