作者: Liang-Yu Wu , Lien-Wen Chen , Chia-Ming Liu
DOI: 10.1016/J.PHYSLETA.2009.01.051
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摘要: This study theoretically and experimentally investigates the acoustic pressure in cavity of a 2D sonic crystal. Such crystals are composed polymethyl methacrylate cylinders with square array embedded air background. The plane wave expansion method supercell calculation employed to calculate band structure obtain defect band. finite element is adopted simulate field crystal middle as function frequency. effects sizes filling fractions investigated, quality factor discussed. measured spectra pressures demonstrate that waves can be localized at resonant