Two-way radios became a staple of police, military and emergency work during the twentieth century, and their distinctive squelch, beeps and static were quickly adopted by film and television sound design. Online, the generic walkie-talkie sound spread through soundboards and edit libraries as a shortcut for off-screen communication, dispatch calls and tactical roleplay. Korean uploads titled mujeongi sori collect the same familiar radio cue for local creators. It remains popular because a tiny burst of static instantly explains who is talking, where they are and why the message feels urgent, without any extra exposition.