lect_42 - Ocean Acoustic Theory Acoustic Wave Equation...

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COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 4 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 – Image Method – Wavenumber Integral – Normal Modes • Pekeris Waveguide
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COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 4 Horizontally stratified environment
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COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 4 Superposition Principle Source contribution: Homogeneous Solution:
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COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 4 Superposition Principle Source contribution: Homogeneous Solution:
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COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 4 Radiating Waves Evanescent Waves
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COMPUTATIONAL OCEAN ACOUSTICS 13.853 Lecture 4 Radiating Waves Evanescent Waves 50 40 30 20 10 0 0.2 0.4 0.6 0.8 1.0 Horizontal wavenumber (m -1 ) Magnitude F = 150 Hz Magnitude of the depth-dependent Green’s function for point source in an infinite medium. Solid curve: z – z s = λ /10; dashed curve: z – z s = 2 λ .
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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_42 - Ocean Acoustic Theory Acoustic Wave Equation...

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