Principles of Underwater SoundThis revised third edition of the classic work on underwater sound provides a much-needed up-to-date summary of information and data on sonar and its applications. Unlike other books on the subject, it concentrates on the practical aspects of underwater sound, and offers engineers, operations analysts, naval officers, and other professionals in the field the immediately useful help they need for sonar problem solving. Its coverage is broad-ranging from the basic concepts of sound in the sea to making performance predictions in such applications as depth sounding, fish finding, and submarine detection. In addition, the book explores various areas of oceanography, detection theory, and other subjects where their processes and effects relate to underwater sound. |
Contents
one The Nature of Sonar | 1 |
two The Sonar Equations | 17 |
Directivity Index | 31 |
Copyright | |
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Common terms and phrases
absorption Acoust ambient noise amplitude array gain attenuation average background backscattering band bandwidth beam pattern bottom bubble calibration cavitation coefficient curves decibels deep sound channel density depth detection threshold distance echo effect elements energy explosive flow noise fluctuations function grazing angle hydrophone incident intensity isotropic kilohertz knots low frequencies measurements mixed layer multipath noise levels observed occur Ocean output parameters paths plane wave pressure projector propagation radiated noise ratio receiver reflection refraction resonant reverberation reverberation level ROC curves scattering strength sea surface self-noise shallow water shown in Fig signal signal-to-noise ratio sonar equations sonar projectors sound field sound velocity source level spectra spectrum level sphere spherical spreading submarine surface ships target strength temperature theory thermocline tion transducer transmission loss turbulent U.S. Nav underwater sound Urick velocity of sound vessel wavelength wind speed zone