夏灿玮,
生物多样性与生态工程教育部重点实验室，北京师范大学生命科学学院，100875，北京
详细信息
通讯作者:夏灿玮（1984—），男，博士，副教授. 研究方向：鸟类行为. E-mail：xiacanwei@bnu.edu.cn
中图分类号:Q958; O429计量
文章访问数:90
HTML全文浏览量:49
PDF下载量:11
被引次数:0
出版历程
收稿日期:2021-03-21
网络出版日期:2021-07-23
刊出日期:2021-09-02
Accurate acoustic localization with two binaural recorders
Miao TIAN,Canwei XIA,
Ministry of Education Key Laboratory for Biodiversity and Ecological Engineering, College of Life Sciences, Beijing Normal University, 100875, Beijing, China
摘要
HTML全文
图
参考文献
相关文章
施引文献
资源附件
访问统计
摘要
摘要:利用声音定位野生动物，是一种低干扰、非损伤的监测方式，在动物研究中有广泛的应用．已有的动物声音定位装置需要对录音设备进行较大的改造，这提高了声音定位系统使用的成本．本文介绍的声音定位系统，基于2台户外常用的双声道录音设备，通过延长话筒到录音机的数据传输线，以实现对声源的定位，该定位系统在硬件改造上的花费极少．文中探讨了定位系统布设的方式：以同一台录音机的2个话筒的连线作为基线，当2条基线中点重合时有效监测范围达到最大．并基于定位误差的分析，提出了在实际应用中降低定位误差的建议：精确定位话筒位置、减小时间测量的误差、在能够获取录音的前提下尽可能延长基线长度、基线延长线避开监测动物频繁活动的区域、考虑环境温度对声速的影响等．采用该设备对播放的山麻雀（Passer cinnamomeus）和黄腹山雀（Pardaliparus venustulus）各50句鸣声进行定位，误差分别为（0.806±0.259）（均值±标准差）m和（0.781±0.293）m，满足实际应用的需求．
关键词:声音定位系统/
误差/
双曲线定位/
监测
Abstract:Animal vocalization can be used to locate animal position, which is a low interference and noninvasive method in animal monitoring．This method for triangulating the position of wild animals has been established previously, but always involve expensive and cumbersome hardware, therefore limiting the widespread use of the method．Here an acoustic location system based on two dual-track recorders was used．The optimal distribution of microphones was obtained．When the midpoint of two baselines connecting two microphones from the same recorder coincides, the monitoring range reaches a maximum．The accuracy of acoustic location was also considered．To improve precision of acoustic localization, one should include the influence of ambient temperature on sound velocity, improve localization precision of microphones, reduce measurement error of time difference, increase distance between microphones from the same recorder, and avoid extension of baselines passing through animal activity area．Judging from the playback calls from Passer cinnamomeus and Pardaliparus venustulus, location accuracy could reach (0.806 ± 0.259) m and (0.781 ± 0.293) m respectively．
Key words:acoustic location system/
error/
hyperbolic positioning/
monitor
