论文部分内容阅读
Broadband acoustic transmission enhancement (ATE) is realized for a periodically structured stiff plate without any opening that is conventionally thought to be only capable of supporting narrowband ATE,by introducing locally resonant (LR) elements.This exotic phenomenon is interpreted by analyzing the vibration patte of the structure-induced LR modes,and is well modeled by a simple "spring-mass" system which reveals the contribution of the LR effect to the important broadband performance.Our findings should help to better understand the physical mechanism of ATE and may have potential impact on ultrasonic applications such as broadband acoustic filters or compact acoustic devices in subwavelength scale.