Parametric Acoustic Receiving Array in Two-phase Media

Abstract

Parametric acoustic receiving array can achieve higher space gain with relatively small (virtual) array aperture compare with ordinary line array. The amplitude of the secondary signals of parametric receiving array is proportional to the third power of the acoustic velocity of the medium, and two-phase media is much more practical than single medium with slow acoustic velocity in underwater acoustic engineering. Two-phase media model and equations for the secondary signals of parametric acoustic array are proposed and some calculation examples are given and analyzed.