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

Abstract RU 2116705 C1

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/Kmax, where Kmax 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 pn= unEn, un is electric signal which is applied to nth projector; En 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

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RU 2 116 705 C1

Authors

Nekrasov V.N.

Savostin Ju.M.

Dates

1998-07-27Published

1997-04-17Filed