Abstract
Time reversal is a method often used to focus sound to a desired location within a reverberant environment. Recent high-amplitude focusing experiments have shown that when multiple sources are used simultaneously to generate a focus, the level reached (200 dB) is higher than if each source were focused individually with the signals being superposed computationally. An investigation into the temporal and spatial features and harmonic content of each method is presented in order to work toward an understanding of the mechanisms driving the nonlinear increases observed when the sources are combined acoustically as opposed to being summed in post-processing.
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