Ocean Ambient Noise Field Modelling And The Optimized Noise Term
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Ocean Ambient Noise Field Modelling And The Optimized Noise Term
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Author : Nikita Kovaloff
language : en
Publisher:
Release Date : 2023
Ocean Ambient Noise Field Modelling And The Optimized Noise Term written by Nikita Kovaloff and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023 with categories.
The objective of this thesis is to determine the frequency and wind-wave forcing dependent effective sea surface noise source level per unit area (NSL/A) extracted from the hourly minimum sound power levels of six month-long acoustic recordings. The effect of the propagation environment was accounted for using Bellhop. The simulated environment was configured using climatological sound velocity profiles to capture seasonal effects. Bottom sound speed estimates were made from seabed sediment maps. Hourly meteorological data were extracted from ERA5 providing relevant wind and wave parameters from which noise levels may be predicted. A weighted composite model consisting of neutral wind and significant wave height leveraging the two-term exponential regression function maximized model R2. Hourly minimum sound power level derived model-data comparisons using horizontal wind speed magnitude 10 m above sea level expressed a decrease in NSL/A estimates versus Kewley (1990) by 10 to 15 dB from 1 to 3 kHz.
Ocean Ambient Noise
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Author : William M. Carey
language : en
Publisher: Springer Science & Business Media
Release Date : 2011-03-23
Ocean Ambient Noise written by William M. Carey and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-03-23 with Science categories.
This monograph develops the theory of noise mechanisms and measurements, and describes general noise characteristics and computational methods. The vast ambient noise literature is concisely summarized using theory combined with key representative results. The air sea boundary interaction zone is described in terms of nondimensional variables requisite for future experiments. Noise field coherency, rare directional measurements, and unique basin scale computations and methods are presented. The use of satellite measurements in these basin scale models is demonstrated. A series of appendices provides in-depth mathematical treatments which will be of interest to graduate students and active researchers.
Ocean Observation Based On Underwater Acoustic Technology Volume Ii
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Author : Xuebo Zhang
language : en
Publisher: Frontiers Media SA
Release Date : 2024-12-02
Ocean Observation Based On Underwater Acoustic Technology Volume Ii written by Xuebo Zhang and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-12-02 with Science categories.
Since the sound wave is the only information carrier that can propagate long distances in the ocean, underwater acoustic technology based on sound waves undoubtedly plays an important role in ocean observation. The development of underwater acoustic technology requires the support of various underwater acoustic sensors and signal processing techniques. The function of an underwater acoustic sensor is to conduct the conversion between an underwater acoustic signal and an electric signal. Their performance directly determines the quality of underwater acoustic equipment. However, the harsh environment such as high pressure, high temperature, and highly corrosive fluids, as well as different requirements such as low frequency, broad bandwidth, high power, and deep water, often affect the physical properties of materials and structural performance of transducers, which deteriorates the transducer performance. Due to the lack of comprehensive research on key techniques including material physical properties and interfacial bond properties, the reliability of structural components is often seriously affected by environmental conditions, which may lead to major performance degradation or even failure with the device performance. Therefore, it is challenging for the transducer design to balance the acoustic performance and the device's stability.
Marine Mammals And Noise
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Author : W. John Richardson
language : en
Publisher: Academic Press
Release Date : 2013-10-22
Marine Mammals And Noise written by W. John Richardson and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-22 with Science categories.
Many marine mammals communicate by emitting sounds that pass through water. Such sounds can be received across great distances and can influence the behavior of these undersea creatures. In the past few decades, the oceans have become increasingly noisy, as underwater sounds from propellers, sonars, and other human activities make it difficult for marine mammals to communicate. This book discusses, among many other topics, just how well marine mammals hear, how noisy the oceans have become, and what effects these new sounds have on marine mammals. The baseline of ambient noise, the sounds produced by machines and mammals, the sensitivity of marine mammal hearing, and the reactions of marine mammals are also examined. An essential addition to any marine biologist's library, Marine Mammals and Noise will be especially appealing to marine mammalogists, researchers, policy makers and regulators, and marine biologists and oceanographers using sound in their research.
Underwater Acoustic Modeling And Simulation
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Author : Paul C. Etter
language : en
Publisher: CRC Press
Release Date : 2018-04-06
Underwater Acoustic Modeling And Simulation written by Paul C. Etter and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-04-06 with Technology & Engineering categories.
This newest edition adds new material to all chapters, especially in mathematical propagation models and special applications and inverse techniques. It has updated environmental-acoustic data in companion tables and core summary tables with the latest underwater acoustic propagation, noise, reverberation, and sonar performance models. Additionally
Fisheries Acoustics
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Author : Gaurav Shekhar
language : en
Publisher: Educohack Press
Release Date : 2025-02-20
Fisheries Acoustics written by Gaurav Shekhar and has been published by Educohack Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025-02-20 with Science categories.
