 This research proposes a novel metastructure laminar hull concept using periodic layered phononic crystals to optimize the sound insulation performance on the air solid side of the hull structure. The acoustic transmission performance is evaluated using the transfer matrix, the acoustic transmittance, and the tunneling frequencies. The theoretical and numerical models for a proposed thin solid air sandwiched metastructure hull indicate ultra-low transmission within a 50 to 800 Hertz frequency band and with two predicted sharp tunneling peaks. The corresponding 3D printed sample experimentally validates the tunneling peaks at 189 Hertz and 538 Hertz with 0.38 and 0.56 transmission magnitudes respectively with the frequency band between those values showing wide band mitigation. The simplicity of this metastructure design provides a convenient way to achieve acoustic band filtering of low frequencies for marine engineering equipment and accordingly, an effective technique for low frequency acoustic mitigation. This article was authored by Fuxi Zhang, Sini Sun, Wei Tao, and others. We are article.tv, links in the description below.