Delta Air Lines, one of the largest airlines in the United States, uses standardised cabin chimes and PA announcements to signal rules like the no smoking policy, which has applied on US flights for decades. Short recordings of these cabin sounds became popular online as creators collected recognisable real-world audio for memes and edits. The polite, official tone is exactly why it works as a joke: it lends instant authority to any punchline. Today it appears in travel vlogs, parody airline skits and reaction edits across social platforms.