Enhanced acoustic wave localization effect using coupled sonic crystal resonators

Abstract

A coupled resonance structure of two sonic crystal resonators with different sizes is proposed to enhance the acoustic wave localization effect. Due to acoustic resonance coupling between sonic crystal resonators, the enhanced acoustic wave localization is observed in the coupled resonance structure, and the cavity pressure is much larger than that in each individual sonic crystal resonator. The experimental results show that the proposed coupled structure exhibits 2.1–3.3 times larger maximum pressure magnification than each individual sonic crystal resonator. This proposed structure can be further used to improve acoustic energy harvesting, acoustic sensing, and sound concentration.