Low-Frequency, High-Sensitivity Hydrophone Based on Ionic Polymer. - Jiachuan Han; Yangrui Xie; Peng Fan; Haoyu Guo; Qiao Hu; Qingchang Gao; Yuanshan Jia; Zicai Zhu; Zhenhua Tang (IEEE Trans. Instrum. Meas., 2025)