The NBC chime is the long-running audio signature of the National Broadcasting Company, known for its simple three-note pattern. It became closely associated with American radio and later television identification, making it one of the most recognizable broadcast sounds in the US. Online, the clip keeps circulating because it instantly signals classic network branding, media history and old-time production style. That familiarity makes it useful in edits that parody formal announcements, station breaks or archival television aesthetics.