Ultrasound can be classified by the energy amount used: Sound power (W), sound intensity (W m2 ) and sound energy density (Ws m3 ) are the most significant measures used for categorizing ultrasound applications (Knorr et al. 2004). Notably, the applications of ultrasound are classified into low-energy (low power or low intensity) and high-energy (high power or high intensity) ultrasound (Kentish &Ashokkumar, 2011).