Stopped side-blown flutes without fingerholes
(Single) side-blown flutes
Stopped side-blown flutes with fingerholes
Hornbostel - Sachs
The air itself is the vibrator in the primary sense. The standing waves are significantly confined within the instrument itself. The player blows against the sharp rim of a hole in the side of a tube. The distal end of the tube is stopped.
Stopped side-blown flutes