ON SPATIAL SAMPLING USING THE SCANNING INTENSITY TECHNIQUE

Based on a very accurate temporal and spatial sampling of the radiated intensity and pressure field over a thin vibrating aluminium plate, d ifferent scanning procedures and patterns have been simulated by avera ging subsets of the basic data. In general, the different simulated sc anning patterns gave almost identical results in very good agreement w ith the 'ideal' averaging, i.e. averaging all data. Changing the line density, changing the starting point, excluding data at the edges and not scanning after straight lines gave far less deviations than the de viations in the 'ideal' averaged intensities with increasing backgroun d noise levels. (C) 1997 Elsevier Science Ltd.