摘要
综合考虑声音信号的时延和多普勒效应,设计出一种七元非对称麦克风阵列声源定位装置。将该装置应用于对静止声源、不同运动状态的声源的定位,探究了装置对不同声频、三维空间不同位置以及不同运动状态的声源的定位效果。对于静止声源,装置的定位精度约为±2cm,定位范围约为0~70cm。对于运动声源,装置可以得到不同时刻声源的位置和速度,进行拟合后得到的运动参数误差约为3%。以声源定位测量重力加速度为例讨论了声源定位在实验上的扩展。本工作有助于帮助学生理解声学的相关知识,具有很大的实际应用与实验教学价值。
Considering the time delay and Doppler effect of the sound signal,a seven-element asymmetric microphone array sound source location device is designed.The device is applied to the location of both sound sources and sound sources in different motion states,to investigate the location capability of the device for sound sources in different sound frequencies,different positions in three-dimensional space,and different motion states.The location accuracy of the device is about±2cm,and the location range is about 0~70cm for static sound sources.For the moving sound sources,the device can obtain the position and velocity of the sound source at different times,and the errors of fitted motion parameters are about 3%.Taking the measurement of gravity acceleration by sound source localization as an example,the extension of sound source localization in experiment is discussed.This work is helpful for students to understand the knowledge of acoustics,and also has great value in practical application and experimental teaching.
作者
刘权毅
闫思哲
刘博一
陈铭军
胡从霖
惠王伟
李文华
LIU Quanyi;YAN Sizhe;LIU Boyi;CHEN Minjun;HU Conglin;HUI Wangwei;LI Wenhua(School of Physics,Nankai University,Tianjin 300071;National Demonstration Center for Experimental Physics Education,Nankai University,Tianjin 300071)
出处
《物理与工程》
2023年第6期60-69,共10页
Physics and Engineering
基金
2020高等学校教学研究项目(DJZW202010hb)
南开大学“四新”专业课程改革项目(21NKSYSX02)
2022年南开大学实验课程改革项目开放实验类(22NKSYKF02)。
关键词
声源定位
时延法
多普勒效应
非对称麦克风阵列
sound source location
time delays method
Doppler effect
asymmetric microphone array
