Sound generator for use in parametric array

摘要

A sound generator (130) includes a transducer (210) converting electric energy to mechanical energy, a mechanical amplifier (220) mechanically amplifying a vibration generated in a piezoelectric component (215) of the transducer (210), and a radiation plate (230) radiating a sound wave from a signal amplified by the mechanical amplifier, wherein the radiation plate includes a first step (310) having a height for compensating for a first resonance frequency and a second step (320) having a height for compensating for a second resonance frequency.