3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-1165-C5-1168
Anisotropie et cohérence spatiale du speckle ultrasonore dans les compositesA. DERODE and M. FINK
Laboratoire Ondes et Acoustique, ESPCI, Université Paris 7, URA 1503 du CNRS, 10 rue Vauquelin, 75005 Paris, France
We briefly present experimental as well as theoretical results on measurements of spatial coherence of ultrasonic pulsed waves in random scattering media, particularly composite materials. We show that a given medium can behave either coherently or incoherently depending on the orientation of the ultrasonic beam, and what this implies in terms of characterization, speckle reduction and defect detection.
© EDP Sciences 1994