Hornbostel - Sachs
Vessel flutes with duct, with fingerholes
The air itself is the vibrator in the primary sense. The standing waves are significantly confined within the instrument itself. A narrow duct directs the air stream against the sharp edge of a lateral orifice. The body of the flute is in the form of a vessel, with two or more fingerholes. Ocarina.
Vessel flutes with duct, with two or more fingerholes