res·o·na·tor /-ˌetɚ/
 共鳴器,共鳴體,共振器


 Res·o·na·tor n.
 1. Acoustics Anything which resounds; specifically, a vessel in the form of a cylinder open at one end, or a hollow ball of brass with two apertures, so contrived as to greatly intensify a musical tone by its resonance. It is used for the study and analysis of complex sounds.
 2. Anything that resounds or resonates; specif.: (a) Teleg. An open box for containing a sounder and designed to concentrate and amplify the sound. (b) Elec. Any of various apparatus for exhibiting or utilizing the effects of resonance in connection with open circuits, as a device having an oscillating circuit which includes a helix of bare copper wire, a variable number of coils of which can be connected in circuit with a condenser and spark gap excited with an induction coil. It is used to create high-frequency electric brush discharges. (c) Wireless Teleg. The antenna system and other high-frequency circuits of a receiving apparatus.

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 resonator
      n 1: a hollow chamber whose dimensions allow the resonant
           oscillation of electromagnetic or acoustic waves [syn: {cavity
           resonator, resonating chamber]
      2: an electrical circuit that combines capacitance and
         inductance in such a way that a periodic electric
         oscillation will reach maximum amplitude [syn: {resonant
         circuit]
      3: any system that resonates