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. lip-vibrated aerophones
9. [lip-vibrated aerophones with conical bore]
10. [lip-vibrated aerophones with conical bore: with valves]

Anotations

Scope note:

Chromatic horns developed in the 19th century, incorporating several different lengths of tubing in the form of fixed crooks and various devices such as plungers, sliding shutters, and valves to bring any desired tube length into play.