Determination of Plane-wave Reflection Coefficient in Underwater Acoustic Pulse Tube Using Two-dimensional Fourier Filtering

被引:0
作者
Kim, Wan-Gu
Kang, Hwi Suk
Yoon, Suk Wang
机构
来源
JOURNAL OF THE ACOUSTICAL SOCIETY OF KOREA | 2015年 / 34卷 / 06期
关键词
Pulse tube; Mode decomposition; Two-dimensional Fourier filtering; Plane-wave reflection coefficient;
D O I
10.7776/ASK.2015.34.6.493
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
Complex acoustic signals can be formed in a water-filled acoustic pulse tube under some exciting conditions. It makes difficult to measure plane-wave reflection coefficient with the pulse tube for low frequency bands. In this study, using COMSOL Multiphysics we show that the tube wall excitation generates complex acoustic field of nonplanar mode as well as planar one. From such field incident or reflected planar mode can be decomposed respectively with a modal decomposition method, two-dimensional Fourier filtering. It makes possible to more accurately determine the plane-wave reflection coefficient of acoustic specimen with time gating.
引用
收藏
页码:493 / 498
页数:6
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