Khuumii-throat singing

Mongol khuumii 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. Khuumii 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 khuumii, including Bagalzuuryn (laryngeal) khuumii, Tagnainy (palatine) khuumii, Hooloin (guttural) khuumii, Hamryn (nasal) khuumii, and Kharkhiraa khuumii: under strong pressure in the throat, air is exhaled while a lower tone is kept as the main sound.Professional khuumii 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 khuumii.