Stopped single end-blown flutes
Partly-stopped single end-blown flutes
Hornbostel - Sachs
Open single end-blown flutes
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 single tube.
(Single) end-blown flutes
End-blown flutes