#cavity_resonator__resonator__resonating_chamber  a hollow chamber whose dimensions allow the resonant oscillation of electromagnetic or acoustic waves
  supertype:  #chamber  a natural or artificial enclosed space
  subtype:  #soundbox  a resonating chamber in a musical instrument (as the body of a violin)
  subtype:  #soundboard__sounding_board  (music) resonator consisting of a thin board whose vibrations reinforce the sound of the instrument

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