中文摘要：

结合噪声源定位方法和阵列信号处理技术，设计了一种能提取输电线噪声的传声器阵列，利用该阵列采集了复杂声场条件下的输电线噪声数据，并分析了噪声源的频谱特性和空间分布特征，验证了宽带频域近场聚焦波束形成方法对输电线噪声源定位的有效性。通过实验观测发现，西安上苑330kV高压输电线噪声源主要为高频随机噪声，其频率集中在2-10kHz范围内，信号能量分布较均匀；在频段为2-8kHz范围内的噪声信号，增大信号处理的带宽可以提高声源定位的精度，但如果信号处理的带宽超过了输电线的主频范围，定位性能会变差。

英文摘要：

Combining with algorithms of noise localization and array signal processing, a microphone array which analyzes the noise of the power transmission line is designed. Noise of the power transmission line in complicated background is sam- pled with the designed array. The characteristics of the noise spectrum and spatial distribution are analyzed and the availabil- ity of using the broadband frequency domain focused beamforming to localize the noise source is verified. Through the experi- mental observation, it can be found that the accuracy of sound source localization increases as the bandwidth of the signal processing improves. While, the performance would degrade if the bandwidth exceed a certain limit.