Underwater acoustic (UWA) communication is an essential technology for networking underwater drones and sensors to enable more efficient underwater exploration. Most existing UWA communication systems use omnidirectional transducers to transmit and receive sound waves. However, the use of omnidirectional transducers requires high-power transmission and complex signal processing due to the significant delay spread. In contrast, directional transducers have gained attention due to their potential for low power consumption and simplified communication. In the field of underwater imaging, the utilization of UWA reflectors has been explored. These devices operate on the same principle as optical reflectors, forming a sound beam without the need for an electrical circuit. In this paper, we propose the use of such acoustic reflectors for UWA communication to achieve energy-efficient and simplified data transmission. We conducted three simulations to evaluate the performance of UWA communications in reflective and non-reflective environments, considering both line-of-sight and non-line-of-sight conditions. The results obtained from the simulations demonstrate that the use of a parabolic reflector enhances the quality of UWA communication by focusing the signal power toward the receiver and reducing delay spread in the UWA channel.
