图1、2为一种经改进了的共振式消声器。图1是这种消声器剖面,图2为另一种形式的该类型消声器结构示意图。在排气管中间设有共振腔。图1、2中的1、 2、 13是排气管, 3、7、10是共振腔, 4、8是连接用的细管。 图1中排气管 1、2使空腔3分 为前后两部分,因 为排气管的气柱振 动的最 Figures 1 and 2 show an improved resonant muffler. Fig. 1 is a sectional view of the muffler, and Fig. 2 is a schematic view of another type of muffler. In the middle of the exhaust pipe with a resonant cavity. 1, 2, 13 in Figure 1, 2 are exhaust pipes, 3, 7, 10 are resonators, and 4, 8 are thin tubes for connection. Exhaust pipes 1 and 2 in Fig. 1 divide the cavity 3 into two parts, front and rear, because the air column vibrations of the exhaust pipe are the most