选择双传声器声强法及其在双通道FFT分析仪上的实现

The Selective Two-Microphone Sound Intensity Method and Its Implement on a Dual FFT Analyser

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。

On the basis of a multiple-input and two-output frequency-domain model, this paper discusses the theory which decomposes the sound intensity vector into components of the related sources by using the selective two-microphone sound intensity method and the technique to implement this method with a dual channel FFT analyser.This method can accurately measure the sound intensity from coherent sources and high background noise.