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本文介绍了用双传声器声强传感器的声强计测量原理和声强传感器特性；特别 介绍了互功率谱密度法测量原理。同时应用日本小野测器公司的声强测量系统（ＣＦ－ ５００）和（ＣＦ－５０２）作了声强和声功率的测量。消声室和现场的比较试验结果，证明 了双传声器工功率谱密度法声强测量能有效地在现场确定声源的声功率。
This paper introduces the principle of sound intensity meter and the characteristics of sound intensity sensor using double microphone sound intensity sensor. In particular, the principle of mutual power spectral density method is introduced. At the same time, Japan’s Ono measured the sound intensity measurement system (CF-500) and (CF-502) for the sound intensity and sound power measurements. The results of the anechoic chamber and the field comparison proves that the sound power density of the dual microphone power spectral density method can effectively determine the sound power of the sound source in the field.