The Taos Hum is a low-frequency sound that has been reported by residents and visitors in the town of Taos, New Mexico. This mysterious hum is often described as a persistent, droning noise that is audible indoors and outdoors, but its source remains unidentified. Despite various investigations, including studies by the U.S. government and researchers, no definitive explanation has been found. The phenomenon has led to numerous theories, ranging from industrial noise to natural geological activity, but the true cause of the Taos Hum continues to elude scientists and locals alike.