Answer: resonator
AnswerCrossword Clue
RESONATORDevice for amplifying sound.
RESONATORPiano soundboard, e.g.
resonatorA device that displays electrical resonance, esp. one used for the detection of radio waves
resonatora resonating body or device for increasing sound
resonatorA musical or scientific instrument responding to a single sound or note, used for detecting it when it occurs in combination with other sounds
resonatorAn apparatus that increases the resonance of a sound, esp. a hollow part of a musical instrument
resonatorA hollow enclosure with conducting walls capable of containing electromagnetic fields having particular frequencies of oscillation and exchanging electrical energy with them, used to detect or amplify microwaves