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首页> 外文期刊>Applied Acoustics >Pressure ratio and phase difference in a two-microphone system under uncertain outdoor sound propagation conditions
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Pressure ratio and phase difference in a two-microphone system under uncertain outdoor sound propagation conditions

机译：在不确定的户外声音传播条件下双麦克风系统中的压力比和相位差

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Predictions of outdoor sound propagation in uncertain conditions are a challenging task. Evidence suggests that using more than one receiver can reduce the effect of uncertainties. This paper studies via numerical simulations the effects of uncertainty in the source/receiver geometry and impedance ground condition on the sound pressure ratio recorded using the two-microphone method. A Monte Carlo method is employed to study the effect of uncertainties in the range and ground parameters. The range and frequency are found to be key parameters which control the resultant probability density function for the absolute sound pressure ratio and phase difference. The introduction of small uncertainty only matters if the uncertainty is present in the distance between the source and receiver. Uncertainties in the impedance ground are found to have a negligible effect. The sound pressure ratio is affected by the uncertainty more strongly at a shorter range. These findings pave the way to the development of more robust methods for outdoor acoustic source localisation and identification from two-microphone data. (C) 2020 Elsevier Ltd. All rights reserved.
机译：在不确定条件下对室外声音传播的预测是一个具有挑战性的任务。证据表明，使用多个接收器可以降低不确定性的影响。本文通过数值模拟研究了不确定度在源/接收器几何形状和阻抗接地条件下使用两麦克风方法记录的声压比的影响。使用蒙特卡罗方法来研究不确定性在范围和地参数中的影响。发现范围和频率是控制所得概率密度函数的关键参数，用于绝对声压比和相位差。如果不确定性存在于源和接收器之间的距离中，则引入小的不确定性。发现阻抗地面的不确定性具有可忽略不计的效果。声压比在更短的范围内更强烈地受到不确定性的影响。这些发现为户外声学源定位和两个麦克风数据的识别铺平了更强大的方法的发展。 （c）2020 elestvier有限公司保留所有权利。

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