The fold cartridge filter unit was developed by adopting hitech membrane material, and then a new type of gassolid separation equipment was made up with it. 采用高科技膜材料研究制成折叠式滤筒过滤单元，并组合形成一种新型的气固分离设备。
An external pop protection screen may be necessary when close-miking vocalists.The use of a low frequency cutoff filter may also be effective. 当麦克风很靠近演唱者时，可能需要加一个外部静电噪音保护屏，使用一个低频截频滤波器也可能有效。
