摘要
针对目标声源在复杂声场环境下进行声场重建易受到其它声源干扰的问题,提出存在干扰源声场、散射声场及目标声源声场的混合声场环境下基于单面声场分离技术的目标声源声场分离及重建方法。首先,通过理论分析和公式推导,清除干扰源声场及散射声场的影响;然后,利用传递函数性质对声场分离及重建误差进行分析,并对计算公式中存在的奇异性问题予以消除,得到高分辨率的声场重建图像。数值仿真表明:利用常规的单面声场分离技术很难重建混合声场环境下目标声源的声场,而利用本文研究的声场分离及重建方法能够很好反映目标声源声场的实际情况,提高声场重建的精度。
Aiming at the problem that sound field reconstruction of target sound sources can be disturbed easily, a newseparation and reconstruction calculation method of the target sound sources based on single- side sound- field separationtechnique is presented under mixed sound field environment. This mixed sound field consists of interference source soundfield, scattering sound field and target sound field itself. First of all, the influence of the interference sound source field andthe scattering sound field is cleared by theoretical analysis and formula deduction. Then, the separation and reconstructionerrors of the sound field are analyzed by using transfer function property and the singularity in the calculation formula iseliminated. Finally, the high resolution sound field reconstruction image is obtained. Numerical simulation shows that theconventional single surface sound field separation technique can hardly reconstruct the sound field of the target sound sourceunder the mixed sound field environment. While the sound field of the target sound source can be reconstructed very well byusing the proposed separation and reconstruction method. And the accuracy of the sound field reconstruction is improved.
作者
张诗科
朱海潮
谢志敏
毛荣富
ZHANG Shi-ke;ZHU Hai-chao;XIE Zhi-min;MAO Rong-fu(Institute of Noise and Vibration, Naval University of Engineering, Wuhan 430033, China;National Key Laboratory on Ship Vibration and Noise, Wuhan 430033, China;Marine Environment Project Office of PLA, Beijing 100081, China)
出处
《噪声与振动控制》
CSCD
2016年第5期21-25,43,共6页
Noise and Vibration Control
关键词
声学
声全息
复杂声场
声场重建
误差分析
acoustics
acoustic holography
complex sound field
reconstruction of sound field
error analysis
