Mongol hoomii or throat singing involves producing two simultaneous tones with the human voice. It is a difficult skill requiring special ways of breathing. One tone comes out as a whistle-like sound, the result of locked breath in the chest being forced out through the throat in a specific way, while a lower tone sounds as a base. Hoomii is considered musical art, not exactly singing, but using one’s throat as an instrument.
Depending on the way air is exhaled from the lungs, there are various ways of classifying hoomii, including Bagalzuuryn (laryngeal) hoomii, Tagnainy (palatine) hoomii, Hooloin (guttural) hoomii, Hamryn (nasal) hoomii, and Harhiraa hoomi: under strong-pressure in the throat, air is exhaled while a lower tone is kept as the main sound. Professional hoomi performers are found in only a few areas with certain traditions. The Chainman district of Hovd aimag (province) is one home of hoomii. Tuva, a part of Russia to the north of Mongolia, is also a center of Hoomii.