caa a22 4500 606172750 CHVBK 20210128100730.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s10921-015-0276-x doi (NATIONALLICENCE)springer-10.1007/s10921-015-0276-x Locating Events Using Time Reversal and Deconvolution: Experimental Application and Analysis [Elektronische Daten] [Johannes Douma, Ernst Niederleithinger, Roel Snieder] Time reversal techniques are used in ocean acoustics, medical imaging, seismology, and non-destructive evaluation to backpropagate recorded signals to the source of origin. We demonstrate experimentally a technique which improves the temporal focus achieved at the source location by utilizing deconvolution. One experiment consists of propagating a signal from a transducer within a concrete block to a single receiver on the surface, and then applying time reversal or deconvolution to focus the energy back at the source location. Another two experiments are run to study the robust nature of deconvolution by investigating the effect of changing the stabilization constant used in the deconvolution and the impact multiple sources have upon deconvolutions' focusing abilities. The results show that we are able to generate an improved temporal focus at the source transducer using deconvolution while maintaining the robust nature of time reversal. Additionally, deconvolution's costs are negligible due to it being a preprocessing step to the recorded data. The technique can be applied for detailed investigation of the source mechanisms (e.g. cracks) but also for monitoring purposes. Springer Science+Business Media New York, 2015 Time reversal nationallicence Deconvolution nationallicence Concrete nationallicence Acoustic emission nationallicence Douma Johannes Center for Wave Phenomena, Colorado School of Mines, Golden, CO, USA aut Niederleithinger Ernst BAM Federal Institute for Materials Research and Testing, Berlin, Germany aut Snieder Roel Center for Wave Phenomena, Colorado School of Mines, Golden, CO, USA aut Journal of Nondestructive Evaluation Springer US; http://www.springer-ny.com 34/1(2015-03-01), 1-9 0195-9298 34:1<1 2015 34 10921 https://doi.org/10.1007/s10921-015-0276-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10921-015-0276-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Douma Johannes Center for Wave Phenomena, Colorado School of Mines, Golden, CO, USA aut NATIONALLICENCE 700 1- Niederleithinger Ernst BAM Federal Institute for Materials Research and Testing, Berlin, Germany aut NATIONALLICENCE 700 1- Snieder Roel Center for Wave Phenomena, Colorado School of Mines, Golden, CO, USA aut NATIONALLICENCE 773 0- Journal of Nondestructive Evaluation Springer US; http://www.springer-ny.com 34/1(2015-03-01), 1-9 0195-9298 34:1<1 2015 34 10921