Hornbostel - Sachs
Reedpipes
The air itself is the vibrator in the primary sense. The standing waves are significantly confined within the instrument itself. The column of air is made to vibrate by the intermittent access of an air stream produced by means of a [single] 'reed' consisting of a lamella which periodically opens and closes an aperture, controlling the flow of air.
Reedpipes with single reeds
Individual reedpipes with single reeds
Sets of reedpipes with single reeds