The development of the Impulse Index as an indicator of pavement condition has been previously described in a report of the College of Engineering Research Division of Washington State University entitled, "Pavement Deflection Measurement--Dynamic--A Feasibility Study, Final Report," June 1970, by Frank W. Brands, PE and John C. Cook, PE.
To implement the convenient acquisition of the Impulse Index, a self-contained hand-carriable "Impulse Index Computer" was to be designed and built. The unit is especially adapted for demonstration purposes and for determining the Impulse Index at specific locations.
This report describes the Impulse Index Computer which has been built. Some illustrative test results are also included