采样频率对积分声级计时间平均特性影响的研究

The effect of the sampling frequency on the time averaging characteristics of integrating sound level meter

本文指出了影响积分声级计时间平均特性的主要因素，着重分析了采样频率对于以两次平均的方式给出ＬＡｅｑ的积分声级计的时间平均特牲的影响，并通过实验验证了这一分析。最后指出，要使这种积分声级计的时间平均特牲达到有关标准和规程规定的要求，采样频率应不低于１０００Ｈｚ。

The major factors which affect the time averaging characteristics of integrating sound level meters, the effect of sampling frequency on the time averaging characteristics of integrating sound level meters which give LAeq by two-times average,are presented in this article. The verification of the analysis by experiments is also presented. The results show that the sampling frequency should be higher than 1000Hz in order that the time averaging charactelistics of this kind of integrating sound level meters could conform to relative standards and regulations.