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:

Concert pitch, nontransposing aerophones of conical bore, constructed in circular shape with three piston valves and the bell directed either upward or forward, usually played at 9 foot C pitch; invented around 1870 by one of the English Distin family, and intended for use by amateurs.