Sound barrier based on multi-vibrator acoustic metamaterial

The utility model relates to a sound barrier based on a multi-vibrator acoustic metamaterial. The sound barrier comprises a base, a porous sound absorption side plate, a composite inner interlayer and a sound insulation side plate, wherein the porous sound absorption side plate, the composite inner interlayer and the sound insulation side plate are arranged on the base. The composite inner interlayer is arranged between the porous sound absorption side plate and the sound insulation side plate, and the porous sound absorption side plate is connected with the upper end and the lower end of the sound insulation side plate; the porous sound absorption side plates face a noise source; the composite inner interlayer is formed by alternately arranging a plurality of metal plates of different sizes in a gradient mode in the thickness direction of the composite inner interlayer, and the upper end and the lower end of each metal plate are bonded with the adjacent metal plates through elastic filler strips respectively