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. organs (pipe organs)

Additional parents:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment
4. Sound Devices
5. sound devices
6. sound devices by function
7. musical instruments
8. mechanical instruments

Anotations

Scope note:

Organs involving a set of graded whistles operated by steam or compressed air, played by means of a keyboard, pinned cylinder, or paper roll. Producing a great volume of sound, their typical use has been outdoors, such as at circuses, fairgrounds, and on steamboats.