In this paper a three-layer plate with symmetrical structure to solve the prob-lem of determining the properties of the middle layer, which can propagate the harmonic wave in three-layer plate with phase speed equal to the phase speed of a single-layer plate.
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Physics
, 2025, Issue 1, pp. 1–10
ISSN Online: 0000-0000
DOI:
10.xxxx/example-doi