Fig. 9From: Automated Surface Wave Measurements for Evaluating the Depth of Surface-Breaking Cracks in ConcreteThe coefficient of variation (COV) of the surface wave transmission TrPZT and velocity CRPZT: a, b COV of TrPZT measured in concrete specimens 1 and 2, respectively, b COV of CRPZT measured in concrete specimens 1 and 2, respectively.Back to article page