Investigation of the origin of acoustic Wood anomaly.
Investigation of the origin of acoustic Wood anomaly.
复制标题
声木异常起源的调查。
DOI：
10.1121/1.4926903
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
N. Declercq
中科院分区：
文献类型：
--
作者：
Jingfei Liu;N. Declercq
在从周期性波纹表面反射的宽带波的频谱中，较早观察到频谱异常并将其识别为声学伍德异常。通过实验研究和对现有理论的检验，对声伍德异常的物理起源进行了彻底的调查。通过对液-固、固-液、固-气三类界面实验结果的分析，对现有的声学Wood异常解释进行了回顾和评价。此外，观察到频谱尖端并将其识别为另一种类型的声学木材异常。这项研究基于时频分析，与早期仅考虑频谱的研究相比，对这种现象提供了更多的见解。
In the spectrum of a broadband wave reflected from a periodically corrugated surface, spectral anomalies have been observed earlier and identified as acoustic Wood anomalies. A thorough investigation of the physical origin of the acoustic Wood anomaly is made through an experimental investigation and an examination of the existing theories. The existing explanations of acoustic Wood anomaly are reviewed and evaluated based on the analysis of the experimental results obtained from three types of interfaces: liquid-solid, solid-liquid and solid-air interfaces. In addition, spectral tips are observed and identified as another type of acoustic Wood anomaly. The investigation is based on time-frequency analysis and offers much more insight into this phenomenon than earlier research where only the frequency spectrum was considered.