Abstract: A method for non-destructive testing of a plurality of components based on measurement signals, each of the measurement signals corresponding to a predetermined different component, including the following steps: obtaining a sequence of at least one signal portion based on each measurement signal, for each pair associating two signal portions having one and the same position in their respective sequence, a distance between these signal portions of the pair is computed, the distance being computed using dynamic time warping, for each signal portion, determining at least one statistical indicator based on the distances of pairs involving said signal portion, the statistical indicator being associated with the component of said signal portion, and for each component, comparing at least one indicator of the component to indicators of other components, and as a function of the comparison, determining the soundness or unsoundness of the component.

Abstract: The present invention relates to a method for detecting, by ultrasound, defects in a material (MS), comprising the steps of transmitting, by M transmitters of index i, and receiving, at sampling times n.Te, by means of M receivers of index j, signals x(n, i, j), forming a sampling matrix (A?) having N columns Yn formed by the signals x(n, i, j) for which a distance between the receiver of index j and the transmitter of index i is equal to the deviation ? and rows Xi,j formed by the signals x(n, i, j), the pair i, j being different from one row Xi,j to the next, calculating a covariance matrix (C?) for the projections Xi,jproj,k of the rows Xi,j of the matrix (A?) on the K eigenvectors (Vk) corresponding to the K largest eigenvalues (?k), subtracting, from each row Xi,j, the K projections Xi,jproj,k to obtain residual measurement signals x*(n, i, j) for detecting defects.