The acoustic performance of multilayered structures (MLSs) can be identified by experiments and calculation models that use commercially available software. This paper presents both an experimental method and data processing techniques that can be used for obtaining the acoustic characteristics of MLSs. During the described experiments, three types of MLSs with different structures are designed and manufactured, and their acoustic characteristics are investigated. In addition, the porosity, flow resistivity, tortuosity, and characteristic lengths of materials are determined experimentally and by using the calculation model. A calculation model for the acoustic performance of an MLS is proposed, and the calculated absorption coefficient and insertion loss derived are compared favorably with the results of experimental data, which validates the proposed models. The analytical methods and conclusions are useful in the design and the tuning of the MLSs.

多层结构（MLS）的声学性能可以通过使用商用软件的实验和计算模型来确定。本文介绍了可用于获得MLS声学特性的实验方法和数据处理技术。在上述实验过程中，设计并制造了三种结构不同的MLS，并研究了它们的声学特性。另外，通过实验和使用计算模型确定材料的孔隙率，流动阻力，曲折度和特征长度。提出了MLS声学性能的计算模型，并将计算得到的吸收系数和插入损耗与实验数据进行了比较，验证了所提出的模型。分析方法和结论对于MLS的设计和调整非常有用。