title: Using air-coupled sensors to determine the depth of a surface-breaking crack in concrete.
authors.affiliation: Department of Civil, Architectural, and Environmental Engineering, The University of Texas, Austin, Texas 78712-0273, USA.
authors.forename: Seong-Hoon
authors.initials: SH
authors.lastname: Kee
authors.forename: Jinying
authors.initials: J
authors.lastname: Zhu