摘要
针对实际厂房、机舱等封闭环境中,声全息成像受混响因素严重干扰的问题,在等效源近场声全息方法的基础上,采用房间脉冲响应代替自由空间格林函数建立传递函数,并利用压缩感知技术处理求解时的欠定问题,得到相对准确的等效源强度,以消除混响的干扰,提高声源定位的效果。通过初步的数值模拟,验证了方法的准确性和有效性。结果表明,与原算法相比,改进方法在混响环境中的声源定位具有明显的优势。
In the closed environment of workshop and engine room,the acoustic holographic is seriously interfered by the reverberation factor.On the basis of the equivalent source near-field acoustic holography method,the room impulse response is used instead of the free space Green s function to establish the transfer function,and the underdetermined problem in the solution is processed by the compressed sensing technology to obtain the accurate equivalent source strength.Reverberation interference is suppressed and performance of sound source localization is improved.The accuracy and effectiveness of the method are verified by preliminary numerical simulation.The results show that compared with the original algorithm,the improved method has obvious advantages in sound source localization in reverberation environment.
作者
张宏宇
郭文勇
韩江桂
陈汉涛
夏菁
ZHANG Hong-yu;GUO Wen-yong;HAN Jiang-gui;CHEN Han-tao;XIA Jing(College of Power Engineering,Naval University of Engineering,Wuhan 430033,China)
出处
《科学技术与工程》
北大核心
2019年第33期113-118,共6页
Science Technology and Engineering
基金
国家部委科研项目(HJ20182C080261)资助
关键词
等效源法
近场声全息
室内混响
镜像源法
equivalent source method
near-field acoustic holography
indoor reverberation
image source method
