Detection of elements with coherent reflectivity inside a multiscatterers incoherent media.
In this paper we use the Spatial Compound method to detect a long element with coherent reflectivity within a vast incoherent media. We consider the case in which the echographics temporal signals of the coherent element, and of the scatterers of the media in which it is hidden are of the same order of amplitude. We calculate analytically the spatial coherent function of the acoustic pressure signals considering space-temporal averages. We find experimentally that when there is a coherent long scatter this function is broader (in the spatial direction along the scatter) than when there is only incoherent media. By selecting short temporal windows of analysis we show the possibility of detecting the depth where the coherent element is located.
Arzúa
Alicia
A
Instituto de Física-Facultad de Ciencias, Universidad de la República, Igua 4225 CC 10773, 11400 Montevideo, Uruguay. alicia@fisica.edu.uy
Negreira
Carlos
C