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 modifying devices

Narrower term/s

• speaking trumpets

Anotations

Scope note:

Hollow devices used to intensify and direct the sound of a voice, usually, though not always, taking the shape of a long cone with a small hole at one end through which the user speaks, and a much wider opening at the other from which the sound emerges.