Metasurface model with underwater sound focusing function and manufacturing method thereof

The invention relates to a metasurface model with an underwater sound focusing function and a manufacturing method of the metasurface model. A metasurface model with an underwater sound focusing function comprises at least one metasurface structure, and a single metasurface structure corresponds to a metasurface model of one period. Each metasurface structure comprises a plurality of uniform medium units which are sequentially arranged at intervals in the horizontal direction, every two adjacent uniform medium units are separated through a partition plate, and bottom plates are installed at the bottoms of the uniform medium units and the bottoms of the partition plates at the same time. The impedance value corresponding to each uniform medium unit in the single metasurface structure meets the formula 1. Single-point or multi-point sound focusing can be achieved at any underwater position, the structure is simple, the size is small, the manufacturing difficulty is low, and therefore the wide engineering applic