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Authors: Casula, G.* 
Fais, S.* 
Ligas, P.* 
Title: Experimental Application of 3-D Terrestrial Laser Scanner and Acoustic Techniques in assessing the quality of stones used in monumental structures
Issue Date: Dec-2008
Keywords: ultrasonic technique
spectral analysis
3D terrestrial laser scanner
Subject Classification04. Solid Earth::04.02. Exploration geophysics::04.02.07. Instruments and techniques 
Abstract: This paper briefly describes the preliminary results of an experimentation aimed to test a new non-destructive methodology based on the integrated application of 3-D terrestrial laser scanning and acoustic techniques in the ultrasonic range (54 kHz) in evaluating the quality of carbonatic stone materials. Our target is to evaluate the state of conservation of stone building materials by correlating ultrasonic longitudinal pulse velocity and frequency spectra of the ultrasonic signals with the reflectivity or reflectance of the reflected 3-D laser scanner beam pulse transmitted to the target of an investigated surface.
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