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Acoustics Performance Research and Analysis of Light Timber Construction Wall Elements Based on helmholtz Metasurface

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Journal of Renewable Materials 2022年第11期10卷 2791-2803页

作者： Si Chen Yuhao Zhou Sarah Mohrmann Haiyan Fu Yuying Zou Zheng Wang Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and TechnologyNanjing Forestry UniversityNanjing210037China College of Civil Engineering Nanjing Forestry UniversityNanjing210037China

Based on the efficient sound absorption characteristics of helmholtz resonance structures in the range of medium and low frequency acoustic waves,this paper investigates an effective solution for light timber construction walls with acoustic *** study takes the light timber construction wall structure as the research *** on the helmholtz resonance principle,the structure design of the wall unit,impedance tube experiment and COMSOL MULTIPHYSICS simulation calculation were carried out to obtain the change rule of acoustic performance of the helmholtz resonance wall unit *** research results show that the overall stability of sound insulation of the structure is improved,and the frequency range with sound transmission loss more than 50 dB in the experimental group is 640–1600 Hz,while in the control group is 500–906 Hz and 1238–1600 Hz;the sound absorption performance of the structure is obviously better than that of the ordinary structure,especially in the low frequency acoustic wave range of 100–320 Hz,the sound absorption coefficient of the experimental group is more than 0.49,while the sound absorption coefficient of the control group is less than *** is expected that these results will contribute to the optimization of the acoustic performance of light timber construction walls and have high application and popularization value.

关键词： Acoustic metasurface aperture embedded helmholtz resonance structure light timber construction low frequency

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