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. 2015 Aug 18;5:13175. doi: 10.1038/srep13175

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(a) Analytic calculation of scattering cross-section reduction of a coated neutrally buoyant stainless steel shell as a function of scaled coating parameters at fixed and ϕ_c. Non-resonant cancellation and resonant modal cancellation/enhancement regions are indicated. (b) Extracted effective bulk modulus and effective density for lossless silicone rubber coating, on a neutrally buoyant HBC, as a function of thickness, T. (c) 2D FEM calculated scattering cancellation σ₀, of a neutrally buoyant, stainless steel HBC, as a function of silicone coating thickness for frequencies 10 kHz–40 kHz.

Inline graphic — (a) Analytic calculation of scattering cross-section reduction of a coated neutrally buoyant stainless steel shell as a function of scaled coating parameters at fixed and ϕ_c. Non-resonant cancellation and resonant modal cancellation/enhancement regions are indicated. (b) Extracted effective bulk modulus and effective density for lossless silicone rubber coating, on a neutrally buoyant HBC, as a function of thickness, T. (c) 2D FEM calculated scattering cancellation σ₀, of a neutrally buoyant, stainless steel HBC, as a function of silicone coating thickness for frequencies 10 kHz–40 kHz.