soundbox,
body a resonating chamber in a musical instrument (as the body of a violin)
resonator -
any system that resonates
system instrumentality that combines interrelated interacting artifacts designed to work as a coherent entity; "he bought a new stereo system"; "the system consists of a motor and a small computer"
resonator -
an electrical circuit that combines capacitance and inductance in such a way that a periodic electric oscillation will reach maximum amplitude
resonator -
A type of musical instrument, especially a guitar, that uses spun metal resonator cones to enhance the sound.
Wikipedia
A resonator is a device or system that exhibits resonance or resonant behavior, that is, it naturally oscillates at some frequencies, called its resonant frequencies, with greater amplitude than at others. The oscillations in a resonator can be either electromagnetic or mechanical. Resonators are used to either generate waves of specific frequencies or to select specific frequencies from a signal.