Resonator
Pronunciation : Res"o*na`tor (-n`tr)
Part of Speech : n.
Definition : Defn: 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.
(Acoustics)
Source : Webster's Unabridged Dictionary, 1913