"Fisheries Acoustics: Understanding Aquatic Environments" takes you on a captivating journey into the hidden world beneath the waves. This comprehensive guide helps readers appreciate the intricate ecosystems thriving in the ocean's depths. We offer a unique perspective on the wonders of marine life. From vibrant coral reefs to mysterious deep-sea trenches, each chapter explores different underwater ecosystems, revealing the diversity of life forms and the interconnectedness of marine environments. Starting with the fundamental principles of marine life, we provide essential background knowledge for understanding the complex interactions that shape underwater ecosystems. Readers are taken on a virtual dive, exploring various underwater habitats and fascinating creatures. Stunning photography and detailed illustrations bring the underwater world to life, capturing the beauty and diversity of marine life. The book explains the crucial role of ocean life in maintaining Earth's biodiversity, regulating climate patterns, and providing valuable resources. Emphasizing conservation efforts, we highlight the importance of protecting fragile ecosystems from threats like pollution and overfishing. We also explore technological advancements revolutionizing our ability to study ocean depths. Whether you're a marine biologist or an ocean enthusiast, "Fisheries Acoustics: Understanding Aquatic Environments" offers a wealth of knowledge and inspiration.
Acquisition And Processing Of Marine Seismic Data
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Author : Derman Dondurur
language : en
Publisher: Elsevier
Release Date : 2018-03-09
Acquisition And Processing Of Marine Seismic Data written by Derman Dondurur and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-03-09 with Science categories.
Acquisition and Processing of Marine Seismic Data demonstrates the main principles, required equipment, and suitable selection of parameters in 2D/3D marine seismic data acquisition, as well as theoretical principles of 2D marine seismic data processing and their practical implications. Featuring detailed datasets and examples, the book helps to relate theoretical background to real seismic data. This reference also contains important QC analysis methods and results both for data acquisition and marine seismic data processing. Acquisition and Processing of Marine Seismic Data is a valuable tool for researchers and students in geophysics, marine seismics, and seismic data, as well as for oil and gas exploration. - Contains simple step-by-step diagrams of the methodology used in the processing of seismic data to demonstrate the theory behind the applications - Combines theory and practice, including extensive noise, QC, and velocity analyses, as well as examples for beginners in the seismic operations market - Includes simple illustrations to provide to the audience an easy understanding of the theoretical background - Contains enhanced field data examples and applications
Underwater Acoustic Modeling And Simulation Fifth Edition
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Author : Paul C. Etter
language : en
Publisher: CRC Press
Release Date : 2018-03-15
Underwater Acoustic Modeling And Simulation Fifth Edition written by Paul C. Etter and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-03-15 with Technology & Engineering categories.
This newest edition adds new material to all chapters, especially in mathematical propagation models and special applications and inverse techniques. It has updated environmental-acoustic data in companion tables and core summary tables with the latest underwater acoustic propagation, noise, reverberation, and sonar performance models. Additionally, the text discusses new applications including underwater acoustic networks and channel models, marine-hydrokinetic energy devices, and simulation of anthropogenic sound sources. It further includes instructive case studies to demonstrate applications in sonar simulation.
The Journal Of The Acoustical Society Of America
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Author : Acoustical Society of America
language : en
Publisher:
Release Date : 2007
The Journal Of The Acoustical Society Of America written by Acoustical Society of America and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Acoustical engineering categories.
Underwater Acoustic Modeling And Simulation Fourth Edition
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Author : Paul C. Etter
language : en
Publisher: CRC Press
Release Date : 2013-02-21
Underwater Acoustic Modeling And Simulation Fourth Edition written by Paul C. Etter and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-02-21 with Technology & Engineering categories.
Underwater Acoustic Modeling and Simulation, Fourth Edition continues to provide the most authoritative overview of currently available propagation, noise, reverberation, and sonar-performance models. This fourth edition of a bestseller discusses the fundamental processes involved in simulating the performance of underwater acoustic systems and emphasizes the importance of applying the proper modeling resources to simulate the behavior of sound in virtual ocean environments. New to the Fourth Edition Extensive new material that addresses recent advances in inverse techniques and marine-mammal protection Problem sets in each chapter Updated and expanded inventories of available models Designed for readers with an understanding of underwater acoustics but who are unfamiliar with the various aspects of modeling, the book includes sufficient mathematical derivations to demonstrate model formulations and provides guidelines for selecting and using the models. Examples of each type of model illustrate model formulations, model assumptions, and algorithm efficiency. Simulation case studies are also included to demonstrate practical applications. Providing a thorough source of information on modeling resources, this book examines the translation of our physical understanding of sound in the sea into mathematical models that simulate acoustic propagation, noise, and reverberation in the ocean. The text shows how these models are used to predict and diagnose the performance of complex sonar systems operating in the undersea environment.