关键词: 薄膜型超材料, 传递损失, 吸收峰值, 结构特征, 固有频率, Membrane-Type Acoustic Metamaterials, Transmission loss, Absorbed Peaks, Structural parameters, Eigenfrequencies

Abstract: According to FEA methods to calculate the transmission loss(TL) of membrane-type acoustic metamaterials. Morever, to explore the connection between frequencies of absorbed peaks(valleys) and eigenfrequencies of the whole system in the membrane-type acoustic metameterials. Then Apply the adjustments of micro structural parameters such as thickness, amplitude of center mass, prepress to learn the relationship of eigenfrequencies and absorbed peaks(valleys) of membrane-type acoustic metamaterials. The main conclusions are the corresponding frequencies of the absorption peaks (valleys) increase with the increase of the prestress of the membrane edge. The increase of membrane thickness leads to the decrease of the frequencies of transmission loss of the second peak and the third peak. And the amplitude of the central mass of the membrane only affect the frequencies of the first peaks (valleys).