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实现在大环境背景噪声条件下对扬沸前兆微爆噪声的识别，是利用扬沸前兆噪声监测预报扬沸火灾的技术关键。本文则在第一部分的理论基础之上，重点分析了扬沸前兆噪声和典型火灾现场环境噪声的声学特性，从其中寻找出能有效地进行扬沸火灾监测预报的一些特征物理量。为进一步实现在实际火灾现场大环境下利用前兆噪声监测预报扬沸火灾提供了条件。
Realizing the recognition of the booming precursor micro-detonation noise under the condition of large ambient background noise is the key technology to forecast the booming fire using the booming precursor noise. Based on the theory of the first part, this paper focuses on the acoustic characteristics of booming precursor noise and typical scene noise, and finds out some characteristic physical quantities that can effectively predict and forecast booming fires. Which provided the conditions for further monitoring and forecasting booming fires by using precursor noise under the big environment of the actual fire scene.