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基于时间延迟的汽车驾驶室吸声系数测量研究

刘刚田 吉晓民

刘刚田, 吉晓民. 基于时间延迟的汽车驾驶室吸声系数测量研究[J]. 机械科学与技术, 2014, 33(8): 1242-1244. doi: 10.13433/j.cnki.1003-8728.2014.0826
引用本文: 刘刚田, 吉晓民. 基于时间延迟的汽车驾驶室吸声系数测量研究[J]. 机械科学与技术, 2014, 33(8): 1242-1244. doi: 10.13433/j.cnki.1003-8728.2014.0826
Liu Gangtian, Ji Xiaomin. The Research of Sound Absorption Coefficient in Automobile Cabs Based on Time Delay[J]. Mechanical Science and Technology for Aerospace Engineering, 2014, 33(8): 1242-1244. doi: 10.13433/j.cnki.1003-8728.2014.0826
Citation: Liu Gangtian, Ji Xiaomin. The Research of Sound Absorption Coefficient in Automobile Cabs Based on Time Delay[J]. Mechanical Science and Technology for Aerospace Engineering, 2014, 33(8): 1242-1244. doi: 10.13433/j.cnki.1003-8728.2014.0826

基于时间延迟的汽车驾驶室吸声系数测量研究

doi: 10.13433/j.cnki.1003-8728.2014.0826
基金项目: 

国家自然科学基金项目(51075124)

河南省科技攻关计划项目(11210221051)资助

详细信息
    作者简介:

    刘刚田(1971-),副教授,博士研究生,研究方向为产品造型设计及理论和人机工程学,liugangtian@126.com

The Research of Sound Absorption Coefficient in Automobile Cabs Based on Time Delay

  • 摘要: 以汽车发动机噪声辐射能量分布为参考,以其实际使用的某一吸声材料为测试对象,将两个麦克风等间距布置在吸声材料的正前方,利用麦克风分别测得麦克风所在位置的声压数值,将所测得的声压进行拉氏变换,再根据两麦克风之间测得声压的时间延时得到声波的反射系数,最后利用声波的反射系数推导出吸声系数。实验表明:利用该方法测量得到的吸声系数在声波频率较低时与驻波管法以及混响室法测量得到的吸声系数基本一致,在所参考汽车发动机噪声辐射能量分布情况下,基于时间延迟的吸声系数测量更快捷,结果具有较好的可靠性。
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  • 收稿日期:  2013-08-17

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