resonator
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
en-US/ˈɹɛzəˌneɪdɚ/
en-GB/ˈɹɛzəneɪtə/
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