Note on the validity of using plane‐wave type relations to characterize Alberich anechoic coatings
Note on the validity of using plane‐wave type relations to characterize Alberich anechoic coatings
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DOI：
10.1121/1.404373
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发表时间：
1992-11
影响因子：
2.4
通讯作者：
A. Hladky-Hennion;J. Decarpigny
中科院分区：
文献类型：
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作者：
A. Hladky-Hennion;J. Decarpigny
通过使用简单的平面波类型关系测量由这种材料制成的面板的反射和透射系数，可以确定由适当设计的材料涂覆刚性平面结构引起的回声降低效率。然而，在Alberich消声涂层的情况下，由于周期性夹杂物的存在，这种关系的有效性是值得怀疑的。使用先前描述的有限元模型[A. C. Hladky-Hennion和J.N. Decarpigny，J. Acoust.美国社会90，3356-3367（1991）]，本文表明，相应的差异是次要的，特别是如果物质损失很高。
The efficiency of echo reduction due to the coating of a rigid plane structure by a properly designed material can be determined via the measurement of the reflection and transmission coefficients of a panel made up with this material using a simple, plane‐wave type relation. However, the validity of this relation is questionable in the case of Alberich anechoic coatings, due to the presence of the periodic inclusions. Using a previously described finite element model [A. C. Hladky‐Hennion and J. N. Decarpigny, J. Acoust. Soc. Am. 90, 3356–3367 (1991)], this paper shows that the corresponding discrepancies are of minor importance, especially if the material losses are high.