Nonlinear Propagation of Ultrasound in Liquid Media
It is well known that acoustic phenomena are fundamentally nonlinear, though a large class of acoustical phenomena can be dealt with by linearizing the equations of motion leading to acceptable and usable solutions(1,2). This is, of course, very convenient as the nonlinear relations are extremely difficult to deal with. However, it is necessary on occasion to have more details of the propagation processes, e.g., for a more profound understanding of the phenomena, than can be obtained from the linear theories. Thus, a program has been initiated to examine this question and preliminary measurements give an indication of the degree of nonlinearity of biological media.
KeywordsDisplacement Amplitude Biological Medium Pressure Amplitude Nonlinear Relation Preliminary Measurement
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