Hi. Currently I am doing an impact hammer test. From the example file given for the impact hammer test provided in LabView SignalExpress, there is a graph for triggered hammer [Acceleration (g) versus Time(s)] . This graph only provides me the acceleration of hammer for this particular period of impact. Is there any method to calculate obtain or calcculate the force (N) versus time(s) graph? And what is meant by dB ref 1.0 E+0?