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在多输入、双输出频域模型的基础上，论述了利用选择双传声器声强法将声强矢量分解为与各噪声源有关分量的理论，讨论和分析了在双通道ＦＦＴ分析仪上实现选择声强法的途径。该方法可以在声源间存在相干和高背景噪声的情况下，精确地进行声源辐射声强的测量。
Based on the multi-input and dual-output frequency-domain models, the theory of using the dual-microphone sound intensity method to decompose the sound intensity vector into the components related to each noise source is discussed. The selection and implementation of the two-channel FFT analyzer Sound intensity method of the way. The method can accurately measure the sound intensity of the sound source in the presence of coherent and high background noise between sound sources.