lect_51 - Ocean Acoustic Theory Acoustic Wave Equation...

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Ocean Acoustic Theory • Acoustic Wave Equation • Integral Transforms • Helmholtz Equation • Source in Unbounded and Bounded Media • Propagation in Layered Media – Reflection and Transmission The Ideal Waveguide –Im ag e M e th od – Wavenumber Integral
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COMPUTATIONAL OCEAN ACOUSTICS Horizontally stratified environment 2 Lecture 5 13.853
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COMPUTATIONAL OCEAN ACOUSTICS Superposition Principle Source contribution: Homogeneous Solution: 3 Lecture 5 13.853
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13.853 Magnitude 50 F = 150 Hz 40 30 20 Evanescent Radiating Waves Waves 10 0 0.2 0.4 0.6 0.8 1.0 Horizontal wavenumber (m -1 ) Magnitude of the depth-dependent Green’s function for point source in an infinite medium. Solid curve: z – z = Ȝ /10; dashed curve: z – z s = 2 Ȝ . s 4 COMPUTATIONAL OCEAN ACOUSTICS Lecture 5
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Example: Hard Bottom – c 2 > c 1 Medium 1 Radiating Evanescent 0 k 2 k 1 Medium 2 Radiating Evanescent | R | < 1 | R | = 1
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This note was uploaded on 02/24/2012 for the course MECHANICAL 2.068 taught by Professor Henrikschmidt during the Spring '03 term at MIT.

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lect_51 - Ocean Acoustic Theory Acoustic Wave Equation...

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