resonator

noun

1. Any object or system that resonates

2. A hollow cavity whose dimensions are selected so as to resonate at a specific frequency

3. A resonant electronic circuit

4. A type of musical instrument, especially a guitar, that uses spun metal resonator cones to enhance the sound.

5. A hollow chamber whose dimensions allow the resonant oscillation of electromagnetic or acoustic waves

   Similar: cavity resonator, resonating chamber

6. An electrical circuit that combines capacitance and inductance in such a way that a periodic electric oscillation will reach maximum amplitude

   Similar: resonant circuit