A mechanical or physical shock is a sudden acceleration caused, the shock of the fall pdf example, by impact, drop, kick, earthquake, or explosion. Shock is a transient physical excitation. Shock describes matter subject to extreme rates of force with respect to time.
The Shock response spectrum is a method for further evaluating a mechanical shock. Determining the ability of structures to resist seismic shock: earthquakes, etc. Shocks are usually measured by accelerometers but other transducers and high speed imaging are also used.
Field shocks are highly variable and often have very uneven shapes. Noise can be reduced by appropriate digital or analog filtering.