Recent developments of sonar technologies for detection of underwater objects call for accurate evaluation of reflection properties. Reflected sonar signals can be determined and measured in two ways: analytically using physical & mathematical models of underwater objects and experimentally. Constraints of full-scale experimental techniques are identified like large size and complexity of structures, difficult experimental procedures. It is argued that the most optimum way is to use scaled models of test object and probing signal.
$^1$Krylov State Research Centre
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