Fast acoustic imaging with separable arrays. Masiero, B., S., Arroyo, C., S., B., Nascimento, V., H., & Ribeiro, F., P. In Proceedings of the 5th International Symposium on Solid Mechanics, 2015. abstract bibtex We compare acoustic images obtained from actual measurements using a 49-microphone array with separable geometry. Images were obtained using four different algorithms: delay-and-sum beamforming (DAS), DAMAS2, and two regularized least-squares methods, the first using l1 regularization, the second using total variation (TV) regularization. All algorithms were accelerated using the Kronecker array transform (KAT), a method that is applicable for arrays whose microphones are positioned in a separable, possibly non-uniform grid. We also compare results obtained with and without microphone calibration, verifying the influence of correct calibration. The results show that regularized least-squares methods tend to provide the best results.
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title = {Fast acoustic imaging with separable arrays},
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abstract = {We compare acoustic images obtained from actual measurements using a 49-microphone array with separable geometry. Images were obtained using four different algorithms: delay-and-sum beamforming (DAS), DAMAS2, and two regularized least-squares methods, the first using l1 regularization, the second using total variation (TV) regularization. All algorithms were accelerated using the Kronecker array transform (KAT), a method that is applicable for arrays whose microphones are positioned in a separable, possibly non-uniform grid. We also compare results obtained with and without microphone calibration, verifying the influence of correct calibration. The results show that regularized least-squares methods tend to provide the best results.},
bibtype = {inProceedings},
author = {Masiero, Bruno S. and Arroyo, César S. B. and Nascimento, Vítor H. and Ribeiro, Flávio P.},
booktitle = {Proceedings of the 5th International Symposium on Solid Mechanics}
}
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