Statistics of ultrasonic speckles reflected From a rough surface

摘要

First-and second-order statistical properties of ultrasonic speckles reflected from A rough interface re studied theoretically and experimentally in this paper. A theoretical Model for predicting statistical properties of ultrasonic speckles is constructed, based on the Fresnel-Huygens principle and three basic assumptions. Distributions of the amplitude and Phase of ultrasonic speckles in a scattering space are studied; the study shows that they are In the form of Rayleigh and uniform distribution, respectively. Using the proposed model, The average transverse size of the speckles within a scattering domain, which are received by A focus probe, is investigated.