(Single) oboes with cylindrical bore
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 lamellae. The double-reed pipe has a reed of paired lamellae (usually a flattened stem), which periodically open and close, controlling the flow of air and a cylindrical bore. In each pipe of the set of single-reed reedpipes, 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. The instrument is tuned by altering the lengths of the air columns. Northumbrian small-pipes, Scottish small-pipes.
Single oboes with cylindrical bore combined with a set of reedpipes with single reed
Hornbostel - Sachs