麦克风阵列声源定位的实验设计与实现

基于麦克风阵列的声源定位技术,可以应用在智能交互、智能家电、视频会议、语音识别等领域。该文设计了一个使用麦克风阵列进行声源定位的综合型实验项目,并应用到本科生开放创新实验中。实验充分利用多个麦克风阵元间的空域和时域信息,采用时延估计算法对不同阵元波达时间延迟进行估计。通过构建阵元几何关系并利用阵元信号的时延,获得了在噪声环境下较好的声源定位效果。教学实践表明,该实验项目可以较好地拓展学生的信号处理能力,有利于对学生创新设计能力和解决复杂问题能力的培养。

Design and realization of experiment for sound source localization based on microphone array

Sound source localization technology based on microphone array can be applied in the fields of intelligent interaction, smart home appliances, video conferences and speech recognition, etc. A comprehensive experimental project by using a microphone array for sound source localization is designed and applied to undergraduate open innovation experiments. By making full use of the spatial and temporal information between multiple microphone array elements as well as the time delay estimation algorithm, the time delay of different array elements is estimated. By constructing the geometric relationship of the array elements and using the delay of the array element signal, a better sound source localization effect under noisy environment is obtained. The results show that this experiment can better expand students’ signal processing ability, which is conducive to the cultivation of students’ innovative design ability and their ability to solve complex problems.