The authors wish to make the following erratum to this paper: "Martins, M.S.; Faria, C.L.; Matos, T.; Goncalves, L.M.; Cabral, J.; Silva, A.; Jesus, S.M. Wideband and Wide Beam Polyvinylidene Difluoride (PVDF) Acoustic Transducer for Broadband Underwater Communications. Sensors 2019, 19, 3991. doi: 10.3390/s19183991"