Patent ID: 7675819
Filing Date: 2010-03-09
Classification: G01S

Abstract:
1. A sonar system for detecting underwater acoustic signals, which comprises: a plurality of hydrophone units capable of converting acoustic impulses to electrical signals, said hydrophone units being substantially vertically oriented when deployed in a body of water, and said hydrophone units occupying at least some of the positions of an N×M rectangular horizontal array wherein N is the number of rows and M is the number of columns in the array, electronics, including a processor, for applying two-dimensional Chebyshev mathematical weighting to the electrical signals from the individual hydrophone units such that each individual signal from each hydrophone unit is assigned a respective weighting number according to its position in the rectangular horizontal array and a numerical value is assigned to each individual signal corresponding to the strength of the electrical signal as adjusted by the respective weighting number; and a canister in which the hydrophone units are loaded and from which said hydrophone units are deployed into the body of water.