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Difficulties Associated with the Acoustic Source Localization in Anisotropic Plates and Its Solution
Abstract
Acoustic source localization technique for anisotropic plates proposed by the authors in an earlier publication is applied here to a carbon fiber composite laminate. Difficulties associated with this technique are investigated. It is noted that the accuracy of this technique depends strongly on the accuracy of the measurement of the time delays in recorded signals by three receiving sensors placed in close proximity in the sensor cluster. The sensor cluster is needed to obtain the direction of the acoustic source without knowing the material properties of the plate. It is proposed here that to obtain the accurate time delays not the full time histories but only the beginning part of every time history (the first dip and peak) should be taken for the subsequent steps of signal processing. With these modifications improved predictions are obtained.