A TRANSIENT GRATING STUDY OF ACOUSTIC PROPERTIES OF POLYMER MATERIALS D. Blanchard, R. Casalegno, M. Pierre et H. P. TrommsdorffJ. Phys. Colloques, 46 C7 (1985) C7-517-C7-521DOI: https://doi.org/10.1051/jphyscol:1985792