Correction: A Mass-In-Mass Metamaterial Design for Harvesting Energy at a Broadband Frequency Range (Energies, (2023), 16, 16, (5883), 10.3390/en16165883)

In the original publication [1], reference [50] was changed to “Li, T.; Wang, Z.; Xiao, H.; Yan, Z.; Yang, C.; Tan, T. Dual-band piezoelectric acoustic energy harvesting by structural and local resonances of Helmholtz metamaterial. Nano Energy 2021, 90, 106523. https://doi.org/10.1016/j.nanoen.2021.106523” and reference [51] was changed to “Ma, K.-J.; Tan, T.; Liu, F.-R.; Zhao, L.-C.; Liao, W.-H.; Zhang, W.-M. Acoustic energy harvesting enhanced by locally resonant metamaterials. Smart Mater. Struct. 2020, 29, 075025. https://dx.doi.org/10.1088/1361-665X/ab8fcc”. The authors state that the scientific conclusions are unaffected. This correction was approved by the Academic Editor. The original publication has also been updated.