Among the noisiest man-made activities in the seas, emitting very high acoustic energy are the underwater explosions of various objects and ship shock trials. Sound energy emitted by high explosives can be predicted or measured at sea. Sometimes, it can be convenient to apply empirical formulas and scaling laws to approximate the energy of underwater explosions. In addition, at some instances the determination of the spectral properties of the explosions is useful, i.e. when possible animal exposure to impulsive noise has to be evaluated. This paper presents an example of an application of freely available scaling laws and equations for prediction of noise levels of underwater explosions of historical ordnance in the shallow sea environments. Main findings of the study: An available scaling laws applied to model underwater explosion properties; spatial extent of explosion mapped; arising issues of modelling of underwater explosions in the shallow marine areas discussed.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.envpol.2019.06.049 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Estimation of the spatial variability of the New England Mud Patch geoacoustic properties using a distributed array of hydrophones and deep learninga).
J Acoust Soc Am
December 2024
Department of Applied Ocean Physics and Engineering, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA.
This article presents a spatial environmental inversion scheme using broadband impulse signals with deep learning (DL) to model a single spatially-varying sediment layer over a fixed basement. The method is applied to data from the Seabed Characterization Experiment 2022 (SBCEX22) in the New England Mud-Patch (NEMP). Signal Underwater Sound (SUS) explosive charges generated impulsive signals recorded by a distributed array of bottom-moored hydrophones.
View Article and Find Full Text PDFProtocol for developing an explosion-propeller hybrid driving underwater robot for AI-based concrete overhaul in real marine environments.
STAR Protoc
December 2024
Ocean College, Zhejiang University, Zhoushan, Zhejiang 316021, China; Hainan Institute of Zhejiang University, Sanya, Hainan 572025, China; Engineering Research Center of Oceanic Sensing Technology and Equipment, Zhejiang University, Ministry of Education, Zhoushan, Zhejiang 316021, China. Electronic address:
Article Synopsis
- Developed an underwater robot that uses a hybrid explosion-propeller system for efficient operation in marine environments.
- Implemented an AI technique to detect concrete damage, detailing methods for creating a detection dataset and optimizing the algorithm.
- Included comprehensive procedures for robot assembly, preparation of tools, and real-world testing in marine settings, with references for further details.
Current species protection does not serve its porpoise-Knowledge gaps on the impact of pressures on the Critically Endangered Baltic Proper harbour porpoise population, and future recommendations for its protection.
Ecol Evol
September 2024
Department of Fisheries Ministry of Agriculture and Rural Development Warsaw Poland.
Article Synopsis
- The Baltic Proper harbour porpoise population, listed as Critically Endangered since 2008, remains at risk despite existing conservation policies aimed at its protection.
- Urgent management actions are necessary due to high anthropogenic mortality, contamination, reduced prey availability, and increased underwater noise, which threaten the population's survival.
- Recommendations include minimizing bycatch and underwater explosions, regulating contaminants, ensuring sustainable fisheries management, and expanding stranding networks to gather more data on the population's health and genetics.
Shock wave generated by composite energetic material driven by electrical non-penetrating wire explosion plasma.
Rev Sci Instrum
September 2024
State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, People's Republic of China.
Underwater shock wave technology can realize dynamic rock fracture, which is helpful to increase oil and gas reservoir permeability. It can realize the efficient exploitation of medium and low maturity oil and gas resources. In practical application, the shock wave parameters require not only high intensity but also safety and controllability.
View Article and Find Full Text PDFEnhancing High-Alloy Steel Cutting with Abrasive Water Injection Jet (AWIJ) Technology: An Approach Using the Response Surface Methodology (RSM).
Materials (Basel)
August 2024
Inspire AG (ETH Zurich), CH-8005 Zurich, Switzerland.
The common machining technologies for difficult-to-machine materials do not remarkably ensure acceptable efficiency and precision in bulk materials cutting. High-energy abrasive water injection jet (AWIJ) treatment can cut diverse materials, even multi-layer composites characterized by divergent properties, accurately cutting complex profiles and carrying them out in special circumstances, such as underwater locations or explosion hazard areas. This work reports research on the AWIJ machining quality performance of X22CrMoV12-1 high-alloy steel.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!