MITE
发表于 2025-4-1 04:21:56
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终点
发表于 2025-4-1 07:02:37
https://doi.org/10.1007/978-3-658-01186-4 spherical waves sound field has been analyzed so far, but it has hardly known about the scattering in focused beam sound field. In this paper spectrum of echo scattered by a simple object in focused sound field is analyzed by using the mathematical expressions of echo presented at the previous symp