【摘要】 微穿孔板吸声结构以其众多的优点,在噪声控制领域得到越来越广泛的应用。因微穿孔板结构中涉及大量的参数,在穿孔板层数较多时,用声电类比法或试验的方法研究微穿孔板结构的吸声性能将变得非常复杂。传递矩阵法尤其适于多层结构的分析,且易于用计算机编程实现。文章推导了用传递矩阵法计算微穿孔板结构声学性能的计算公式,并与用声电类比法计算的结果、试验测定数据进行了对比,结果显示,传递矩阵法是可以作为微穿孔板结构设计的一种简单而有效的参考方法。更多还原

【Abstract】 Microperforated panel absorbers are getting more and more widely use in noise control field for it’s large advantage.Because many parameters are involved in microperforated structure,the analy-sis of absorber’s acoustic characteristic will be very complex by equivalent electrical circuit approach(EECA) or examination method,especially for multi-layer absorbers.Transfer matrix method is suitable for multi-layer absorber’s analysis,and is easy to analyze by computer.This paper deduced the equa-tions to analyze absorber’s acoustic characteristic by transfer matrix method,and contrast the results with the results got by EECA and examination.The results show the transfer matrix method can be used as a simple and effective method for absorber design.更多还原