参考文献:
[1-2,8]Min Yang,Subwavelength total acoustic absorption with degenerate resonators.107.104104(2015)
[3]M. Yang, G.Ma, Z. Yang, and P. Sheng,“Coupled membranes with doubly negative mass density and bulk modulus,” Phys. Rev, Lett. 110,134301 (2013).
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