We study the acoustic field of a powerful phased array at different positions of the focus by using an analytical method. Due to the fact that the speed of the analytical calculation is much higher than the rate of the numerical one, the distributions of the pressure amplitude in different planes and in a wide spatial area were obtained. Three-dimensional fields generated by arrays are quite difficult to interpret. For the convenience of the application of the analytical method, a software package that creates a graphical interface for the calculation of the array field and visualization of the results were developed. In the data analysis we determined a region of focusing space, in which strong side effects do not appear.
M. V. Lomonosov Moscow State University, Physics Faculty, Department of Acoustics. 119991, Moscow, Russia.
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