Design method of cement-based sound absorption metal sound barrier unit plate

The invention provides a design method of a cement-based sound absorption metal sound barrier unit plate, the cement-based sound absorption metal sound barrier unit plate comprises a porous sound absorption layer, a perforated sound insulation layer and a rear air layer which are arranged along a sound source propagation direction, and the perforated sound insulation layer comprises the following design steps: S1, presetting a perforated radius r of the perforated sound insulation layer; s2, under the preset perforation radius r, the perforation rate under the concerned sound absorption frequency range is determined; s3, the weighted sound reduction index Rc under the perforation rate is determined; and S4, judging according to a judgment condition that Rc is greater than or equal to a design standard limit value. According to the invention, joint optimization of sound absorption and sound insulation performance of structural design of the cement-based sound absorption material can be realized. 本发明提供了一种水泥基吸声金