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. electrophones

Narrower term/s

• Hammond organs (TM)

Anotations

Scope note:

Musical instruments that produce sound by means of rotating tone-wheels which themselves produce no acoustic sound but create a regular fluctuation in an electrical circuit which can be converted into an audio signal.