measurement of force and moment mobilities using a finite difference technique A. Elliott a , G. Pavi´c b and A. T Moorhouse a a University of Salford, Acoustic Research Centre, Newton Building, M5 4WT Salford, UK b INSA de Lyon - LVA, Bˆatiment St. Exup´ery, 25 bis avenue Jean Capelle, F-69621 Villeurbanne Cedex, France a.s.elliott@pgr.salford.ac.uk Acoustics 08 Paris 1807