Wireless, real-time monitoring of ocean noise via a nimble shallow-water moored hydrophone array

通过灵活的浅水系泊水听器阵列无线实时监测海洋噪声

• 批准号: 490820-2015
• 负责人: Hay, Alex
• 金额: $ 1.76万
• 依托单位: Dalhousie University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=586639
• 关键词: Wireless; real; time; monitoring; ocean

The objective of the proposed research is to develop a mobile directional hydrophone array, deployable in a range of hydrodynamic conditions and seafloor types in the coastal ocean, and incorporating wireless data transmission for real-time reporting sound pressure levels. The approach will be based on the 5-hydrophone instrument developed by Turbulent Research. The mobile system will be designed for rapid deployment and recovery in water depths of up to 100 m, with the hydrophones emplaced at depth to minimize flow noise from surface waves. Design activities will include modelling of mooring requirements in high energy environments and analyses of current forcing on the instrumentation. A radio link module installed in a surface buoy and cabled to the hydrophone will transmit processed data to a receiver, enabling real time acquisition of the noise signal. Trials will be conducted in Grand Passage, Nova Scotia, a high-flow tidal channel in the Bay of Fundy. This location provides a diverse noise environment, including half-hourly ferry crossings, other vessel traffic, marine mammals (harbour porpoise, seals, and the occasional whale), high current speeds (up to 3 m/s), and breaking surface gravity waves. Underwater ambient noise measurements will also be made in the immediate vicinity of an active marine construction site. The significance of this research is the enhanced capability for opportunistic measurement and evaluation of ambient noise in the marine environment. Targeted applications include: (1) noise levels as a function of distance from stationary sources such as marine construction activities (e.g. pile driving) and in-stream tidal turbines; (2) marine mammal detection and behavioural studies. This research directly addresses the limitations of shore-cabled or autonomous hydrophone moorings through a unique mooring and data transmission design, enabling improved acquisition and reporting of ocean noise data in a wide range of coastal and freshwater locales.

提出的研究的目标是开发一种移动的定向水听器阵列，部署在一个 一系列的水动力条件和海底类型在沿海海洋，并纳入无线数据 实时报告声压级的传输。 该方法将基于湍流研究开发的5水听器仪器。移动的 该系统将设计用于水深达100米的快速部署和回收， 水下听音器安放在水深处，以尽量减少来自表面波的流动噪音。设计活动将包括 高能量环境中系泊要求的建模和对 仪器仪表无线电连接模块安装在水面浮标上，并通过电缆连接到水听器， 将处理后的数据发送到接收器，使得能够对噪声信号进行真实的实时采集。审判将在 大通道，新斯科舍省，芬迪湾的一个高流量潮汐通道。这个地方提供了一个多样化的 噪音环境，包括每半小时一班的渡轮、其他船只交通、海洋哺乳动物（海港 海豚、海豹和偶尔的鲸鱼）、高流速（高达3 m/s）和破水面重力 波水下环境噪声测量也将在一个活跃的附近进行 海上建筑工地。 该研究的意义在于增强了机会主义测量和评估的能力， 海洋环境中的环境噪声。目标应用包括：（1）噪声水平作为 与海上建筑活动（例如打桩）和河流潮汐等固定源的距离 涡轮机;（2）海洋哺乳动物检测和行为研究。这项研究直接解决了 通过独特的系泊和数据传输设计， 能够更好地获取和报告广泛的沿海和淡水海洋噪音数据 地点