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. 2024 Aug 24;16(17):2405. doi: 10.3390/polym16172405

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© 2024 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

PMC Copyright notice

(a) The coordinate transformation method of elliptical acoustic cloak. The sound pressure scattering effect of the acoustic cloak when the sound wave is incident in the x-axis (b) and y-axis (c) directions. Reproduced with permission from [64]. Copyright © 2022, Springer Nature. Based on the multi-region segmentation coordinate transformation (d), the scattering pressure field (e) and cosine similarity simulation (f) of the acoustic cloak are designed. Reproduced with permission from [65]. Copyright © 2019, IOP Publishing.