Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]
6. sound device components
7. resonators

Anotations

Scope note:

Simple bronze conical tubes attached to the inside of a guitar’s sound hole that accentuates the instrument’s bass register and directs the sound towards the listener. It is a standard component of many guitars built in the 19th century, but has fallen from use in contemporary guitars.