Accession Number : ADD001254

Title :   Nonlinear Array Hydrophone Simulator.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Kijesky,Michael M

Report Date : 02 May 1974

Pagination or Media Count : 12

Abstract : The patent application describes a device for simulating time delayed outputs resulting from impingement of a point source of sonic energy upon a nonlinear array of hydrophones. An acoustic signal generator provides an analog output signal to a pulse forming circuit which converts the analog signal to a series pulse train which is fed to a shift register clocked at a rate in accordance with the time delays between the hydrophones. Selected outputs from the register are reconverted to analog signals by individual wave forming circuits assigned to each of the shift register outputs. A plurality of noise generators provide noise signal outputs which are independently added to the reconverted analog signals to form a plurality of selectively delayed signals simulative of hydrophone outputs having both signal and noise components, the delays being variable to simulate different angles of sonic energy approach by selection of appropriate shift register outputs.

Descriptors :   *Sonar arrays, *Simulators, Patents, Hydrophones, Acoustic arrays, Nonlinear systems, Signal generators, Shift registers, Angle of arrival

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE