Radio transition sounds like this one come from the language of broadcast, where short sweeps, static bursts and station idents have long signalled a change of segment or presenter. Online creators adopted the same cue for video and audio editing because listeners instantly recognise it as a clean break, even without a visual change. It is now a staple in podcasts, livestreams, YouTube videos and short-form edits, where a three-second sweep can reset attention, mark a new topic and keep a fast-paced edit feeling smooth and professional.