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

拟议研究的目标是开发一种移动定向水听器阵列，可在 沿海海洋水动力条件和海底类型的范围，并结合无线数据 用于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。移动设备 该系统将设计用于在水深达100米的地方进行快速部署和恢复，并具有 水听器放置在深水处，以最大限度地减少表面波的流动噪音。设计活动将包括 高能环境中系泊要求的模拟和对海流的强迫分析 仪器仪表。安装在水面浮标中并连接到水听器的无线电链路模块将发射 将处理后的数据发送到接收器，从而能够实时采集噪声信号。试验将在#年进行 新斯科舍省的大通道，芬迪湾的一条高流量潮汐水道。这一地理位置提供了多样化的 噪音环境，包括每半小时轮渡一次、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米/S)，以及破表面重力 海浪。水下环境噪声测量也将在活动人员的直接附近进行 海上建筑工地。 本研究的意义在于增强了机会测量和评估的能力 海洋环境中的环境噪声。目标应用包括：(1)作为以下因素的函数的噪声水平 与固定污染源的距离，例如海洋建筑活动(例如打桩)和河内潮汐 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这些限制 通过独特的系泊和数据传输设计实现岸上电缆或自主水听器系泊， 能够改进各种沿海和淡水海洋噪音数据的获取和报告 地点。

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.