By measuring the parameters of weak random screens with AFM and constructing a specially designed setup with gated integrator, the properties of autocorrelation functions of speckle fields produced by weak random screens on the focused and defocused image planes are studied experimentally.

First-order statistical properties of ultrasonic speckles back-scatteredfrom a kind of weak scattering interface;

So to decide weak scattering by means of is not accurate.

A new method measuring speed of sound in a weak scattering fluid is proposed by using the ultrasound- modulated light.

The measurement of the autocorrelations function of speckles produced by random scattering screens;