resonators

resonator

[rez-uh-ney-ter]
noun
1.
anything that resonates.
2.
an appliance for increasing sound by resonance.
3.
an instrument for detecting the presence of a particular frequency by means of resonance.
4.
Electronics.
a.
a hollow enclosure (cavity resonator) made of conducting material of such dimensions that electromagnetic radiation of a certain frequency will resonate.
b.
any circuit having this frequency characteristic.

Origin:
1865–70; resonate + -or2

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World English Dictionary
resonator (ˈrɛzəˌneɪtə)
 
n
any body or system that displays resonance, esp a tuned electrical circuit or a conducting cavity in which microwaves are generated by a resonant current

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