The name refers to Rohan, the horse-centered kingdom from J. R. R. Tolkien’s Middle-earth and its depiction in The Lord of the Rings film trilogy released from 2001 to 2003. Horn calls are closely associated with military signaling and the Rohirrim’s dramatic battlefield presence. Short clips labeled as a Rohan horn circulate online as fantasy reaction cues, especially for entrances, charges, reinforcements, and medieval-themed jokes. The sound remains useful because one compact blast immediately suggests urgency, distance, and heroic spectacle.