隨著科技的高度發展，生活品質的提升逐漸被重視，其中噪音控制為聲學工程中熱門的主題之一。
在本篇論文，我們設計了一組結構稱為Coupled membrane-ring structure, 即由雙層薄膜超穎材料附加環型質量形成封閉腔體，當聲音穿透此結構時，對結構所造成之振動，可以產生額外的穿透損失峰值以及比典型薄膜型聲學超穎材料有著更寬廣的聲音衰減頻寬。
我們不只對聲音穿透損失進行研究，其他如:有效質量密度、有效體積模數、以及結構之體積變化皆有深入探討，所有的數值結果是透過COMSOL Multiphysics 有限元素軟體進行模擬。

With highly developed technologies, the quality of life is gradually being emphasized. The noise control is one of the popular subjects in acoustic engineering field.
In this thesis, I design a novel acoustic structure called coupled membrane-ring mass structure. When the sound penetrates to the structure, it can produce an additional transmission loss peak and a wider attenuating range compared to typical membrane-type acoustic metamaterials.
I not only investigated transmission loss but also so some physical properties including effective mass density, effective bulk modulus and volume change. All the results are simulated by COMSOL Multiphysics finite element software package.

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