Ceramsite sound absorption metal sound barrier unit

The invention provides a ceramsite sound absorption metal sound barrier unit. The unit comprises a cavity formed by a metal shell, a cement-based sound absorption plate is arranged in the cavity, and a first air layer, a first cement-based sound absorption plate, a second cement-based sound absorption plate and a second air layer are sequentially arranged in the cavity from the metal shell to the side of a sound source. The invention realizes comprehensive improvement of the acoustic performance of a rail transit sound barrier product. 本发明提供一种陶粒吸声金属声屏障单元，包括由金属壳体构成的腔体，所述腔体内设置水泥基吸声板，自所述金属壳体面向声源一侧起，腔体内依次包括：第一空气层、第一水泥基吸声板、第二水泥基吸声板、第二空气层。本发明实现了轨道交通声屏障产品声学性能的综合提升。