Accession Number : ADD017347

Title :   Method and Apparatus For Locating An Acoustic Source.

Descriptive Note : Patent, Filed 22 Oct 93, patented 18 Oct 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Bates, Bruce J ; Bates, Susan M

Report Date : 18 Oct 1994

Pagination or Media Count : 15

Abstract : An apparatus and method for determining the range and depth to an acoustic source from a sampling site in a medium. A linear array of pressure transducers monitors the acoustic field produced by the acoustic source. A measurement processor utilizes the measured acoustic field to produce an initial field condition for each member of the array. An environmental model include environmental data in the form of acoustically pertinent field condition and the acoustically pertinent variables to produce, for each incremental range and depth, an amplitude function. An index processor normalizes the amplitude functions for each incremental range and depth, and an index extreme value processor selects the amplitude function with the maximum amplitude. The range and depth of that extreme value amplitude function is used to determine the range and depth for the acoustic source. (AN)

Descriptors :   *ACOUSTIC FIELDS, *PATENTS, ALGORITHMS, PRESSURE TRANSDUCERS, ACOUSTIC WAVES, SIGNAL TO NOISE RATIO, ACOUSTIC DETECTION, INPUT OUTPUT PROCESSING, DEPTH, FINITE DIFFERENCE THEORY, SAMPLING, ACOUSTIC SIGNALS, MONITORS, LINEAR ARRAYS, SUBROUTINES, AMPLITUDE, UNDERWATER ACOUSTICS, ACOUSTIC VELOCITY, ITERATIONS, SEA WATER, ACOUSTIC DATA, SOUND PRESSURE, SOUND RANGING

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE