Test on estimating direction of helicopter with acoustic array

摘要：

The article tests the capability of estimation direction of close acoustic sources using a special microphone array, designs test plan. The data gathered in the test proves that the frequency of helicopter noise is strongly peaked around 200Hz. Comparing one value of time-delay that is estimated by cross-correlation between two original signals with another value of time-delay that is estimated by cross-correlation between the two signals after low pass filtering or wavelet filtering presents that two filtering methods above for improving time-delay estimation accuracy is limited, but enhanced robust of time-delay estimation. It is effective to estimate direction of sound source with the spatial acoustic array and the error of estimating direction is less than 1％ in certain region, so the theoretical research on the microphone array for localization of acoustic target is liable.

关键词： Passive Acoustic Localization Acoustic Array Time-delay Estimation Acoustic Target Helicopter

作者: Shuxue SUN Yanxin LV Xiaohui GU Yonghong GAO

作者单位: School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Chin School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Chin

会议类型: 国际会议

会议名称: 第七届国际测试技术研讨会

会议地点: 北京

会议语种:英文

在线出版日期: 2007-08-05（万方平台首次上网日期，不代表论文的发表时间）