【摘要】 在驻波管和混响场内对微穿孔板吸声结构做了吸声测量。同时在混响室对微穿孔板加吸声材料混合结构做了吸声测量。目的是了解微穿孔板在随机入射场或混响场内的吸声特性与垂直入射的关系。文中给出计算及测量结果，并说明了影响微穿孔板吸声结构特性的因素，以及在实际应用中的注意点。对今后要进行的工作提出了建议。更多还原

【Abstract】 Measurements of the absorption characteristics of Microperforated Panel Absorber (MPA) have been carried out in the standing wave tube and reverberation Chamber. Also Measurements of mixed MPP construction were made. The purpose is to compare and to find the relation of normal and random incidence. The results of calculation and measurement are presented, and some factors which affect the characteristics of MPA are given in the paper. Finally some suggestions for further study are proposed.更多还原