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| 传声器阵列对高频弱声源的声成像识别方法 | |
| 引用本文： | 钱正莲, 杨亦春, 余立志, 滕鹏晓, 韩宝坤, 王昌田. 传声器阵列对高频弱声源的声成像识别方法[J]. 声学学报, 2015, 40(1): 90-96. DOI: 10.15949/j.cnki.0371-0025.2015.01.011 |
| 作者姓名： | 钱正莲 杨亦春 余立志 滕鹏晓 韩宝坤 王昌田 |
| 作者单位： | 1. 山东科技大学 机械电子工程学院 青岛 266510; |
| 基金项目： | 国家自然科学基金(11074278,11174320)资助 |
| 摘 要： | 研究了传声器阵列对高频弱声源的识别定位方法。该方法根据高频声源的指向性和阵列探测特性等特点,提出了利用信噪比加权方法提高有效阵元对声成像的贡献,根据信噪比的大小对每个阵元添加不同的权值,可以显著提高传声器阵列对高频弱声源的声像清晰度。仿真分析了阵元加权和不加权两种方法对阵列声成像结果的影响,以某型号笔记本电脑电路板噪声为对象进行的实验表明,在阵列测量中充分利用有效阵元信号可以实现对声压级低达10~20dB的微弱噪声源的精确测量。 |
| 关 键 词： | 传声器阵列 高频弱声源 识别定位方法 信噪比加权方法 |
| 收稿时间： | 2012-08-14 |
| 修稿时间： | 2013-01-09 |
Identification and location of acoustic imaging on high frequency weak noise sources with a microphone array |
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| QIAN Zhenglian, YANG Yichun, YU Lizhi, TENG Pengxiao, HAN Baokun, WANG Changtian. Identification and location of acoustic imaging on high frequency weak noise sources with a microphone array[J]. ACTA ACUSTICA, 2015, 40(1): 90-96. DOI: 10.15949/j.cnki.0371-0025.2015.01.011 | |
| Authors: | QIAN Zhenglian YANG Yichun YU Lizhi TENG Pengxiao HAN Baokun WANG Changtian |
| Affiliation: | 1. College of Mechanical and Electronic Engineering, Shandong University of Science and Technology Qingdao 266590;2. Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Chinese Academy of Science Beijing 100190;3. College of Information and Engineering, Xiangtan University Xiangtan 411105 |
| Abstract: | A kind of method of identification and location for high frequency weak noise sources with sensor array was founded.The contribution of the effective member sensors to the acoustic image has been improved based on the characteristic of high frequency sources' directivity and detection performance of microphone array with SNR weighting method, Acoustic image is developed more clearly by means of adding different weights to different sensors in signal processing according to SNR differences. Simulation of sensors with weight and no-weight to acoustic image sources has been analyzed respectively, Test of circuit noise of a certain type of notebook showed that the microphone array can position very weak sources (Sound Pressure Level (SPL) 10~20 dB) accurately when all effective member sensors are used to perform the sound image. |
| Keywords: | microphone array high frequency weak noise source method of identification and location SNR weighting method |
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