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首页> 外文期刊>The Journal of the Acoustical Society of America >On the statistical errors in the estimate of acoustical energy density by using two microphones in a one dimensional field
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On the statistical errors in the estimate of acoustical energy density by using two microphones in a one dimensional field

机译：关于在一维场中使用两个麦克风估算声能密度的统计误差

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It was recently shown that the statistical errors of the measurement in the acoustic energy density by the two microphone method in waveguide have little variation when the losses of coherence between microphones increase. To explain these intervals of uncertainty, the variance of the measurement is expressed in this paper as a function of the various energy quantities of the acoustic fields-energy densities and sound intensities. The necessary conditions to reach the lower bound are clarified. The results obtained are illustrated by an example of a one-dimensional partially coherent field, which allows one to specify the relationship between the coherence functions of the pressure and particle velocity and those of the two microphone signals. (C) 2008 Acoustical Society of America. [DOI: 10.1121/1.2973232]
机译：最近显示出，当麦克风之间的相干损耗增加时，在波导中通过两个麦克风方法进行的声能密度测量的统计误差几乎没有变化。为了解释这些不确定性区间，本文将测量的方差表示为声场的各种能量（能量密度和声音强度）的函数。阐明了达到下限的必要条件。一维部分相干场的示例说明了所获得的结果，该域使人们可以指定压力和粒子速度的相干函数与两个麦克风信号的相干函数之间的关系。 （C）2008年美国声学学会。 [DOI：10.1121 / 1.2973232]

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