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: natural]

Anotations

Scope note:

Most commonly keyless, valveless aerophones with a wide conical bore, usually though not always coiled, and a cup mouthpiece, now used chiefly for military and parade use. Early in the 19th century, the addition of keys and valves lent a full chromatic scale: for these instruments use "keyed bugles."