【摘要】 采用驻波法测定纸基和多孔水泥基材料在不同构造形式下的吸声系数 ,探讨了材料表面孔洞结构、刻槽深度和吸声单元尺寸等因素对吸声效果的影响。结果表明 ,随着三角形空腔尺寸的减小 ,吸声系数增大 ;水泥基多孔材料吸声效果随着刻槽深度的提高而提高 ,而刻槽单元大小的影响不显著更多还原

【Abstract】 The standing wave tube method is used to determine the sound absorbing coefficients of paper based and cement paper based materials with various structures in this paper.And,the effects of the size and distribution of the pores and holes of the materials,notched depth on the coefficient are explored.The results show that with the decrease of the triangle holes,the coefficient increases.The absorbing coefficient of the porous cement based materials enhances with the increase of the notched depth,but has little to do with the notched units.更多还原