AUTHOR=Gao Cong , Hu Chuandeng , Mei Jun , Hou Bo , Zhang Xianli , Du Zhanhang , Wen Weijia TITLE=Corrigendum: Barrier-free duct muffler for low-frequency sound absorption JOURNAL=Frontiers in Materials VOLUME=9 YEAR=2022 URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2022.1062941 DOI=10.3389/fmats.2022.1062941 ISSN=2296-8016