UNDERWATER SOUND DETECTING SYSTEMPURPOSE: To obtain a detecting system which has a wide sound pressure dynamic range in simple constitution by regulating a degree of amplification of an underwater sensor by means of a gain control signal.GOTO KOJI後藤 光二...
The sound produced due to release of tiny air bubbles during sea ice melting, along with excellent sound propagating properties of seawater, become a good mechanism for measuring the sea ice melting using passive acoustic technique. The acoustic sensing of glacier ice melting in the Arctic and ...
7.Realization of Remote Underwater Acoustics Parallel Computing System on Cross Platform远程跨平台水下声场并行计算系统的实现 8.Sensitivity Analysis of Underwater Sound Field with Laser Remote Sensing by Direct Detection直接光强检测方式分析激光遥测水下声场探测灵敏度 9.Scattering Field Analysis of the Unde...
Testing of UW directional hearing was conducted in the harbour of Kerteminde, water depth of 3 m (Fig 4aand 4b). The experimenter was positioned on the pontoon controlling the transmission of sound signals and the video system (Fig. 4a). A trial started when the test subject descended to ...
Stellwagen Bank National Marine Sanctuary is located in Massachusetts Bay off the densely populated northeast coast of the United States; subsequently, the marine inhabitants of the area are exposed to elevated levels of anthropogenic underwater sound, p
A still further embodiment of the invention includes means for measuring depth, means for detecting sound and means for selecting one of a plurality of options in response to the detected sound. Yet another embodiment of the invention includes means for measuring depth and means for capturing digit...
strength determined by the reflectivity of a target and defined by its shape, size and composition;𝑁𝐿NLis the noise level in the water column which may disturb the sonar’s sound waves;𝐷𝐼DIis the directivity index, which indicates the narrowness of the sound beam that the sonar ...
Fig. 1. Proposed system model for the RD-ASVTuw. The video camera records the video in H.264 format [9]. At the receiver, the cross-layer adaptivity selects the SVC structure and the MCS according to the required video quality and estimated CSI. Our Approach: At the receiver, the sch...
This system can eventually be extended to form an underwater sound monitoring system for reporting real-time 2D source locations. In addition, the procedures for underwater localization based on passive TRM and ray-theory-based model (BELLHOP) are depicted in detail, which is absent in the ...
Generally, as underwater wireless communication, there is a fish detector detecting underwater fishes, a depth sounder investigating the seabed and a shape of rocks, a sonar detecting a screw sound of a military ship such as a submarine, or an active sonar sending a microwave pulse such as ...