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Static flow resistivity measurements based on the ISO 10534.2 standard impedance tube

机译：基于ISO 10534.2标准阻抗管的静态流动电阻率测量

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摘要

Static flow resistivity is a fundamental parameter governing the sound absorption behavior of different materials, and several methods based on the use of impedance tubes have been developed for measuring the flow resistivity acoustically. However, these methods cannot be directly implemented in the standard impedance tubes that are widely used for measurements of sound absorption coefficients and impedance as defined in ISO 10534.2, because the termination conditions of impedance tubes and the placement of microphones in these existing methods are different. In this paper, a new acoustic method based on the impedance transfer function is proposed to determine the static flow resistivity with a standard impedance tube that complies with ISO 10534.2. The accuracy and the robustness of the proposed method are investigated through the finite element analysis and the feasibility of determining the static flow resistivity is validated through experiments. It is found that the accuracy of the proposed method is sensitive to the acoustic center position of the measurement microphones and the accuracy can be enhanced by increasing the back cavity depth or decreasing the measurement frequency. (C) 2015 Elsevier Ltd. All rights reserved.
机译：静态流动电阻率是控制不同材料的吸声性能的基本参数，并且已经开发了几种基于使用阻抗管的方法来声学测量流动电阻率。但是，这些方法不能在ISO 10534.2中定义的，广泛用于吸声系数和阻抗测量的标准阻抗管中直接实现，因为这些现有方法中阻抗管的端接条件和麦克风的放置是不同的。本文提出了一种新的基于阻抗传递函数的声学方法，用于确定符合ISO 10534.2。的标准阻抗管的静态流动电阻率。通过有限元分析研究了所提方法的准确性和鲁棒性，并通过实验验证了确定静流电阻率的可行性。发现所提出的方法的精度对测量麦克风的声学中心位置敏感，并且可以通过增加后腔深度或降低测量频率来提高精度。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Building and Environment》 |2015年第2期|853-858|共6页
  • 作者

    Tao Jiancheng; Wang Ping; Qiu Xiaojun; Pan Jie;

  • 作者单位

    Nanjing Univ, Inst Acoust, Key Lab Modern Acoust, Nanjing 210093, Jiangsu, Peoples R China;

    Nanjing Univ, Inst Acoust, Key Lab Modern Acoust, Nanjing 210093, Jiangsu, Peoples R China;

    Nanjing Univ, Inst Acoust, Key Lab Modern Acoust, Nanjing 210093, Jiangsu, Peoples R China;

    Univ Western Australia, Sch Mech & Chem Engn, Crawley, WA 6009, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Flow resistivity; Impedance tube; Impedance transfer;

    机译：流动电阻率;阻抗管;阻抗传递;

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