小孔群消声器是近年来根据马大猷教授等人创立的“小孔喷注噪声理论”研制成功的一种新型消声器。它是在一个金属筒体(或管子)的周壁上钻出数千或数万个小孔,使筒体,端用盖板封闭,另一端与生产设备的排气管相接(见图1)。这种消声器具有体积小、重量轻、结构简单、安装方便等优 Hole group muffler is a new type of muffler developed successfully in recent years based on “hole injection noise theory” founded by Professor Ma Dakun and others. It drills thousands or tens of thousands of small holes in the peripheral wall of a metal cylinder (or pipe), the cylinder body and the end are closed with a cover plate, and the other end is connected with the exhaust pipe of the production equipment (see FIG. 1 ). This muffler with small size, light weight, simple structure, easy installation and so on