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依据“扩散场内微穿孔板吸声特性的实验研究”一文初步实验结果，对微穿孔板吸声体在扩散场内吸声特性进行了进一步探讨。在穿孔板常数K值较大时，（K＞2），发现扩散场吸声特性与垂直入射情况相似但移到较高频率范围，除主要吸声频带外，在较高频率由于余切函数的多支性，还有次吸声频带但影响较小．k值较小（K≤2）时，扩散声场吸声特性在高频段的次吸声频带越来越重要，逐渐成为吸声的重要因素，使微穿孔板吸声结构在三或四倍频程以上具有高吸声系数，增加了它的实用价值。文中对扩散场内微穿孔扳吸声性质的变化作了具体计算并作了解释．
Based on the preliminary experimental results of the experimental study on the sound absorption characteristics of micro-perforated plate in diffusion field, the sound absorption characteristics of micro-perforated plate acoustical absorber in the diffusion field are further discussed. When the constant K of the perforated plate is large (K> 2), it is found that the sound absorption characteristics of the diffusion field are similar to those of the normal incidence but shifted to the higher frequency range. Except for the main absorption band, at higher frequencies, Multiply, there are times the sound absorption frequency band but less affected. When the value of k is small (K≤2), the sound absorption characteristic of diffusion sound field is more and more important in the high-frequency sub-absorption sound frequency band and gradually becomes an important factor of sound absorption, making the sound absorption structure of micro- Cheng above has a high absorption coefficient, an increase of its practical value. In this paper, we make a concrete calculation and explain the change of acoustic properties of microprojectiles in diffusion field.