Characteristics and mechanism of coupling effects in parallel-cladded acoustic waveguides Guanjun Yin, Pan Li, Xuebing Yang, Ye Tian, Jing Han, Wei Ren and Jianzhong Guo Acta Acust., 6 (2022) 8 Published online: 08 February 2022 DOI: 10.1051/aacus/2022002