The klaxon was originally an electromechanical horn patented in the early 1900s and widely used on cars, submarines, and factories as a warning signal. Its distinctive two-tone blast later became a stock sound in cartoons, films, and video games whenever an alert was needed. Online, creators use this clip and similar danger alarm sound effect meme sounds for exaggerated warnings and comedy alarms. Because the tone is instantly recognizable across generations, it still works as a universal shorthand for attention, danger, or an urgent arrival without needing any explanation.