1. A method of estimating a scattered impulse response at one or more spatial points of interest on a structure, comprising: collecting data at one or more spatial points of interest on the structure using a movable transducer, wherein the data collection includes individually exciting at least one transducer on the structure with a known excitation function and recording measurements with the movable transducer; computing an estimated scattered impulse response at the one or more spatial points of interest based on the collected data.