摘要
介绍了用四通道单传声器驻波管法测试材料隔声量的原理及其所使用的数学计算公式,研究了不同吸声末端对实验结果的影响,并确定了本研究所采用的吸声末端。在此基础上,分别对高分子聚氯乙烯和层合复合材料进行了隔声量测试,结果表明这种方法可准确测定小样品垂直入射时的隔声量,且简单易行。
The principle of 4-charmel impedance tube with single-sensor for testing transmission loss（TL） of acoustic materials is introduced, the math-formulas for calculating is also introduced. The influence to the results of different absorbent endings is studied and the best absorbent ending is determined. On this basis, the acoustic transmission losses of PVC polymer and laminated composite materials are tested. The results show that this method can ascertain the accurate transmission loss of small samples with normal incidence.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2009年第18期91-92,106,共3页
Materials Reports
基金
国家自然科学基金资助项目(10472106)
关键词
隔声量
驻波管
传声器
吸声末端
层合复合材料
acoustic transmission loss（TL）, impedance tube, sensor, absorbent ending, laminated composite materials
