Stopped sets of notch-flutes or panpipes
Open sets of notch-flutes or 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 notch at the upper open end of a tube. Several notch flutes of different pitch are combined to form a single instrument.
Sets of notch flutes or panpipes
Hornbostel - Sachs
Notch flutes