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

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (8) : 258-263.

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

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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.

Key words

statistical energy analysis(SEA) / structural-acoustic coupling / reverberant field / reverberation chamber-anechoic room / sound transmission loss(STL) / sandwich panel

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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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