本文全面系统地介绍了随机共振的概念、机制、理论和实验研究的主要进展及研究现状。对随机共振的可能应用也做了富有建设意义的展望性介绍，并利用电子线路模拟实验给出了从强噪声中准确提取弱调制信号的一种新方法。实验结果表明:振幅调制信号的信噪比(Signal-to-NoiseRatio一SNR)响应曲线SNR-H(H为输入噪声强度)不仅存在类似的随机共振现象，而且在一定的噪声强度范围内调制信号的输出信噪比远大于其输入信噪比。有关调制信号强度及调制信号频率对调制信号随机共振行为的影响，本文也做了较为全面的实验研究，并在理论方面进行了相应的研究和讨论，给出了绝热近似条件下，调幅波和白噪声驱动双稳系统调制信号输出信噪比的近似解析表达式。最后，把理论结果和实验结果进行了定性的比较。

In this paper the concept, mechanism, main advance in theoretical researches and experimental researches and current situation of stochastic resonance(SR) are provided systemly and overall. The possible application of it also is introduced constructively and prospeclively, a new way to separate modulation signal from noise is provided by using an electronic circuit analog experiment. The experimental results show: there is not only a resonance like behavior (SR) in the Signal-to-Noise(SNR) response carve SNR-H(H is the input noise strength), in the certain range of noise strength the SNR of the modulation signal in output is but also considerably higher than that in the input. On the influence of the modulation strength and modulation frequency on the SR behavior of modulation signal are investigated overall in the experimental aspect and theoretical aspect. Under the condition of adiabatic approximation the analytical formulation of SNR of modulation signal in output of bistable system subject to modulated wave and white noise is Provided. The theoretical results are compared qualitatively with the experimental results.