Open panpipes
The air itself is the vibrator in the primary sense. The standing waves are significantly confined within the instrument itself. The player creates a ribbon-shaped stream of air with his/her lips, blowing against the sharp rim at the upper open end of a tube. Several end-blown flutes of different pitch are combined to form a single instrument. The lower ends of the pipes are open. The pipes are tied together in a round bundle. Solomon Is., New Britain, New Ireland, Admiralty Is.
Open bundle (pan-) pipes
Hornbostel - Sachs