Symmetry Properties of Acoustic Fields-Time Reversal Symmetry, Reciprocity Theorem.- Time Reversal Acoustics-Helmholtz Wave Equation has both Right Travelling and Left Travelling Wave Solutions.- Time Reversal gives rise to Superresolution.- Application to Nondestructive Evaluation - Experimental Setup and Case Studies.- Application to Medical Ultrasound Imaging.- Application to Underwater Acoustics.- Time Reversal Acoustics and Underwater Communication Technology.- Time Reversal Acoustics and Metamaterials.- Signal Processing.- Conclusions.
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