柔性微穿孔板吸声体声学性能测试与分析  

Acoustics Property Measurement and Analysis of Flexible Micro-perforated Panel Absorber

作　　者：张晓晓 王焕钦[1] 孔德义 钱玉洁[3] 李国欣 王兵 

机构地区：[1]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,安徽合肥230031 [2]中国科学技术大学合肥物质研究院,安徽合肥230026 [3]河海大学物联网工程学院,江苏常州213022

出　　处：《压电与声光》2017年第5期678-681,共4页Piezoelectrics & Acoustooptics

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)

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%。The sound absorption performance of flexible micro-perforated panel absorber（MPPA）at high frequency range from 1 500~6 500 Hz is investigated experimentally in this paper.Since the polyvinyl chloride（PVC）materials have many advantages such as good flexibility,low viscosity,easy-to-piercing,low cost,and so on,the PVC is used as the perforated material.The impedance tube is used to test the sound absorption performance of the PVC-MPPA with perforation rate of 2.181%、3.407%、5.436%、7.666% respectively,and then compared with Maa′s model.The experimental results show that the absorption peaks due to the panel vibration effect have a low frequency offset.The sound absorption performance of flexible MPPA is improved significantly at low-frequency range while keeping almost the same at high-frequency range,therefore the frequency band width of sound absorption is widened,and the absorption coefficient increases of about 33.9% at 1 500 Hz.

关 键 词：柔性微穿孔板吸声体 吸声性能 吸声系数 聚氯乙烯(PVC) 偏离率 

分 类 号：TN0[电子电信—物理电子学]