柔性微穿孔板吸声体声学性能测试与分析

发布时间：2018-04-24 01:36

本文选题：柔性微穿孔板吸声体 + 吸声性能　；参考：《压电与声光》2017年05期

【摘要】：实验探究了高频段(1 500~6 500Hz)柔性微穿孔板吸声体的吸声特性,由于聚氯乙烯(PVC)薄膜具有柔韧性好,黏性不高,易通孔,成本低等特点,因此,该文以PVC为基材,利用阻抗管测试穿孔率分别为2.181%、3.407%、5.436%、7.666%的柔性微穿孔板吸声体的声学性能,并与马氏理论的计算值进行对比。实验结果表明,由于板的振动效应使柔性微穿孔板吸声体的共振峰向低频偏移,且在低频范围内吸声性能提高,高频范围内吸声性能无明显减弱。因此,拓宽了整体的吸声频带宽度,在1 500Hz时,吸声系数可提高约33.9%。
[Abstract]:The sound absorption characteristics of flexible microperforated plate with high frequency band (1 500 ~ 6 500 Hz) were investigated. Because of its good flexibility, low viscosity, easy pore and low cost, the PVC film was used as the substrate in this paper. The acoustic properties of a flexible microperforated plate with a perforation rate of 2.181 and 5.4366% were measured by impedance tube, respectively, and compared with the calculated values of Markov theory. The experimental results show that the resonance peak of the flexible microperforated plate is shifted to the low frequency due to the vibration effect of the plate, and the sound absorption performance is improved in the low frequency range, but the sound absorption performance is not obviously weakened in the high frequency range. Therefore, the overall band width of sound absorption is widened, and the sound absorption coefficient can be increased by about 33.9 at 1 500Hz.
【作者单位】：中国科学院合肥智能机械研究所传感技术联合国家重点实验室;中国科学技术大学合肥物质研究院;河海大学物联网工程学院;
【基金】：国家自然科学基金资助项目(11474291);国家自然科学基金青年基金资助项目(11604077)
【分类号】：TB535.1

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