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. struck idiophones
9. directly struck idiophones
10. percussion idiophones
11. percussion idiophones: solid-bodied
12. percussion plaques
13. metallophones

Anotations

Scope note:

Metallophones consisting of tuned, graduated metal bars arranged in two rows suspended from a metal frame with tubular resonators suspended below them; motor-driven spinning discs fixed above the open tops of the resonators produce the unique vibrato characteristic of the instrument.