Accession Number : ADD015081

Title :   Passive Ranging Sonar System.

Descriptive Note : Patent, Filed 4 Feb 66, patented 23 Jul 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Clearwaters, Walter L

Report Date : 23 Jul 1991

Pagination or Media Count : 10

Abstract : A passive acoustic detector including a line hydrophone and apparatus coupled thereto operable to utilize the energy sensed by the elements of the hydrophone during passive listening to effect scanning in depression-elevation by delaying for directivity and then combining acoustic energies sensed by the hydrophone elements and recording the combined energies on a x-y strip recorder for enhanced signal-to-noise ratio. (Author)

Descriptors :   ACOUSTIC DETECTORS, ACOUSTICS, ENERGY, GRIDS(COORDINATES), HEARING, HYDROPHONES, PASSIVE SONAR, PASSIVE SYSTEMS, RANGE FINDING, RECORDING SYSTEMS, SIGNAL TO NOISE RATIO

Subject Categories : Acoustic Detection and Detectors
      Target Direction, Range and Position Finding

Distribution Statement : APPROVED FOR PUBLIC RELEASE