水声时变线谱检测的双稳态随机共振方法

将双稳态随机共振系统应用于水声时变线谱信号的检测,提出了设计水声线谱检测系统可以利用的外在参数。分别在水听器端和声源端建立了时变线谱模型,考查了随机共振系统对水声环境的适应能力。实验发现在信噪比变化、声压起伏、线谱漂移等情况下,系统都能较好的工作。为水声领域新型线谱检测系统的设计提供了依据。

Bistable stochastic resonance method of time-varying underwater acoustic line-spectrum detection

Bistable stochastic resonance method is proposed for the detection of time-varying underwater acoustic line-spectrum detection and the parameters can be used in detection system are presented. Time-varying line-spectrum models from acoustic source and hydrophone end are designed. Based on the proposed method, the adaptive capability of stochastic resonance detection system to underwater environment is examined. In circumstances like varying SNR, fluctuating acoustic pressure and frequency excursion, numerical tests show that detection system works well. This research offers a basis for the design of new type line-spectrum instrument in underwater acoustic domain.