Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Sound Devices (hierarchy name)
5. sound devices (equipment)
6. [sound devices by acoustical characteristics]
7. aerophones
8. reeds (aerophones)
9. reedpipes (confined aerophones)
10. [reedpipes with single reed]
11. [reedpipes with single reed: with cylindrical bore]
12. double clarinets

Anotations

Scope note:

Any of a group of pipes or sets of pipes, usually consisting of a single piece of wood with two narrow cylindrical bores each having an idioglot single reed, less often of two pipes inserted into a common stock which holds the reeds. Some terminate in bells or are attached to bags.