The Wigner Distribution (WD) is a signal transformation allowing the simultaneous study, in both the time and frequency domains. of some characteristics of the process of which this signal is representative. It is particularly useful for the study of non-stationary signals. Non-linear acoustic wave propagation has become a source of great concern in medical ultrasound because of the suggested possibility of damage to tissues insonated with commercial medical ultrasound equipment. Its main relevant characteristic is the change in the frequency contents of the acoustic wave as it propagates along a medium wlth the generation of steepening wavefronts. This paper shows the applications of the WD to the study of finite-amplitude effects of ultrasound propagation in water.

The Wigner Distribution (WD) is a signal transformation allowing the simultaneous study, in both the time and frequency domains. of some characteristics of the process of which this signal is representative. It is particularly useful for the study of non-stationary signals. Non-linear acoustic wave propagation has become a source of great concern in medical ultrasound because of the suggested possibility of damage to tissues insonated with commercial medical ultrasound equipment. Its main relevant characteristic is the change in the frequency contents of the acoustic wave as it propagates along a medium wlth the generation of steepening wavefronts. This paper shows the applications of the WD to the study of finite-amplitude effects of ultrasound propagation in water.