透明微穿孔吸声板设计与性能实测验证

文章针对航空航天领域的消声降噪需求，基于微穿孔吸声板基础理论，编制了一套快速计算图表，进行透明微穿孔吸声板结构设计，并选用PMMA透光材料和激光打孔工艺来实现。经对正入射吸声系数实测验证表明，快速图表法的计算偏差不超过15%，所设计的吸声板结构、材料和工艺均满足工程要求，可为透明微穿孔吸声板的推广应用提供参考借鉴。

Structure,material, and process design of transparent micro-perforated sound absorbing panel with validation

For the noise reduction and elimination in the aerospace field, based on the basic theory of the micro-perforated sound absorbing panel, a set of fast calculation chart is designed for the structural design of the candidate panel. The PMMA material is chosen for its desirable light transmittance, good workability and weather resistance; and the laser drilling technique is adopted based on the technical and economic considerations. Comparison between the calculated value and the measurement value of the sound absorption coefficient at the normal incidence shows that the computation deviation is not more than 15%, when the structure, the material, and the process design all satisfy the engineering requirements. The results provide some reference in promoting the application of transparent micro-perforated panels.