[en] The energy absorbing characteristics of a vibrating system is termed as damping. The phenomena is very important for structures subjected to earthquake and other dynamic loading conditions where small duration are involved. Damping characteristics of a material play an important role in overall stability of a structure. The higher is the damping value, the shorter will be the time to disappear the vibrations. However, damping requirement at the cost of strength of a given material is not justified in any case. This paper describes that the damping of material can be calculated from the time history curve as well as resonance frequency curve. Both these curves are available in new testing arrangements of Impulse Load Test (I. L.T.) and therefore were utilized for damping evaluation of concrete [i). In this paper, the author is describing the I. L.T test either on cement concrete or asphalt concrete by considering relevant ASTM specifications. There are certainly different variables taken into account with respect to cement concrete or asphalt concrete. After the experiment, the conclusions are drawn in different ways depending upon either the specimen is of cement concrete or asphalt and by considering their relevant variables. (author)