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A LOW-COST ENVIRONMENTAL ACOUSTIC PLATFORM FOR EVALUATING HUMAN EXPLOITATION OF TROPICAL FORESTS

用于评估人类对热带森林开发的低成本环境声学平台

基本信息

批准号：
1658469
负责人：
金额：
--
依托单位：
University of Southampton
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2015
资助国家：
英国
起止时间：
2015 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-1658469
关键词：
LOW COST ENVIRONMENTAL ACOUSTIC PLATFORM

项目摘要

The tropical forests of Central America are increasingly under environmental pressure from unchartered threats. In these areas it is typical to monitor disturbances such as clear-cutting and forest fires with satellite imaging techniques. However, concealed by the forests canopy other threats such as illegal poaching and selective logging can proceed undiscovered. Recent developments in micro-controller and surface mount microphone technology means that continuous acoustic sensing at low-cost is now a possible solution. Consequently, we propose an acoustic data acquisition system to effectively monitor anthropogenic activities that aerial photography cannot. Two preliminary case studies are discussed emphasizing the feasibility of the systems hardware. The first study compares two types of surface-mount microphone, looking at their sensitivity to gunshot and chainsaw noise over varying distances. The second considers the advantages and limitations of low-cost microprocessor based hardware. Here, we trial a custom designed acoustic logger over a three month deployment to detect and record a local rare species of insect. Our findings show the hardware to be an efficient real time detection tool with power consumption suitable for long duration recordings. The microphones sensitivity also proves sufficient for detecting gunshots at distances of at least half a kilometer.

中美洲的热带森林正日益受到未知威胁的环境压力。在这些地区，典型的做法是利用卫星成像技术监测毁林和森林火灾等扰动。然而，隐藏在森林树冠下的其他威胁，如非法偷猎和选择性采伐，可能会在未被发现的情况下进行。微控制器和表面贴装麦克风技术的最新发展意味着低成本的连续声学传感现在是一种可能的解决方案。因此，我们提出了一种声学数据采集系统来有效地监测航空摄影无法做到的人为活动。讨论了两个初步的案例，强调了系统硬件的可行性。第一项研究比较了两种类型的表面贴装麦克风，观察它们在不同距离上对枪击和电锯噪音的敏感性。第二部分考虑了基于低成本微处理器的硬件的优点和局限性。在这里，我们在三个月的部署中试用了定制的声学记录仪，以检测和记录当地的稀有昆虫物种。我们的研究结果表明，硬件是一种高效的实时检测工具，功耗适合长时间记录。麦克风的灵敏度也被证明足以在至少半公里的距离上探测到枪声。