Dolphin imaging torrent8/26/2023 ![]() ![]() Metamaterials provide a powerful tool to design physical properties through programmable design of microstructure ( 1– 5). The bioinspired two-dimensional metagel breaks the length-wavelength dependence, which paves a previously unexplored way for designing next-generation broadband impedance matching devices in diverse wave engineering.Īcoustic materials have made substantial progress in recent years. Furthermore, we experimentally show that the metagel device offers efficient implementation in broadband underwater ultrasound detection with the benefit of being soft and tunable. Using experimental data of the biosonar from the Indo-Pacific humpback dolphin, we demonstrate through theoretical analysis that broadband transmission is achieved when the bioinspired acoustic impedance function is introduced. The transformer embeds a two-dimensional metamaterial matrix of steel cylinders into hydrogel. Here, we report a previously unknown class of bioinspired metagel impedance transformers to overcome this limit. However, existing design of acoustic impedance matching, which extends exactly by a quarter wavelength, sets a fundamental limit of narrowband transmission. To maximize energy transmission from a source through a media, the concept of impedance matching has been established in electrical, acoustic, and optical engineering.
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