METHOD FOR MODELING HYDROACOUSTIC FIELDS Russian patent published in 1998 - IPC

FIELD: graduation and calibration of hydroacoustic receivers, in particular, hydroacoustic antennas in closed narrow hydroacoustic chambers in laboratory conditions or in hydroacoustic sonar systems in field tests. SUBSTANCE: method involves arranging hydroacoustic projectors so that maximal distance between any adjacent projector is not greater than π/K_max, where K_max is maximal reciprocal wave length in modeled acoustic field. Electric signals which are applied to hydroacoustic projectors conform to condition , where is vector which elements are p_n= u_nE_n, u_n is electric signal which is applied to nth projector; E_n is its sensitivity; is inverse matrix for matrix with elements is radius vector of point in which m-th projector is located; is solution of wave equation for required volume in case if only nth projector operates in this volume; is vector which elements are is pressure distribution function in modeled acoustic field. EFFECT: possibility to model arbitrary acoustic fields with finite spectrum of three-dimensional frequencies. 3 dwg