ИСТИНА

Acoustic imaging is an alternative way to see through aggressive media. Acoustic waves in contrary to electromagnetic waves can freely propagate through liquids, a tissue, and a variety of other materials that are non-transparent at many or all wavelengths of electromagnetic fields. Acoustic images are different from optical images in that they are essentially maps of density variations. Sound waves reflect from boundaries between different materials, carry back information about distances and changes in density and object shape to a receiving waveguide matrix. Proposing remote acoustic imaging is a new imaging technique that uses acoustic probe pulses and a receiving waveguide matrix to detect and view objects inside a liquid that is opaque to light. Spatial resolution of the method is derived by efficiency of ultrasonic scattering at objects, sensitivity of an ultrasonic radiation-reception matrix and the number of waveguides and the distance between them. The technique is useful when efforts are concentrated at revealing presence, location and shape of small objects. In the paper theoretical analysis of interaction of probe ultrasonic radiation with diverse types of small objects has been done. Performed theoretical assessments have been employed for interpreting acoustic images of objects in water.