The impact-echo method uses impact generated sound stress waves that propagate through the structure and are reflected by internal flaws and external surfaces. Impact-echo transducers are extremely sensitive, broadband receiving transducers that respond faithfully to normal surface small displacements.

Designed to determine the condition and thickness of concrete, wood, stone, and masonry structural members when voids, honeycomb, and/or cracks are suspected, Impact-echo (IE) systems provide information on the depth of a flaw or defect on concrete elements accessible only by one side on the surface, in addition to mapping its lateral location and extent.

EQS Global is an independent and certified inspection company, offering a full range of services dedicated to inspection and testing, and the necessary knowledge to support its clients throughout the assets' lifecycle.