This project focuses on designing and developing an active impedance surface for water-filled ducts, aimed at enhancing underwater acoustics measurements. The active impedance surface will allow for precise control of sound wave propagation within the duct, improving the accuracy of acoustic data collection in underwater environments. This innovation is intended for applications such as underwater communication, soNor systems, and environmental monitoring, where reliable acoustic measurements are crucial for research and operatioNol efficiency. By modifying impedance properties dyNomically, the system aims to optimize acoustic performance in various underwater conditions, making it a valuable tool for marine research and defense applications.