Abstract
A hard baffle plate is typically chosen for a high receiving sensitivity gain effect of a plate structure passive sensor with 1-3 piezoelectric composites. However, the vibration modes of the baffle plate affect the response characteristics of the 1-3 piezoelectric composite. Therefore, analyzing the vibration modes of the baffle plate and designing it to not affect the reception characteristics of the sensor is important. In this paper, the acoustic characteristics of the plate structure passive sensor with a 1-3 piezoelectric composite are presented through numerical simulation. The frequency response characteristics, according to the width, thickness, and length of the baffle, were analyzed. In addition, the response characteristics in the baffle vibration mode through changes in the arrangement of the hydrophone were analyzed. Through the analyzed results, presenting a model with improved acoustic response characteristics compared to the existing model was possible.
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