White paper: Technical-scientific Informative ITC-06 / ATCP Determination of composites elastic moduli using the Impulse Excitation Technique ATCP Physical Engineering Sonelastic Division www.sonelastic.com Authors: Lucas Barcelos Otani, PhD (Otani, L.B.) 1 Antônio Henrique Alves Pereira, PhD (Pereira, A.H.A.) 1 Revision: José Daniel Diniz Melo, PhD (Melo, J.D.D.) 2 Sandro Campos Amico, PhD (Amico, S.C.) 3 ( 1 ) ATCP Physical Engineering ( 2 ) Federal University of Rio Grande do Norte ( 3 ) Federal University of Rio Grande do Sul Version 1.5 08/2022