Radio tuning sounds have long been a staple of stock sound libraries, where they are used to suggest old broadcasts, travel, and the passage of time without needing dialogue or music. This version focuses on the AM and FM switching effect, with interference and brief station fragments that make it easy to recognise even at low volume. Online, creators reuse it for nostalgic edits, period pieces, comedy sketches about changing channels, and transitions between clips. Its staying power comes from that instant familiarity: almost everyone has heard a radio search for a signal.