resonator
 US /ˈrez.ən.eɪ.t̬ɚ/
 UK /ˈrez.ən.eɪ.t̬ɚ/

1. 
resonator
a device or system that exhibits resonance or resonant effects, especially as an electrical circuit or a cavity
:
• 
The guitar's resonator amplifies the sound.
Resonator gitar memperkuat suara.
• 
Microwave ovens use a cavity resonator.
Oven microwave menggunakan resonator rongga.