Jungheinrich is a German manufacturer of forklifts and warehouse equipment, and its reach trucks, called Schubmaststapler in German, are common in warehouses and distribution centres. Their horns are built as safety signals for busy aisles where pedestrians and other vehicles share tight space. Short clips of the beep began circulating on soundboards as a niche industrial sound, separate from car horns and truck horns. It stays useful because the tone is instantly recognisable as workplace machinery, making it handy for logistics jokes, simulator videos and edits set in warehouses.