Accession Number : ADD003001

Title :   Sonar Reverberation Simulation.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Clapsaddle,Arthur B

Report Date : 10 Feb 1976

Pagination or Media Count : 7

Abstract : The patent relates to simulation of sonar reverberation signals accomplished from square pulses, the timing and duration of which are computer determined by known principles by processing the pulses through novel shaper means including diode controlled charging and discharging of a capacitor through different selected resistances to provide appropriate ascent and descent curves to the pulses. The shaped pulses are then used to pulse modulate a doppler-shifted carrier signal which is generated by a voltage controlled oscillator responsive to control signals which are functions of ship's speed, transmission angle and the like. The resulting pulse modulated doppler-shifted carrier is then attentuated to provide the desired simulated reverberation signal components.

Descriptors :   *Sonar signals, *Simulators, *Patents, Reverberation, Training devices, Background noise, Simulation

Subject Categories : Humanities and History
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE