声全息重构中的滤波窗优化设计  

Design of filtering window for acoustical holography

作　　者：莫登沅[1] 周其斗[2] 谷高全[3] 万海波[1] 

机构地区：[1]海军工程大学动力工程学院,武汉430033 [2]海军工程大学舰船工程系,武汉430033 [3]海军工程大学电子工程学院,武汉430033

出　　处：《海军工程大学学报》2017年第3期109-112,共4页Journal of Naval University of Engineering

摘　　要：声场逆向全息重构过程中,必须要对波数域噪声信号进行滤波处理,但常规滤波窗的效果不佳。为此,提出了空间域-波数域联合迭代滤波窗,并以一个简谐激励作用下四周为无限大障板的简支钢板为对象,通过仿真分析与对比验证所设计滤波窗的效果。结果表明:采用空间域-波数域联合迭代滤波,不仅能够有效消除重建面边缘的误差,抑制声场逆向重构误差,同时经过多次迭代,可以有效提高全息声场重构的精度,其效果优于常规滤波窗。The filtering window is used during the sound field reconstruction by the method of acous- tical holography. To improve the performance of the traditional filtering window, the iterative filte- ring window between the space domain and the wave-number domain is designed, and the effect of the filtering window is verified by using a synthetic Sound field created by a point-drive and simply sup- ported plate. The result shows that the sound pressure error on the edge of the reconstruction surface is slight and the effect of the designed filtering window is better than any traditional filtering window.

关 键 词：声全息 滤波窗 空间域 波数域 

分 类 号：O322[理学—一般力学与力学基础]