Extracorporeal shockwaves (ESW) are pressure waves generated acoustically. Shockwaves are different from other acoustic waves because they are at a lower frequency. There are many examples of these sonic pulse waves in real life. A good example is the sound of thunder following the flash of lightning. A more day to day version of a shockwave are those created by clapping. One of the most dramatic examples of shockwaves and their effects is an aeroplane breaking the sound barrier which generates an audible bang and can lead to the breakage of glass even in distant areas.