Underwater sound stealth metasurface model based on acoustic black hole theory

The invention relates to an underwater sound stealth metasurface model based on an acoustic black hole theory, which comprises a substrate, the upper end face of the substrate is provided with a plurality of curved surfaces which are horizontally and continuously distributed, the substrate is made of a metal material, and the impedance of the substrate is greater than 30 times of that of water; the curvature of the curved surface satisfies L = 2 (x-w) 2, x is a horizontal axis coordinate value, and lambda is an incident sound wave wavelength; the embedded structure is embedded into the curved surface of the base body, the embedded structure and the base body are combined to form a rectangular structure, the embedded structure is made of a flexible material, and the impedance of the embedded structure is close to that of water. The device is compact and reasonable in structure and convenient to operate, the metasurface is designed by embedding the local non-uniform structure, surface wave conversion of underwa