NA60011: Marine Acoustics
| NA60011 | |||||||||||||||||||||||||
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| Course name | Marine Acoustics | ||||||||||||||||||||||||
| Offered by | Ocean Engineering & Naval Architecture | ||||||||||||||||||||||||
| Credits | 3 | ||||||||||||||||||||||||
| L-T-P | 3-0-0 | ||||||||||||||||||||||||
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| Semester | Autumn | ||||||||||||||||||||||||
Syllabus
Syllabus mentioned in ERP
Theory and applications of Ocean Acoustics â physical and biological characteristics of the sea, ocean stratification, sound speed and ray refraction, remote sensing by scatter, passive acoustics, variability of oceans and its effect on acoustics, sound scattering at ocean surface, sound scattering by air bubbles, ocean bottom effects, ambient noise, application of underwater acoustics in practical problems, acoustic tomography; Ray theory of sound field in the Ocean âRefraction of sound rays, horizontal distance traced by ray; sound intensity, focusing factors and caustics, three dimensional refraction; Plane waves â reflection from surface and bottom, reflection and transmission coefficients at interface, wave reflection at liquid layered bottom, reflection from homogeneous layers, reflection from arbitrary number of layers, reflection from continuously layered bottom; Sound propagation in shallow water âNormal modes in a two layered liquid, average decay law, layer with negative refraction, convergence zones, Density dependence of sound propagation in oceans - SOFAR channel estimation â practical problem to estimate optimum SOFAR channel depth in oceans; SONAR systems â generic SONAR, echo identification rules, SONAR equations; Scattering of Sound â role of gas bubbles in sound scattering, sound scattering by single ideal bubble, scattering and absorption of sound by real bubble, dispersion of sound velocity; reverberation, surface and volume reverberation.