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估计不同尺寸的矩形样本的随机发生声吸收系数

Yujun Zhao¹, Ronald Sauro², Robert Alan Hallman³

¹School of Engineering, Royal Melbourne Institute of Technology University, Bundoora, Victoria 3083, Australia.

The Journal of the Acoustical Society of America

|November 13, 2023

概括

边缘效应会影响声音吸收系数 (SAC) 的测量. 本研究引入了一种可靠的经验方法,用于预测不同样本大小的SAC,使用材料特性,如厚度和密度.

科学领域:

声学声学在声学上
材料科学材料科学材料科学
实验物理实验物理学

背景情况:

声音吸收系数 (SAC) 的测量受材料特性和样品几何形状的影响.
边缘效应现象导致相同材料的不同样本大小的SAC变化.

研究的目的:

为了评估边缘效应对SAC测量的影响.
开发一种可靠的方法,通过不同的样本大小来预测材料的SAC.

主要方法:

来自多个实验室的实验SAC数据的分析.
建立基于测量数据和SAC与相对边长之间的线性关系的经验函数.
经验方法与托马森方法,两种几何方法和一种分析方法的比较.

主要成果:

建立了一个经验函数,根据材料厚度,密度和尺寸来预测SAC.
拟议的经验方法证明了从不同样本大小的测量中预测SAC的可靠性.
经验方法为复杂的几何和分析方法提供了切实可行的替代方案.

结论:

经验方法为预测声音吸收系数提供了一种可靠的方法,无论样本大小如何.
材料厚度,密度和尺寸是使用经验函数准确预测SAC的关键参数.
这项研究通过考虑几何影响来简化声学材料表征的过程.

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