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. idiophones
8. friction idiophones

Anotations

Scope note:

Instruments that produce sound by rubbing aluminum rods instead of plucking strings, and which can be played vertically or horizontally. An original version was invented by John Calhoun Deagan and called an “aluminum harp.”