Taos Hum, Taos, New Mexico, USA 1992. It was in 1992 that the Hum phenomenon began to be reported in North America following complaints from many citizens living near the town of Taos, New Mexico. The University of New Mexico undertook studies of hum sufferers in Taos. One of the researchers reported that the Hum was close to 66 hertz, two octaves below middle C, although it could go as low as the lowest E on a piano. An ongoing low frequency noise, audible only to some, is thought to originate somewhere near this town and is consequently sometimes known as the Taos Hum. Those who have heard the Hum usually hear it west of Taos near Tres Orejas. The Taos Hum was featured on the TV show Unsolved Mysteries, and it was also briefly mentioned in an episode of The X-Files.