This thesis aims at the seawater application environment of a sort Acoustic Interference Device ,according to the circuit design request of the device, studied how to make use of some special physical characteristics of seawater to design electronic circuit, enhancing electric circuit Security and credibility for explosion and have very strong engineering application background.

Aiming at the interferences with and without noise jammer,this paper established a detect model for active acoustic homing torpedo based on the active sonar equation,obtained the detect ranges of torpedo active acoustic homing under the different sea states,submarine board angles and torpedo running depths.

By analyzing the mechanism of noise jammer,we design a simulation test for torpedo attack,conduct a regression analysis for test result,and obtain a regression forecast formula of hit probability to calculate and set trajectory parameters for different simulations.

After using noise jammer,submarine′s course relate to the effect of acoustic countermeasure against torpedo and the successful elusion probability of submarine.

Research on effectiveness of noise-jammer against active sonar of torpedo;

Effect of broadband noise jammer against passive sonar;

Discussion about the use of a low frequency noise-jammer against a line-guided torpedo;

Based on the low frequency noise-jammer s working principle, the valid interfere area is presented, and through simulation the effectiveness of noise-jammer is calculated when navy vessel use it rivaling line-guided torpedo.