Citizen band radio, usually shortened to CB radio, became a cultural staple in the United States during the 1970s, when truck drivers used it to share road conditions, warnings and conversation across long highway routes. The static heard here is the natural sound of an analog receiver searching between channels, picking up interference and weak distant signals. That raw, lo-fi texture has made it a favourite in films, games and online videos, where it instantly signals old technology, isolation on the road or a broken connection without needing any explanation.