Radio click sounds have long been recorded as everyday foley from real radios, walkie-talkies and car stereos, so there is no single original source for this short clip. The effect spread through sound libraries, editing packs and soundboards because it solves a common problem, showing a device turning on without needing footage of the switch itself. Online, editors reuse it for transitions, retro technology montages, military and police roleplay clips and fake broadcast intros, where one familiar click instantly tells viewers that a signal has started or a new frequency has been found.