Accession Number : ADD014657

Title :   Variable Focusing Sonar.

Descriptive Note : Patent, filed 22 Oct 68, patented 3 Jul 90,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Bealor, Jesse L , Jr ; Cook, Rufus L

Report Date : 03 Jul 1990

Pagination or Media Count : 7

Abstract : The received signal from an acoustic echo detection and ranging system is compared with internally generated signals indicating the focus of a variable focus transducer. Logic circuits in the signal comparison channel develop control voltages to focus said transducer upon a predetermined area from which said received signal originates. Patents. (jhd)

Descriptors :   *PATENTS, *SONAR, *BEAM FORMING, ACOUSTIC DETECTION, ACOUSTIC WAVES, CHANNELS, COMPARISON, FOCUSING, INTERNAL, LOGIC CIRCUITS, SIGNALS, SONAR TRANSDUCERS, VARIABLES

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE