resonator

noun

something which resonates

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Wiktionary

noun

Etymology: Etymology tree Proto-Italic *wre- Latin re- Proto-Indo-European *swenh₂- Proto-Indo-European *-yeti Proto-Indo-European *-éyeti Proto-Italic *swonaō Latin sonō Latin resonōbor. English resonate English -or English resonator From resonate + -or.

Any object or system that resonates
A hollow cavity whose dimensions are selected so as to resonate at a specific frequency
A resonant electronic circuit
A type of musical instrument, especially a guitar, that uses spun metal resonator cones to enhance the sound.