Used properly, impulse radar causes no damage to a structure or delicate finishes and minimal disruption to the working environment. It can be used effectively on materials including wood, stone, brick, concrete, and ground strata. Radar has been used as the principal investigative technique on bridges, ruined castles, roads, inhabited historic buildings, modern concrete structures, and ancient earthworks. This change causes energy to be reflected at the boundary between different materials so that it reaches the receiver, producing a record of the interference. Both the transmitted and received signals are waves.
Impulse radar records the change in that electrical difference.
When specifying any investigation, the focus should be on the answers sought by the survey, together with the uses to which those answers will be put. Structural, historical, or speculative information should be made available to the investigators as it will enhance the accuracy of their interpretations. Radar does not directly measure the physical characteristics of a structure. It does, however, provide a means by which these characteristics can be inferred, cost effectively and with minimal disruption. Impact Echo Impact echo, or dynamic impedance, testing was developed to calculate the depths and condition of large bodies of homogeneous solid material and is best suited to structures of uniform composition and thickness, such as slabs, blocks of material, or pipes.