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Presented in a clear and concise way as an introductory text and practical handbook, the book provides the basic physical phenomena governing underwater acoustical waves, propagation, reflection, target backscattering and noise. It covers the general features of sonar systems, transducers and arrays, signal processing and performance evaluation. It provides an overview of today's applications, presenting the working principles of the various systems. From the reviews: "Presented in a clear and concise way as an introductory text and practical handbook, the book provides the basic physical phenomena governing underwater acoustical waves, propagation, reflection, target backscattering and nois...
This volume contains the papers presented at the title conference. Speakers from 13 different countries were represented at the meeting. A broad range of topics in theoretical and applied wave propagation is covered.
Sidescan sonar is proving to be the preeminent technique for researchers and professionals seeking knowledge about the structure and behavior of the seafloor, but its data is often difficult to interpret due to the physics of acoustic remote sensing, and to the varied geological processes at play. This book covers the fundamentals of sidescan sonar, incorporates new understanding of marine structures, and explains how to interpret sidescan sonar imagery and bathymetry.
The nuclear-powered aircraft carrier is naval history’s most powerful and versatile warship. It is the reason the U.S. Navy is the predominant force at sea today. Throughout its illustrious history, the carrier has overcome serious flaws, including its expense, vulnerability, centralization of combat power, and its airwing’s short range. The U.S. Navy always accepted those flaws because the carrier was the best means of delivering firepower. Today’s technologies, however, provide key opportunities for the U.S. Navy to move beyond the limitations of a carrier-centric fleet by redesigning its force structure. Questioning the Carrier examines how the U.S. Navy can embrace the Age of the M...
In this landmark new work, the major authorities in the field from around the world present a wealth of research data, coverage of regulatory issues, and thinking about the effects of man-made noise on marine mammals, turtles, amphibians, fishes, and invertebrates. The various themes of the book were chosen to cover the wide range of basic and cutting edge information on this topic. They include the hearing abilities of aquatic animals; communication by means of underwater sound; the description of aquatic soundscapes; different sound sources and their characteristics; the effects of sound on behavior; and assessing, mitigating, and monitoring the effects of aquatic noise. Emphasis is on the cross-fertilization of ideas and findings across species and noise sources. With over 140 contributions from leading researchers, the sources of underwater sound and their effects are discussed in detail.
Sound is integral to how we experience the world, in the form of noise as well as music. But what is sound? What is the physical basis of pitch and harmony? And how are sound waves exploited in musical instruments? In this Very Short Introduction Mike Goldsmith looks at the science of sound and explores sound in different contexts, covering the audible and inaudible, sound underground and underwater, accoustic and electric, and hearing in humans and animals. He also considers the problem of sound out of place - noise and its reduction. ABOUT THE SERIES: The Very Short Introductions series from Oxford University Press contains hundreds of titles in almost every subject area. These pocket-sized books are the perfect way to get ahead in a new subject quickly. Our expert authors combine facts, analysis, perspective, new ideas, and enthusiasm to make interesting and challenging topics highly readable.
Les ondes sonores constituent le seul moyen d'investigation et de transmission à grande distance utilisable en pratique dans le milieu marin. Apparue au début du XXe siècle, l'acoustique sous-marine est devenue une des technologies essentielles utilisées pour l'exploration et l'exploitation des océans à des fins scientifiques, industrielles ou militaires. Elle peut prétendre jouer aujourd'hui dans l'océan le même rôle que les ondes radio et radar dans l'atmosphère et dans l'espace, et est largement employée dans les domaines de la navigation, de la pêche, de la défense, de l'océanographie et de l'ingénierie marine. Cet ouvrage présente de manière claire et synthétique les phénomènes physiques fondamentaux régissant les ondes acoustiques sous-marines, les principes de fonctionnement des systèmes sonar, et un panorama de leurs applications.
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The book is an edited collection of research articles covering the current state of sonar systems, the signal processing methods and their applications prepared by experts in the field. The first section is dedicated to the theory and applications of innovative synthetic aperture, interferometric, multistatic sonars and modeling and simulation. Special section in the book is dedicated to sonar signal processing methods covering: passive sonar array beamforming, direction of arrival estimation, signal detection and classification using DEMON and LOFAR principles, adaptive matched field signal processing. The image processing techniques include: image denoising, detection and classification of...