基于SEA分析验证的混响箱-消声室实验方法设计及隔声性能研究

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (8) : 258-263.

论文

张磊1,2，郑旭1，陈军2，郝志勇1

作者信息 +

A reverberation chamber-anechoic room experimental method design based on SEA analysis and STL research

ZHANG Lei1,2, ZHENG Xu1, CHEN Jun2, HAO Zhiyong1

Author information +

文章历史 +

摘要

不同于以往的理论、经验设计，采用低频段的声固耦合法、中高频段的统计能量法（SEA）对设计的混响声场进行声学分析，提高混响水平。根据虚拟结果建立混响箱实物，置于半消声室内进行测试，混响箱结构本体的噪声衰减量超过50 dB，混响时间达到混响要求，混响场内不同位置声压值差距均小于2 dB，该混响箱设计满足混响声场的要求；将SEA法隔声计算结果与应用混响箱-消声室法对板件的隔声测试结果进行对比，两者吻合良好；因此该实验方法能实现很好的隔声效果。通过该方法可快速对单层板及夹层板件进行隔声测试，发现吻合频率效应对隔声性能影响较大；以上研究对工程应用有较大的参考意义。

Abstract

Different from the theoretical and empirical design, a structure sound coupling method of low frequency and a SEA method of mid-high frequency were used to analyze the reverberant sound field to increase the reverberation level.The reverberant chamber was designed and made based on virtual result.The entity was placed into the anechoic room to be tested, which shows that the reverberation time meets the request and the SPL in different positions of the sound field only has gap within 2 dB between each other.The STL result of the SEA method for panel was compared with the test result by using the reverberation chamber-anechoic room method, which shows good agreement.The experiment method thus can realize great STL effect.By using this method to test sound insulation of single layer panel and sandwich panel rapidly, it was found that coincidence frequency effect has a significant impact on STL performance.The above findings offer meaningful reference to the engineering application.

导出引用

张磊1,2，郑旭1，陈军2，郝志勇1. 基于SEA分析验证的混响箱-消声室实验方法设计及隔声性能研究[J]. 振动与冲击, 2020, 39(8): 258-263

ZHANG Lei1,2, ZHENG Xu1, CHEN Jun2, HAO Zhiyong1. A reverberation chamber-anechoic room experimental method design based on SEA analysis and STL research[J]. Journal of Vibration and Shock, 2020, 39(8): 258-263

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