Doorbell and public address tones have been staples of everyday sound design for decades, from school hallways and office buildings to stations where a chime signals that information is about to follow. This second variant circulates on soundboards as a short, clean version that creators can drop in without recording their own intercom. Online it is used less as a literal doorbell and more as a comedic framing device, setting up mock announcements, classroom parodies, and attention-grabbing intros where the joke lands immediately after the tone.