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]

Narrower term/s

• euphoniums
• helicons
• sousaphones
• Wagner tubas

Anotations

Scope note:

Valved brass aerophones with a wide conical bore terminating in a flared bell, played with a cup mouthpiece; they are used as the bass or contrabass members of band or orchestral brass sections.