Publisher copyright and source must be acknowledged with citation ; There are few equations for underwater communications in the related literature. They show that the speed propagation and absorption coefficient in freshwater are independent of the working frequency of the transmitted signals. However, some studies demonstrate that electromagnetic waves present lower losses when they are working at certain frequencies. In this paper, we perform a set of measurements of electromagnetic (EM) waves at 2.4 GHz in the underwater environment. In our study case, we fix the water conditions and we measure the behavior of EM as a function of several network parameters such as the working frequency, data transfer rates and modulations. Our results will show that higher frequencies do not mean worse network performance. We will also compare our conclusion with some statements extracted from other works. ; Ministerio de Ciencia e Innovacion [TEC2011 - 27516] ; Polytechnic University of Valencia [PAID-05-12; SP20120420] ; Instituto de Telecomunicacoes, Next Generation Networks and Applications Group (NetGNA), Portugal ; FCT Fundacao para a Ciencia e a Tecnologia [PEst - OE/EEI/LA0008/2013] ; Sendra Compte, S.; Lloret, J.; Rodrigues, JJPC.; Aguiar, JM. (2013). Underwater Wireless Communications in Freshwater at 2.4 GHz. IEEE Communications Letters. 17(9):1794-1797. doi:10.1109/LCOMM.2013.072313.131214. ; Senia ; 1794 ; 1797 ; 17 ; 9